MAXIM MAX14752, MAX14753 User Manual

General Description

The MAX14752/MAX14753 are 8-to-1 and dual 4-to-1 high-voltage analog multiplexers. Both devices feature 60Ω (typ) on-resistance with 0.03Ω (typ) on-resistance flatness. These low on-resistance multiplexers conduct equally well in either direction. Flexible logic levels for the channel-select interface are defined by the EN input.

The MAX14752 is a 8-to-1 multiplexer and MAX14753 is a dual 4-to-1 multiplexer. Both devices operate with dual supplies of ±10V to ±36V, or a single supply of +20V to +72V.

The MAX14752/MAX14753 are available in a 16-pin TSSOP package and are pin compatible with the industry-standard DG408/DG409. Both the MAX14752/ MAX14753 are specified over the extended -40°C to +85°C operating temperature range.

Applications

Programmable-Logic Controllers

Environment Control Systems

ATE Systems

Medical Monitoring Systems

Automotive

Features

♦ Wide Dual Power-Supply Range ±36V (max) ♦ Wide Single Power-Supply Range +72V (max) ♦ Low On-Resistance 60Ω (typ) ♦ R

ON

Flatness Over Common-Mode Voltage 0.03Ω

(typ)

♦ Low-Input (20nA) On-Leakage Current (max) ♦ EN Voltage Defines Logic Level of S0, S1, and S2 ♦ Low I

DD

Supply Current in Disable Mode 25µA (max)

♦ Overvoltage/Undervoltage Clamp Through

Protection Diodes

♦ Break-Before-Make Operation ♦ Pin Compatible with Industry-Standard

DG408/DG409

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

________________________________________________________________

Maxim Integrated Products

1

19-4255; Rev 3; 7/10

Ordering Information

+

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.maxim-ic.com.

Pin Configurations appear at end of data sheet.

Functional Diagrams

PART TEMP RANGE PIN-PACKAGE

MAX14752EUE+ -40°C to +85°C 16 TSSOP

MAX14753EUE+ -40°C to +85°C 16 TSSOP

MAX14752

V

SS

CONTROL

S1S0 S2

EN

IN0

IN1

IN2

IN3

IN4

IN5

IN6

IN7

V

DD

GND

OUT

INA0

INA1

INA2

INA3

INB0

INB1

INB2

INB3

V

DD

S1 S0

MAX14753

V

SS

OUTA

OUTB

CONTROL

GND

EN

MAX14752/MAX14753

8-Channel/Dual 4-Channel 72V Analog Multiplexers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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.

VDDto VSS.............................................................-0.3V to +72V

GND to V

SS

..............................................................-0.3V to V

DD

EN, S0, S1, S2 to GND .................................................................

..............................-0.3V to the lesser of (+12V and V

DD

+ 0.3V)

IN_, INA_, INB_, OUT, OUTA, OUTB to V

SS ......................................

...........

-2V to (V

DD

- V

SS

+ 2V) or 100mA (whichever occurs first)

Continuous Current into IN_, INA_,

INB_, OUT, OUTA, OUTB .............................................100mA

Continuous Power Dissipation (T

A

= +70°C)

16-Pin TSSOP (derate 11.1mW/°C above +70°C) ......890mW

Junction-to-Ambient Thermal Resistance (θ

JA

) (Note 1)

16-Pin TSSOP ..............................................................90°C/W

Junction-to-Case Thermal Resistance (θ

JC

) (Note 1)

16-Pin TSSOP ..............................................................27°C/W

Maximum Operating Temperature Range.........-40°C to +125°C

Junction Temperature..................................................... +150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Soldering Temperature (reflow) .......................................+260°C

DC ELECTRICAL CHARACTERISTICS–DUAL SUPPLIES

(VDD= +35V, VSS= -35V, V

GND

= 0V, VEN= +3.3V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

)

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

.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

POWER SUPPLY

VDD Supply Voltage Range V

VSS Supply Voltage Range V

VDD Supply Current

VSS Supply Current

ANALOG MUX

Analog Signal Range

Current Through Multiplexer

On-Resistance R

On-Resistance Matching Between Channels

On-Resistance Flatness R

Output On-Leakage Current I

DD

SS

I

DD(OFF)

I

DD(ON)

I

SS(OFF)

I

SS(ON)

, V

V

IN_

INA_,

V

, V

INB_

V

OUT,

OUTA, VOUTB

I

IN_, IINA_,

I

INB_

ON

ΔR

ON

FLAT_(ON

OUT(ON)

V

= V

E N

= 0V , V

S _

I N _ = V I N A _

= V

VEN = +5V, VS_ = 0V or VEN, V V

= +20V

INB_

V

= V

E N

= 0V , V

S _

I N _ = V I N A _

= V

VEN = +5V, VS_ = 0V or VEN, V

= +20V

V

INB_

V

, V

IN_

INA_

I

IN_, IINA_, IINB_

, V

V

OUT

OUTA

I

IN_, IINA_, IINB_

= ±20V -5 +5 mA

INB_

= 5mA; V

, V

OUTB

= 5mA, V

, V

IN_

= ±20V, Figure 1

, V

IN_

±20V, 0V

I

IN_, IINA_, IINB_

, V

V

OUT

MAX14752: V

, V

V

IN_

INA_

MAX14753: V

, V

V

IN_

INA_

OUTA

, V

OUT

INB_

OUT

INB_

= 5mA, V

OUTB

IN_

= ±20V

, V

OUTA

= unconnected, Figure 2

, V

OUTA

= unconnected, Figure 2

, V

OUTB

= + 20V 12 25

I N B _

IN_ = VINA_

= + 20V 11 25

I N B _

IN_ = VINA_

, V

INA_

INB_

, V

INA_

INB_

, V

INA_

INB_

= ±20V,

+10 +36 V

-10 -36 V

=

V

SS

,

=

,

-20 +20

-10 +10

270 600

260 600

V

DD

60 130 Ω

0.5 Ω

0.03 Ω

µA

V

nA

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS–DUAL SUPPLIES (continued)

(VDD= +35V, VSS= -35V, V

GND

= 0V, VEN= +3.3V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Output Off-Leakage Current I

Input Off-Leakage Current I

LOGIC (EN, S0, S1, S2)

EN Input Voltage Low V

EN Input Voltage High V

EN, S_ Input Voltage Range VEN, VS_ 11 V

EN Input Current I

S0, S1, S2 Input Voltage Low V

S0, S1, S2 Input Voltage High V

DYNAMIC CHARACTERISTICS

Enable Turn-On Time t

Enable Turn-Off Time t

Transition Time t

Break-Before-Make Time Delay t

Frequency Response BW RS = 50Ω, RL = 1kΩ, Figure 7 20 MHz

Off-Isolation V

Crosstalk V

Total Harmonic Distortion Plus Noise

Charge Injection Q

OUT(OFF)

IN(OFF)

EN_IL

EN_IH

EN_IH(DC)

IL

IH

ON

OFF

TRANS

BBM

ISO

CT

THD+N R

MAX14752: V

, V

V

IN_

INA_

MAX14753: V

, V

V

IN_

INA_

, V

V

OUT

OUTA

= ±20V, Figure 3

V

INB_

V

= + 11V , V

E N

or ( 0.75 x V

V

, V

IN0

INA0

V

, V

IN0

INA0

V

, V

IN0

INA0

V

, V

I N _

I N A _

Fi g ur e 6

V

, V

IN_

INA_

= 50Ω, CL = 15pF, Figure 8

R

L

RS = RL = 50Ω, Figure 9 62 dB

= RL = 1kΩ, f = 20Hz to 20kHz 0.0014 %

S

V

, V

IN_

INA_

Figure 10

, V

OUTB

= ±20V,

= ±40V,

, V

IN_

INA_

-20 +20

-10 +10

,

-5 +5 nA

OUT

, V

= -20V, Figure 3

INB_

, V

OUT

, V

= -40V, Figure 3

INB_

, V

OUTB

OUTA

= ±20V, V

0.8 V

2.1 V

= V

E N

S 0

S 1

= ( 0.25 x V

S 2

)

E N

)

0.4 mA

0.25 x V

EN

0.75 x V

EN

= ±10V, RL = 10kΩ, Figure 4 1 25 µs

= ±10V, RL = 10kΩ , Fi g ur e 4 0.8 2 µs

= ±10V, RL = 10kΩ , Fi g ur e 5 10 µs

, V

= ± 10V , RL = 10kΩ ,

I N B _

= 1V

, V

INB_

, V

= GND, CL = 1nF,

INB_

, f = 100kHz,

RMS

10 µs

65 dB

200 pC

nA

V

MAX14752/MAX14753

8-Channel/Dual 4-Channel 72V Analog Multiplexers

4 _______________________________________________________________________________________

DC ELECTRICAL CHARACTERISTICS–SINGLE SUPPLY

(VDD= +70V, VSS= V

GND

= 0V, VEN= +3.3V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)

Note 2: All parameters in single-supply operation are expected to be the same as in dual-supplies operation. Note 3: IN-OUT capacitances are negligible (< 1pF).

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

On-Resistance R

OUT, OUTA, OUTB Off-Leakage Current

On-Input Capacitance C

ON

I

= 5mA, V

IN_

V

INA_

,

V

OUTA

IN_

, V

= +20V (MAX14752),

, V

OUT

V

,

INB_

OUTB

(MAX14753), Figure 1

I

OUT(OFF)

I

OUTA(OFF

I

OUTB(OFF)

MAX14752: V

,

V

INB_

),

MAX14753: V V

INB_

= +10V, Figure 3

OUT

= +40V, V

MAX14752, VDD = +50V, OUT unconnected

IN_ON

MAX14753, VDD = +50V, OUTA, OUTB unconnected

MAX14752, VDD = +50V

Off-Input Capacitance C

Off-Output Capacitance C

IN_OFF

MAX14753, VDD = +50V

MAX14752, VDD = +50V

OUT_OFF

MAX14753, VDD = +50V

= +20V

= V

IN_

V

IN_

V

IN_

V

INA_ ,VINB_ =

=

INA_

= V

INA_

=

= 4V 43

= 25V 26

4V

V

INA_ ,VINB_ =

25V

V

= 4V 6

IN_

= 25V 3.7

V

IN_

V

INA_ ,VINB_ =

4V

V

INA_ ,VINB_ =

25V

V

= 4V 35

OUT_

= 25V 20

V

OUT_

V

OUTA_ ,

V

= 4V

OUTB_

V

OUTA_ ,

V

= 25V

OUTB_

60 130

20 +20

-10 +10

26

16

6

3.7

19

11

nA

pF

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

_______________________________________________________________________________________ 5

Test Circuits/Timing Diagrams/Truth Tables

Figure 1. On-Resistance

Figure 2. On-Leakage Current

Figure 3. Off-Leakage Current

V

DD

1µF

V

DD

MAX14752

GND

MAX14753

1µF

OUT OUTA OUTB

I

IN

V

SS

V

SS

UNCONNECTED

IN_ INA_ INB_

V

IN

IN_ INA_ INB_

GND

V

DD

V

DD

MAX14752 MAX14753

1μF

I

OUT(ON)

I

OUTA(ON)

OUT

I

OUTB(ON)

OUTA OUTB

A

V

OUT

V

SS

V

SS

I

IN(OFF)

I

INA(OFF)

I

INB(OFF)

V

IN

IN_ INA_ INB_

GND

V

DD

V

DD

MAX14752 MAX14753

1μF

I

OUT(OFF)

I

OUTA(OFF)

OUT

I

OUTB(OFF)

OUTA OUTB

AA

V

OUT

V

SS

V

SS

MAX14752/MAX14753

8-Channel/Dual 4-Channel 72V Analog Multiplexers

6 _______________________________________________________________________________________

Test Circuits/Timing Diagrams/Truth Tables (continued)

Figure 4. Enable Switching Time

+35V

V

GND

DD

MAX14752

+35V

V

DD

MAX14753

EN

S0

S1

S2

EN

S0

S1

V

SS

-35V

INA1–INA3 INB0–INB3

V

SS

IN0

IN1–IN7

OUT

INA0

OUTA

+10V

10kΩ50Ω

+10V

10kΩ50Ω

V

OUT

OUTA

+3.3V

EN

V

OUT

SWITCH OUTPUT

t

< 20ns

R

< 20ns

t

F

50%

0V

t

ON

, V

OUTA

0V

90%

10%

t

OFF

-35V

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

_______________________________________________________________________________________ 7

Test Circuits/Timing Diagrams/Truth Tables (continued)

Figure 5. Transition Time

Figure 6. Break-Before-Make Interval

+35V

V

GND

DD

MAX14752

+35V

V

DD

MAX14753

S2

S1

50Ω

+3.3V

50Ω

+3.3V V

S0

EN

S1

S0

EN

V

SS

-35V

INA1–INA2 INB0–INB3

V

SS

-35V

IN1–IN6

OUT

INA0

INA3

OUTA

IN0

IN7

+10V

10kΩ

+10V

10kΩ

V

OUT

OUTA

V

OUT

+3.3V

S_

, V

OUTA

SWITCH OUTPUT

tR < 20ns

< 20ns

t

F

50%

0V

90%

0V

t

TRANS

EN+3.3V

S0

S1

S2

50Ω

GND

+35V

V

DD

MAX14752

V

-35V

SS

IN0–IN7

OUT

+10V

10kΩ

< 20ns

t

R

< 20ns

t

80%

F

t

BBM

+3.3V

S_

0V

V

OUT

V

OUT

SWITCH OUTPUT

0V

50%

MAX14752/MAX14753

8-Channel/Dual 4-Channel 72V Analog Multiplexers

8 _______________________________________________________________________________________

Test Circuits/Timing Diagrams/Truth Tables (continued)

Figure 7. Frequency Response

Figure 8. Off-Isolation

Figure 9. Crosstalk

+35V

1µF

V

DD

+3.3V

EN

MAX14752

IN0

V

IN

NETWORK ANALYZER

S0

S1

S3

GND

1µF

V

-35V

OUT

SS

+35V

1μF

V

IN

R

= 50Ω

S

IN0

IN7

S0

S1

S2

. . .

MAX14752

GND

V

DD

OUT

R

= 1kΩ

L

EN

V

SS

CL = 15pF

ON-LOSS = 20log

V

OUT

V

OUT

MEAS REF

V

OUT

V

IN

R

= 50Ω

S

1μF

+35V

V

IN

IN0

IN1

IN7

S0

S1

S2

. . .

MAX14752

GND

V

DD

EN

OUT

V

SS

R

+3.3V

V

= 1kΩ

L

OUT

1μF

OFF ISOLATION = 20log

-35V

V

OUT

10nF

IN

CROSSTALK = 20log

-35V

V

OUT

IN

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

_______________________________________________________________________________________ 9

Test Circuits/Timing Diagrams/Truth Tables (continued)

Figure 10. Charge Injection

Table 1. MAX14752 Truth Table

Table 2. MAX14753 Truth Table

+35V

MAX14752

GND

V

DD

OUT

CL = 1nF

V

SS

-35V

IN_

EN

CHANNEL

SELECT

S0

S1

S2

S2 S1 S0 EN OUT

X X X 0 All off

0001IN0

0011IN1

0101IN2

0111IN3

1001IN4

1011IN5

1101IN6

1111IN7

+3.3V

V

EN

0V

V

OUT

V

OUT

0V

ΔV

IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER

OUT

ERROR Q WHEN THE CHANNEL TURNS OFF.

Q = CL x ΔV

OUT

S1 S0 EN OUTA OUTB

X X 0 All off All off

0 0 1 INA0 INB0

0 1 1 INA1 INB1

1 0 1 INA2 INB2

1 1 1 INA3 INB3

OFFON ON

ΔV

OUT

MAX14752/MAX14753

8-Channel/Dual 4-Channel 72V Analog Multiplexers

10 ______________________________________________________________________________________

Typical Operating Characteristics

(TA= +25°C, unless otherwise noted.)

50

52

56

54

58

60

ON-RESISTANCE

vs. V

OUT

(DUAL SUPPLIES)

MAX14752/3 toc01

R

ON

(Ω)

V

OUT

(V)

-35 5 5 15 25-15-25 35

±35V

±10V

±30V

±20V

20

40

80

60

120

100

140

ON-RESISTANCE vs. V

OUT

AND TEMPERATURE

(DUAL SUPPLIES)

MAX14752/3 toc02

R

ON

(Ω)

V

OUT

(V)

-35 5 5 15 25-15-25 35

VDD = +35V V

SS

= -35V

TA = +25°C

TA = +85°C

TA = +125°C

TA = -40°C

50

52

56

54

58

60

02010 30 40 50 60 70

ON-RESISTANCE vs. V

OUT

(SINGLE SUPPLY)

MAX14752/3 toc03

V

OUT

(V)

R

ON

(Ω)

+40V+20V

+70V

0

40

80

60

120

100

140

ON-RESISTANCE vs. V

OUT

AND TEMPERATURE

(SINGLE SUPPLY)

MAX14752/3 toc04

R

ON

(Ω)

V

OUT

(V)

-35 50510152025 30-10

-15

-20

-25

-30

35

VDD = +70V V

SS

= 0V

TA = +25°C

TA = +85°C

TA = +125°C

TA = -40°C

0.01

0.1

1

10

100

-40 -10 5-25 20 35 50 65 80 95 110 125

ON-LEAKAGE vs. TEMPERATURE

MAX14752/3 toc05

TEMPERATURE (°C)

LEAKAGE CURRENT (nA)

VDD = +35V V

SS

= -35V

I

OUT(ON)

0.01

0.1

1

10

100

-40 -10 5-25 20 35 50 65 80 95 110 125

OFF-LEAKAGE vs. TEMPERATURE

MAX14752/3 toc06

TEMPERATURE (°C)

LEAKAGE CURRENT (nA)

VDD = +35V V

SS

= -35V

I

OUT(OFF)

I

IN(OFF)

0

100

200

300

400

500

-40 -10 5-25 20 35 50 65 80 95 110 125

CHARGE INJECTION vs. TEMPERATURE

MAX14752/3 toc07

TEMPERATURE (°C)

Q (pC)

VDD = +35V V

SS

= -35V

250

270

260

300

290

280

310

320

340

330

350

SUPPLY CURRENT vs. TEMPERATURE

MAX14752/3 toc08

I

CC

, I

EE

(μA)

-40 -10 5-25 20 35 50 65 80 95 110 125 TEMPERATURE (°C)

VDD = +35V V

SS

= -35V

V

EN

= +3.3V

I

CC

I

EE

0

10

30

20

40

50

021345

EN INPUT CURRENT vs. V

S_

MAX14752/3 toc09

VS_ (V)

I

EN

(μA)

VDD = +35V V

SS

= -35V

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

______________________________________________________________________________________ 11

Typical Operating Characteristics (continued)

(TA= +25°C, unless otherwise noted.)

0.01 1 100.1 100

CROSSTALK vs. FREQUENCY

MAX14752/3 toc10

FREQUENCY (MHz)

CROSSTALK (dB)

0

-100

-80

-60

-40

-20

VDD = +35V V

SS

= -35V

0.01 1 100.1 100

OFF-ISOLATION vs. FREQUENCY

MAX14752/3 toc11

FREQUENCY (MHz)

OFF-ISOLATION (dB)

0

-100

-80

-60

-40

-20

VDD = +35V V

SS

= -35V

0.01 1 100.1 100

ON-LOSS vs. FREQUENCY

MAX14752/3 toc12

FREQUENCY (MHz)

ON-LOSS (dB)

0

-50

-40

-30

-20

-10

VDD = +35V V

SS

= -35V

0.01 1 100.1 100

TOTAL HARMONIC DISTORTION PLUS NOISE

vs. FREQUENCY

MAX14752/3 toc13

FREQUENCY (MHz)

THD+N (%)

0.005

0

0.001

0.002

0.003

0.004

VDD = +35V V

SS

= -35V

MAX14752/MAX14753

8-Channel/Dual 4-Channel 72V Analog Multiplexers

12 ______________________________________________________________________________________

MAX14752 Pin Description (Single 8-to-1 Mux)

MAX14753 Pin Description (Dual 4-to-1 Mux)

PIN NAME FUNCTION

1 S0 Mux Input Select

2EN

3VSSNegative Supply Voltage. Bypass VSS to GND with a 1µF ceramic capacitor.

4 IN0 Bidirectional Analog Input

5 IN1 Bidirectional Analog Input

6 IN2 Bidirectional Analog Input

7 IN3 Bidirectional Analog Input

8 OUT Bidirectional Analog Output

9 IN7 Bidirectional Analog Input

10 IN6 Bidirectional Analog Input

11 IN5 Bidirectional Analog Input

12 IN4 Bidirectional Analog Input

13 V

14 GND

15 S2 Mux Input Select

16 S1 Mux Input Select

Mux Enable. Drive EN high to enable the device. The EN high voltage defines input logic voltage level for S0, S1, and S2.

Positive Supply Voltage. Bypass VDD to GND with a 1µF ceramic capacitor.

DD

Ground. Connect GND to V supply.

for single supply. Bypass GND to VSS with a 1µF ceramic capacitor for dual

SS

PIN NAME FUNCTION

1 S0 Mux Input Select

2EN

3VSSNegative Supply Voltage. Bypass VSS to GND with a 1µF ceramic capacitor.

4 INA0 Bidirectional Analog Input

5 INA1 Bidirectional Analog Input

6 INA2 Bidirectional Analog Input

7 INA3 Bidirectional Analog Input

8 OUTA Bidirectional Analog Output

9 OUTB Bidirectional Analog Output

10 INB3 Bidirectional Analog Input

11 INB2 Bidirectional Analog Input

12 INB1 Bidirectional Analog Input

13 INB0 Bidirectional Analog Input

14 V

15 GND

16 S1 Mux Input Select

Mux Enable. Drive EN high to enable the device. The EN high voltage defines input logic voltage level for S0 and S1.

Positive Supply Voltage. Bypass VDD to GND with a 1µF ceramic capacitor.

DD

Ground. Connect GND to V supply.

for single supply. Bypass GND to VSS with a 1µF ceramic capacitor for dual

SS

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

______________________________________________________________________________________ 13

Detailed Description

The MAX14752/MAX14753 are 8-to-1 and dual 4-to-1 high-voltage analog multiplexers. Both devices feature 60Ω (typ) on-resistance with 0.03Ω (typ) on-resistance flatness. These low on-resistance multiplexers conduct equally well in either direction.

The MAX14752 is an 8-to-1 multiplexer and MAX14753 is a dual 4-to-1 multiplexer. Both devices operate with dual supplies of ±10V to ±36V or a single supply of +20V to +72V. Both devices can also operate with unbalanced supplies, such as +36V and -10V. These multiplexers support rail-to-rail input and output signals. The control logic level is defined via the EN input. These devices do not require power-supply sequencing.

Applications Information

Current Through the Mux

The current flowing through each on-channel of the MAX14752/MAX14753 multiplexers must be limited to ±5mA for normal operation. If the current exceeds this limit, an internal leakage current from that channel to VSSappears. Larger input current does not destroy the device if the max power dissipation is not exceeded.

Input Voltage Clamping

For applications that require input voltages beyond the normal operating voltages, the internal input diodes to VDDand VSScan be used to limit the input voltages. As shown in Figure 11, series resistors can be employed at the inputs to limit the currents flowing into the diodes during undervoltage and overvoltage conditions. Choose the

limiting resistors such that the input currents are limited to I

IN_

(max) = 100mA. The values of the current limit resis-

tors can be calculated as the larger of R

LIM+

and R

LIM-.

During an undervoltage or overvoltage condition, the input impedance is equal to R

LIM

. The additional power dissipation due to the fault currents needs to be calculated. The MAX14752/MAX14753 multiplexer operates normally on a channel that is on during an overvoltage or undervoltage clamping condition on a second channel that is not switched.

Beyond-the-Rail Input

If input voltages are expected to go beyond the supply voltages, but within the absolute maximum supply voltages of the MAX14752/MAX14753, add two diodes in series with the supplies as shown in Figure 12.

During undervoltage and overvoltage events, the internal diodes pull VDD/VSSsupplies up/down. An advantage of this scheme is that the input impedance is high and currents do not flow through the MAX14752/MAX14753 during overvoltage and undervoltage events. The input voltages must be limited to the voltages specified in the

Absolute Maximum Ratings

section.

R

V (max –V

I (max

R

V–V(

LIM+

IN_ DD

IN_

LIM

-

SS IN_

=

)

mmin

I (max

IN_

)

Figure 11. Input Overvoltage and Undervoltage Clamping

R

LIM

R

LIM

R

LIM

R

LIM

R

LIM

R

LIM

R

LIM

R

LIM

V

DD

MAX14752

OUT

CONTROL

V

SS

S0 S2 GNDS1 EN

MAX14752/MAX14753

8-Channel/Dual 4-Channel 72V Analog Multiplexers

14 ______________________________________________________________________________________

Figure 12. Beyond-the-Rail Application

1

2

3

4

5

16

15

14

13

12

S1

S2

GND

V

DD

IN0

V

SS

EN

SO

MAX14752

TSSOP

+

TOP VIEW

IN4IN1

6

7

8

11

10

9

IN5

IN6IN3

IN2

IN7 9 OUTBOUT

1

2

3

4

5

16

15

14

13

12

S1

GND

V

DD

INB0INA0

V

SS

EN

SO

INB1INA1

6

7

8

1110INB2

INB3INA3

INA2

OUTA

MAX14753

TSSOP

+

Pin Configurations

Chip Information

PROCESS: CMOS

Package Information

For the latest package outline information and land patterns, go to www.maxim-ic.com/packages

. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.

PACKAGE

TYPE

PACKAGE

CODE

OUTLINE

NO.

LAND

PATTERN NO.

16 TSSOP U16+1

21-0066 90-0117

V+

V

DD

R

IN_

V

IN

OUT

V

SS

V-

MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

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

Revision History

REVISION

NUMBER

0 8/08 Init ial release —

1 10/08

2 2/09 Added capacitance information to EC table

3 7/10

REVISION

DATE

DESCRIPTION

Changed the unit s from mA to μA for V Characteri stics—Dua l Supplies table

Deleted the “Input Capacitance” parameter from the DC Electrical Characteristics—

Dual Supplies

and VSS supply current in the DC Electrical

DD

PAGES

CHANGED

2

2, 4, 13, 14,

15, 16

3

MAXIM MAX14752, MAX14753 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual