MAX4540 datasheet(11/20 Pages) MAXIM

Part #	MAX4540

Description	Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers

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Manufacturer	MAXIM [Maxim Integrated Products]

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Low-Voltage, Single 8-to-1 and

Dual 4-to-1 Cal-Multiplexers

______________________________________________________________________________________

11

Truth Tables

MAX4539 (Single 8-to-1 Cal-Mux)

State is latched when LATCH is high.

X

NO2

0

NO1

0

NO4

0

NO6

0

NO5

0

NO3

0

NO8

0

REFHI

1

(V+ / 2) Divider Mode, VCOM = 2048/4096 V+

1

(V+ - V-) Divider Mode , VCOM = 2560/4096 (V+ - V-)

1

CAL

Gain Divider Mode, VCOM = 4081/4096 (VREFHI - VREFLO)

1

All switches and dividers open. COM is high-Z. Latch contents set

to all 1’s.

X

COM

GND

1

REFLO

1

NO7

0

All switches and dividers open. COM is high-Z.

1

Offset Divider Mode, VCOM = 15/4096 (VREFHI - VREFLO)

1

X

0

1

0

1

0

A2

1

X

1

0

1

X

0

1

0

1

0

1

A1

0

X

0

1

X

1

0

1

0

1

0

1

A0

1

X

0

1

0

1

EN

1

0

1

0

LATCH

0

X

0

MAX4540 (Dual 4-to-1 Cal-Mux)

State is latched

X

NO2A

0

NO1A

0

NO4A

0

Gain Divider Mode

1

GND

1

NO3A

0

All switches and dividers open.

COMA is high-Z.

1

CAL

All switches and dividers open.

COMA is high-Z.

COMA

X

Offset Divider Mode

1

X

0

1

0

1

A1

X

1

X

1

0

1

0

1

A0

X

0

1

EN

0

1

0

LATCH

X

0

State is latched

NO2B

NO1B

NO4B

REFLO

GND

NO3B

All switches and dividers open.

COMB is high-Z.

All switches and dividers open.

COMB is high-Z.

COMB

REFLO

X = Don’t care

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