Maxim MAX4802CXZ Low-charge injection, 8-channel, high-voltage analog switch Datasheet

19-0631; Rev 2; 5/09
Low-Charge Injection,
8-Channel, High-Voltage Analog Switches
The MAX4800/MAX4801/MAX4802 provide high-voltage switching on eight channels for ultrasonic imaging
and printer applications. The devices utilize BCDMOS
process technology to provide eight high-voltage lowcharge-injection SPST switches, controlled by a digital
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 MAX4800/MAX4801/MAX4802 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 +13.2V. Digital inputs DIN, CLK, LE, and CLR
are +13.2V tolerant, independent of the VDD supply
voltage. The MAX4802 provides integrated 35kΩ bleed
resistors on each switch terminal to discharge capacitive loads.
The MAX4800 and MAX4802 are drop-in replacements
for the Supertex HV20220 and HV232. The devices are
available in the 48-pin TQFP, 26-bump CSBGA, and 28pin PLCC packages. The MAX4801 is a drop-in
replacement for the Supertex HV20320 and is available
in the 28-pin PLCC package. All devices are specified
for the commercial 0°C to +70°C temperature range.
Features
♦ Pin-Compatible Replacement for Supertex
HV20220 (MAX4800)
♦ Pin-Compatible Replacement for Supertex
HV20320 (MAX4801)
♦ Pin-Compatible Replacement for Supertex HV232
(MAX4802)
♦ Flexible High-Voltage Supplies Up to VPP - VNN =
200V
♦ Low-Charge Injection, Low-Capacitance 22Ω
Switches
♦ DC to 10MHz Analog-Signal Frequency Range
♦ -77dB Off Isolation at 5MHz
♦ Low 10µA Quiescent Current
♦ Integrated Bleed Resistors (MAX4802)
♦ Available in PLCC, TQFP, and CSBGA Packages
Applications
Ultrasound Imaging
Printers
Ordering Information/Selector Guide
PART
BLEED RESISTORS
SECOND SOURCE
PIN-PACKAGE
MAX4800CCM
No
HV20220FG
48 TQFP
MAX4800CQI
No
HV20220PJ
28 PLCC
MAX4800CXZ
No
HV220**
MAX4801CQI
No
HV20320PJ
28 PLCC
MAX4802CCM
Yes
HV232FG
48 TQFP
MAX4802CQI
Yes
HV232PJ
28 PLCC
MAX4802CXZ
Yes
HV230GA
26 CSBGA
26 CSBGA
Note: All devices are specified over the commercial 0°C to +70°C temperature range.
**Not pin-for-pin compatible.
________________________________________________________________ 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
MAX4800/MAX4801/MAX4802
General Description
MAX4800/MAX4801/MAX4802
Low-Charge Injection,
8-Channel, High-Voltage Analog Switches
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
VDD Logic-Supply Voltage .....................................-0.5V to +15V
VPP - VNN Supply Voltage ....................................................220V
VPP Positive-Supply Voltage ........................-0.5V to VNN + 220V
VNN Negative-Supply Voltage ..............................+0.5V to -220V
Logic Inputs LE, CLR, CLK, DIN ............................-0.5V to +15V
DOUT ............................................................-0.5V to VDD + 0.5V
RGND (MAX4802) .................................................-4.5V to +0.5V
COM_, NO_.................................................................VNN to VPP
Continuous Power Dissipation (TA = +70°C)
28-Pin PLCC (derate 10.5mW/°C above +70°C) ..........842mW
48-Pin TQFP (derate 22.7mW/°C above +70°C).........1818mW
26-Pin CSBGA (derate 11.8mW/°C above +70°C) .......941mW
Operating Temperature Range...............................0°C to +70°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature Range ..........................................+150°C
Lead Temperature (Soldering, 10s).................................+300°C
Bump Temperature (Soldering) Lead-Free......................+260°C
Bump Temperature (Soldering) Lead ..............................+245°C
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 +13.2V, VPP = +40V to VNN + 200V, VNN = -15V 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
VPP 10
V
ANALOG SWITCH
Analog Signal Range
VCOM_,
VNO_
VNN +
10
(Note 2)
TA = 0°C
ICOM = 5mA
VPP = +40V,
VNN = -160V,
VCOM_ = 0
ICOM =
200mA
ICOM = 5mA
Small-Signal Switch
On-Resistance
RONS
VPP = +100V,
VNN = -100V,
VCOM_ = 0
VPP = +160V,
VNN = -40V
or
VPP = +185V,
VNN = -15V,
VCOM _= 0
Small-Signal Switch
On-Resistance Matching
ΔRONS
ICOM =
200mA
ICOM = 5mA
ICOM =
200mA
26
38
TA = +70°C
48
TA = 0°C
25
TA = +25°C
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
27
23
TA = +25°C
20
25
TA = +70°C
30
TA = 0°C
22
TA = +25°C
16
TA = +70°C
5
15
VCOM_ = VPP - 10V, ICOM = 1A
Shunt Resistance
RINT
NO_ or COM_ to RGND (MAX4802), switch
off
25
27
VPP = +100V, VNN = -100V,
VCOM_ = 0, ICOM = 5mA
RONL
Ω
24
TA = 0°C
Large-Signal Switch
On-Resistance
2
30
TA = +25°C
30
35
_______________________________________________________________________________________
20
%
Ω
50
kΩ
Low-Charge Injection,
8-Channel, High-Voltage Analog Switches
(VDD = +2.7V to +13.2V, VPP = +40V to VNN + 200V, VNN = -15V to -160V, TA = TMIN to TMAX, unless otherwise noted. Typical values
are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
VCOM_, VNO_ = VPP - 10V or
ICOM_(OFF), unconnected;
INO_(OFF) RGND unconnected
(MAX4802)
Switch-Off Leakage
MIN
TA = +25°C
TYP
MAX
1
4
TA = TMIN
to TMAX
10
UNITS
µA
Switch-Off DC Offset
RL = 100kΩ (MAX4800/MAX4801),
No load (MAX4802)
100
300
mV
Switch-On DC Offset
RL =100kΩ (MAX4800/MAX4801),
No load (MAX4802)
100
500
mV
TA = 0°C
Switch-Output Peak Current
(Note 3)
Switch-Output Isolation Diode
Current
(Note 3)
3
ICOM_ duty cycle ≤ 0.1% TA = +25°C
2
TA = +70°C
2
300ns pulse width, 2%
duty cycle
VPP – VNN ≤ 200V
COM_, NO1–NO7
300
VPP – VNN
≤ 200V, NO0
30
VPP – VNN ≤ 160V
COM_, NO_
750
3
A
mA
SWITCH DYNAMIC CHARACTERISITICS
Off-Isolation (Note 3)
VISO
Crosstalk (Note 3)
VCT
COM_, NO_
Off-Capacitance
(Note 3)
f = 5MHz, RL = 1kΩ, CL = 15pF
-30
-33
f = 5MHz, RL = 50Ω
-58
-77
f = 5MHz, RL = 50Ω
-60
-80
VCOM_ = 0, VNO_ = 0, f = 1MHz
4
11
18
pF
VCOM_ = 0, f = 1MHz
20
36
56
pF
+150
mV
dB
dB
CCOM_
(OFF),
CNO_ (OFF)
COM_ On-Capacitance
(Note 3)
Output-Voltage Spike (Note 3)
CCOM_
(ON)
VSPK
RL = 50Ω
-150
VPP = +40V, VNN= -160V, VCOM_ = 0
Charge Injection
Q
820
VPP = +100V, VNN = -100V, VCOM_ = 0
600
VPP = +160V, VNN = -40V, VCOM_ = 0
350
pC
LOGIC LEVELS
Logic-Input Low Voltage
Logic-Input High Voltage
VIL
1.5
VDD < +4.5V
0.75
VDD ≥ +4.5V
VDD 1.5
VDD < +4.5V
VDD 0.75
VIH
Logic-Input Capacitance (Note 3)
CIN
Logic-Input Leakage
IIN
DOUT Low Voltage
VDD ≥ +4.5V
VOL
-1
V
V
10
pF
+1
µA
VDD ≥ +4.5V, ISINK = 1mA
0.4
V
VDD < +4.5V, ISINK = 0.5mA
0.4
V
_______________________________________________________________________________________
3
MAX4800/MAX4801/MAX4802
ELECTRICAL CHARACTERISTICS (continued)
MAX4800/MAX4801/MAX4802
Low-Charge Injection,
8-Channel, High-Voltage Analog Switches
ELECTRICAL CHARACTERISTICS (continued)
(VDD = +2.7V to +13.2V, VPP = +40V to VNN + 200V, VNN = -15V to -160V, TA = TMIN to TMAX, unless otherwise noted. Typical values
are at TA = +25°C.) (Note 1)
PARAMETER
DOUT High Voltage
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
VDD ≥ +4.5V, ISOURCE = 0.5mA
VDD 0.5
V
VDD < +4.5V, ISOURCE = 0.25mA
VDD 0.5
V
VOH
POWER SUPPLIES
VDD Supply Voltage
2.7
13.2
V
VPP Supply Voltage
40
VNN +
200
V
-160
VNN Supply Voltage
VDD Supply Quiescent Current
IDDQ
-15
V
VIL = 0, VIH = VDD, fCLK = 0
15
µA
4
mA
50
µA
VDD Supply Dynamic Current
IDD
VDD = +5V, VIL = 0, VIH = +5V,
fCLK = 5MHz
VPP Supply Quiescent Current
IPPQ
All switches remain on or off, ICOM_(ON) =
5mA
VPP = +40V,
VNN = -160V
VPP Supply Dynamic Current
IPP
50kHz
output
switching
frequency
with no load
VPP = +100V,
VNN = -100V
VPP = +160V,
VNN = -40V
VNN Supply Quiescent Current
INNQ
VNN Supply Dynamic Current
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
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
(VDD = +2.7V to +13.2V, VPP = +40V to VNN + 200V, VNN = -15V 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
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 3)
20
V/ns
LOGIC TIMING (Figure 1)
Daisy chaining
CLK Frequency
fCLK
No 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
tR, tF
CLK to DOUT Delay
tDO
VDD ≥ +4.5V
5
VDD ≤ +4.5V
2.5
VDD ≥ +4.5V
10
VDD < +4.5V
4
VDD ≥ +4.5V
15
VDD < +4.5V
40
VDD ≥ +4.5V
35
VDD < +4.5V
60
VDD ≥ +4.5V
150
VDD < +4.5V
300
VDD ≥ +4.5V
150
VDD < +4.5V
300
VDD ≥ +4.5V
150
VDD < +4.5V
300
ns
ns
ns
ns
ns
VDD ≥ +4.5V (Note 3)
1
VDD < +4.5V (Note 3)
1
VDD = +5V ±10%,
CL ≤ 50pF
VDD = +3V ±10%,
CL ≤ 50pF
MHz
TA = 0°C
55
150
TA = +25°C
60
150
TA = +70°C
70
150
TA = TMIN to TMAX
70
280
µs
ns
Note 1: Specifications at 0°C are guaranteed by correlation and design. Electrical parameters are tested at worst case conditions.
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 characterization; not production tested.
_______________________________________________________________________________________
5
MAX4800/MAX4801/MAX4802
TIMING CHARACTERISTICS
Typical Operating Characteristics
(VDD = +5V, VPP = +100V, VNN = -100V, TA = +25°C, unless otherwise noted.)
IDD SUPPLY CURRENT
vs. CLOCK FREQUENCY
2.0
DIN = 01010101
-90
25
ON-RESISTANCE (Ω)
2.5
30
-85
-80
-75
-60
0
10
0
10
20
30
40
50
FREQUENCY (MHz)
TEMPERATURE (°C)
ON-RESISTANCE
vs. VPP/VNN SUPPLY VOLTAGE
tDO vs. TEMPERATURE
SUPPLY CURRENT
vs. SWITCHING FREQUENCY
VDD = +3V
140
TA = +70°C
120
tDO (ns)
25
20
15
100
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
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
0
70
10 20 30 40 50 60 70 80 90 100
SWITCHING FREQUENCY (kHz)
TEMPERATURE (°C)
SUPPLY CURRENT
vs. VPP/VNN SUPPLY VOLTAGE
INN
0.35
IPP
0.30
MAX4800 toc08
8
7
LOGIC THRESHOLD (V)
SUPPLY CURRENT (mA)
0.40
ONE SWITCH OPERATING
ALL SWITCHES CONNECTED TO GND
fSW = 50kHz
LOGIC THRESHOLD
vs. VDD SUPPLY VOLTAGE
MAX4800 toc07
0.45
6
RISING
5
FALLING
4
3
2
0.25
1
0.20
0
+40/
-160
+60/
-140
+80/
-120
+100/ +120/
-100
-80
70
MAX4800 toc06
160
SUPPLY CURRENT (mA)
30
6.0
MAX4800 toc05
MAX4800 toc04
180
VPP/VNN SUPPLY VOLTAGE (V)
+140/ +160/
-60
-40
2
4
6
8
10
VDD SUPPLY VOLTAGE (V)
VPP/VNN SUPPLY VOLTAGE (V)
6
60
CLOCK FREQUENCY (MHz)
35
+40/
-160
ISW = 200mA
10
0
1
10
1
40
10
15
5
-65
0.5
0.1
ISW = 5mA
20
-70
DIN = 00000000
0.01
MAX4800 toc03
-95
3.0
1.0
RS = RL = 50Ω
MAX4800 toc02
MAX4800 toc01
-100
OFF-ISOLATION (dB)
IDD SUPPLY CURRENT (mA)
3.5
1.5
ON-RESISTANCE
vs. TEMPERATURE
OFF-ISOLATION vs. FREQUENCY
4.0
ON-RESISTANCE (Ω)
MAX4800/MAX4801/MAX4802
Low-Charge Injection,
8-Channel, High-Voltage Analog Switches
_______________________________________________________________________________________
12
14
Low-Charge Injection,
8-Channel, High-Voltage Analog Switches
PIN
MAX4800
TQFP
MAX4800
CSBGA
MAX4800
PLCC
MAX4801
PLCC
NAME
1
E4
26
26
COM5
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
11, 14, 15
N.C.
3
E1
27
27
COM4
5
E3
28
28
NO4
8
D1
1
1
COM3
10
D3
2
2
NO3
12
D4
3
3
COM2
14
C3
4
4
NO2
16
C4
5
5
COM1
18
A4
6
6
NO1
FUNCTION
Analog Switch 5 – Common Terminal
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
7
COM0
22
D5
8
8
NO0
Analog Switch 0 – Normally Open Terminal
Analog Switch 0 – Common Terminal
24
C6
10
9
VPP
Positive High-Voltage Supply. Bypass V PP to GND
with a 0.1μF or greater ceramic capacitor.
25
C7
12
10
VNN
Negative High-Voltage Supply. Bypass VNN to GND
with a 0.1μF or greater ceramic capacitor.
28
D7
13
12
GND
Ground
29
D9
14
13
VDD
Digital-Supply Voltage. Bypass VDD to GND with a
0.1μF or greater ceramic capacitor.
33
E9
16
16
DIN
Serial Data Input
34
E7
17
17
CLK
Serial Clock Input
35
E6
18
18
LE
36
F7
19
19
CLR
Latch Clear Input
37
F6
20
20
DOUT
Serial Data Output
39
E5
21
21
COM7
41
F5
22
22
NO7
43
F4
23
23
COM6
45
H4
24
24
NO6
Analog Switch 6 – Normally Open Terminal
47
F3
25
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
MAX4800/MAX4801/MAX4802
Pin Descriptions
Low-Charge Injection,
8-Channel, High-Voltage Analog Switches
MAX4800/MAX4801/MAX4802
Pin Descriptions (continued)
PIN
8
MAX4802
TQFP
MAX4802
CSBGA
MAX4802
PLCC
NAME
1
E4
26
COM5
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.
3
E1
27
COM4
5
E3
28
NO4
8
D1
1
COM3
FUNCTION
Analog Switch 5 – Common Terminal
Not Connected Internally
Analog Switch 4 – Common Terminal
Analog Switch 4 – Normally Open Terminal
Analog Switch 3 – Common Terminal
10
D3
2
NO3
12
D4
3
COM2
14
C3
4
NO2
16
C4
5
COM1
18
A4
6
NO1
20
C5
7
COM0
22
D5
8
NO0
Analog Switch 0 – Normally Open 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.
33
E9
16
DIN
Serial Data Input
34
E7
17
CLK
35
E6
18
LE
36
F7
19
CLR
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
Analog Switch 0 – Common Terminal
Bleed Resistor Ground
Serial Clock Input
Latch Enable Input, Active Low
Latch Clear Input
37
F6
20
DOUT
Serial Data Output
39
E5
21
COM7
Analog Switch 7 – Common Terminal
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
Analog Switch 7 – Normally Open Terminal
Analog Switch 6 – Common Terminal
_______________________________________________________________________________________
Low-Charge Injection,
8-Channel, High-Voltage Analog Switches
50%
DN+1
50%
DN
MAX4800/MAX4801/MAX4802
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
Figure 1. Serial Interface Timing
Detailed Description
The MAX4800/MAX4801/MAX4802 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 digital
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 MAX4800/MAX4801/MAX4802 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 +13.2V. Digital inputs DIN, CLK, LE, and CLR
are +13.2V tolerant, independent of the VDD supply
voltage. The MAX4802 provides integrated 35kΩ bleed
resistors on each switch terminal to discharge capacitive loads.
The MAX4800 and MAX4802 are drop-in replacements
for the Supertex HV20220 and HV232, respectively.
The MAX4801 is a drop-in replacement for the Supertex
HV20320.
Analog Switch
The MAX4800/MAX4801/MAX4802 allow a peak-topeak analog signal range from VNN + 10V to VPP - 10V.
Analog switch inputs must be unconnected, or satisfy
V NN ≤ (V COM_ , V NO_ ) ≤ V PP during power-up and
power-down.
High-Voltage Supplies
The MAX4800/MAX4801/MAX4802 allow a wide range
of high-voltage supplies. The devices operate with VNN
from -160V to -15V and VPP from +40V to VNN + 200V.
_______________________________________________________________________________________
9
MAX4800/MAX4801/MAX4802
Low-Charge Injection,
8-Channel, High-Voltage Analog Switches
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
When VNN is connected to GND (single-supply applications), the devices operate with VPP up to +200V. 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 (MAX4802)
The MAX4802 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 MAX4800/MAX4801/MAX4802 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 MAX4800/MAX4801/MAX4802 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 MAX4800/MAX4801/MAX4802 feature a power-on
reset circuit to ensure all switches are open at poweron. 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
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
HOLD PREVIOUS STATE
OFF
OFF
OFF
OFF
OFF
OFF
X = Don’t Care
Applications Information
Logic Levels
The MAX4800/MAX4801/MAX4802 digital interface
inputs CLK, DIN, LE, and CLR are tolerant of up to
+13.2V, independent of the VDD supply voltage, allowing compatibility with higher voltage controllers.
Daisy Chaining Multiple Devices
Digital output DOUT is provided to allow the connection
of multiple MAX4800/MAX4801/MAX4802 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
MAX4800/MAX4801/MAX4802 data chain.
Supply Sequencing and Bypassing
The MAX4800/MAX4801/MAX4802 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.
Chip Information
PROCESS: BCDMOS
______________________________________________________________________________________
11
MAX4800/MAX4801/MAX4802
Table 1. Serial Interface Programming
MAX4800/MAX4801/MAX4802
Low-Charge Injection,
8-Channel, High-Voltage Analog Switches
U10
DIN
DIN
U11
DIN
DOUT
MAX4800
CLK
CLK
LE
LE
DOUT
U1n
DIN
MAX4800
MAX4800
CLK
CLK
LE
CLR
DOUT
LE
CLR
CLR
CLR
Figure 3. Interfacing Multiple Devices by Daisy-Chaining
Functional Diagrams
VDD
VPP
MAX4800
MAX4801
COM0
LEVEL
SHIFTER
DIN
CLK
NO0
SHIFT
REGISTER
LATCH
DOUT
LEVEL
SHIFTER
CLR
COM7
NO7
LE
GND
12
VNN
______________________________________________________________________________________
Low-Charge Injection,
8-Channel, High-Voltage Analog Switches
VDD
VPP
MAX4802
COM0
LEVEL
SHIFTER
DIN
CLK
NO0
SHIFT
REGISTER
LATCH
COM7
DOUT
LEVEL
SHIFTER
CLR
NO7
LE
GND
VNN
RGND
______________________________________________________________________________________
13
MAX4800/MAX4801/MAX4802
Functional Diagrams (continued)
Low-Charge Injection,
8-Channel, High-Voltage Analog Switches
CLR
LE
CLK
DIN
N.C.
N.C.
N.C.
VDD
TOP VIEW
GND
N.C. (RGND)
N.C.
VNN
MAX4800/MAX4801/MAX4802
Pin Configurations
36 35 34 33 32 31 30 29 28 27 26 25
DOUT
37
24
VPP
N.C.
COM7
38
23
39
22
40
21
41
20
N.C.
NO0
N.C.
COM0
N.C.
NO7
N.C.
COM6
N.C.
NO6
42
MAX4800
MAX4802
43
44
19
N.C.
18
NO1
17
N.C.
COM1
45
16
N.C.
NO5
46
15
47
14
N.C.
NO2
N.C.
48
13
N.C.
5
6
7
8
9 10 11 12
COM2
4
N.C.
COM3
N.C.
NO3
N.C.
3
COM4
N.C.
NO4
N.C.
2
COM5
N.C.
1
TQFP
7mm x 7mm
COM3
NO4
COM4
COM5
28
NO3
NO4
1
COM2
COM3
2
NO2
NO3
3
COM4
COM2
4
COM5
NO2
()MAX4802 ONLY
27
26
4
3
2
1
28
27
26
COM1
5
25
NO5
NO1
6
24
NO6
COM0
7
NO0
8
MAX4800
MAX4802
23
COM6
22
NO7
COM1
5
25
NO5
NO1
6
24
NO6
COM0
7
NO0
8
MAX4801
COM6
22
NO7
COM7
CLR
12
13
14
15
16
17
18
12
PLCC
13
14
15
16
17
18
LE
19
CLK
11
DIN
N.C.
N.C.
CLR
VDD
N.C. (RGND)
19
N.C.
DOUT
11
GND
20
LE
21
10
CLK
9
VNN
DIN
VPP
DOUT
N.C.
COM7
20
VDD
21
10
GND
9
VPP
VNN
N.C.
PLCC
()MAX4802 ONLY
14
23
______________________________________________________________________________________
Low-Charge Injection,
8-Channel, High-Voltage Analog Switches
TOP VIEW
1
2
3
4
5
6
7
8
9
A4
A
MAX4800
MAX4802
NO1
B
C
D
E
C3
C4
C5
C6
C7
NO2
COM1
COM0
VPP
VNN
D5
D6
D7
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
H
H4
NO6
CSBGA
()MAX4802 ONLY
Package Information
For the latest package outline information and land patterns, 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.
PACKAGE TYPE
PACKAGE CODE
DOCUMENT NO.
28 PLCC
Q28-4
21-0049
26 CSBGA
X07265-1
21-0158
48 TQFP
C48-6
21-0054
______________________________________________________________________________________
15
MAX4800/MAX4801/MAX4802
Pin Configurations (continued)
MAX4800/MAX4801/MAX4802
Low-Charge Injection,
8-Channel, High-Voltage Analog Switches
Revision History
REVISION
NUMBER
REVISION
DATE
0
8/06
DESCRIPTION
Initial release.
PAGES
CHANGED
—
• Updated “Second Source” column and revised two package codes in the
Ordering Information/Selector Guide section.
1
3/07
• Updated the pin numbers of the MAX4802 TQFN in the Pin Descriptions column.
Replaced the TQFN Pin Configurations.
1, 7, 8, 14, 18, 19,
20, 21
• Added package drawing 21-0158 to the Package Information section.
2
5/09
Deleted TQFN from the Ordering Information/Selector Guide, Pin Descriptions, Pin
Configurations, and Package Information sections.
1, 7, 8, 14, 20, 21
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.
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