Maxim MAX4802ACCM Low-charge-injection, 8-channel, high-voltage analog switches with 20mhz serial interface Datasheet

19-4120; Rev 1; 2/11
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
♦ 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
Ω
♦ 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
Pin/Bump Configurations
TOP VIEW
CLR
LE
CLK
DIN
N.C.
N.C.
N.C.
VDD
Applications
Ultrasound Imaging
GND
N.C. (RGND)
N.C.
VNN
The MAX4800A/MAX4802A provide high-voltage switching on eight channels for ultrasonic imaging and printer
applications. The devices utilize BCDMOS process
technology to provide eight high-voltage low-chargeinjection 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.
Features
36 35 34 33 32 31 30 29 28 27 26 25
Printers
SECOND
SOURCE
PINPACKAGE
No
—
26 CSBGA
MAX4800ACQI+
No
HV2203PJ-G
MAX4800ACCM+*
No
HV2203FG-G 48 LQFP
—
28 PLCC
MAX4802ACXZ+*
Yes
26 CSBGA
MAX4802ACQI+
Yes
HV2303PJ-G
MAX4802ACCM+*
Yes
HV2303FG-G 48 LQFP
28 PLCC
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.
24
VPP
38
23
39
22
N.C.
NO0
40
21
41
20
N.C.
COM0
N.C.
NO7
N.C.
COM6
N.C.
NO6
42
MAX4800A
MAX4802A
43
19
N.C.
18
NO1
17
45
16
N.C.
NO5
46
15
47
14
N.C.
COM1
N.C.
NO2
N.C.
48
13
N.C.
44
+
1
2
3
4
5
6
7
8
9 10 11 12
COM2
MAX4800ACXZ+*
BLEED
RESISTORS
37
N.C.
COM7
N.C.
COM3
N.C.
NO3
N.C.
PART
DOUT
COM5
N.C.
COM4
N.C.
NO4
N.C.
Ordering Information/
Selector Guide
LQFP
(7mm x 7mm)
() MAX4802A ONLY
SPI is a trademark of Motorola, Inc.
Pin/Bump Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
MAX4800A/MAX4802A
General Description
MAX4800A/MAX4802A
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
ABSOLUTE MAXIMUM RATINGS
(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 CHARACTERISTICS (Note 1)
26 CSBGA
Junction-to-Ambient Thermal Resistance (θJA)...........85°C/W
Junction-to-Case Thermal Resistance (θJC)................23°C/W
28 PLCC
Junction-to-Ambient Thermal Resistance (θJA)...........44°C/W
Junction-to-Case Thermal Resistance (θJC)................10°C/W
48 LQFP
Junction-to-Ambient Thermal Resistance (θJA)...........44°C/W
Junction-to-Case Thermal Resistance (θJC)................10°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
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.
ELECTRICAL CHARACTERISTICS
(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 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
VPP 10
V
ANALOG SWITCH
Analog-Signal Range
VCOM_,
VNO_
VNN +
10
(Note 3)
TA = 0°C
ICOM = 5mA
VPP = +40V,
VNN = -160V,
VCOM_ = 0V
Small-Signal Switch
On-Resistance
30
26
TA = +70°C
ICOM =
200mA
R ONS
ICOM = 5mA
VPP = +100V,
VNN = -100V,
VCOM_ = 0V
TA = +25°C
ICOM =
200mA
48
TA = 0°C
TA = +25°C
25
22
27
TA = +70°C
32
TA = 0°C
25
TA = +25°C
22
27
TA = +70°C
30
TA = 0°C
18
TA = +25°C
18
TA = +70°C
2
38
_______________________________________________________________________________________
24
27
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
(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 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
20
25
TA = 0°C
ICOM = 5mA
Small-Signal Switch
On-Resistance
R ONS
VPP = +160V,
VNN = -40V
ICOM =
200mA
23
TA = +25°C
TA = +70°C
30
TA = 0°C
22
TA = +25°C
16
TA = +70°C
Small-Signal Switch
On-Resistance Matching
RONS
5
15
R ONL
VCOM_ = VPP - 10V, ICOM = 1A
Shunt Resistance
(MAX4802A only)
RINT
NO_ or COM_ to RGND, switch off
30
ICOM_(OFF), VCOM_, VNO_ = V PP - 10V or unconnected;
INO_(OFF) (MAX4800A only)
Switch-Off Leakage
25
27
VPP = +100V, VNN = -100V,
VCOM_ = 0V, ICOM = 5mA
Large-Signal Switch
On-Resistance
UNITS
20
%
35
50
0
2
10
k
μA
Switch-Off DC Offset
RL = 100k (MAX4800A),
no load (MAX4802A)
0
10
mV
Switch-On DC Offset
RL =100k (MAX4800A),
no load (MAX4802A)
0
10
mV
Switch-Output Peak Current
(Note 4)
ICOM_ duty cycle 0.1%
Switch-Output Isolation Diode
Current
TA = 0°C
3
TA = +25°C
2
TA = +70°C
2
A
3
300ns pulse width, 2% duty cycle (Note 4)
300
mA
f = 5MHz, RL = 1k, CL = 15pF
-30
-33
f = 5MHz, RL = 50
-58
-77
f = 5MHz, RL = 50 (Note 4)
-60
-80
CCOM_(OFF),
VCOM_ = 0V, VNO_ = 0V, f = 1MHz (Note 4)
CNO_ (OFF)
4
11
18
pF
20
36
56
pF
+150
mV
SWITCH DYNAMIC CHARACTERISITICS
Off-Isolation (Note 4)
VISO
Crosstalk
VCT
COM_, NO_
Off-Capacitance
COM_ On-Capacitance
Output Voltage Spike
Charge Injection
(MAX4802A only)
CCOM_
(ON)
VSPK
Q
VCOM_ = 0V, f = 1MHz (Note 4)
RL = 50 (Note 4)
-150
VPP = +40V, VNN = -160V, VCOM_ = 0V
820
VPP = +100V, VNN = -100V, VCOM_ = 0V
600
VPP = +160V, VNN = -40V, VCOM_ = 0V
350
dB
dB
pC
LOGIC LEVELS
Logic-Input Low Voltage
Logic-Input High Voltage
VIL
VIH
0.75
VDD 0.75
V
V
_______________________________________________________________________________________
3
MAX4800A/MAX4802A
ELECTRICAL CHARACTERISTICS (continued)
MAX4800A/MAX4802A
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
ELECTRICAL CHARACTERISTICS (continued)
(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 2)
PARAMETER
SYMBOL
CONDITIONS
Logic Input Capacitance
CIN
Logic Input Leakage
I IN
DOUT Low Voltage
VOL
I SINK = 1mA
DOUT High Voltage
VOH
I SOURCE = 0.75mA
MIN
TYP
(Note 4)
-1
MAX
UNITS
10
pF
+1
μA
0.4
V
VDD 0.5
V
POWER SUPPLIES
VDD Supply Voltage
VDD
2.7
6.0
V
V
VPP Supply Voltage
VPP
40
VNN +
200
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
I PPQ
50
μA
All switches remain on or off,
ICOM_(ON) = 5mA
VPP = +40V,
VNN = -160V
VPP Supply Dynamic Current
I PP
50kHz
output
switching
frequency
with no load
VPP = +100V,
VNN = -100V
VPP = +160V,
VNN = -40V
VNN Supply Quiescent Current
INNQ
INN
50kHz
output
switching
frequency
with no load
VPP = +100V,
VNN = -100V
VPP = +160V,
VNN = -40V
4
TA = 0°C
6.5
TA = +25°C
6.5
TA = +70°C
6.5
TA = 0°C
4.0
TA = +25°C
4.0
TA = +70°C
4.0
TA = 0°C
4.0
TA = +25°C
4.0
TA = +70°C
4.0
All switches remain on or off,
ICOM_(ON) = 5mA
VPP = +40V,
VNN = -160V
VNN Supply Dynamic Current
10
10
50
TA = 0°C
6.5
TA = +25°C
6.5
TA = +70°C
6.5
TA = 0°C
4.0
TA = +25°C
4.0
TA = +70°C
4.0
TA = 0°C
4.0
TA = +25°C
4.0
TA = +70°C
4.0
_______________________________________________________________________________________
mA
μA
mA
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
(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 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ANALOG SWITCH
Turn-On Time
tON
VNO_ = VPP - 10V, RL = 10kΩ, VNN = -40V
to -160V
5
µs
Turn-Off Time
tOFF
VNO_ = VPP - 10V, RL = 10kΩ, VNN = -40V
to -160V
5
µs
Output Switching Frequency
fSW
Duty cycle = 50%
50
kHz
Maximum VCOM_, VNO_ Slew
Rate
dV/dt
(Note 4)
CLK Frequency
fCLK
Daisy chaining
DIN to CLK Setup Time
tDS
DIN to CLK Hold Time
tDH
CLK to LE Setup Time
tCS
LE Low Pulse Width
tWL
CLR High Pulse Width
tWC
CLK Rise and Fall Times (Note 4)
t R , tF
CLK to DOUT Delay
tDO
20
V/ns
LOGIC TIMING (Figure 1)
VDD = +5V ±10%
20
VDD = +3V ±10%
10
VDD = +5V ±10%
10
VDD = +3V ±10%
16
VDD = +5V ±10%
3
VDD = +3V ±10%
3
VDD = +5V ±10%
36
VDD = +3V ±10%
65
VDD = +5V ±10%
14
VDD = +3V ±10%
22
VDD = +5V ±10%
20
VDD = +3V ±10%
40
MHz
ns
ns
ns
ns
ns
VDD = +5V ±10%
50
VDD = +3V ±10%
50
VDD = +5V ±10%, CL ≤ 20pF
6
42
VDD = +3V ±10%, CL ≤ 20pF
12
80
ns
ns
Note 2: Specifications at 0°C are guaranteed by correlation and design.
Note 3: The analog-signal input VCOM_ and VNO_ must satisfy VNN ≤ (VCOM_, VNO_) ≤ VPP, or remain unconnected during power-up
and power-down.
Note 4: Guaranteed by design and characterization; not production tested.
_______________________________________________________________________________________
5
MAX4800A/MAX4802A
TIMING CHARACTERISTICS
Typical Operating Characteristics
(VDD = +5V, VPP = +100V, VNN = -100V, TA = +25°C, unless otherwise noted.)
IDD SUPPLY CURRENT
vs. CLOCK FREQUENCY
0.7
0.6
0.5
DIN = 01010101
0.3
25
ON-RESISTANCE (Ω)
-90
30
-85
-80
-75
MAX4800A/2A toc03
-95
OFF-ISOLATION (dB)
0.8
RS = RL = 50Ω
MAX4800A/2A toc02
-100
MAX4800A/2A toc01
ISW = 5mA
20
15
ISW = 200mA
10
-70
0.2
5
-65
0.1
DIN = 00000000
-60
0
0.01
0.1
1
0
1
10
10
20
30
50
60
ON-RESISTANCE
vs. VPP/VNN SUPPLY VOLTAGE
CLK TO DOUT DELAY
vs. TEMPERATURE
SUPPLY CURRENT
vs. SWITCHING FREQUENCY
VDD = +3V
140
120
tDO (ns)
25
20
100
15
VDD = +5V
80
60
TA = 0°C
TA = +25°C
40
5
20
0
0
+60/
-140
+80/
-120
+100/ +120/
-100
-80
+140/ +160/
-60
-40
6.0
ALL SWITCHES OPERATING
ALL SWITCHES CONNECTED TO GND
5.0
INN
4.0
IPP
3.0
2.0
1.0
IDD
0
0
10
20
30
40
50
60
70
0
10 20 30 40 50 60 70 80 90 100
TEMPERATURE (°C)
SWITCHING FREQUENCY (kHz)
SUPPLY CURRENT
vs. VPP/VNN SUPPLY VOLTAGE
INN
0.35
IPP
0.30
MAX4800A/2A toc08
3.5
RISING
3.0
LOGIC THRESHOLD (V)
SUPPLY CURRENT (mA)
0.40
ONE SWITCH OPERATING
ALL SWITCHES CONNECTED TO GND
fSW = 50kHz
LOGIC THRESHOLD
vs. VDD SUPPLY VOLTAGE
MAX4800A/2A toc07
0.45
2.5
FALLING
2.0
1.5
1.0
0.25
0.5
0.20
0
+40/
-160
+60/
-140
+80/
-120
70
MAX4800A/2A toc06
TA = +70°C
160
SUPPLY CURRENT (mA)
MAX4800A/2A toc04
30
180
VPP/VNN SUPPLY VOLTAGE (V)
+100/ +120/
-100
-80
+140/ +160/
-60
-40
2
3
4
5
VDD SUPPLY VOLTAGE (V)
6
VPP/VNN SUPPLY VOLTAGE (V)
6
40
TEMPERATURE (°C)
35
+40/
-160
10
FREQUENCY (MHz)
40
10
0
CLOCK FREQUENCY (MHz)
MAX4800A/2A toc05
IDD SUPPLY CURRENT (mA)
0.9
0.4
ON-RESISTANCE
vs. TEMPERATURE
OFF-ISOLATION vs. FREQUENCY
1.0
ON-RESISTANCE (Ω)
MAX4800A/MAX4802A
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
_______________________________________________________________________________________
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
PIN/BUMP
MAX4800A
LQFP
MAX4800A
CSBGA
MAX4800A
PLCC
NAME
FUNCTION
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.
3
E1
27
COM4
5
E3
28
NO4
8
D1
1
COM3
10
D3
2
NO3
12
D4
3
COM2
14
C3
4
NO2
16
C4
5
COM1
18
A4
6
NO1
No Connection. Not connected internally.
Analog Switch 4—Common Terminal
Analog Switch 4—Normally Open Terminal
Analog Switch 3—Common Terminal
Analog Switch 3—Normally Open Terminal
Analog Switch 2—Common Terminal
Analog Switch 2—Normally Open Terminal
Analog Switch 1—Common Terminal
Analog Switch 1—Normally Open Terminal
20
C5
7
COM0
22
D5
8
NO0
Analog Switch 0—Normally Open Terminal
Analog Switch 0—Common Terminal
24
C6
10
VPP
Positive High-Voltage Supply. Bypass V PP 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
36
F7
19
CLR
Latch Clear Input
37
F6
20
DOUT
Serial-Data Output
39
E5
21
COM7
41
F5
22
NO7
43
F4
23
COM6
45
H4
24
NO6
Analog Switch 6—Normally Open Terminal
47
F3
25
NO5
Analog Switch 5—Normally Open Terminal
Latch-Enable Input, Active Low
Analog Switch 7—Common Terminal
Analog Switch 7—Normally Open Terminal
Analog Switch 6—Common Terminal
_______________________________________________________________________________________
7
MAX4800A/MAX4802A
Pin/Bump Descriptions
MAX4800A/MAX4802A
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
Pin/Bump Descriptions (continued)
PIN/BUMP
MAX4802A
LQFP
MAX4802A
CSBGA
MAX4802A
PLCC
NAME
FUNCTION
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.
8
3
E1
27
COM4
5
E3
28
NO4
8
D1
1
COM3
10
D3
2
NO3
12
D4
3
COM2
14
C3
4
NO2
No Connection. Not connected internally.
Analog Switch 4—Common Terminal
Analog Switch 4—Normally Open Terminal
Analog Switch 3—Common Terminal
Analog Switch 3—Normally Open Terminal
Analog Switch 2—Common Terminal
Analog Switch 2—Normally Open Terminal
16
C4
5
COM1
18
A4
6
NO1
Analog Switch 1—Common Terminal
20
C5
7
COM0
22
D5
8
NO0
Analog Switch 0—Normally Open Terminal
Analog Switch 1—Normally Open Terminal
Analog Switch 0—Common Terminal
24
C6
10
VPP
Positive High-Voltage Supply. Bypass V PP 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
28
D7
13
GND
Ground
29
D9
14
VDD
Digital Supply Voltage. Bypass VDD to GND with a 0.1μF or
greater ceramic capacitor.
Bleed Resistor Ground
33
E9
16
DIN
Serial-Data Input
34
E7
17
CLK
Serial-Clock Input
35
E6
18
LE
36
F7
19
CLR
Latch Clear Input
Serial-Data Output
37
F6
20
DOUT
39
E5
21
COM7
41
F5
22
NO7
Latch-Enable Input, Active Low
Analog Switch 7—Common Terminal
Analog Switch 7—Normally Open Terminal
43
F4
23
COM6
45
H4
24
NO6
Analog Switch 6—Normally Open Terminal
Analog Switch 6—Common Terminal
47
F3
25
NO5
Analog Switch 5—Normally Open Terminal
_______________________________________________________________________________________
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
50%
DN+1
50%
DN
MAX4800A/MAX4802A
DIN
DN-1
tWL
50%
50%
LE
tCS
50%
50%
CLK
tDH
tDS
tDO
DOUT
tON
ON
90%
SWITCH
10%
OFF
tOFF
CLR
50%
50%
tWC
*FOR SLOWER CLK RATES REFER TO THE MAX4800/MAX4801/MAX4802 DATA SHEET.
Figure 1. Serial Interface Timing*
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 lowcharge-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: V PP /V NN = +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 V NN ≤ (V COM_ ,
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 V NN from
-160V to -15V and VPP from +40V to (VNN + 200V).
When VNN is connected to GND (single-supply applications), the devices operate with V PP up to +200V.
_______________________________________________________________________________________
9
MAX4800A/MAX4802A
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
LE
CLK
DIN
D7
D6
D5
D4
D3
D2
D1
MSB
DOUT
D7
D0
LSB
D6
D5
D4
D3
D2
D1
D0
D7
DATA FROM PREVIOUS DATA BYTE POWER-UP DEFAULT: D7–D0 = 0
Figure 2. Latch-Enable Interface Timing
The V PP and V NN 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 resistors 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).
10
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 logichigh 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.
______________________________________________________________________________________
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
DATA BITS
D0
(LSB)
D1
D2
D3
D4
CONTROL BITS
D5
D6
D7
(MSB)
L
H
L
H
L
H
L
H
L
H
L
H
L
H
X
X
X
X
X
X
X
X
X
X
X
X
X
X
L
H
X
X
FUNCTION
LE
CLR
SW0
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
Off
On
SW1
SW2
SW3
SW4
SW5
SW6
SW7
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
Off
Off
Hold Previous State
Off
Off
Off
Off
Off
X = Don’t care.
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.
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 ≤
(V COM_ , V NO_ ) ≤ V PP during power-up and powerdown. Bypass VDD, VNN, and VPP to GND with a 0.1µF
ceramic capacitor as close to the device as possible.
Daisy Chaining Multiple Devices
Digital output DOUT is provided to allow the connection
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.
Chip Information
PROCESS: BCDMOS
______________________________________________________________________________________
11
MAX4800A/MAX4802A
Table 1. Serial Interface Programming
MAX4800A/MAX4802A
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
U10
DIN
DIN
U11
DIN
DOUT
MAX4800A
CLK
CLK
LE
LE
DOUT
U1n
DIN
MAX4800A
LE
MAX4800A
CLK
CLK
CLR
DOUT
LE
CLR
CLR
CLR
Figure 3. Interfacing Multiple Devices by Daisy-Chaining
Functional Diagrams
VDD
VPP
MAX4800A
COM0
LEVEL
SHIFTER
DIN
CLK
NO0
SHIFT
REGISTER
LATCH
DOUT
COM7
LEVEL
SHIFTER
CLR
NO7
LE
GND
12
VNN
______________________________________________________________________________________
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
VDD
VPP
MAX4802A
COM0
LEVEL
SHIFTER
DIN
CLK
NO0
SHIFT
REGISTER
LATCH
COM7
DOUT
LEVEL
SHIFTER
CLR
NO7
LE
VNN
GND
RGND
2
COM4
NO3
3
COM5
COM2
4
NO4
NO2
TOP VIEW
COM3
Pin/Bump Configurations (continued)
1
28
27
26
+
COM1
5
25
NO5
NO1
6
24
NO6
COM0
7
23
COM6
MAX4800A
MAX4802A
DOUT
N.C. (RGND)
11
19
CLR
12
13
14
15
16
17
18
LE
20
CLK
10
DIN
COM7
VPP
N.C.
NO7
21
VDD
22
9
VNN
8
N.C.
GND
NO0
PLCC
() MAX4802A ONLY
______________________________________________________________________________________
13
MAX4800A/MAX4802A
Functional Diagrams (continued)
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
MAX4800A/MAX4802A
Pin/Bump Configurations (continued)
TOP VIEW
2
1
3
4
5
6
7
8
9
+
A4
A
MAX4800A
MAX4802A
NO1
B
C3
C4
C5
C6
C7
NO2
COM1
COM0
VPP
VNN
D5
D6
D7
C
D
E
D1
D3
D4
COM3
NO3
COM2
NO0 N.C. (RGND) GND
D9
VDD
E1
E3
E4
E5
E6
E7
E9
COM4
NO4
F3
COM5
F4
COM7
F5
LE
F6
CLK
F7
DIN
NO5
COM6
NO7
DOUT
CLR
F
G
H4
H
NO6
CSBGA
() MAX4802A ONLY
Package Information
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.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.
14
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
LAND PATTERN NO.
26 CSBGA
X07265+1
21-0158
90-0184
28 PLCC
Q28+13
21-0049
90-0235
48 LQFP
C48+6
21-0054
90-0093
______________________________________________________________________________________
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
REVISION
NUMBER
REVISION
DATE
0
5/08
Initial release
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
DESCRIPTION
PAGES
CHANGED
—
1, 8, 14
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15
© 2011 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
MAX4800A/MAX4802A
Revision History