MAX14802ECM+ [MAXIM]
SPST,;
| 型号： | MAX14802ECM+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | SPST, |
| 文件： | 总20页 (文件大小：214K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MAX14802/MAX14803/
MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
General Description
Features
The MAX14802/MAX14803/MAX14803A provide high-
voltage switching on 16 channels for ultrasonic imaging
and printer applications. The devices utilize HVCMOS
process technology to provide 16 high-voltage low-
charge-injection SPST switches, controlled by a digital
interface. Data is clocked into an internal 16-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.
o Integrated Overvoltage Protection
o 20MHz Serial Interface (5V)
o HVCMOS Technology for High Performance
o Individually Programmable High-Voltage Analog
Switches
o Very Low 5µA (typ) Quiescent Current
The MAX14802/MAX14803/MAX14803A operate with a
wide range of high-voltage supplies including V /V
PP NN
o DC-to-20MHz Low-Voltage Analog Signal
= +100V/-100V, +200V/0V, or +40V/-160V. The digital
interface operates from a separate +2.7V to +5.5V V
Frequency Range
DD
supply. Digital inputs DIN, CLK, LE, and CLR operate
on the V supply voltage.
o 2.7V to 5.5V Logic Supply Voltage
DD
The MAX14803/MAX14803A provide integrated 35kΩ
bleed resistors on each switch terminal to discharge
capacitive loads. The MAX14802/MAX14803/
MAX14803A provide integrated clamping diodes for
overvoltage protection against positive overshoot.
o Low-Charge Injection, Low-Capacitance R
L
Switches
o -77dB (typ) Off-Isolation at 5MHz (R = 50Ω)
L
o Daisy-Chainable Serial Interface
The MAX14802 is available in a 48-pin TQFP package
and is specified for commercial 0°C to +70°C and
extended -40°C to +85°C temperature ranges.
o Flexible High-Voltage Supplies (V - V
= 250V)
PP
NN
The MAX14803 is available in a 48-pin TQFP package
and is specified for the commercial 0°C to +70°C tem-
perature range.
Pin Configurations appear at end of data sheet.
The MAX14803A is available in the 110-bump wafer level
package (WLP) and is specified at the -40°C to +85°C
temperature range.
Applications
Ultrasound Imaging
Printers
Ordering Information/Selector Guide
SWITCH
CHANNELS
PART
BLEED RESISTOR
OVP
PIN-PACKAGE
TEMP RANGE
MAX14802CCM+
MAX14802ECM+
MAX14803CCM+
MAX14803AEWZ+
16
16
16
16
No
No
Yes
Yes
Yes
Yes
48 TQFP
48 TQFP
48 TQFP
110 WLP
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
Yes
Yes
+Denotes a lead(Pb)-free/RoHS-compliant package.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-4484; Rev 4; 6/13
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
Peak Analog Signal Current Per Channel................................3A
V
V
Logic-Supply Voltage .......................................-0.3V to +7V
Continuous Power Dissipation (T = +70°C)
DD
PP
A
- V
Supply Voltage
48-Pin TQFP (derate 22.7mW/°C above +70°C).........1818mW
110-Bump WLP (derate 37mW°C above +70°C)........2960mW
Operating Temperature Range (Commercial)........0°C to +70°C
Operating Temperature Range (Extended).........-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Junction Temperature..................................................... +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
NN
(MAX14802CCM+, MAX14803CCM+)..............................260V
(MAX14802ECM+, MAX14803AEWZ+) ............................230V
V
V
Positive-Supply Voltage.................................-0.3V to +220V
Negative-Supply Voltage...............................-0.3V to -220V
PP
NN
Logic Inputs (LE, CLR, CLK, DIN, DOUT)................-0.3V to +7V
COM_, NO_...............................(-0.3V + V ) to the minimum of
NN
[(V
+ 220V) or (V + 0.3V)]
NN
PP
PACKAGE THERMAL CHARACTERISTICS (Note 1)
TQFP
Junction-to-Ambient Thermal Reistance (θJA)..............44°C/W
Junction-to-Case Thermal Resistance (θJC).................10°C/W
WLP
Junction-to-Ambient Thermal Reistance (θJA)..............27°C/W
Junction-to-Case Thermal Resistance (θJC)...................1°C/W
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.maximintegrated.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
= +2.7V to +5.5V, V = +40V to V
+ 250V, V
= -40V to -160V, T = T
A
to T
, unless otherwise noted. Typical values
MAX
DD
PP
NN
NN
MIN
are at T = +25°C.) (Note 2)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWER SUPPLIES
V
Supply Voltage
V
+2.7
+40
+5.5
V
DD
DD
V
+
NN
MAX14802ECM+, MAX14803AEWZ+
MAX14802CCM+, MAX14803CCM+
+100
200
V
Supply Voltage
V
V
PP
PP
V
+
NN
+40
+100
-100
250
V
V
Supply Voltage
V
-160
0
V
NN
DD
NN
Supply Quiescent
I
5
μA
DDQ
Current
V
Supply Dynamic
DD
I
V
= +5V, V = +5V, f = 5MHz
CLK
0.5
10
mA
μA
DD
DD
LE
Current
V
Supply Quiescent
PP
I
All switches remain on or off, I
= 5mA
COM_
0
PPQ
Current
2
Maxim Integrated
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
ELECTRICAL CHARACTERISTICS (continued)
(V
= +2.7V to +5.5V, V = +40V to V
+ 250V, V
= -40V to -160V, T = T
A
to T
, unless otherwise noted. Typical values
MAX
DD
PP
NN
NN
MIN
are at T = +25°C.) (Note 2)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
V
V
= +40V, V
= -160V, f = 50kHz
COM_
4
6
8
PP
PP
PP
NN
V
Supply Dynamic
PP
Current (All Channel
Switching Simultaneously)
I
PP
= +100V, V
= -100V, f = 50kHz
COM_
3.4
mA
NN
NN
= +160V, V
= -40V, f
= 50kHz
COM_
V
Supply Quiescent
NN
I
All switches remain on or off, I
= 5mA
COM_
0
10
μA
NNQ
Current
V
V
V
= +40V, V
= -160V, f
= 50kHz
= 50kHz
COM_
5
4
3
PP
PP
PP
NN
COM_
V
Supply Dynamic
NN
I
mA
Current (All Channel
Switching Simultaneously)
= +100V, V
= +160V, V
= -100V, f
2.3
NN
NN
= -40V, f
= 50kHz
NN
COM_
ANALOG SWITCH
min of (V
NN
COM_, NO_ Analog Signal
Range
V
V
,
+ 200V)
or (V
COM_
(Note 3)
V
V
NN
-
NO_
PP
10V)
I
I
I
I
I
I
= 5mA
= 200mA
= 5mA
26
22
22
18
20
16
48
32
30
27
30
27
COM_
COM_
COM_
COM_
COM_
COM_
V
V
= +40V, V
= -160V,
PP
NN
= 0V
COM_
Small-Signal Switch
On-Resistance
V
V
= +100V, V = -100V,
PP NN
R
Ω
ONS
= 0V
COM_
= 200mA
= 5mA
V
V
= +160V, V = -40V,
NN
PP
= 0V
COM_
= 200mA
= 0V,
Small-Signal Switch
On-Resistance Matching
V
= +100V, V
= -100V, V
PP
NN COM_
ΔR
5
15
40
0
%
Ω
ONS
I
= 5mA
COM_
Large-Signal Switch
On-Resistance
R
V
= V - 10V, I
= 1A
COM_
ONL
COM_
PP
NO_ or COM_ to GND (MAX14803/MAX14803A),
switch off
Shunt Resistance
R
30
50
2
KΩ
INT
I
COM_(OFF),
Switch-Off Leakage
Switch-Off DC Offset
V
, V
= +100V or unconnected
μA
mV
A
COM_ NO_
I
NO_(OFF)
R = 100kΩ
-30
+30
L
Switch-Output Peak
Current
100ns pulse width, 0.1% duty cycle (Note 4)
300ns pulse width, 2% duty cycle (Note 4)
3
Switch-Output COM_
Isolation Diode Current
500
mA
Maxim Integrated
3
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
ELECTRICAL CHARACTERISTICS (continued)
(V
= +2.7V to +5.5V, V = +40V to V
+ 250V, V
= -40V to -160V, T = T
A
to T
, unless otherwise noted. Typical values
MAX
DD
PP
NN
NN
MIN
are at T = +25°C.) (Note 2)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SWITCH DYNAMIC CHARACTERISTICS
V
V
= +100V, R = 10kΩ,
L
= -100V
NO_
Turn-On Time
Turn-Off Time
t
2
2
3.5
3.5
50
μs
μs
ON
NN
V
V
= +100V, R = 10kΩ,
L
= -100V
NO_
t
OFF
NN
Output Switching
Frequency
f
Duty cycle = 50%
(Note 4)
kHz
V/ns
SW
Maximum V
Slew Rate
, V
COM_ NO_
dV/dt
20
f = 5MHz, R = 1kΩ, C = 15pF
-50
-77
-80
L
L
Off-Isolation
Crosstalk
V
dB
dB
pF
ISO
f = 5MHz, R = 50Ω
L
V
f = 5MHz, R = 50Ω
L
CT
C
COM_(OFF),
COM_, NO_ Off-
Capacitance
V
= 0V, V
= 0V, f = 1MHz (Note 4)
NO_
4
11
36
18
COM_
C
NO_(OFF)
COM_ On-Capacitance
Output-Voltage Spike
C
V
= 0V, f = 1MHz (Note 4)
20
56
pF
COM_(ON)
COM_
V
f
R = 50_ (Note 4)
L
-150
+150
mV
SPK
Small-Signal Analog
Bandwidth
V
= +100V, V
= -100V, C = 200pF
20
MHz
BW
PP
NN
L
V
V
V
= +40V, V
= -160V, V = 0V
COM_
820
600
350
PP
PP
PP
NN
Charge Injection
Q
= +100V, V
= -100V, V
= 0V
COM_
pC
NN
NN
= +160V, V
= -40V, V
= 0V
COM_
LOGIC LEVELS
Logic-Input Low Voltage
V
0.75
0.4
V
V
V
V
IL
V
0.75
-
DD
Logic-Input High Voltage
Logic-Output Low Voltage
Logic-Output High Voltage
V
IH
V
I
I
= 1mA
SINK
OL
OH
V
0.5
-
DD
V
= 0.75mA
SOURCE
Logic-Input Capacitance
Logic-Input Leakage
C
(Note 4)
10
+1
pF
μA
IN
I
IN
-1
4
Maxim Integrated
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
TIMING CHARACTERISTICS
(V
= +2.7V to +5.5V, V = +40V to V
+ 200V, V
= -40V to -160V, T = T
A
to T
, unless otherwise noted. Typical values
MAX
DD
PP
NN
NN
MIN
are at T = +25°C.) (Note 2)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LOGIC TIMING (Figure 1)
V
V
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%
= +5V 10%
= +3V 10%
= +5V 10%
= +3V 10%
20
10
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
CLK Frequency
f
MHz
ns
CLK
10
16
3
DIN to CLK Setup Time
DIN to CLK Hold Time
CLK to LE Setup Time
LE Low-Pulse Width
CLR High-Pulse Width
CLK Rise and Fall Times
CLK to DOUT Delay
t
DS
t
ns
DH
3
36
65
14
22
20
40
t
ns
CS
WL
WC
t
ns
t
ns
50
50
42
80
t , t
R
ns
F
6
t
ns
DO
12
Note 2: All devices are 100% tested at T = +70°C. Limits over the operating temperature range are guaranteed by design and
A
characterization.
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 characterization; not production tested.
Maxim Integrated
5
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
Test Circuits
V
- 10V
PP
R
L
100kΩ
I
SOL
NO_
NO_
NO_
V
OUT
V
+100V
-100V
OUT
COM_
COM_
COM_
R
L
100kΩ
MAX14802
MAX14803
MAX14803A
MAX14802
MAX14803
MAX14803A
MAX14802
MAX14803
MAX14803A
+100V
+100V
V
PP
V
PP
V
DD
+5V
V
V
PP
V
DD
+5V
V
PP
V
PP
V
DD
+5V
PP
V
V
NN
GND
V
NN
V
NN
GND
V
V
GND
NN
NN
NN
-100V
-100V
DC OFFSET ON/OFF
t /t TEST CIRCUIT
ON OFF
SWITCH OFF LEAKAGE
V
= 10V
V
= 10V
P-P
OUT
P-P
OUT
AT 5MHz
AT 5MHz
V
PP
COM_
NO_
COM_
NO_
COM_
NO_
V
OUT
50Ω
V
I
ID
OUT
COM_
V
NN
NO_
R
50Ω
L
MAX14802
MAX14803
MAX14803A
MAX14802
MAX14803
MAX14803A
MAX14802
MAX14803
V
NN MAX14803A
V
V
V
V
+5V
V
V
V
V
V
DD
+5V
PP
PP
DD
PP
PP
V
V
PP
V
V
V
+5V
PP
DD
V
GND
GND
NN
NN
NN
NN
GND
NN
NN
V
V
V
OUT
V
IN
OUT
ISOLATION DIODE CURRENT
V
ISO
= 20LOG
V
= 20LOG
CT
IN
OFF ISOLATION
CROSSTALK
+V
SPK
V
OUT
V
OUT
NO_
NO_
V
OUT
-V
SPK
100pF
50Ω
COM_
COM_
R
L
MAX14802
MAX14803
MAX14803A
MAX14802
MAX14803
MAX14803A
1kΩ
V
COM_
V
V
V
V
V
+5V
V
V
V
V
V
DD
+5V
PP
PP
DD
PP
PP
GND
GND
NN
NN
NN
NN
Q = 1000pF x V
OUT
OUTPUT-VOLTAGE SPIKE
CHARGE INJECTION
6
Maxim Integrated
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
Typical Operating Characteristics
(V
= +3V, V = +100V, V
= -100V, T = +25°C, unless otherwise noted.)
NN A
DD
PP
ON-RESISTANCE vs.
ANALOG SIGNAL VOLTAGE
ON-RESISTANCE vs.
ANALOG SIGNAL VOLTAGE
TURN-ON/TURN-OFF TIME vs.
ANALOG SIGNAL VOLTAGE
180
160
140
120
100
80
5
4
3
2
1
0
V
= +100V, V = -100V
NN
PP
160
140
120
100
80
V
= +160V, V = -40V
NN
PP
V
= +100V, V = -100V
NN
PP
t
OFF
V
= +40V, V = -160V
NN
PP
60
T
A
= +25°C
60
T
= +70°C
A
40
40
20
20
T
= 0°C
t
ON
A
0
0
-150 -100
-50
0
50
100
150
-100
-50
0
50
100
-90
-60
-30
0
30
60
90
V
(V)
V
COM_
(V)
V
(V)
NO_
COM_
LOGIC SUPPLY CURRENT vs.
SUPPLY VOLTAGE
OFF-ISOLATION vs. FREQUENCY
LEAKAGE CURRENT vs. TEMPERATURE
0
-20
-40
-60
-80
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
5.0
4.5
4.0
3.5
3.0
2.5
2.0
I
(V
= +90V)
I
COM_(ON) COM_
(V
= -90V)
= -90V)
COM_(ON) COM_
I
(V
= 0V)
COM_(ON) COM_
T
= +70°C
A
I
(V
COM_(OFF) COM_
T
A
= +25°C
T
= +70°C
I
(V
= 0V)
A
COM_(OFF) COM_
T
A
= +25°C
I
(V
= +90V)
T
A
= 0°C
COM_(OFF) COM_
T
A
= 0°C
0.001
0.01
0.1
1
10
100
2.7
3.1 3.5 3.9
4.3 4.7 5.1 5.5
0
10
20
30
40
50
60
70
FREQUENCY (MHz)
V
DD
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
HIGH-VOLTAGE SUPPLY CURRENT vs.
TEMPERATURE
LOGIC SUPPLY CURRENT vs.
SERIAL-CLOCK FREQUENCY
HIGH-VOLTAGE SUPPLY CURRENT vs.
SWITCHING FREQUENCY
0.20
0.15
0.10
0.05
0
250
200
150
100
50
8
6
4
2
0
V
V
= +100V
= -100V
ALL SWITCHES SWITCHING
PP
NN
T
= +70°C
A
T
A
= +25°C
T
= +25°C
A
I
PP
T
A
= 0°C
I
PP
I
NN
I
NN
0
0
10
20
30
40
50
60
70
0
2
4
6
8
10
0
10
20
30
40
50
TEMPERATURE (°C)
CLK SERIAL-CLOCK FREQUENCY (MHz)
SWITCHING FREQUENCY (kHz)
Maxim Integrated
7
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
Pin Description
PIN
NAME
FUNCTION
TQFP
WLP
A1, A3, A5, A8, A9,
A11, B1–B5, B10,
B11, C1, C3, C5,
C6, C7, C9, C11,
D2, D4–D8, D10,
E1, E3–E9, E11, F2,
F4–F8, F10, G1,
G3, G5, G6, G7, G9,
G11, H2, H4, H6,
H8, H10, J1, J3,
J5, J6, J7, J9, J11,
K1, K2, K4, K6, K8,
K10, K11
1, 2, 14, 16, 24, 35,
36
N.C.
No Connection. Not internally connected.
3
4
J2
H1
F3
COM4 Analog Switch 4—Common Terminal
NO4
NO3
Analog Switch 4—Normally-Open Terminal
Analog Switch 3—Normally-Open Terminal
5
6
F1
COM3 Analog Switch 3—Common Terminal
NO2 Analog Switch 2—Normally-Open Terminal
7
G2
E2
D3
D1
C2
C4
8
COM2 Analog Switch 2—Common Terminal
COM1 Analog Switch 1—Common Terminal
9
10
11
12
NO1
NO0
Analog Switch 1—Normally-Open Terminal
Analog Switch 0—Normally-Open Terminal
COM0 Analog Switch 0—Common Terminal
Negative High-Voltage Supply. Bypass V to GND with a 0.1μF or greater
NN
ceramic capacitor.
13
A4
V
NN
Positive High-Voltage Supply. Bypass V to GND with a 0.1μF or greater
PP
ceramic capacitor.
15
17
18
A2
B6
V
PP
GND
Ground
Digital Supply Voltage. Bypass V to GND with a 0.1μF or greater ceramic
DD
capacitor.
A10
V
DD
19
20
21
22
23
25
26
27
28
29
30
31
B7
A6
DIN
CLK
LE
Serial-Data Input
Serial-Clock Input
Active-Low, Latch-Enable Input
Latch Clear Input
B8
B9
CLR
A7
DOUT Serial-Data Output
C8
COM15 Analog Switch 15—Common Terminal
NO15 Analog Switch 15—Normally-Open Terminal
NO14 Analog Switch 14—Normally-Open Terminal
COM14 Analog Switch 14—Common Terminal
COM13 Analog Switch 13—Common Terminal
NO13 Analog Switch 13—Normally-Open Terminal
COM12 Analog Switch 12—Common Terminal
C10
D11
D9
E10
G10
F11
8
Maxim Integrated
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
Pin Description (continued)
PIN
NAME
FUNCTION
TQFP
32
33
34
37
38
39
40
41
42
43
44
45
46
47
48
WLP
F9
NO12 Analog Switch 12—Normally-Open Terminal
NO11 Analog Switch 11—Normally-Open Terminal
COM11 Analog Switch 11—Common Terminal
COM10 Analog Switch 10—Common Terminal
NO10 Analog Switch 10—Normally-Open Terminal
COM9 Analog Switch 9—Common Terminal
H11
J10
H9
K9
J8
G8
H7
K7
K5
H5
G4
J4
NO9
Analog Switch 9—Normally-Open Terminal
COM8 Analog Switch 8—Common Terminal
NO8
NO7
Analog Switch 8—Normally-Open Terminal
Analog Switch 7—Normally-Open Terminal
COM7 Analog Switch 7—Common Terminal
NO6 Analog Switch 6—Normally-Open Terminal
COM6 Analog Switch 6—Common Terminal
NO5 Analog Switch 5—Normally-Open Terminal
COM5 Analog Switch 5—Common Terminal
K3
H3
D
N
D
N-1
DIN
LE
D
50%
50%
N+1
50%
50%
t
WL
t
CS
50%
50%
CLK
t
t
DH
DS
t
DO
50%
t
DOUT
t
OFF
ON
OFF
ON
90%
SWITCH
CLR
10%
50%
50%
t
WC
Figure 1. Serial Interface Timing
Maxim Integrated
9
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
Bleed Resistors (MAX14803/MAX14803A)
Detailed Description
The MAX14803/MAX14803A feature integrated 35kΩ
bleed resistors to discharge capacitive loads such as
piezoelectric transducers. Each analog switch terminal
is connected to GND with a bleed resistor.
The MAX14802/MAX14803/MAX14803A provide high-
voltage switching on 16 channels for ultrasound imag-
ing and printer applications. The devices utilize
HVCMOS process technology to provide 16 high-volt-
age low-charge-injection SPST switches, controlled by
a digital interface. Data is clocked into an internal 16-
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.
Overvoltage Protection
The MAX14802/MAX14803/MAX14803A feature clamp-
ing diodes (at the COM_). These clamping diodes pro-
vide overvoltage protection against positive overshoot.
Serial Interface
The MAX14802/MAX14803/MAX14803A are controlled
by a serial interface with a 16-bit serial shift register
and transparent latch. Each of the 16 data bits controls
a single analog switch (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 16
clock cycles (Figures 1 and 2).
The MAX14802/MAX14803/MAX14803A operate with a
wide range of high-voltage supplies including: V /V
PP NN
= +100V/-100V, +200V/0V, or +40V/-160V. The digital
interface operates from a separate +2.7V to +5.5V V
DD
supply. Digital inputs DIN, CLK, LE, and CLR operate
on the V supply voltage. The MAX14803/MAX14803A
DD
provide integrated 35kΩ bleed resistors on each switch
terminal to discharge capacitive loads. The MAX14802/
MAX14803/MAX14803A feature clamping diodes (at
the COM_). These clamping diodes provide overvolt-
age protection against positive overshoot.
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.
Analog Switch
The MAX14802/MAX14803/MAX14803A allow a peak-to-
peak analog signal range from V
to the minimum of
NN
either V
+ 200V or (V - 10V). Analog switch inputs
NN
PP
must be unconnected, or satisfy V
≤ (V
, V
) ≤
NN
COM_ NO_
V
PP
during power-up and power-down.
High-Voltage Supplies
The MAX14802/MAX14803/MAX14803A allow a wide
range of high-voltage supplies. The devices operate
Latch Clear (CLR)
The MAX14802/MAX14803/MAX14803A 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.
with V
from -160V to 0 and V from +40V to V
+
NN
NN
PP
250V. When V
is connected to GND (single-supply
NN
applications), the devices operate with V
+200V. The V and V
up to
PP
high-voltage supplies are not
PP
NN
required to be symmetrical, but the voltage difference
(V - V ) must not exceed 250V.
PP
NN
Power-On Reset
The MAX14802/MAX14803/MAX14803A feature a
power-on-reset circuit to ensure all switches are open
at power-on. The internal 16-bit serial shift register and
latch are set to zero on power-up.
10
Maxim Integrated
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
LE
CLK
DIN
D15
D14
D14
D13
D13
D1
D1
D0
LSB
MSB
D15
D15
D0
DOUT
DATA FROM PREVIOUS DATA BYTE
POWER-UP DEFAULT: D15–D0 = 0
Figure 2. Latch Enable Interface Timing
Table 1. Serial Interface Programming (Notes 5–10)
CONTROL
DATA BITS
BITS
FUNCTION
D0
(LSB)
D1 D2 D3
D4
D5
D6
D7
LE CLR SW0 SW1 SW2
SW3 SW4
SW5
SW6
SW7
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
H
L
OFF
ON
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
Maxim Integrated
11
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
Table 1. Serial Interface Programming (Notes 5–10) (continued)
CONTROL
DATA BITS
FUNCTION
BITS
D15
(MSB)
D8
D9 D10 D11 D12 D13 D14
LE CLR SW8 SW9 SW10 SW11 SW12 SW13 SW14 SW15
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
H
L
OFF
ON
OFF
ON
H
L
H
OFF
ON
L
H
OFF
ON
L
H
OFF
ON
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.
Note 5: The 16 switches operate independently.
Note 6: Serial data is clocked in on the rising edge of CLK.
Note 7: The switches go to a state retaining their present condition on the rising edge of LE. When LE is low, the shift register data
flows through the latch.
Note 8: DOUT is high when switch 15 is on.
Note 9: Shift register clocking has no effect on the switch states if LE is high.
Note 10: The CLR input overrides all other inputs.
12
Maxim Integrated
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
LE, and CLR inputs of all devices, and drive LE logic-low
Applications Information
to update all devices simultaneously. Drive CLR high to
open all the switches simultaneously. Additional shift reg-
isters can be included anywhere in series with the
MAX14802/MAX14803/MAX14803A data chain.
For medical ultrasound applications, see Figures 4, 5,
and 6.
Logic Levels
The MAX14802/MAX14803/MAX14803A digital inter-
Supply Sequencing and Bypassing
face inputs CLK, DIN, LE, and CLR operate on the V
DD
The MAX14802/MAX14803/MAX14803A do not require
supply voltage.
special sequencing of the V , V , and V supply
NN
DD
PP
voltages; however, analog switch inputs must be
unconnected, or satisfy V ≤ (V , V ) ≤ V
Daisy-Chaining Multiple Devices
Digital output DOUT is provided to allow the connection
of multiple MAX14802/MAX14803/MAX14803A devices
by daisy-chaining (Figure 3). Connect each DOUT to the
DIN of the subsequent device in the chain. Connect CLK,
NN
COM_
NO_
PP
during power-up and power-down. Bypass V , V
,
DD
PP
and V
to GND with a 0.1μF ceramic capacitor as
NN
close as possible to the device.
Application Diagrams
U11
U10
U1n
DIN1
DOUT
DOUT
DOUT
DIN
DIN
DIN
MAX14802
MAX14803
MAX14803A
MAX14802
MAX14803
MAX14803A
MAX14802
MAX14803
MAX14803A
CLK
LE
CLK
LE
CLK
LE
CLK
LE
CLR
CLR
CLR
CLR
U21
U20
U2n
DOUT
DOUT
DOUT
DIN
DIN
DIN
DIN2
MAX14802
MAX14803
MAX14803A
MAX14802
MAX14803
MAX14803A
MAX14802
MAX14803
MAX14803A
CLK
LE
CLK
LE
CLK
LE
CLR
CLR
CLR
Figure 3. Interfacing Multiple Devices by Daisy-Chaining
Maxim Integrated
13
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
PROBES
MAINFRAME
HIGH-VOLTAGE TRANSMIT
1 PER CHANNEL
PROBE SELECTION
2 TO 4 PROBES
CABLE
1 PER CHANNEL
TRANSDUCERS
2 TO 4 PER CHANNEL
1 TO 2A MAX
100V MAX
RELAY
1 RELAY/CH/PROBE
PROBE
A
HV ANALOG
SWITCHES
2 TO 4 PER CHANNEL
PROBE
B
+V
10mA TYP
LOW-VOLTAGE RECEIVE
64 TO 128 CHANNELS
PROBE
C
1V MAX
HIGH-
VOLTAGE
ISOLATION
PROBE
D
-V
Figure 4. Medical Ultrasound Application—High-Voltage Analog Switches in Probe
14
Maxim Integrated
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
PROBES
MAINFRAME
HV ANALOG
HV TRANSMIT
1 PER CHANNEL
PROBE SELECTION
2 TO 4 PROBES
CABLE
TRANSDUCERS
2 TO 4 PER CHANNEL
SWITCHES
2 TO 4 PER CHANNEL
2 TO 4 PER CHANNEL
100V MAX
1 TO 2A MAX
+V
PROBE
A
RELAYS
2 TO 4 RELAYS/CH/PROBE
10mA TYP
LV RECEIVE
64 TO 128 CHANNELS
1V MAX
HIGH-
VOLTAGE
ISOLATION
PROBE
B
-V
PROBE
C
PROBE
D
Figure 5. Medical Ultrasound Application—High-Voltage Analog Switches in Mainframe
Maxim Integrated
15
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
PROBES
MAINFRAME
HIGH-VOLTAGE TRANSMIT
2 TO 4 PER CHANNEL
PROBE SELECTION
2 TO 4 PROBES
CABLE
2 TO 4 PER CHANNEL
TRANSDUCERS
2 TO 4 PER CHANNEL
1 TO 2A MAX
100V MAX
RELAYS
2 TO 4 RELAYS/CH/PROBE
PROBE
A
+V
-V
LOW-VOLTAGE RECEIVE
64 TO 128 CHANNELS
10mA TYP
1V MAX
PROBE
B
+V
-V
+V
-V
+V
-V
PROBE
C
+V
-V
+V
-V
PROBE
D
+V
-V
+V
-V
HIGH-VOLTAGE
ISOLATION AND
CHANNEL SELECT
2 TO 4 PER CHANNEL
Figure 6. Medical Ultrasound Application—Multiple Transmit and Isolation per Receiver Channel
16
Maxim Integrated
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
Functional Diagram
V
DD
V
PP
CLR
V
PP
COM0
NO0
*
*
LEVEL
SHIFTER
LATCH
V
NN
DIN
V
V
NN
MAX14802
MAX14803
MAX14803A
16-BIT
SHIFT
REGISTER
CLK
PP
COM15
NO15
DOUT
*
*
LEVEL
SHIFTER
LATCH
V
NN
V
NN
LE
GND
V
NN
*BLEED RESISTORS AVAILABLE ON THE MAX14803/MAX14803A ONLY.
Maxim Integrated
17
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
Pin Configurations
TOP VIEW
35 34 33 32 31 30 29 28 27
36
26
25
N.C.
COM10
NO10
24
23
22
21
20
19
18
17
16
15
14
13
37
38
39
DOUT
CLR
LE
COM9
NO9 40
CLK
DIN
COM8 41
NO8
NO7
42
43
MAX14802
MAX14803
V
DD
GND
N.C.
COM7 44
NO6 45
V
COM6
NO5
46
47
48
PP
N.C.
V
COM5
NN
+
2
3
4
5
6
7
8
9
10
1
11
12
TQFP
(7mm x 7mm)
18
Maxim Integrated
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
Pin Configurations (continued)
TOP VIEW
(BUMPS ON BOTTOM)
MAX14803A
1
2
3
4
5
6
7
8
9
10
11
+
A
0.31 mm
N.C.
N.C.
N.C.
NO1
N.C.
COM3
N.C.
NO4
N.C.
N.C.
V
N.C.
N.C.
V
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
COM7
N.C.
NO7
CLK
GND
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
DOUT
DIN
N.C.
LE
N.C.
CLR
V
N.C.
N.C.
PP
NN
DD
B
C
D
E
N.C.
NO0
N.C.
N.C.
N.C.
COM0
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
COM8
N.C.
NO8
COM15
N.C.
N.C.
NO15
N.C.
N.C.
N.C.
COM1
N.C.
COM14
N.C.
NO14
N.C.
0.5 mm
COM2
N.C.
N.C.
N.C.
COM13
N.C.
F
NO3
N.C.
N.C.
NO12
N.C.
COM12
N.C.
G
H
J
NO2
N.C.
NO6
NO9
NO13
N.C.
N.C.
COM5
N.C.
N.C.
N.C.
COM10
N.C.
NO11
N.C.
COM4
N.C.
COM6
N.C.
COM9
N.C.
COM11
N.C.
K
NO5
NO10
N.C.
0.5 mm
WLP
(5.81mm x 5.43mm)
Package Information
Chip Information
For the latest package outline information and land patterns (foot-
prints), 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.
PROCESS: BiCMOS
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
48 TQFP
C48+6
21-0054
90-0093
Refer to
Application
Note 1891
110 WLP
W1105B5+1
21-0494
Maxim Integrated
19
MAX14802/MAX14803/MAX14803A
Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
Revision History
REVISION REVISION
DESCRIPTION
PAGES
CHANGED
NUMBER
DATE
0
4/09
Initial release
—
Corrected two specifications in the Absolute Maximum Ratings section,
changed the minimum of the peak-to-peak analog signal range to “either V
+ 200V
1
2
9/09
2, 9
NN
or (V – 10V)”
PP
Deleted the MAX14800/MAX14801 from the entire data sheet and added the
MAX14803A; added the WLP part to the Ordering Information, Pin Configurations, Pin
Descriptions, and Package Information sections
11/10
1–19
3
4
8/11
6/13
Added extended temperature information; added MAX14802ECM+ to data sheet
1
Updated Absolute Maximum Ratings and Operating Supply Voltages
1, 2
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 specifications 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.
20 ________________________________Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
© 2013 Maxim Integrated Products, Inc.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
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