ZSSC3036

Low-Power 16-Bit Sensor Signal Conditioner IC

Data Sheet

May 28, 2013

© 2013 Zentrum Mikroelektronik Dresden AG

— Rev. 1.20

All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without

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Table 2.2

Amplifier Gain: Stage 2

Gain_stage2

BM_config Bit G4

BM_config Bit G3

BM_config Bit G2

Stage 2 Gain Setting

0

0

0

1.1

0

0

1

1.2

0

1

0

1.3

0

1

1

1.4

1

0

0

1.5

1

0

1

1.6

1

1

0

1.7

1

1

1

1.8

If needed, the polarity of the sensor bridge gain can be reversed by setting the Gain_polarity bit, which is bit 5 in

the BM_config register (see section 3.6.3). Changing the gain polarity is achieved by inverting the chopper clock.

Table 2.3 gives the settings for the Gain_polarity bit. This feature enables applying a sensor to the ZSSC3036

with swapped input signals at INN and INP; e.g., to avoid cro

ssing wires for the final sensor module’s assembly.

Table 2.3

Gain Polarity

Gain_polarity (BM_config Bit 5)

Gain

Setting Description

0

+1

No polarity change.

1

-1

Gain polarity is inverted.

The inherent amplifier offset is suppressed by means of auto-zero and chopper techniques.

The optimal gain (and offset) setup for a specific sensor element can be determined by these steps:

1)

Collect sensor elements’ characteristic, statistical data (over temperature, ambient sensor parameter, and

over production tolerances):

a. Minimum differential output voltage:

b. Maximum differential output voltage:

In this case, the respective offset setup (A2D_offset) is the nearest integer of multiples of 1/16 in the

range of 1/16 to 8/16 (see Table 2.8):

A2D_offset = Round_to_x16