General Description
The MAX4800A/MAX4802A provide high-voltage switch-
ing on eight channels for ultrasonic imaging and printer
applications. The devices utilize BCDMOS process tech-
nology to provide eight high-voltage low-charge-injection
SPST switches, controlled by a 20MHz serial interface.
Data is clocked into an internal 8-bit shift register and
retained by a programmable latch with enable and clear
inputs. A power-on reset function ensures that all switches
are open on power-up.
The devices operate with a wide range of high-voltage
supplies including: VPP/VNN = +100V/-100V, +185V/-15V,
and +40V/-160V. The digital interface operates from a
separate VDD supply from +2.7V to +6V. Digital inputs
DIN, CLK, LE, and CLR are +6V tolerant, independent
of the VDD supply voltage. The MAX4802A provides
integrated 35kΩ bleed resistors on each switch terminal
to discharge capacitive loads.
The devices are drop-in replacements for the Supertex
HV2203 and HV2303. They are available in the 48-pin
LQFP, 26-bump CSBGA, and 28-pin PLCC packages. All
devices are specified for the commercial 0°C to +70°C
temperature range.
Applications
●Ultrasound Imaging
●Printers
Features
●Fast SPI™ Interface 20MHz
●Pin-Compatible Replacement for Supertex HV2203
(MAX4800A)
●Pin-Compatible Replacement for Supertex HV2303
(MAX4802A)
●Flexible High-Voltage Supplies Up to VPP - VNN =
200V
● Low-Charge-Injection, Low-Capacitance 22Ω
Switches
●DC to 50MHz Analog-Signal Frequency Range
●-77dB Off-Isolation at 5MHz
●Low 10µA Quiescent Current
●Integrated Bleed Resistors (MAX4802A Only)
●Available in Standard PLCC, LQFP, and CSBGA
Packages
19-4120; Rev 2; 4/19
SPI is a trademark of Motorola, Inc.
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
Click here for production status of specific part numbers.
(All voltages referenced to GND.)
VDD Logic Supply Voltage .......................................-0.3V to +7V
VPP - VNN Supply Voltage ..................................................220V
VPP Positive Supply Voltage ................... -0.3V to (VNN + 220V)
VNN Negative Supply Voltage .............................+0.3V to -220V
Logic Inputs LE, CLR, CLK, DIN ............................. -0.3V to +7V
DOUT ....................................................... -0.3V to (VDD + 0.3V)
RGND (MAX4802A) .............................................-4.5V to +0.3V
COM_, NO_ .............................................................. VNN to VPP
Continuous Power Dissipation (TA = +70°C)
26-Bump CSBGA (derate 11.8mW/°C above +70°C) ....
941mW
28-Pin PLCC (derate 10.5mW/°C above +70°C) ........842mW
48-Pin LQFP (derate 22.7mW/°C above +70°C) ......1818mW
Operating Temperature Range ............................... 0°C to +70°C
Storage Temperature Range ............................ -65°C to +150°C
Junction Temperature ...................................................... +150°C
Lead Temperature (excluding CSBGA, soldering, 10s) .. +300°C
Soldering Temperature (reflow)
28 PLCC ......................................................................+245°C
All other packages ....................................................... +260°C
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board.
For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Package Information
PACKAGE TYPE: 26 CSBGA
Package Code X07265+1
Outline Number 21-0158
Land Pattern Number 90-0184
THERMAL RESISTANCE, FOUR-LAYER BOARD
Junction to Ambient (θJA) 85°C/W
Junction to Case (θJC) 23°C/W
PACKAGE TYPE: 28 PLCC
Package Code Q28+13
Outline Number 21-0049
Land Pattern Number 90-0235
THERMAL RESISTANCE, FOUR-LAYER BOARD
Junction to Ambient (θJA) 44°C/W
Junction to Case (θJC) 10°C/W
PACKAGE TYPE: 48 LQFP
Package Code C48+6
Outline Number 21-0054
Land Pattern Number 90-0093
THERMAL RESISTANCE, FOUR-LAYER BOARD
Junction to Ambient (θJA) 44°C/W
Junction to Case (θJC) 10°C/W
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
www.maximintegrated.com Maxim Integrated
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(VDD = +2.7V to +6V, VPP = +40V to (VNN + 200V), VNN = -40V to -160V, TA = TMIN to TMAX, unless otherwise noted. Typical values
are at TA = +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ANALOG SWITCH
Analog-Signal Range VCOM_,
VNO_ (Note 2) VNN +
10
VPP -
10 V
Small-Signal Switch
On-Resistance RONS
VPP = +40V,
VNN = -160V,
VCOM_ = 0V
ICOM = 5mA
TA = 0°C 30
Ω
TA = +25°C 26 38
TA = +70°C 48
ICOM = 200mA
TA = 0°C 25
TA = +25°C 22 27
TA = +70°C 32
VPP = +100V,
VNN = -100V,
VCOM_ = 0V
ICOM = 5mA
TA = 0°C 25
TA = +25°C 22 27
TA = +70°C 30
ICOM = 200mA
TA = 0°C 18
TA = +25°C 18 24
TA = +70°C 27
Small-Signal Switch
On-Resistance RONS
VPP = +160V,
VNN = -40V
ICOM = 5mA
TA = 0°C 23
Ω
TA = +25°C 20 25
TA = +70°C 30
ICOM = 200mA
TA = 0°C 22
TA = +25°C 16 25
TA = +70°C 27
Small-Signal Switch
On-Resistance Matching ΔRONS
VPP = +100V, VNN = -100V,
VCOM_ = 0V, ICOM = 5mA 5 20 %
Large-Signal Switch
On-Resistance RONL VCOM_ = VPP - 10V, ICOM = 1A 15 Ω
Shunt Resistance
(MAX4802A only) RINT NO_ or COM_ to RGND, switch off 30 35 50 kΩ
Switch-Off Leakage ICOM_(OFF),
INO_(OFF)
VCOM_, VNO_ = VPP - 10V or unconnected;
(MAX4800A only)
0 2 µA
10
Switch-Off DC Offset RL = 100kΩ (MAX4800A),
no load (MAX4802A) 0 10 mV
Switch-On DC Offset RL =100kΩ (MAX4800A),
no load (MAX4802A) 0 10 mV
Switch-Output Peak Current
(Note 3) ICOM_ duty cycle ≤ 0.1%
TA = 0°C 3
ATA = +25°C 2 3
TA = +70°C 2
Switch-Output Isolation Diode
Current 300ns pulse width, 2% duty cycle (Note 3) 300 mA
Electrical Characteristics
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
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(VDD = +2.7V to +6V, VPP = +40V to (VNN + 200V), VNN = -40V to -160V, TA = TMIN to TMAX, unless otherwise noted. Typical values
are at TA = +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SWITCH DYNAMIC CHARACTERISITICS
Off-Isolation (Note 3) VISO
f = 5MHz, RL = 1kΩ, CL = 15pF -30 -33 dB
f = 5MHz, RL = 50Ω -58 -77
Crosstalk VCT f = 5MHz, RL = 50Ω (Note 3) -60 -80 dB
COM_, NO_
Off-Capacitance
CCOM_(OFF),
C
NO_ (OFF)
VCOM_ = 0V, VNO_ = 0V, f = 1MHz (Note 3) 411 18 pF
COM_ On-Capacitance CCOM_ (ON) VCOM_ = 0V, f = 1MHz (Note 3) 20 36 56 pF
Output Voltage Spike VSPK RL = 50Ω (Note 3) -150 +150 mV
Charge Injection
(MAX4802A only) Q
VPP = +40V, VNN = -160V, VCOM_ = 0V 820
pCVPP = +100V, VNN = -100V, VCOM_ = 0V 600
VPP = +160V, VNN = -40V, VCOM_ = 0V 350
LOGIC LEVELS
Logic-Input Low Voltage VIL 0.75 V
Logic-Input High Voltage VIH VDD - 0.75 V
Logic Input Capacitance CIN (Note 3) 10 pF
Logic Input Leakage IIN -1 +1 μA
DOUT Low Voltage VOL ISINK = 1mA 0.4 V
DOUT High Voltage VOH ISOURCE = 0.75mA VDD - 0.5 V
POWER SUPPLIES
VDD Supply Voltage VDD 2.7 6.0 V
VPP Supply Voltage VPP 40 VNN + 200 V
VNN Supply Voltage VNN -160 -15 V
VDD Supply Quiescent Current IDDQ VIL = 0V, VIH = VPSD, fCLK = 0Hz 3 μA
VDD Supply Dynamic Current IDD VDD = +5V, VIL = 0V, VIH = +5V,
fCLK = 5MHz 2 mA
VPP Supply Quiescent Current IPPQ All switches remain on or o󰀨,
ICOM_(ON) = 5mA 10 50 μA
VPP Supply Dynamic Current IPP
50kHz
output
switching
frequency
with no load
VPP = +40V,
VNN = -160V
TA = 0°C 6.5
mA
TA = +25°C 6.5
TA = +70°C 6.5
VPP = +100V,
VNN = -100V
TA = 0°C 4.0
TA = +25°C 4.0
TA = +70°C 4.0
VPP = +160V,
VNN = -40V
TA = 0°C 4.0
TA = +25°C 4.0
TA = +70°C 4.0
VNN Supply Quiescent Current INNQ All switches remain on or o󰀨,
ICOM_(ON) = 5mA 10 50 μA
Electrical Characteristics (continued)
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
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(VDD = +2.7V to +6V, VPP = +40V to (VNN + 200V), VNN = -40V to -160V, TA = TMIN to TMAX, unless otherwise noted. Typical values
are at TA = +25°C.) (Note 1)
Note 1: Specifications at 0°C are guaranteed by correlation and design.
Note 2: The analog-signal input VCOM_ and VNO_ must satisfy VNN ≤ (VCOM_, VNO_) ≤ VPP, or remain unconnected during
power-up and power-down.
Note 3: Guaranteed by design and characterization; not production tested.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
VNN Supply Dynamic Current INN
50kHz
output
switching
frequency
with no load
VPP = +40V,
VNN = -160V
TA = 0°C 6.5
mA
TA = +25°C 6.5
TA = +70°C 6.5
VPP = +100V,
VNN = -100V
TA = 0°C 4.0
TA = +25°C 4.0
TA = +70°C 4.0
VPP = +160V,
VNN = -40V
TA = 0°C 4.0
TA = +25°C 4.0
TA = +70°C 4.0
ANALOG SWITCH
Turn-On Time tON VNO_ = VPP - 10V, RL = 10kΩ, VNN = -40V
to -160V 5μs
Turn-Off Time tOFF VNO_ = VPP - 10V, RL = 10kΩ, VNN = -40V
to -160V 5μs
Output Switching Frequency fSW Duty cycle = 50% 50 kHz
Maximum VCOM_,
VNO_ Slew Rate dV/dt (Note 3) 20 V/ns
LOGIC TIMING (Figure 1)
CLK Frequency fCLK Daisy chaining VDD = +5V ±10% 20 MHz
VDD = +3V ±10% 10
DIN to CLK Setup Time tDS
VDD = +5V ±10% 10 ns
VDD = +3V ±10% 16
DIN to CLK Hold Time tDH
VDD = +5V ±10% 3 ns
VDD = +3V ±10% 3
CLK to LE Setup Time tCS
VDD = +5V ±10% 36 ns
VDD = +3V ±10% 65
LE Low Pulse Width tWL
VDD = +5V ±10% 14 ns
VDD = +3V ±10% 22
CLR High Pulse Width tWC
VDD = +5V ±10% 20 ns
VDD = +3V ±10% 40
CLK Rise and Fall Times
(Note 3) tR, tF
VDD = +5V ±10% 50 ns
VDD = +3V ±10% 50
CLK to DOUT Delay tDO
VDD = +5V ±10%, CL ≤ 20pF 6 42 ns
VDD = +3V ±10%, CL ≤ 20pF 12 80
Electrical Characteristics (continued)
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
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(VDD = +5V, VPP = +100V, VNN = -100V, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
0
0.01 1010.1
IDD SUPPLY CURRENT
vs. CLOCK FREQUENCY
1.0
0.9
0.3
0.1
0.7
0.6
0.4
0.2
0.8
0.5
MAX4800A/2A toc01
CLOCK FREQUENCY (MHz)
I
DD
SUPPLY CURRENT (mA)
DIN = 01010101
DIN = 00000000
0
5
10
15
20
25
30
35
40
+40/
-160
+60/
-140
+80/
-120
+100/
-100
+120/
-80
+140/
-60
+160/
-40
ON-RESISTANCE
vs. VPP/VNN SUPPLY VOLTAGE
MAX4800A/2A toc04
VPP/VNN SUPPLY VOLTAGE (V)
ON-RESISTANCE (Ω)
TA = +70°C
TA = 0°C TA = +25°C
0.20
0.25
0.35
0.30
0.40
0.45
SUPPLY CURRENT
vs. VPP/VNN SUPPLY VOLTAGE
MAX4800A/2A toc07
SUPPLY CURRENT (mA)
ONE SWITCH OPERATING
ALL SWITCHES CONNECTED TO GND
fSW = 50kHz
INN
IPP
+40/
-160
+60/
-140
+80/
-120
+100/
-100
+120/
-80
+140/
-60
+160/
-40
VPP/VNN SUPPLY VOLTAGE (V)
0
1.0
0.5
2.0
1.5
3.0
2.5
3.5
LOGIC THRESHOLD
vs. VDD SUPPLY VOLTAGE
MAX4800A/2A toc08
VDD SUPPLY VOLTAGE (V)
LOGIC THRESHOLD (V)
23456
RISING
FALLING
OFF-ISOLATION vs. FREQUENCY
MAX4800A/2A toc02
FREQUENCY (MHz)
OFF-ISOLATION (dB)
-65
-70
-75
-80
-85
-90
-95
-100
-60
1 10
RS = RL = 50Ω
0
40
20
100
80
60
160
140
120
180
0 20 3010 40 50 60 70
CLK TO DOUT DELAY
vs. TEMPERATURE
MAX4800A/2A toc05
TEMPERATURE (°C)
tDO (ns)
VDD = +3V
VDD = +5V
0
10
5
20
15
25
30
0 30 4010 20 50 60 70
ON-RESISTANCE
vs. TEMPERATURE
MAX4800A/2A toc03
TEMPERATURE (°C)
ON-RESISTANCE (Ω)
ISW = 5mA
ISW = 200mA
0
1.0
2.0
4.0
5.0
6.0
0 40 5020 3010 60 70 80 90 100
SUPPLY CURRENT
vs. SWITCHING FREQUENCY
MAX4800A/2A toc06
SWITCHING FREQUENCY (kHz)
SUPPLY CURRENT (mA)
INN
IPP
IDD
ALL SWITCHES OPERATING
ALL SWITCHES CONNECTED TO GND
3.0
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
Maxim Integrated
│
6
www.maximintegrated.com
A
B
C
D
E
F
G
H
123456789
D1
E1 E7
F7
C7
D7
A4
H4
E9
D9
E6
F6
C6
D6
E5
F5
C5
D5
E4
F4
C4
D4
E3
F3
C3
D3
COM0COM1
COM2COM3
COM4 COM5
COM6
COM7
NO0
NO1
NO2
NO3
NO4
NO5
NO6
NO7
DIN
CLK
LE
CLR
DOUT
GND
N.C. (RGND) V
DD
V
PP
V
NN
CSBGA
MAX4800A
MAX4802A
() MAX4802A ONLY
TOP VIEW
Pin/Bump Congurations
CLR
LE
DIN
N.C.
VDD
GND
N.C. (RGND)
N.C.
VNN
N.C.
N.C.
CLK
COM4
N.C.
NO4
N.C.
N.C.
COM3
N.C.
COM2
NO3
N.C.
N.C.
COM5
N.C.
NO1
N.C.
N.C.
VPP
N.C.
NO0
COM1
N.C.
NO2
N.C.
+
NO5
N.C.
NO6
N.C.
COM6
N.C.
NO7
N.C.
COM7
DOUT
N.C.
N.C.
MAX4800A
MAX4802A
COM0
() MAX4802A ONLY
123 4 5 6 78910 11 12
36 35 34 33 32 31 30 29 28 27 26 25
37
38
39
40
41
42
43
44
45
46
47
48
24
23
22
21
20
19
18
17
16
15
14
13
LQFP
(7mm x 7mm)
TOP VIEW
12 13 14 15 16 17 18
1234 262728
19
20
21
22
23
24
25
5
6
7
8
9
10
11
NO5
NO6
COM6
NO7
COM7
DOUT
CLR
VNN
GND
VDD
N.C.
DIN
CLK
LE
COM1
NO1
COM0
NO0
N.C.
VPP
N.C. (RGND)
NO2
COM2
NO3
COM3
NO4
COM4
COM5
MAX4800A
MAX4802A
() MAX4802A ONLY
PLCC
TOP VIEW
+
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
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PIN/BUMP
NAME FUNCTION
MAX4800A
LQFP
MAX4800A
CSBGA
MAX4800A
PLCC
1 E4 26 COM5 Analog Switch 5—Common Terminal
2, 4, 6, 7, 9, 11,
13, 15, 17, 19, 21,
23, 26, 27, 30,
31, 32, 38, 40, 42,
44, 46, 48
D6 9, 11, 15 N.C. No Connection. Not connected internally.
3 E1 27 COM4 Analog Switch 4—Common Terminal
5 E3 28 NO4 Analog Switch 4—Normally Open Terminal
8 D1 1 COM3 Analog Switch 3—Common Terminal
10 D3 2 NO3 Analog Switch 3—Normally Open Terminal
12 D4 3 COM2 Analog Switch 2—Common Terminal
14 C3 4 NO2 Analog Switch 2—Normally Open Terminal
16 C4 5 COM1 Analog Switch 1—Common Terminal
18 A4 6 NO1 Analog Switch 1—Normally Open Terminal
20 C5 7 COM0 Analog Switch 0—Common Terminal
22 D5 8 NO0 Analog Switch 0—Normally Open Terminal
24 C6 10 VPP
Positive High-Voltage Supply. Bypass VPP to GND
with a 0.1µF or greater ceramic capacitor.
25 C7 12 VNN
Negative High-Voltage Supply. Bypass VNN to GND
with a 0.1µF or greater ceramic capacitor.
28 D7 13 GND Ground
29 D9 14 VDD
Digital Supply Voltage. Bypass VDD to GND
with a 0.1µF or greater ceramic capacitor.
33 E9 16 DIN Serial-Data Input
34 E7 17 CLK Serial-Clock Input
35 E6 18 LE Latch-Enable Input, Active Low
36 F7 19 CLR Latch Clear Input
37 F6 20 DOUT Serial-Data Output
39 E5 21 COM7 Analog Switch 7—Common Terminal
41 F5 22 NO7 Analog Switch 7—Normally Open Terminal
43 F4 23 COM6 Analog Switch 6—Common Terminal
45 H4 24 NO6 Analog Switch 6—Normally Open Terminal
47 F3 25 NO5 Analog Switch 5—Normally Open Terminal
Pin/Bump Descriptions
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
www.maximintegrated.com Maxim Integrated
│
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PIN/BUMP
NAME FUNCTION
MAX4802A
LQFP
MAX4802A
CSBGA
MAX4802A
PLCC
1 E4 26 COM5 Analog Switch 5—Common Terminal
2, 4, 6, 7, 9,
11,13, 15, 17,
19, 21, 23, 26,
30, 31, 32, 38,
40, 42, 44, 46, 48
—9, 15 N.C. No Connection. Not connected internally.
3 E1 27 COM4 Analog Switch 4—Common Terminal
5 E3 28 NO4 Analog Switch 4—Normally Open Terminal
8 D1 1 COM3 Analog Switch 3—Common Terminal
10 D3 2 NO3 Analog Switch 3—Normally Open Terminal
12 D4 3 COM2 Analog Switch 2—Common Terminal
14 C3 4 NO2 Analog Switch 2—Normally Open Terminal
16 C4 5 COM1 Analog Switch 1—Common Terminal
18 A4 6 NO1 Analog Switch 1—Normally Open Terminal
20 C5 7 COM0 Analog Switch 0—Common Terminal
22 D5 8 NO0 Analog Switch 0—Normally Open Terminal
24 C6 10 VPP
Positive High-Voltage Supply. Bypass VPP to GND
with a 0.1µF or greater ceramic capacitor.
25 C7 12 VNN
Negative High-Voltage Supply. Bypass VNN to GND
with a 0.1µF or greater ceramic capacitor.
27 D6 11 RGND Bleed Resistor Ground
28 D7 13 GND Ground
29 D9 14 VDD
Digital Supply Voltage. Bypass VDD to GND with a
0.1µF or greater ceramic capacitor.
33 E9 16 DIN Serial-Data Input
34 E7 17 CLK Serial-Clock Input
35 E6 18 LE Latch-Enable Input, Active Low
36 F7 19 CLR Latch Clear Input
37 F6 20 DOUT Serial-Data Output
39 E5 21 COM7 Analog Switch 7—Common Terminal
41 F5 22 NO7 Analog Switch 7—Normally Open Terminal
43 F4 23 COM6 Analog Switch 6—Common Terminal
45 H4 24 NO6 Analog Switch 6—Normally Open Terminal
47 F3 25 NO5 Analog Switch 5—Normally Open Terminal
Pin/Bump Descriptions (continued)
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
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Detailed Description
The MAX4800A/MAX4802A provide high-voltage
switching on eight channels for ultrasound imaging
and printer applications. The devices utilize BCDMOS
process technology to provide eight high-voltage low-
charge-injection SPST switches, controlled by a 20MHz
serial interface. Data is clocked into an internal 8-bit shift
register and retained by a programmable latch with enable
and clear inputs. A power-on reset function ensures that
all switches are open on power-up.
The devices operate with a wide range of high-voltage
supplies including: VPP/VNN = +100V/-100V, +185V/-15V,
or +40V/-160V. The digital interface operates from a
separate VDD supply from +2.7V to +6V. Digital inputs
DIN, CLK, LE, and CLR are +6V tolerant, independent
of the VDD supply voltage. The MAX4802A provides
integrated 35kΩ bleed resistors on each switch terminal
to discharge capacitive loads.
The devices are drop-in replacements for the Supertex
HV2203 and HV2303, respectively.
Analog Switch
The devices allow a peak-to-peak analog-signal range
from VNN + 10V to VPP - 10V. Analog switch inputs must
be unconnected, or satisfy VNN ≤ (VCOM_, VNO_) ≤ VPP
during power-up and power-down.
High-Voltage Supplies
The devices allow a wide range of high-voltage
supplies. The devices operate with VNN from
-160V to -15V and VPP from +40V to (VNN + 200V).
When VNN is connected to GND (single-supply
applications), the devices operate with VPP up to +200V.
Figure 1. Serial Interface Timing*
50%
50%
tWC
90%
tON
DIN
LE
CLK
DOUT
SWITCH
*FOR SLOWER CLK RATES REFER TO THE MAX4800/MAX4801/MAX4802 DATA SHEET.
CLR
OFF
ON
10%
tOFF
tDO
tDH
tDS
50%
50% 50%
50%
50%
50% DNDN-1
DN+1
tWL
tCS
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
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The VPP and VNN high-voltage supplies are not required
to be symmetrical, but the voltage difference VPP - VNN
must not exceed 200V.
Bleed Resistors (MAX4802A)
The MAX4802A features integrated 35kΩ bleed resis-
tors to discharge capacitive loads such as piezoelectric
transducers. Each analog-switch terminal is connected to
RGND with a bleed resistor.
Serial Interface
The devices are controlled by a serial interface with an
8-bit serial shift register and transparent latch. Each of
the eight data bits controls a single analog switch (see
Table 1). Data on DIN is clocked with the most significant
bit (MSB) first into the shift register on the rising edge of
CLK. Data is clocked out of the shift register onto DOUT
on the rising edge of CLK. DOUT reflects the status of
DIN, delayed by eight clock cycles (see Figures 1 and 2).
Latch Enable (LE)
Drive LE logic-low to change the contents of the latch and
update the state of the high-voltage switches (Figure 2).
Drive LE logic-high to freeze the contents of the latch and
prevent changes to the switch states. To reduce noise
due to clock feedthrough, drive LE logic-high while data is
clocked into the shift register. After the data shift register
is loaded with valid data, pulse LE logic-low to load the
contents of the shift register into the latch.
Latch Clear (CLR)
The devices feature a latch clear input. Drive CLR
logic-high to reset the contents of the latch to zero and
open all switches. CLR does not affect the contents of
the data shift register. Pulse LE logic-low to reload the
contents of the shift register into the latch.
Power-On Reset
The devices feature a power-on reset circuit to ensure all
switches are open at power-on. The internal 8-bit serial
shift register and latch are set to zero on power-up.
Figure 2. Latch-Enable Interface Timing
LE
CLK
DOUT
DATA FROM PREVIOUS DATA BYTE POWER-UP DEFAULT: D7–D0 = 0
D7 D6 D5 D4 D3 D2 D1 D0 D7
DIN D7 D6 D5 D4 D3 D2 D1 D0
MSB LSB
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
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Applications Information
Logic Levels
The devices’ digital interface inputs CLK, DIN, LE, and
CLR are tolerant of up to +6V, independent of the VDD
supply voltage, allowing compatibility with higher voltage
controllers.
Daisy Chaining Multiple Devices
Digital output DOUT is provided to allow the connec-
tion of multiple devices by daisy-chaining (Figure 3).
Connect each DOUT to the DIN of the subsequent device
in the chain. Connect CLK, LE, and CLR inputs of all
devices, and drive LE logic-low to update all devices
simultaneously. Drive CLR high to open all the switches
simultaneously. Additional shift registers may be included
anywhere in series with the MAX4800A/MAX4802A data
chain.
Supply Sequencing and Bypassing
The devices do not require special sequencing of the
VDD, VPP, and VNN supply voltages; however, analog
switch inputs must be unconnected, or satisfy VNN ≤
(VCOM_, VNO_) ≤ VPP during power-up and power-down.
Bypass VDD, VNN, and VPP to GND with a 0.1µF ceramic
capacitor as close to the device as possible.
X = Don’t care.
Table 1. Serial Interface Programming
DATA BITS CONTROL
BITS FUNCTION
D0
(LSB) D1 D2 D3 D4 D5 D6 D7
(MSB) LE CLR SW0 SW1 SW2 SW3 SW4 SW5 SW6 SW7
L L L Off
H L L On
L L L Off
H L L On
L L L Off
H L L On
L L L Off
H L L On
L L L Off
H L L On
L L L Off
H L L On
L L L Off
H L L On
L L L Off
H L L On
X X X X X X X X H L Hold Previous State
X X X X X X X X X H Off Off Off Off Off Off Off Off
Chip Information
PROCESS: BCDMOS
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
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Figure 3. Interfacing Multiple Devices by Daisy-Chaining
MAX4800A
LELE
CLKCLK
CLR
MAX4800A MAX4800A
LE
CLK
DIN
LE
CLK
DIN DIN DIN
CLR CLR CLR
DOUT DOUT DOUT
U1nU11U10
Functional Diagrams
SHIFT
REGISTER
LEVEL
SHIFTER
LEVEL
SHIFTER
DIN
CLK
DOUT
CLR
VNN
VPP
GND
COM0
NO0
COM7
NO7
LE
LATCH
VDD
MAX4800A
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
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Functional Diagrams (continued)
SHIFT
REGISTER
LEVEL
SHIFTER
LEVEL
SHIFTER
DIN
CLK
DOUT
CLR
VNN
VPP
GND
COM0
NO0
COM7
NO7
LATCH
VDD
MAX4802A
RGND
LE
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
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Note: All devices are specified over the commercial 0°C to
+70°C temperature range.
*Future product—contact factory for availability.
+Denotes a lead(Pb)-free/RoHS-compliant package.
PART BLEED
RESISTORS
SECOND
SOURCE
PIN-
PACKAGE
MAX4800ACXZ+* No — 26 CSBGA
MAX4800ACQI+ No HV2203PJ-G 28 PLCC
MAX4800ACCM+* No HV2203FG-G 48 LQFP
MAX4802ACXZ+* Yes —26 CSBGA
MAX4802ACQI+ Yes HV2303PJ-G 28 PLCC
MAX4802ACCM+* Yes HV2303FG-G 48 LQFP
Ordering Information/
Selector Guide
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
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REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 5/08 Initial release —
1 2/11
Changed the DC analog-signal frequency range to 50MHz in the Features
section; changed the TQFP package to LQFP in the General Description,
Ordering Information, Features, Pin/Bump Configurations, Pin/Bump
Descriptions, and Package Information
1, 8, 14
2 4/19 Updated the Electrical Characteristics section 5
Revision History
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
MAX4800A/MAX4802A Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
© 2019 Maxim Integrated Products, Inc.
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