MAX4802ACXZ+ [MAXIM]
SPST, 1 Func, 1 Channel, BCDMOS, PBGA28, LEAD FREE, BGA-28;
| 型号： | MAX4802ACXZ+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | SPST, 1 Func, 1 Channel, BCDMOS, PBGA28, LEAD FREE, BGA-28 开关 高压 |
| 文件： | 总15页 (文件大小：217K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4120; Rev 1; 2/11
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
/MX4802A
General Description
Features
The MAX4800A/MAX4802A provide high-voltage switch-
ing on eight channels for ultrasonic 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 reg-
ister 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.
♦ Fast SPI™ Interface 20MHz
♦ Pin-Compatible Replacement for Supertex HV2203
(MAX4800A)
♦ Pin-Compatible Replacement for Supertex HV2303
(MAX4802A)
♦ Flexible High-Voltage Supplies Up to V - V = 200V
PP NN
♦ Low-Charge-Injection, Low-Capacitance 22Ω
The devices operate with a wide range of high-voltage
Switches
supplies including: V /V
= +100V/-100V, +185V/-15V,
PP NN
♦ DC to 50MHz Analog-Signal Frequency Range
♦ -77dB Off-Isolation at 5MHz
and +40V/-160V. The digital interface operates from a
separate V supply from +2.7V to +6V. Digital inputs
DD
DIN, CLK, LE, and CLR are +6V tolerant, independent
♦ Low 10µA Quiescent Current
of the V
supply voltage. The MAX4802A provides
DD
integrated 35kΩ bleed resistors on each switch terminal
♦ Integrated Bleed Resistors (MAX4802A Only)
to discharge capacitive loads.
♦ Available in Standard PLCC, LQFP, and CSBGA
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.
Packages
Pin/Bump Configurations
TOP VIEW
Applications
Ultrasound Imaging
Printers
27 26 25
36 35 34 33 32 31 30 29 28
V
37
38
39
40
24
DOUT
PP
23 N.C.
N.C.
COM7
Ordering Information/
Selector Guide
NO0
22
21
N.C.
N.C.
COM0
NO7 41
N.C. 42
COM6 43
N.C. 44
NO6 45
20
19
18
BLEED
RESISTORS
SECOND
SOURCE
PIN-
PACKAGE
N.C.
NO1
PART
MAX4800A
MAX4802A
17 N.C.
MAX4800ACXZ+*
MAX4800ACQI+
MAX4800ACCM+*
MAX4802ACXZ+*
MAX4802ACQI+
MAX4802ACCM+*
No
No
—
26 CSBGA
16 COM1
HV2203PJ-G 28 PLCC
HV2203FG-G 48 LQFP
46
15
14
13
N.C.
NO2
N.C.
N.C.
NO5 47
No
48
N.C.
Yes
Yes
Yes
—
26 CSBGA
+
HV2303PJ-G 28 PLCC
HV2303FG-G 48 LQFP
10 11 12
9
1
2
3
4
5
6
7
8
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.
LQFP
(7mm x 7mm)
() MAX4802A ONLY
Pin/Bump Configurations continued at end of data sheet.
SPI is a trademark of Motorola, Inc.
________________________________________________________________ Maxim Integrated Products
1
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.
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
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)
V
DD
V
PP
V
PP
V
NN
Logic Supply Voltage........................................-0.3V to +7V
- V
Supply Voltage ....................................................220V
NN
Positive Supply Voltage......................-0.3V to (V
Negative Supply Voltage ..............................+0.3V to -220V
+ 220V)
NN
Logic Inputs LE, CLR, CLK, DIN ..............................-0.3V to +7V
DOUT..........................................................-0.3V to (V + 0.3V)
28 PLCC.......................................................................+245°C
All other packages.......................................................+260°C
DD
RGND (MAX4802A)...............................................-4.5V to +0.3V
COM_, NO_.................................................................V to V
NN
PP
Continuous Power Dissipation (T = +70°C)
A
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
PACKAGE THERMAL CHARACTERISTICS (Note 1)
26 CSBGA
48 LQFP
Junction-to-Ambient Thermal Resistance (θ )...........85°C/W
Junction-to-Ambient Thermal Resistance (θ )...........44°C/W
JA
Junction-to-Case Thermal Resistance (θ )................10°C/W
JA
Junction-to-Case Thermal Resistance (θ )................23°C/W
JC
JC
28 PLCC
Junction-to-Ambient Thermal Resistance (θ )...........44°C/W
JA
Junction-to-Case Thermal Resistance (θ )................10°C/W
JC
/MX4802A
Note 1: 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.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
(V
DD
= +2.7V to +6V, V = +40V to (V
+ 200V), V
= -40V to -160V, T = T
A
to T
, unless otherwise noted. Typical values
MAX
PP
NN
NN
MIN
are at T = +25°C.) (Note 2)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ANALOG SWITCH
V
V
,
V
NN
10
+
V
-
COM_
PP
10
Analog-Signal Range
(Note 3)
V
NO_
T
A
T
A
T
A
T
A
T
A
T
A
T
A
T
A
T
A
T
A
T
A
T
A
= 0°C
30
38
48
25
27
32
25
27
30
18
24
27
I
I
= 5mA
=
= +25°C
= +70°C
= 0°C
26
22
22
18
COM
V
V
V
= +40V,
= -160V,
PP
NN
= 0V
COM_
COM
= +25°C
= +70°C
= 0°C
200mA
Small-Signal Switch
On-Resistance
R
ꢀ
ONS
I
= 5mA
= +25°C
= +70°C
= 0°C
COM
V
PP
= +100V,
= -100V,
V
NN
V
COM_
= 0V
I
=
COM
= +25°C
= +70°C
200mA
2
_______________________________________________________________________________________
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
/MX4802A
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +6V, V = +40V to (V
+ 200V), V
= -40V to -160V, T = T
A
to T
, unless otherwise noted. Typical values
MAX
PP
NN
NN
MIN
are at T = +25°C.) (Note 2)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
23
UNITS
T
A
T
A
T
A
T
A
T
A
T
A
= 0°C
I
= 5mA
= +25°C
= +70°C
= 0°C
20
25
COM
30
Small-Signal Switch
On-Resistance
V
V
NN
= +160V,
= -40V
PP
R
ꢀ
ONS
22
I
=
COM
= +25°C
= +70°C
16
25
200mA
27
Small-Signal Switch
On-Resistance Matching
V
PP
= +100V, V = -100V,
NN
ꢁR
5
20
%
ꢀ
ONS
V
COM_
= 0V, I
= 5mA
COM
Large-Signal Switch
On-Resistance
R
V
COM_
= V - 10V, I = 1A
COM
15
ONL
PP
Shunt Resistance
(MAX4802A only)
R
NO_ or COM_ to RGND, switch off
, V = V - 10V or unconnected;
30
35
0
50
kꢀ
μA
mV
mV
INT
2
I
V
COM_ NO_
COM_(OFF),
PP
Switch-Off Leakage
Switch-Off DC Offset
Switch-On DC Offset
I
(MAX4800A only)
NO_(OFF)
10
R = 100kꢀ (MAX4800A),
L
0
0
10
10
no load (MAX4802A)
R =100kꢀ (MAX4800A),
L
no load (MAX4802A)
T
A
T
A
T
A
= 0°C
3
2
2
Switch-Output Peak Current
(Note 4)
I
duty cycle ꢂ 0.1%
A
= +25°C
= +70°C
3
COM_
Switch-Output Isolation Diode
Current
300ns pulse width, 2% duty cycle (Note 4)
300
mA
SWITCH DYNAMIC CHARACTERISITICS
f = 5MHz, R = 1kꢀ, C = 15pF
-30
-58
-60
-33
-77
-80
L
L
Off-Isolation (Note 4)
V
dB
dB
pF
ISO
f = 5MHz, R = 50ꢀ
L
Crosstalk
V
f = 5MHz, R = 50ꢀ (Note 4)
L
CT
C
COM_(OFF),
COM_, NO_
Off-Capacitance
V
= 0V, V
= 0V, f = 1MHz (Note 4)
4
11
36
18
COM_
COM_
NO_
C
NO_ (OFF)
C
COM_
(ON)
COM_ On-Capacitance
Output Voltage Spike
V
= 0V, f = 1MHz (Note 4)
20
56
pF
V
R = 50ꢀ (Note 4)
L
-150
+150
mV
SPK
V
V
V
= +40V, V = -160V, V = 0V
COM_
820
600
350
PP
PP
PP
NN
Charge Injection
(MAX4802A only)
Q
pC
= +100V, V = -100V, V
= 0V
NN
COM_
= +160V, V = -40V, V
= 0V
NN
COM_
LOGIC LEVELS
Logic-Input Low Voltage
V
0.75
V
V
IL
V
0.75
-
DD
Logic-Input High Voltage
V
IH
_______________________________________________________________________________________
3
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +6V, V = +40V to (V
+ 200V), V
= -40V to -160V, T = T
A
to T
, unless otherwise noted. Typical values
MAX
PP
NN
NN
MIN
are at T = +25°C.) (Note 2)
A
PARAMETER
Logic Input Capacitance
Logic Input Leakage
DOUT Low Voltage
SYMBOL
CONDITIONS
MIN
TYP
MAX
10
UNITS
pF
C
(Note 4)
IN
IN
I
-1
+1
μA
V
I
I
= 1mA
0.4
V
OL
SINK
V
DD
-
DOUT High Voltage
V
= 0.75mA
V
OH
SOURCE
0.5
POWER SUPPLIES
V
Supply Voltage
V
2.7
40
6.0
V
V
DD
DD
V
+
NN
V
Supply Voltage
V
PP
PP
200
V
V
Supply Voltage
V
-160
-15
3
V
NN
NN
Supply Quiescent Current
I
V
V
= 0V, V = V , f = 0Hz
PSD CLK
μA
DD
DDQ
IL
IH
= +5V, V = 0V, V = +5V,
DD
IL
IH
V
Supply Dynamic Current
Supply Quiescent Current
I
2
mA
μA
DD
PP
DD
f
= 5MHz
CLK
All switches remain on or off,
= 5mA
/MX4802A
V
I
10
50
PPQ
I
COM_(ON)
T
T
T
T
T
T
T
T
T
= 0°C
6.5
6.5
6.5
4.0
4.0
4.0
4.0
4.0
4.0
A
A
A
A
A
A
A
A
A
V
V
= +40V,
= -160V
PP
= +25°C
= +70°C
= 0°C
NN
50kHz
output
switching
frequency
with no load
V
V
= +100V,
= -100V
PP
V
PP
V
NN
V
NN
Supply Dynamic Current
Supply Quiescent Current
Supply Dynamic Current
I
mA
μA
= +25°C
= +70°C
= 0°C
PP
NN
V
V
= +160V,
= -40V
PP
= +25°C
= +70°C
NN
All switches remain on or off,
= 5mA
I
10
50
NNQ
I
COM_(ON)
T
T
T
T
T
T
T
T
T
= 0°C
6.5
6.5
6.5
4.0
4.0
4.0
4.0
4.0
4.0
A
A
A
A
A
A
A
A
A
V
V
= +40V,
= -160V
PP
= +25°C
= +70°C
= 0°C
NN
50kHz
output
switching
frequency
with no load
V
V
= +100V,
= -100V
PP
I
mA
= +25°C
= +70°C
= 0°C
NN
NN
V
V
= +160V,
= -40V
PP
= +25°C
= +70°C
NN
4
_______________________________________________________________________________________
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
/MX4802A
TIMING CHARACTERISTICS
(V
DD
= +2.7V to +6V, V = +40V to (V
+ 200V), V
= -40V to -160V, T = T
A
to T
, unless otherwise noted. Typical values
MAX
PP
NN
NN
MIN
are at T = +25°C.) (Note 2)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ANALOG SWITCH
V
= V - 10V, R = 10kΩ, V
= -40V
= -40V
NO_
PP
L
NN
NN
Turn-On Time
t
5
µs
ON
to -160V
V
= V - 10V, R = 10kΩ, V
NO_
PP
L
Turn-Off Time
t
5
µs
OFF
to -160V
Output Switching Frequency
f
Duty cycle = 50%
50
kHz
V/ns
SW
Maximum V
, V
Slew
COM_ NO_
dV/dt
(Note 4)
20
Rate
LOGIC TIMING (Figure 1)
V
V
= +5V 10%
= +3V 10%
20
10
10
16
DD
DD
CLK Frequency
f
Daisy chaining
MHz
ns
CLK
V
V
V
V
V
V
V
V
V
V
V
V
V
V
= +5V 10%
= +3V 10%
= +5V 10%
= +3V 10%
= +5V 10%
= +3V 10%
= +5V 10%
= +3V 10%
= +5V 10%
= +3V 10%
= +5V 10%
= +3V 10%
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DIN to CLK Setup Time
DIN to CLK Hold Time
CLK to LE Setup Time
LE Low Pulse Width
t
DS
DH
3
t
ns
3
36
65
14
22
20
40
t
ns
CS
WL
WC
t
ns
CLR High Pulse Width
CLK Rise and Fall Times (Note 4)
CLK to DOUT Delay
t
ns
50
50
42
80
t , t
R
ns
F
= +5V 10%, C ≤ 20pF
6
L
t
ns
DO
= +3V 10%, C ≤ 20pF
12
L
Note 2: Specifications at 0°C are guaranteed by correlation and design.
Note 3: The analog-signal input V
and V
must satisfy V
≤ (V
, V
) ≤ V , or remain unconnected during power-up
COM_
NO_
NN
COM_ NO_ PP
and power-down.
Note 4: Guaranteed by design and characterization; not production tested.
_______________________________________________________________________________________
5
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
Typical Operating Characteristics
(V
DD
= +5V, V = +100V, V
= -100V, T = +25°C, unless otherwise noted.)
A
PP
NN
ON-RESISTANCE
vs. TEMPERATURE
I
SUPPLY CURRENT
DD
OFF-ISOLATION vs. FREQUENCY
vs. CLOCK FREQUENCY
-100
-95
-90
-85
-80
-75
-70
-65
-60
1.0
30
25
20
15
10
5
R
S
= R = 50Ω
L
0.9
0.8
0.7
0.6
0.5
0.4
I
= 5mA
SW
I
= 200mA
DIN = 01010101
SW
0.3
0.2
0.1
0
DIN = 00000000
1 10
0
1
10
0
10
20
30
40
50
60
70
0.01
0.1
FREQUENCY (MHz)
TEMPERATURE (°C)
CLOCK FREQUENCY (MHz)
ON-RESISTANCE
CLK TO DOUT DELAY
vs. TEMPERATURE
SUPPLY CURRENT
vs. SWITCHING FREQUENCY
vs. V /V SUPPLY VOLTAGE
PP NN
/MX4802A
40
35
30
25
20
15
10
5
6.0
5.0
4.0
3.0
2.0
1.0
180
160
140
120
100
80
ALL SWITCHES OPERATING
ALL SWITCHES CONNECTED TO GND
V
= +3V
DD
I
NN
T
= +70°C
A
I
PP
V
= +5V
DD
60
T
A
= 0°C
T
A
= +25°C
40
20
I
DD
0
0
0
+40/ +60/
-160 -140
+80/ +100/ +120/ +140/ +160/
-120 -100 -80 -60 -40
0
10
20
30
40
50
60
70
0
10 20 30 40 50 60 70 80 90 100
SWITCHING FREQUENCY (kHz)
TEMPERATURE (°C)
V
/V SUPPLY VOLTAGE (V)
PP NN
SUPPLY CURRENT
LOGIC THRESHOLD
vs. V SUPPLY VOLTAGE
vs. V /V SUPPLY VOLTAGE
PP NN
DD
0.45
0.40
0.35
0.30
0.25
0.20
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
ONE SWITCH OPERATING
ALL SWITCHES CONNECTED TO GND
RISING
f
= 50kHz
SW
I
NN
FALLING
I
PP
+40/ +60/
-160 -140
+80/ +100/ +120/ +140/ +160/
-120 -100 -80 -60 -40
2
3
4
5
6
V
DD
SUPPLY VOLTAGE (V)
V
/V SUPPLY VOLTAGE (V)
PP NN
6
_______________________________________________________________________________________
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
/MX4802A
Pin/Bump Descriptions
PIN/BUMP
NAME
FUNCTION
MAX4800A
LQFP
MAX4800A
CSBGA
MAX4800A
PLCC
1
E4
D6
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
9, 11, 15
N.C.
No Connection. Not connected internally.
3
E1
E3
D1
D3
D4
C3
C4
A4
C5
D5
27
28
1
COM4
NO4
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
Analog Switch 0—Common Terminal
Analog Switch 0—Normally Open Terminal
5
8
COM3
NO3
10
12
14
16
18
20
22
2
3
COM2
NO2
4
5
COM1
NO1
6
7
COM0
NO0
8
Positive High-Voltage Supply. Bypass V to GND with a
PP
0.1μF or greater ceramic capacitor.
24
C6
10
V
PP
Negative High-Voltage Supply. Bypass V to GND with a
NN
0.1μF or greater ceramic capacitor.
25
28
29
C7
D7
D9
12
13
14
V
NN
GND
Ground
Digital Supply Voltage. Bypass V to GND with a 0.1μF or
DD
greater ceramic capacitor.
V
DD
33
34
35
36
37
39
41
43
45
47
E9
E7
E6
F7
F6
E5
F5
F4
H4
F3
16
17
18
19
20
21
22
23
24
25
DIN
CLK
Serial-Data Input
Serial-Clock Input
LE
Latch-Enable Input, Active Low
Latch Clear Input
CLR
DOUT
COM7
NO7
COM6
NO6
NO5
Serial-Data Output
Analog Switch 7—Common Terminal
Analog Switch 7—Normally Open Terminal
Analog Switch 6—Common Terminal
Analog Switch 6—Normally Open Terminal
Analog Switch 5—Normally Open Terminal
_______________________________________________________________________________________
7
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
Pin/Bump Descriptions (continued)
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
E3
D1
D3
D4
C3
C4
A4
C5
D5
27
28
1
COM4
NO4
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
Analog Switch 0—Common Terminal
Analog Switch 0—Normally Open Terminal
5
8
COM3
NO3
10
12
14
16
18
20
22
2
3
COM2
NO2
4
5
COM1
NO1
/MX4802A
6
7
COM0
NO0
8
Positive High-Voltage Supply. Bypass V to GND with a
PP
0.1μF or greater ceramic capacitor.
24
25
C6
C7
10
12
V
PP
Negative High-Voltage Supply. Bypass V to GND with a
NN
V
NN
0.1μF or greater ceramic capacitor.
Bleed Resistor Ground
Ground
27
28
D6
D7
11
13
RGND
GND
Digital Supply Voltage. Bypass V to GND with a 0.1μF or
DD
greater ceramic capacitor.
29
D9
14
V
DD
33
34
35
36
37
39
41
43
45
47
E9
E7
E6
F7
F6
E5
F5
F4
H4
F3
16
17
18
19
20
21
22
23
24
25
DIN
CLK
Serial-Data Input
Serial-Clock Input
LE
Latch-Enable Input, Active Low
Latch Clear Input
CLR
DOUT
COM7
NO7
COM6
NO6
NO5
Serial-Data Output
Analog Switch 7—Common Terminal
Analog Switch 7—Normally Open Terminal
Analog Switch 6—Common Terminal
Analog Switch 6—Normally Open Terminal
Analog Switch 5—Normally Open Terminal
8
_______________________________________________________________________________________
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
/MX4802A
D
N-1
50%
D
N
50%
DIN
D
N+1
t
WL
50%
50%
LE
t
CS
50%
50%
CLK
t
t
DS
DH
t
DO
DOUT
ON
t
ON
90%
SWITCH
OFF
10%
t
OFF
50%
50%
CLR
t
WC
*FOR SLOWER CLK RATES REFER TO THE MAX4800/MAX4801/MAX4802 DATA SHEET.
Figure 1. Serial Interface Timing*
provides integrated 35kΩ bleed resistors on each
switch terminal to discharge capacitive loads.
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 are drop-in replacements for the Supertex
HV2203 and HV2303, respectively.
Analog Switch
The devices allow a peak-to-peak analog-signal range
from V
+ 10V to V
- 10V. Analog switch inputs
PP
NN
must be unconnected, or satisfy V
≤ (V
,
COM_
NN
V ) ≤ V during power-up and power-down.
NO_
PP
High-Voltage Supplies
The devices operate with a wide range of high-voltage
The devices allow a wide range of high-voltage sup-
supplies including: V /V
= +100V/-100V,
PP NN
plies. The devices operate with
-160V to -15V and V from +40V to (V
V
NN
from
+ 200V).
+185V/-15V, or +40V/-160V. The digital interface oper-
ates from a separate V supply from +2.7V to +6V.
NN
PP
DD
When V
is connected to GND (single-supply applica-
Digital inputs DIN, CLK, LE, and CLR are +6V tolerant,
independent of the V supply voltage. The MAX4802A
NN
tions), the devices operate with V
up to +200V.
PP
DD
_______________________________________________________________________________________
9
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
LE
CLK
DIN
D6
D6
D5
D5
D4
D4
D3
D3
D2
D2
D1
D1
D7
D0
MSB
LSB
DOUT
D7
D0
D7
/MX4802A
DATA FROM PREVIOUS DATA BYTE POWER-UP DEFAULT: D7–D0 = 0
Figure 2. Latch-Enable Interface Timing
The V
and V
high-voltage supplies are not
NN
Latch Enable (LE)
PP
required to be symmetrical, but the voltage difference
- V must not exceed 200V.
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.
V
PP
NN
Bleed Resistors (MAX4802A)
The MAX4802A features integrated 35kΩ bleed resis-
tors to discharge capacitive loads such as piezoelec-
tric 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 signifi-
cant 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 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 ser-
ial shift register and latch are set to zero on power-up.
10 ______________________________________________________________________________________
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
/MX4802A
Table 1. Serial Interface Programming
DATA BITS
CONTROL BITS
FUNCTION
D0
(LSB)
D7
(MSB)
D1
D2
D3
D4
D5
D6
CLR
SW0
SW1
SW2
SW3
SW4
SW5
SW6
SW7
LE
L
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
H
L
Off
On
H
L
Off
On
H
L
Off
On
H
L
Off
On
H
L
Off
On
H
L
Off
On
H
L
H
X
X
Off
On
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Hold Previous State
Off Off
Off
Off
Off
Off
Off
Off
X = Don’t care.
Supply Sequencing and Bypassing
The devices do not require special sequencing of the
, V , and V supply voltages; however, analog
Applications Information
Logic Levels
V
DD
PP
NN
The devices’ digital interface inputs CLK, DIN, LE, and
switch inputs must be unconnected, or satisfy V
≤
NN
CLR are tolerant of up to +6V, independent of the V
DD
(V
, V
) ≤ V
during power-up and power-
down. Bypass V , V , and V to GND with a 0.1µF
COM_
NO_
PP
DD NN
supply voltage, allowing compatibility with higher volt-
age controllers.
PP
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
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
U10
DOUT
U11
DOUT
U1n
DOUT
DIN
DIN
DIN
DIN
MAX4800A
MAX4800A
MAX4800A
CLK
LE
CLK
LE
CLK
LE
CLK
LE
CLR
CLR
CLR
CLR
Figure 3. Interfacing Multiple Devices by Daisy-Chaining
Functional Diagrams
/MX4802A
V
DD
V
PP
MAX4800A
LATCH
COM0
NO0
LEVEL
SHIFTER
DIN
SHIFT
REGISTER
CLK
DOUT
COM7
NO7
LEVEL
SHIFTER
CLR
LE
V
NN
GND
12 ______________________________________________________________________________________
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
/MX4802A
Functional Diagrams (continued)
V
V
PP
DD
MAX4802A
LATCH
COM0
NO0
LEVEL
SHIFTER
DIN
CLK
SHIFT
REGISTER
COM7
NO7
DOUT
LEVEL
SHIFTER
CLR
LE
V
NN
RGND
GND
Pin/Bump Configurations (continued)
TOP VIEW
4
3
2
1
28 27 26
+
5
6
NO5
25
24
23
22
COM1
NO6
NO1
COM0
NO0
COM6
NO7
7
MAX4800A
MAX4802A
8
9
21 COM7
N.C.
DOUT
20
10
11
V
PP
19
CLR
N.C. (RGND)
12 13 14 15 16 17 18
PLCC
() MAX4802A ONLY
______________________________________________________________________________________ 13
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
Pin/Bump Configurations (continued)
TOP VIEW
1
2
3
4
5
6
7
8
9
+
A4
A
B
C
D
E
MAX4800A
MAX4802A
NO1
C3
NO2
D3
C4
C5
C6
C7
V
PP
V
NN
COM1 COM0
D4
D5
D6
D7
D9
D1
COM3
E1
V
DD
NO3 COM2 NO0 N.C. (RGND)
GND
E7
E3
E4
COM5 COM7
F4
F5
E5
E6
E9
DIN
LE
F6
NO4
F3
CLK
F7
COM4
F
NO5
COM6 NO7
DOUT
CLR
G
H
/MX4802A
H4
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.
PACKAGE TYPE
26 CSBGA
28 PLCC
PACKAGE CODE
X07265+1
Q28+13
OUTLINE NO.
21-0158
LAND PATTERN NO.
90-0184
21-0049
90-0235
48 LQFP
C48+6
21-0054
90-0093
14 ______________________________________________________________________________________
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
/MX4802A
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
5/08
Initial release
—
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
2/11
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.
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