MLX90313

Programmable IR Sensor Interface

MLX90313 Programmable IR sensor Interface

Page 13

Rev 1.0 21-July-2001

3901090313

AGND

DAC

IRout

Tout

DACREF

ENDREFDIV

ENDREFDIV

SELDR(2:0)

VREFP

IRout, Tout

DAC configuration

Output drivers

The IROUT and TEMPOUT outputs can be connected to various signals available: The amplified analog

signals (IRINP-IRINN and TINP-TINN), the linearised object respectively ambient temperature signals, or

to the comparator circuitry. The IROUT and TEMPOUT pin drivers can source 1mA and sink 20

µA and

are reverse voltage protected down to –5V relative to VSS. The available configurations are described in

table below.

Input/Output Setting

I/O pin

IROUT

TEMPOUT

Control

Bits

IROUTC[1:0]

Configuration

TOUTC[1:0]

Configuration

00b

IR-chain out

00b

Temp-chain out

01b

Linear Tobject

01b

Linear Tambient

10b

Threshold Rel1 input

10b

Comp1 out

Setting

11b

PWM out

11b

PWM out

REL1 is an open drain relay driver output controlled by the on-chip comparator circuitry. The available

configurations are described in the section on the comparator circuitry.