ZSC31010 Datasheet

© 2016 Integrated Device Technology, Inc.

11

January 20, 2016

2

Circuit Description

2.1.

Signal Flow and Block Diagram

The ZSC31010 resistive bridge sensor interface ICs were specifically designed as a cost-effective solution for

IDT’s high precision bandgap with proportional-to-absolute temperature (PTAT) output; a low-power 14-bit

analog-to-digital converter (ADC, A2D, A-to-D); and an on-chip DSP core with EEPROM to precisely calibrate the

bridge output signal. Three selectable output modes, two analog and one digital, offer the ultimate in versatility

across many applications.

The ZSC31010 rail-to-rail ratiometric analog output Vout signal (0 to 5 V, Vout @ VDD = 5 V) suits most building

automation and automotive requirements. Typical office automation and white goods applications require the

0 to 1 Vout signal, which in the ZSC31010 is referenced to the internal bandgap. Direct interfacing to

microprocessor controllers is facilitated via IDT’s single-wire serial ZACwire™ digital interface.

The ZSC31010 is capable of running in high-voltage (5.5 to 30 V) systems when combined with an external JFET.

Figure 2.1

ZSC31010 Block Diagram

ADC

Analog Block

Digital Block

ZSC31010

0 V to 1 V

Ratiometric

Rail-to-Rail

OWI/

ZACwire

TM

0.1

mF

VSS

VBP

DAC

OUTBUF

ZACwire

TM

Interface

DSP

EEPROM

PREAMP

INMUX

Temp.

Reference

VDD

Regulator

Power Save

POR Osc.

VBN

Vgate

VDD

SIG

TM

Bsink

optional

2.7 to 5.5 V

JFET

(optional if supply is 2.7 to 5.5 V)

D

S

5.5 V to 30 V

1nF