MAX4968,MAX4968 pdf中文资料,MAX4968引脚图,MAX4968电路-Datasheet-电子工程世界

19-5786; Rev 2; 1/12

16-Channel, Linear, High-Voltage

Analog Switches

General Description

The MAX4968/MAX4968A are 16-channel, high-linearity,

high-voltage, bidirectional SPST analog switches with

18I (typ) on-resistance. The devices are ideal for use in

applications requiring high-voltage switching controlled

by a low-voltage control signal, such as ultrasound imag-

ing and printers. The MAX4968A provides integrated

40kI (typ) bleed resistors on each switch terminal to

discharge capacitive loads. Using HVCMOS technol-

ogy, these switches combine high-voltage bilateral MOS

switches and low-power CMOS logic to provide efficient

control of high-voltage analog signals.

The MAX4968 is pin-to-pin compatible with the MAX14802

and Supertex HV2601. The MAX4968A is pin-to-pin

compatible with the MAX14803 and Supertex HV2701.

The only difference is the V

PP

positive supply voltage

level. The MAX4968/MAX4968A require a low +10V (typ)

voltage (V

PP

), whereas the MAX14802/MAX14803 and

HV2601/HV2701 require a high +100V supply voltage.

In a typical ultrasound application, these devices do not

require a dedicated high-voltage supply that implies a sig-

nificant simplification of system requirement. The negative

voltage supply can be shared with the transmitter, and the

positive voltage supply is typically +10V.

The devices are available in the 48-pin LQFP package

and are specified over the -40NC to +85NC extended

temperature range.

Features

S

Latch Free

SOI HVCMOS Process Technology for High

Performance and Robustness

S

No Dedicated High-Voltage Supplies Required

S

R

ON

Flatness Guaranteed in Entire Input Range

S

Low-Power Dissipation

S

Low-Charge Injection and Voltage Spike

S

25MHz Serial Interface (+2.5V to +5V)

S

2nd Harmonic Distortion < -45dB at 2MHz ± 90V

Pulse

S

Low Parasitic Capacitance Guarantees High

Bandwidth

S

DC to 30MHz Small-Signal Analog Bandwidth

(C

LOAD

= 200pF)

S

500kHz to 20MHz High-Signal Analog Bandwidth

(C

LOAD

= 200pF)

S

Extended Input Range Up to 210V

P-P

S

-80dB (typ) Off-Isolation at 5MHz (50I)

S

Shunt (Bleed) Resistors on Outputs (MAX4968A

Only)

S

Daisy-Chainable Serial Interface

MAX4968/MAX4968A

Applications

Medical Ultrasound Imaging

Nondestructive Testing (NDT)/Industrial

Ultrasound Imaging

Printers

PART

MAX4968ECM+

MAX4968AECM+

TEMP RANGE

-40°C to +85°C

Ordering Information/Selector Guide

SWITCH CHANNELS

16

BLEED RESISTOR

No

Yes

PIN-PACKAGE

48 LQFP

+Denotes

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

_______________________________________________________________

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.

16-Channel, Linear, High-Voltage

Analog Switches

MAX4968/MAX4968A

ABSOLUTE MAXIMUM RATINGS

(All voltages referenced to GND.)

V

DD

Logic Supply Voltage Range ..........................-0.3V to +6V

V

PP

- V

NN

Supply Voltage ................................................ +212V

V

PP

Supply Voltage Range ...................................-0.3V to +12V

V

NN

Negative Supply Voltage ............................................-200V

Logic Input Voltage Range (CLK, DIN, CLR) .........-0.3V to +6V

Logic Input Voltage Range

(LE) ........................-0.3V to a minimum of (V

PP

+ 0.3V) or 6V

Logic Output Voltage Range (DOUT) ...... -0.3V to (V

DD

+ 0.3V)

Analog Signal Range (SW_) ........ (V

NN

- 0.3V) to (V

NN

+ 220V)

Continuous Power Dissipation (T

A

= +70NC)

LQFP (derate 22.7mW/NC above +70NC) .................1818mW

Operating Temperature Range .......................... -40NC to +85NC

Storage Temperature Range............................ -65NC to +150NC

Junction Temperature ................................................... +150NC

Lead Temperature (soldering, 10s) ................................+300NC

Soldering Temperature (reflow) ......................................+260NC

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.

PACKAGE THERMAL CHARACTERISTICS (Note 1)

LQFP

Junction-to-Ambient Thermal Resistance (q

JA

) ..........44°C/W

Junction-to-Case Thermal Resistance (q

JC

) ...............10°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.maxim-ic.com/thermal-tutorial.

ELECTRICAL CHARACTERISTICS

(V

DD

= +2.37V to +5.5V, V

PP

= +10V

Q5%,

V

NN

= 0 to -200V, T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are

V

DD

= +3.3V, V

NN

= -100V, V

PP

= +10V at T

A

= +25NC.) (Note 2)

PARAMETER

POWER SUPPLIES

V

DD

Logic Supply Voltage

V

NN

Supply Voltage

V

PP

Supply Voltage

V

DD

Static Current

V

DD

Dynamic Current

V

NN

Static Current

V

NN

Supply Dynamic Current

(All Channels Switching

Simultaneously)

V

PP

Supply Static Current

V

PP

Supply Dynamic Current

(All Channels Switching

Simultaneously)

SWITCH CHARACTERISTICS

Analog Dynamic Signal Range

Small-Signal On-Resistance

V

SW_

R

ONS

AC operation only, f > 500kHz

V

PP

= +10V, V

NN

= -100V, V

SW_

= 0V,

I

SW_

= 5mA

V

NN

18

V

NN

+

210

34

V

I

V

DD

V

NN

V

PP

I

DDS

I

DD

I

NNS

I

NN

I

PPS

I

PP

V

DD

= +5V, f

CLK

= 5MHz, f

DIN

= 2.5MHz

All switches remain on or off, SW_ = GND

V

PP

= +10V, V

NN

= -100V,

f

TURN_ON/OFF

= 50kHz, SW_ = GND

All switches remain on or off, SW_ = GND

V

PP

= +10V, V

NN

= -100V,

f

TURN_ON/OFF

= 50kHz, SW_ = GND

10

3.3

12

4

+2.37

-200

+9.5

+10

+5.5

0

+10.5

4

200

25

5

25

6

V

FA

mA

FA

mA

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

2

16-Channel, Linear, High-Voltage

Analog Switches

ELECTRICAL CHARACTERISTICS (continued)

(V

DD

= +2.37V to +5.5V, V

PP

= +10V

Q5%,

V

NN

= 0 to -200V, T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are

V

DD

= +3.3V, V

NN

= -100V, V

PP

= +10V at T

A

= +25NC.) (Note 2)

PARAMETER

Small-Signal On-Resistance

Matching

Small-Signal On-Resistance

Flatness

Switch Output Bleed Resistor

Switch-Off Leakage

Switch-Off DC Offset

Switch-On DC Offset

Switch Output Isolation Diode

Current

SWITCH DYNAMIC CHARACTERISITICS

Turn-On Time

Turn-Off Time

Maximum V

SW_

Slew Rate

Off-Isolation

Crosstalk

SW_ Off-Capacitance

SW_ On-Capacitance

Output Voltage Spike

Large-Signal Analog Bandwidth

(-3dB)

Small-Signal Analog Bandwidth

(-3dB)

Charge Injection

LOGIC LEVELS

Logic-Input Low Voltage

Logic-Input High Voltage

Logic-Output Low Voltage

Logic-Output High Voltage

Logic-Input Capacitance

Logic-Input Leakage

V

IL

V

IH

V

OL

V

OH

C

IN

I

IN

-1

I

SINK

= 1mA

I

SOURCE

= 1mA

V

DD

-

0.4

5

+1

V

DD

-

0.75

0.4

0.75

V

pF

FA

t

ON

t

OFF

dV/dt

V

ISO

V

CT

V

SW_A

= +1V, R

L

= 100I, V

NN

= -100V,

from enable to V

SW_B

= +0.9V

V

SW_A

= +1V, R

L

= 100I, V

NN

= -100V,

from disable to V

SW_B

= +0.9V

C

L

= 100pF

f = 2MHz, R

L

= 50I

f = 5MHz, R

L

= 50I

20

-76

9

13

±70

30

50

150

2

5

3.5

Fs

V/ns

dB

pF

mV

MHz

pC

SYMBOL

DR

ONS

CONDITIONS

V

PP

= +10V, V

NN

= -100V, I

SW_

= 5mA

AC measured, f

SW_

= 0.5MHz,

V

SW_

= 80V

P-P

, R

LOAD

= 50I, V

PP

= +10V,

V

NN

= -100V

MAX4968A only

V

SW_

= 0V, switch off (MAX4968 only)

No load (MAX4968A only)

300ns pulse width, 2% duty cycle

-15

30

MIN

TYP

3

MAX

UNITS

%

MAX4968/MAX4968A

R

ONF

R

INT

I

SW_(OFF)

2

40

0

3.0

50

1

+15

%

kI

FA

mV

A

C

SW_(OFF)

f = 1MHz, small signal close to zero

C

SW_ (ON)

f = 1MHz, small signal close to zero

V

SPK

f

BW_L

f

BW_S

Q

R

L

= 50I

C

LOAD

= 200pF, 60V amplitude sinusoidal

burst, 1% duty cycle

C

LOAD

= 200pF, 100mV amplitude

sinusoidal

V

PP

= +10V, V

NN

= -100V, Figure 1

3

16-Channel, Linear, High-Voltage

Analog Switches

MAX4968/MAX4968A

ELECTRICAL CHARACTERISTICS (continued)

(V

DD

= +2.37V to +5.5V, V

PP

= +10V

Q5%,

V

NN

= 0 to -200V, T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are

V

DD

= +3.3V, V

NN

= -100V, V

PP

= +10V at T

A

= +25NC.) (Note 2)

PARAMETER

CLK Frequency

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

SYMBOL

f

CLK

t

DS

t

DH

t

CS

t

WL

t

WC

t

R

, t

F

t

DO

V

DD

= +5V

Q10%,

C

DOUT

= 15pF

V

DD

= +2.5V

Q5%,

C

DOUT

= 15pF

8

3

8

12

50

28

45

CONDITIONS

MIN

TYP

MAX

25

UNITS

MHz

ns

TIMING CHARACTERISTICS (Figure 2)

Note 2:

All devices are 100% tested at T

A

= +85NC. Limits over the operating temperature range are guaranteed by design.

4

16-Channel, Linear, High-Voltage

Analog Switches

Test Circuits/Timing Diagrams

V

PP

- 10V

MAX4968/MAX4968A

R

L

100kΩ

SW_A

I

LEAK

A

SW_B

I

LEAK

A

V

OUT

SW_A

SW_B

V

OUT

SW_A

SW_B

MAX4968

MAX4968A

V

PP

V

NN

V

PP

V

NN

V

DD

GND

5V

R

L

100kΩ

MAX4968

MAX4968A

V

PP

V

NN

V

PP

V

NN

V

DD

GND

5V

V

PP

V

NN

V

PP

V

NN

MAX4968

MAX4968A

V

DD

GND

5V

SWITCH-OFF LEAKAGE

V

IN

= 10V

P-P

AT 5MHz

SW_A

V

OUT

SW_B

V

OUT

SW_A

I

ID

SW_B

DC OFFSET ON/OFF

V

IN

= 10V

P-P

AT 5MHz

t

ON

/t

OFF

TEST CIRCUIT

SW_A

V

NN

SW_B

SW_A

50Ω

SW_B

R

L

MAX4968

MAX4968A

V

PP

V

NN

V

PP

V

NN

V

ISO

= 20log

V

DD

GND

V

OUT

V

IN

5V

V

PP

V

NN

V

PP

V

NN

50Ω

MAX4968

MAX4968A

V

DD

GND

5V

V

PP

V

NN

V

PP

V

NN

V

CT

= 20log

V

DD

GND

V

OUT

V

IN

5V

MAX4968

MAX4968A

ISOLATION DIODE

CURRENT

OFF-ISOLATION

CROSSTALK

V

OUT

V

OUT

100pF

V

COM_

+V

SPK

SW_A

-V

SPK

SW_B

V

OUT

SW_A

50Ω

SW_B

MAX4968

MAX4968A

V

PP

V

NN

V

PP

V

NN

V

DD

GND

5V

R

L

1kΩ

V

PP

V

NN

V

PP

V

NN

MAX4968

MAX4968A

V

DD

GND

5V

Q = 1000pF x V

OUT

CHARGE INJECTION

V

IN

10mV

P-P

SW_A

SW_B

V

OUT

200pF

60V

P-P

BURST

(1% DUTY CYCLE)

V

IN

OUTPUT VOLTAGE SPIKE

SW_A

SW_B

V

OUT

200pF

MAX4968

MAX4968A

MAX4968

MAX4968A

V

PP

V

NN

V

PP

V

NN

V

DD

GND

5V

V

PP

V

NN

V

PP

V

NN

V

DD

GND

5V

SMALL-SIGNAL

BANDWIDTH MEASUREMENT

LARGE-SIGNAL

BANDWIDTH MEASUREMENT

Figure 1. Test Circuits

5

MAX4968

MAX4968概述

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