ZSC31015 datasheet(13/52 Pages) IDT

13 / 52 page

November 14, 2016

ZSC31015 Datasheet

Analog Block

Digital Block

RBicdLite

ZSC31015

0.1

F

VSS

VBP

12-Bit

DAC

OUTBUF1

ZACwire

Interface

Digital

Core

EEPROM

with Charge

Pump

PREAMP

INMUX

Temperature

Reference

VDD

Regulator

Power Save

POR/Oscillator

VBN

Vgate

SIG

Bsink

(Optional)

VDD (2.7 to 5.5 V)

JFET

(Optional if supply is 2.7 to 5.5 V)

VSUPPLY

5.5 V to 30 V

Sensor

Diagnostics

Ext Temp

Power Lost

Diagnostic

14-Bit ADC

PTAT

Optional

Ext. Diode

for Temp

0 V to 1 V

Ratiometric

Rail-to-Rail

OWI/ZACwire

Circuit Description

2.1.

Signal Flow and Block Diagram

The ZSC31015 resistive bridge sensor interface ICs were specifically designed as cost-effective solutions for

sensing in building automation, automotive *, industrial, office automation and white goods applications. The

ZSC31015 employs IDT

’s high precision bandgap with proportional-to-absolute-temperature (PTAT) output; 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 outputs, two analog and one digital, offer the ultimate in versatility across many applications.

The ZSC31015 rail-to-rail ratiometric analog Vout signal (0V to ~5 V Vout @ VDD=5V) suits most building automation

and automotive requirements (12-bit resolution). Typical office automation and white goods applications require

the 0 to ~1V Vout signal, which in the ZSC31015 is referenced to the internal bandgap. The ZSC31015 is capable

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

Direct interfacing to

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

Figure 2.1

ZSC31015 Block Diagram

* Not AEC-Q100-qualified.

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