MAIXM MAX14802, MAX14803, MAX14803A User Manual

General Description

The MAX14802/MAX14803/MAX14803A provide high­voltage switching on 16 channels for ultrasonic imaging
and printer applications. The devices utilize HVCMOS
process technology to provide 16 high-voltage low­charge-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.

The MAX14802/MAX14803/MAX14803A operate with a
wide range of high-voltage supplies including VPP/V

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

DD

supply voltage.

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.

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.

The MAX14803 is available in a 48-pin TQFP package
and is specified for the commercial 0°C to +70°C tem­perature range.

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

Features

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

o DC-to-20MHz Low-Voltage Analog Signal

Frequency Range

o 2.7V to 5.5V Logic Supply Voltage

o Low-Charge Injection, Low-Capacitance R

L

Switches

o -77dB (typ) Off-Isolation at 5MHz (R

L

= 50Ω)

o Daisy-Chainable Serial Interface

o Flexible High-Voltage Supplies (VPP- VNN= 230V)

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,

High-Voltage Analog Switches

________________________________________________________________

Maxim Integrated Products

1

Ordering Information/Selector Guide

19-4484; Rev 3; 8/11

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.

PART

SWITCH

CHANNELS

BLEED RE SISTOR OVP PIN-PACKAGE TEMP RANGE

MAX14802CCM+ 16 No Yes 48 TQFP 0°C to +70°C

MAX14802ECM+ 16 No Yes 48 TQFP -40°C to +85°C

MAX14803CCM+ 16 Yes Yes 48 TQFP 0°C to +70°C

MAX14803AEWZ+ 16 Yes Yes 110 WLP -40°C to +85°C

Pin Configurations appear at end of data sheet.

+

Denotes a lead(Pb)-free/RoHS-compliant package.

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= +2.7V to +5.5V, VPP= +40V to VNN+ 250V, VNN= -40V to -160V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values

are at T

A

= +25°C.) (Note 2)

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.

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

.

(All voltages referenced to GND.)
V

DD

Logic-Supply Voltage .......................................-0.3V to +7V

V

PP

- VNNSupply Voltage ....................................................230V

V

PP

Positive-Supply Voltage.................................-0.3V to +220V

V

NN

Negative-Supply Voltage ...............................-0.3V to -220V

Logic Inputs (LE, CLR, CLK, DIN, DOUT)................-0.3V to +7V

COM_, NO_...............................(-0.3V + V

NN

) to the minimum of

[(V

NN

+ 220V) or (VPP+ 0.3V)]

Peak Analog Signal Current Per Channel ................................3A

Continuous Power Dissipation (TA= +70°C)

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

PACKAGE THERMAL CHARACTERISTICS (Note 1)

TQFP

Junction-to-Ambient Thermal Reistance (

θ

JA

)..............44°C/W

Junction-to-Case Thermal Resistance (

θ

JC

).................10°C/W

WLP

Junction-to-Ambient Thermal Reistance (

θ

JA

)..............27°C/W

Junction-to-Case Thermal Resistance (

θ

JC

)...................1°C/W

POWER SUPPLIES

V

VPP Supply Voltage V

VNN Supply Voltage V

V
Current

V
Current

V
Current

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage V

DD

Supply Quiescent

DD

Supply Dynamic

DD

Supply Quiescent

PP

I

DDQ

I

DD

I

PPQ

DD

PP

NN

VDD = +5V, V LE = +5V, f

All switches remain on or off, I

CLK

= 5MHz 0.5 mA

COM_

= 5mA 0 10 µA

+2.7 +5.5 V

V

+

+40 +100

-160 -100 0 V

NN

200

5µA

V

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,

High-Voltage Analog Switches

_______________________________________________________________________________________ 3

),

)

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +2.7V to +5.5V, VPP= +40V to VNN+ 250V, VNN= -40V to -160V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values

are at T

A

= +25°C.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

V

Supply Dynamic

PP

Current (All Channel
S w i tchi ng S i m ul taneousl y)

V

Supply Quiescent

NN

Current

V

Supply Dynamic

NN

Current (All Channel
S w i tchi ng S i m ul taneousl y)

I

PP

I

NNQ

I

NN

VPP = +40V, VNN = -160V, f

VPP = +100V, VNN = -100V, f

VPP = +160V, VNN = -40V, f

All switches remain on or off, I

VPP = +40V, VNN = -160V, f

VPP = +100V, VNN = -100V, f

VPP = +160V, VNN = -40V, f

COM_

COM_

COM_

COM_

COM_

COM_

COM_

ANALOG SWITCH

COM_, NO_ Analog Signal
Range

Small-Signal Switch
On-Resistance

Small-Signal Switch
On-Resistance Matching

Large-Signal Switch
On-Resistance

Shunt Resistance R

Switch-Off Leakage

V

COM_

V

NO_

R

ONS

∆R

ONS

R

ONL

INT

I

COM_(OFF

I

NO_(OFF

,

(Note 3) V

I

VPP = +40V, VNN = -160V,

= 0V

V

COM_

VPP = +100V, V
V

= 0V

COM_

VPP = +160V, V
V

= 0V

COM_

NN

NN

= -100V,

= -40V,

VPP = +100V, VNN = -100V, V
I

= 5mA

COM_

V

= VPP - 10V, I

COM_

COM_

COM_

I

C OM _

I

COM_

I

C OM _

I

COM_

I

C OM _

COM_

= 1A 15 Ω

N O_ or C OM _ t o GN D ( M AX14803/M AX 14803A),
switch off

V

, V

COM_

= +100V or unconnected 0 2 µA

NO_

Switch-Off DC Offset RL = 100kΩ -30 +30 mV

Switch-Output Peak
Current

Switch-Output COM_
Isolation Diode Current

100ns pulse width, 0.1% duty cycle (Note 4) 3 A

300ns pulse width, 2% duty cycle (Note 4) 500 mA

= 50kHz 4

= 50kHz 3.4 6

= 50kHz 8

= 5mA 0 10 µA

= 50kHz 5

= 50kHz 2.3 4

= 50kHz 3

m i n of ( V

N N

NN

+ 200V)
or (V

PP

-

10V)

= 5mA 26 48

= 200m A2232

= 5mA 22 30

= 200m A1827

= 5mA 20 30

= 200m A1627

= 0V,

5%

30 40 50 KΩ

mA

mA

V

Ω

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +2.7V to +5.5V, VPP= +40V to VNN+ 250V, VNN= -40V to -160V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values

are at T

A

= +25°C.) (Note 2)

),

)

)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SWITCH DYNAMIC CHARACTERISTICS

V

= +100V, RL = 10kΩ,

Turn-On Time t

Turn-Off Time t

Output Switching
Frequency

Maximum V

COM_

, V

NO_

Slew Rate

Off-Isolation V

Crosstalk V

COM_, NO_ Off­Capacitance

COM_ On-Capacitance C

C

COM_(OFF

C

NO_(OFF

COM_(ON

Output-Voltage Spike V

Small-Signal Analog
Bandwidth

ON

OFF

f

SW

dV/dt (Note 4) 20 V/ns

ISO

CT

SPK

f

BW

NO_

V

= -100V

NN

V

= +100V, RL = 10kΩ,

NO_

= -100V

V

NN

Duty cycle = 50% 50 kHz

f = 5MHz, RL = 1kΩ, CL = 15pF -50

f = 5MHz, RL = 50Ω -77

f = 5MHz, RL = 50Ω -80 dB

V

= 0V, V

COM_

V

= 0V, f = 1MHz (Note 4) 20 36 56 pF

COM_

= 0V, f = 1MHz (Note 4) 4 11 18 pF

NO_

RL = 50_ (Note 4) -150 +150 mV

VPP = +100V, VNN = -100V, CL = 200pF 20 MHz

VPP = +40V, VNN = -160V, V

VPP = +100V, VNN = -100V, V

= +160V, VNN = -40V, V

V

PP

COM_

COM_

COM_

LOGIC LEVELS

Logic-Input Low Voltage V

Logic-Input High Voltage V

Logic-Output Low Voltage V

Logic-Output High Voltage V

Logic-Input Capacitance C

Logic-Input Leakage I

IL

IH

OL

OH

IN

IN

I

= 1mA 0.4 V

SINK

I

SOURCE

= 0.75mA

(Note 4) 10 pF

= 0V 820

= 0V 600Charge Injection Q

= 0V 350

2 3.5 µs

2 3.5 µs

dB

pC

0.75 V

VDD -

0.75

V

DD

0.5

-

V

V

-1 +1 µA

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,

High-Voltage Analog Switches

_______________________________________________________________________________________ 5

TIMING CHARACTERISTICS

(VDD= +2.7V to +5.5V, VPP= +40V to VNN+ 200V, VNN= -40V to -160V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values

are at T

A

= +25°C.) (Note 2)

Note 2: All devices are 100% tested at TA= +70°C. Limits over the operating temperature range are guaranteed by design and

characterization.

Note 3: The analog signal input V

COM_

and V

NO_

must satisfy VNN≤ (V

COM_

, V

NO_

) ≤ VPP, or remain unconnected during power-up

and power-down.

Note 4: Guaranteed by characterization; not production tested.

LOGIC TIMING (Figure 1)

CLK Frequency f

DIN to CLK Setup Time t

DIN to CLK Hold Time t

CLK to LE Setup Time t

LE Low-Pulse Width t

CLR High-Pulse Width t

CLK Rise and Fall Times tR, t

CLK to DOUT Delay t

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

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

VDD = +5V ±10% 50

F

VDD = +3V ±10% 50

VDD = +5V ±10% 6 42

VDD = +3V ±10% 12 80

CLK

DS

DH

CS

WL

WC

DO

MHz

ns

ns

ns

ns

ns

ns

ns

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches

6 _______________________________________________________________________________________

Test Circuits

V

- 10V

PP

R

L

+5V

+5V

V

OUT

V

100kΩ

V

V

= 10V

OUT

AT 5MHz

50Ω

V

V

NN

+100V

PP

NN

-100V

P-P

PP

V

+100V

-100V

V

OUT

+100V

V

V

NN

= 10V

OUT

AT 5MHz

R

L

V

V

NN

I

SOL

PP

-100V

PP

NO_

COM_

V

PP

V

NN

SWITCH OFF LEAKAGE

P-P

NO_

COM_

V

PP

V

NN

MAX14802
MAX14803

MAX14803A

MAX14802
MAX14803

MAX14803A

V

GND

V

GND

V

OUT

R

100kΩ

NO_

COM_

L

MAX14802
MAX14803

V

+5V

DD

PP

V

NN

V

PP

V

NN

MAX14803A

V

GND

DD

DC OFFSET ON/OFF

V

PP

COM_

V

OUT

I

ID

V

NN

NO_

MAX14802
MAX14803

V

+5V

DD

V

PP

V

NN

V

V

PP

NN

NN

MAX14803A

V

GND

DD

NO_

COM_

V

PP

V

NN

tON/t

NO_

COM_

V

PP

V

NN

MAX14802
MAX14803

MAX14803A

TEST CIRCUIT

OFF

MAX14802
MAX14803

MAX14803A

V

GND

NO_

COM_

V

GND

DD

DD

+5V

50Ω

+5V

V

V

ISO

= 20LOG

OUT

VIN

ISOLATION DIODE CURRENT

OFF ISOLATION

+V

+5V

SPK

V

OUT

-V

SPK

50Ω

1kΩ

NO_

COM_

R

L

MAX14802
MAX14803

V

PP

V

NN

V

PP

V

NN

MAX14803A

OUTPUT-VOLTAGE SPIKE

V

V

OUT

V

COM_

OUT

V

V

PP

NN

100pF

NO_

COM_

MAX14803A

V

PP

V

NN

Q = 1000pF x V

MAX14802
MAX14803

OUT

V

GND

DD

CHARGE INJECTION

VCT = 20LOG

CROSSTALK

V

DD

GND

+5V

V

OUT

VIN

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,

High-Voltage Analog Switches

_______________________________________________________________________________________

7

)

SUPPLY

CURRENT

(

A)

Typical Operating Characteristics

(VDD= +3V, VPP= +100V, VNN= -100V, TA= +25°C, unless otherwise noted.)

ON-RESISTANCE vs.

ANALOG SIGNAL VOLTAGE

MAX14800 toc01

160

140

120

100

80

60

ON-RESISTANCE (Ω)

40

20

0

-100 100

180

160

140

120

100

80

VPP = +40V, VNN = -160V

60

ON-RESISTANCE (Ω)

40

20

0

-150 150

VPP = +160V, VNN = -40V

VPP = +100V, VNN = -100V

V

(V)

COM_

100500-50-100

LEAKAGE CURRENT vs. TEMPERATURE

5.0
I

(V

COM_(ON)

4.5

4.0

3.5

3.0

LEAKAGE CURRENT (nA)

2.5

I

COM_(OFF)

2.0

070

= +90V)

COM_

I

COM_(ON)

I

(V

COM_(ON)

I

COM_(OFF)

(V

COM_

I

COM_(OFF)

(V

COM_

= +90V)

COM_

TEMPERATURE (°C)

(V

= -90V)

COM_

= 0V)

(V

COM_

= 0V)

4020 6010 5030

MAX14800 toc05

= -90V)

0

-20

-40

OFF-ISOLATION (dB)

-60

-80

0.001 100

ON-RESISTANCE vs.

ANALOG SIGNAL VOLTAGE

VPP = +100V, VNN = -100V

TA = +70°C

TA = +25°C

-50 0 50
V

(V)

COM_

OFF-ISOLATION vs. FREQUENCY

TA = +70°C

TA = +25°C

TA = 0°C

FREQUENCY (MHz

TA = 0°C

100.01 10.1

MAX14800 toc02

MAX14800 toc04

TURN-ON/TURN-OFF TIME vs.

ANALOG SIGNAL VOLTAGE

5

4

3

t

OFF

2

TURN-ON/TURN-OFF TIME (µs)

1

t

0

-90 90

ON

V

(V)

NO_

LOGIC SUPPLY CURRENT vs.

SUPPLY VOLTAGE

0.8

0.7

0.6

0.5

TA = +70°C

0.4

0.3

SUPPLY CURRENT (µA)

DDQ

0.2

I

TA = 0°C

0.1

0

2.7 5.5

TA = +25°C

VDD SUPPLY VOLTAGE (V)

MAX14800 toc03

60300-60 -30

MAX14800 toc06

4.7 5.14.33.1 3.5 3.9

HIGH-VOLTAGE SUPPLY CURRENT vs.

TEMPERATURE

0.20
VPP = +100V

= -100V

V

NN

0.15

µ

0.10

0.05

0

070

I

PP

I

NN

3010 6020 40 50

TEMPERATURE (°C)

MAX14800 toc07

250

200

150

100

SUPPLY CURRENT (µA)

DD

I

50

LOGIC SUPPLY CURRENT vs.

SERIAL-CLOCK FREQUENCY

0

010

CLK SERIAL-CLOCK FREQUENCY (MHz)

TA = +70°C

TA = +25°C

TA = 0°C

HIGH-VOLTAGE SUPPLY CURRENT vs.

SWITCHING FREQUENCY

8

ALL SWITCHES SWITCHING

= +25°C

T

MAX14800 toc08

8264

A

6

4

SUPPLY CURRENT (mA)

2

0

050

SWITCHING FREQUENCY (kHz)

I

PP

I

NN

4010 3020

MAX14800 toc09

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches

8 _______________________________________________________________________________________

Pin Description

PIN

TQF P WLP

A1, A3, A5, A8, A9,

A11, B1–B5, B10,

B11, C1, C3, C5,
C6, C7, C9, C11,
D2, D4–D8, D10,

1, 2, 14, 16, 24, 35,

36

3 J2 COM4 Analog Switch 4—Common Terminal

4 H1 NO4 Analog Switch 4—Normally-Open Terminal

5 F3 NO3 Analog Switch 3—Normal ly-Open Terminal

6 F1 COM3 Analog Switch 3—Common Terminal

7 G2 NO2 Analog Switch 2—Normal ly-Open Terminal

8 E2 COM2 Analog Switch 2—Common Terminal

9 D3 COM1 Analog Switch 1—Common Terminal

10 D1 NO1 Analog Switch 1—Normally-Open Terminal

11 C2 NO0 Analog Switch 0—Normally-Open Terminal

12 C4 COM0 Analog Switch 0—Common Termina l

13 A4 V

15 A2 V

17 B6 GND Ground

18 A10 V

19 B7 DIN Serial-Data Input

20 A6 CLK Serial-Clock Input
21 B8 LE Active-Low, Latch-Enable Input

22 B9 CLR Latch Clear Input

23 A7 DOUT Serial-Data Output

25 C8 COM15 Analog Switch 15—Common Terminal

26 C10 NO15 Analog Switch 15—Normal ly-Open Terminal

27 D11 NO14 Analog Switch 14—Normal ly-Open Terminal

28 D9 COM14 Analog Switch 14—Common Terminal

29 E10 COM13 Analog Switch 13—Common Terminal

30 G10 NO13 Analog Switch 13—Normally-Open Terminal

31 F11 COM12 Analog Switch 12—Common Terminal

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

NAME FUNCTION

N.C. No Connection. Not internally connected.

Negative High-Voltage Supply. Bypass VNN to GND with a 0.1µF or greater

NN

ceramic capacitor.

Positive High-Voltage Supply. Bypa ss VPP to GND with a 0.1µF or greater

PP

ceramic capacitor.

Digital Supply Voltage. Bypass VDD to GND with a 0.1µF or greater ceramic

DD

capacitor.

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,

High-Voltage Analog Switches

_______________________________________________________________________________________ 9

Pin Description (continued)

Figure 1. Serial Interface Timing

PIN

TQF P WLP

32 F9 NO12 Analog Switch 12—Normal ly-Open Terminal

33 H11 NO11 Analog Switch 11—Normal ly-Open Terminal

34 J10 COM11 Analog Switch 11—Common Terminal

37 H9 COM10 Analog Switch 10—Common Terminal

38 K9 NO10 Analog Switch 10—Normal ly-Open Terminal

39 J8 COM9 Analog Switch 9—Common Terminal

40 G8 NO9 Analog Switch 9—Normally-Open Terminal

41 H7 COM8 Analog Switch 8—Common Termina l

42 K7 NO8 Analog Switch 8—Normal ly-Open Terminal

43 K5 NO7 Analog Switch 7—Normal ly-Open Terminal

44 H5 COM7 Analog Switch 7—Common Termina l

45 G4 NO6 Analog Switch 6—Normally-Open Terminal

46 J4 COM6 Analog Switch 6—Common Terminal

47 K3 NO5 Analog Switch 5—Normal ly-Open Terminal

48 H3 COM5 Analog Switch 5—Common Termina l

NAME FUNCTION

DIN D

LE

CLK

DOUT

OFF

SWITCH

ON

CLR

N+1

50%

50% 50%

t

DS

50%50%

t

WC

D

N

50%

50%

t

WL

t

CS

50%

t

DH

t

DO

50%

t

OFF

90%

10%

D

N-1

t

ON

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches

10 ______________________________________________________________________________________

Detailed Description

The MAX14802/MAX14803/MAX14803A provide high­voltage switching on 16 channels for ultrasound 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 16­bit 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 MAX14802/MAX14803/MAX14803A operate with a
wide range of high-voltage supplies including: VPP/V

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 VDDsupply voltage. The MAX14803/MAX14803A
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 overvolt­age protection against positive overshoot.

Analog Switch

The MAX14802/MAX14803/MAX14803A allow a peak-to­peak analog signal range from VNNto the minimum of
either VNN+ 200V or (VPP- 10V). Analog switch inputs
must be unconnected, or satisfy VNN≤ (V

COM_

, V

NO_

) ≤

VPPduring power-up and power-down.

High-Voltage Supplies

The MAX14802/MAX14803/MAX14803A allow a wide
range of high-voltage supplies. The devices operate
with VNNfrom -160V to 0 and VPPfrom +40V to VNN+
250V. When VNNis connected to GND (single-supply
applications), the devices operate with V

PP

up to
+200V. The VPPand VNNhigh-voltage supplies are not
required to be symmetrical, but the voltage difference
(VPP- VNN) must not exceed 250V.

Bleed Resistors (MAX14803/MAX14803A)

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.

Overvoltage Protection

The MAX14802/MAX14803/MAX14803A feature clamp­ing diodes (at the COM_). These clamping diodes pro­vide 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).

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 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.

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.

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,

High-Voltage Analog Switches

______________________________________________________________________________________ 11

CLK

Figure 2. Latch Enable Interface Timing

Table 1. Serial Interface Programming (Notes 5–10)

LE

DIN

DOUT

D15

MSB

D15

D14

D14

D13

D13

DATA FROM PREVIOUS DATA BYTE

POWER-UP DEFAULT: D15–D0 = 0

D1 D0

LSB

D1 D0

D15

DATA BITS

D0

(LSB)

D1 D2 D3 D4 D5 D6 D7 LE CLR SW0 SW1 SW2 SW3 SW4 SW5 SW6 SW7

L L L OFF

HLLON

L L L OFF

HLLON

L L L OFF

HLLON

L L L OFF

HLLON

L L L OFF

HLL ON

L L L OFF

HLL ON

L L L OFF

HLL ON

X X X X X X X X H L HOLD PREVIOUS STATE

X X X X X X X X X H OFF OFF OFF OFF OFF OFF OFF OFF

CONTROL

BITS

L L L OFF

HLL ON

FUNCTION

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches

12 ______________________________________________________________________________________

Table 1. Serial Interface Programming (Notes 5–10) (continued)

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.

DATA BITS

D8 D9 D10 D11 D12 D13 D14

L L L OFF

HLLON

L L L OFF

HLLON

L L L OFF

HLLON

L L L OFF

HLLON

L L L OFF

HLL ON

L L L OFF

HLL ON

X X X X X X X X H L HOLD PREVIOUS STATE

X X X X X X X X X H OFF OFF OFF OFF OFF OFF OFF OFF

(MSB)

L L L OFF

HLL ON

CONTROL

BITS

D15

LE CLR SW8 SW9 SW10 SW11 SW12 SW13 SW14 SW15

L L L OFF

HLL ON

FUNCTION

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,

High-Voltage Analog Switches

______________________________________________________________________________________ 13

Applications Information

For medical ultrasound applications, see Figures 4, 5,
and 6.

Logic Levels

The MAX14802/MAX14803/MAX14803A digital inter­face inputs CLK, DIN, LE, and CLR operate on the V

DD

supply voltage.

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,

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 can be included anywhere in series with the
MAX14802/MAX14803/MAX14803A data chain.

Supply Sequencing and Bypassing

The MAX14802/MAX14803/MAX14803A do not require
special sequencing of the VDD, VPP, and VNNsupply
voltages; however, analog switch inputs must be
unconnected, or satisfy VNN≤ (V

COM_

, V

NO_

) ≤ V

PP

during power-up and power-down. Bypass VDD, VPP,
and VNNto GND with a 0.1µF ceramic capacitor as
close as possible to the device.

Application Diagrams

MAX14802
MAX14803

MAX14803A

MAX14802
MAX14803

MAX14803A

MAX14802
MAX14803

MAX14803A

MAX14802
MAX14803

MAX14803A

MAX14802
MAX14803

MAX14803A

MAX14802
MAX14803

MAX14803A

CLK

DIN

CLK

LE

CLR

U10

U11

U1n

U20

U21

U2n

DOUT

DIN1

LE

CLR

DIN2

DIN

CLK

LE

CLR

DOUT

DIN

CLK

LE

CLR

DOUT

DIN

CLK

LE

CLR

DOUT

DIN

CLK

LE

CLR

DOUT

DIN

CLK

LE

CLR

DOUT

Figure 3. Interfacing Multiple Devices by Daisy-Chaining

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches

14 ______________________________________________________________________________________

Figure 4. Medical Ultrasound Application—High-Voltage Analog Switches in Probe

HIGH-VOLTAGE TRANSMIT

1 PER CHANNEL

±100V MAX

LOW-VOLTAGE RECEIVE

64 TO 128 CHANNELS

±1V MAX

+V

10mA TYP

HIGH­VOLTAGE
ISOLATION

MAINFRAME

PROBE SELECTION

2 TO 4 PROBES

RELAY

1 RELAY/CH/PROBE

PROBE

A

PROBE

B

PROBE

C

CABLE

1 PER CHANNEL

±1 TO 2A MAX

PROBES

TRANSDUCERS

2 TO 4 PER CHANNEL

HV ANALOG

SWITCHES

2 TO 4 PER CHANNEL

-V

PROBE

D

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,

High-Voltage Analog Switches

______________________________________________________________________________________ 15

Figure 5. Medical Ultrasound Application—High-Voltage Analog Switches in Mainframe

HV TRANSMIT

1 PER CHANNEL

LV RECEIVE

64 TO 128 CHANNELS

±100V MAX

±1V MAX

+V

-V

10mA TYP

HIGH­VOLTAGE
ISOLATION

MAINFRAME

HV ANALOG

SWITCHES

2 TO 4 PER CHANNEL

PROBE SELECTION

2 TO 4 PROBES

RELAYS

2 TO 4 RELAYS/CH/PROBE

CABLE

2 TO 4 PER CHANNEL

±1 TO 2A MAX

PROBE

A

PROBE

B

PROBE

C

PROBES

TRANSDUCERS

2 TO 4 PER CHANNEL

PROBE

D

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches

16 ______________________________________________________________________________________

Figure 6. Medical Ultrasound Application—Multiple Transmit and Isolation per Receiver Channel

MAINFRAME

HIGH-VOLTAGE TRANSMIT

2 TO 4 PER CHANNEL

±100V MAX

LOW-VOLTAGE RECEIVE

64 TO 128 CHANNELS

±1V MAX

+V

-V

+V

-V

+V

-V

+V

-V

+V

-V

10mA TYP

PROBE SELECTION

2 TO 4 PROBES

RELAYS

2 TO 4 RELAYS/CH/PROBE

CABLE

2 TO 4 PER CHANNEL

±1 TO 2A MAX

PROBE

A

PROBE

B

PROBE

C

PROBES

TRANSDUCERS

2 TO 4 PER CHANNEL

+V

-V

+V

-V

+V

-V

HIGH-VOLTAGE
ISOLATION AND
CHANNEL SELECT
2 TO 4 PER CHANNEL

PROBE

D

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,

High-Voltage Analog Switches

______________________________________________________________________________________ 17

Functional Diagram

CLR

DIN

CLK

DOUT

V

DD

LATCH

16-BIT

SHIFT

REGISTER

LATCH

LE

MAX14802
MAX14803

MAX14803A

V

PP

LEVEL

SHIFTER

LEVEL

SHIFTER

V

PP

COM0

*

V

*

NN

V

NN

V

PP

NO0

COM15

*

V

NN

NO15

*

V

NN

GND V

*BLEED RESISTORS AVAILABLE ON THE MAX14803/MAX14803A ONLY.

NN

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches

18 ______________________________________________________________________________________

Pin Configurations

TOP VIEW

COM10

NO10

COM9

NO9

COM8

NO8

NO7

COM7

NO6

COM6

NO5

COM5

N.C.

COM11

N.C.

35

34 33 32 31 30 29 28 27

36

37

38

39

40

41

42

43

44

45

46

47

48

+

2

3456789101112

1

N.C.

N.C.

COM4

NO11

NO4

COM12

NO12

MAX14802
MAX14803

NO3

COM3

NO13

NO2

COM13

COM2

COM14

COM1

NO14

NO1

26

NO15

NO0

25

COM15

COM0

N.C.

24

DOUT

23

22

CLR

21

LE

CLK

20

DIN

19

18

V

DD

17

GND

16

N.C.

V

15

PP

N.C.

14

13

V

NN

TQFP

(7mm x 7mm)

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,

High-Voltage Analog Switches

______________________________________________________________________________________ 19

Chip Information

PROCESS: BiCMOS

Pin Configurations (continued)

PACKAGE

TYPE

PACKAGE

CODE

OUTLINE

NO.

LAND

PATTERN NO.

48 TQFP C48+6

21-0054 90-0093

110 WLP W1105B5+1

21-0494

Refer to

Application

Note 1891

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.

TOP VIEW

(BUMPS ON BOTTOM)

+

A

B

C

D

E

F

G

H

J

K

1

N.C.

N.C.

N.C.

NO1

N.C.

COM3

N.C.

NO4

N.C.

N.C.

MAX14803A

234567891011

V

N.C.

V

N.C.

CLK

DOUT

N.C.

N.C.

V

PP

N.C.

NO0

N.C.

COM2

N.C.

NO2

N.C.

COM4

N.C.

N.C.

N.C.

COM1

N.C.

NO3

N.C.

COM5

N.C.

NO5

NN

N.C.

COM0

N.C.

N.C.

N.C.

NO6

N.C.

COM6

N.C.

N.C.

N.C.

N.C.

N.C.

N.C.

N.C.

COM7

N.C.

NO7

GND

N.C.

N.C.

N.C.

N.C.

N.C.

N.C.

N.C.

N.C.

DIN

N.C.

N.C.

N.C.

N.C.

N.C.

COM8

N.C.

NO8

LE

COM15

N.C.

N.C.

N.C.

NO9

N.C.

COM9

N.C.

CLR

N.C.

COM14

N.C.

NO12

N.C.

COM10

N.C.

NO10

COM13

COM11

DD

N.C.

NO15

N.C.

N.C.

NO13

N.C.

N.C.

N.C.

N.C.

N.C.

NO14

N.C.

COM12

N.C.

NO11

N.C.

N.C.

0.31 mm

0.5 mm

(5.81mm x 5.43mm)

WLP

0.5 mm

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches

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.

20

____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

Revision History

REVISION

NUMBER

0 4/09 Init ial release —

1 9/09

2 11/10

3 8/11 Added extended temperature information; added MAX14802ECM+ to data sheet 1

REVISION

DATE

DESCRIPTION

Corrected two specifications in the Absolute Maximum Ratings section,
changed the minimum of the peak-to-peak analog signal range to “either VNN + 200V

– 10V)”

or (V

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

PAGES

CHANGED

2, 9

1–19