7

LTC1096L/LTC1098L

S

APPLICATI

I FOR ATIO

single-ended mode, all input channels are measured with

respect to GND.

LTC1098L Channel Selection

MUX ADDRESS

SGL/DIFF

1

1

0

0

ODD/SIGN

0

1

0

1

CHANNEL #

CH0

+

+

–

CH1

+

–

+

GND

–

–

LTC1096/8 • AI02

MSB-First/LSB-First (MSBF)

The output data of the LTC1098L is programmed for

MSB-first or LSB-first sequence using the MSBF bit.

When the MSBF bit is a logical one, data will appear on

filled in indefinitely following the last data bit. When the

MSBF bit is a logical zero, LSB-first data will follow the

and 2).

ANALOG CONSIDERATIONS

Grounding

The LTC1096L/LTC1098L should be used with an analog

ground plane and single point grounding techniques. Do

not use wire wrapping techniques to breadboard and

evaluate the device. To achieve the optimum performance

use a printed circuit board. The GND pin (Pin 4) should be

tied directly to the ground plane with minimum lead

length.

Bypassing

conversion cycle can induce errors or noise in the output

ground plane with a minimum 0.1

µF capacitor and with

by a 0.1

µF capacitor.

Analog Inputs

Because of the capacitive redistribution A/D conversion

techniques used, the analog inputs of the LTC1096L/

LTC1098L have capacitive switching input current spikes.

These current spikes settle quickly and do not cause a

problem. But if large source resistances are used or if slow

settling op amps drive the inputs, take care to ensure the

transients caused by the current spikes settle completely

before the conversion begins.

CLK

CS

B7

B6

B5

B4

B3

B2

B1

B0

B1

B2

B3

B4

B5

B6

B7

NULL

BIT

Hi-Z

LTC1096/98 F01

POWER

DOWN

Hi-Z

FILLED

WITH

ZEROES

Figure 1. LTC1096L Operating Sequence