LTC1093CSW datasheet(8/32 Pages) LINER

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LTC1091/LTC1092

LTC1093/LTC1094

LTC1092/LTC1093/LTC1094

Reference Current vs Temperature

AMBIENT TEMPERATURE (

°C)

–50

0.6

0.5

0.4

0.3

0.2

0.1

1091/2/3/4 G28

–25

125

100

VREF = 5V

AMBIENT TEMPERATURE (

°C)

–50

100

300

400

500

1000

700

125

1091/2/3/4 G29

200

800

900

600

–25

100

ON-CHANNEL

OFF-CHANNEL

GUARANTEED

LTC1093/LTC1094 Input Channel

Leakage Current vs Temperature

PI FU CTIO S

LTC1091/LTC1092

CS (Pin 1): Chip Select Input. A logic low on this input

enables the LTC1091/LTC1092.

CH0, CH1/+ IN, – IN (Pins 2, 3): Analog Inputs. These

inputs must be free of noise with respect to GND.

GND (Pin 4): Analog Ground. GND should be tied directly

to an analog ground plane.

DIN (Pin 5)(LTC1091): Digital Data Input. The multiplexer

address is shifted into this input.

VREF (Pin 5)(LTC1092): Reference Input. The reference

input defines the span of the A/D converter and must be

kept free of noise with respect to AGND.

DOUT (Pin 6): Digital Data Output. The A/D conversion

result is shifted out of this output.

CLK (Pin 7): Shift Clock. This clock synchronizes the serial

data transfer.

VCC(VREF)(Pin 8)(LTC1091): Positive Supply and Refer-

ence Voltage. This pin provides power and defines the

span of the A/D converter. It must be kept free of noise and

ripple by bypassing directly to the analog ground plane.

VCC (Pin 8 )(LTC1092): Positive Supply Voltage. This pin

provides power to the A/D converter. It must be kept free

of noise and ripple by bypassing directly to the analog

ground plane.

LTC1093/LTC1094

CH0 to CH5/CH0 to CH7 (Pins 1 to 6/Pins 1 to 8): Analog

Inputs. The analog inputs must be free of noise with

respect to AGND.

COM (Pin 7/Pin 9): Common. The common pin defines the

zero reference point for all single-ended inputs. It must be

free of noise and is usually tied to the analog ground plane.

DGND (Pin 8/Pin 10): Digital Ground. This is the ground

for the internal logic. Tie to the ground plane.

V – (Pin 9/Pin 11): Negative Supply. Tie V – to most

negative potential in the circuit. (Ground in single supply

applications.)

AGND (Pin 10/Pin 12): Analog Ground. AGND should be

tied directly to the analog ground plane.

HARA TERISTICS

TYPICALPERFOR

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