Broadcom

ACPL-C787U-DS100

2

ACPL-C787U Data Sheet

Optically Isolated Sigma-Delta Modulator with

Low Offset Drift and Wide Operating Temperature

Functional Block Diagram

Figure 1: Functional Block Diagram

Pin Configurations and Descriptions

Figure 2: Pin Configuration

Table 1: Pin Descriptions

Pin

Symbol

Description

1

VDD1

Supply voltage for signal input side (analog side), relative to GND1

2

VIN+

Positive analog input, recommended input range ±200 mV

3

VIN–

Negative analog input, recommended input range ±200 mV (normally connected to GND1)

4

GND1

Supply ground for signal input side

5

GND2

Supply ground for data/clock output side (digital side)

6

MDAT

Modulator data output

7

MCLK

Modulator clock output

8

VDD2

Supply voltage for data output side, relative to GND2

LED

DRIVER

SHIELD

CLK

VREF

-

MODULATOR/

ENCODER

DECODER

VDD1

VIN+

VIN–

VDD2

MCLK

MDAT

GND1

GND2

VDD1

VIN+

VIN–

GND1

VDD2

MCLK

MDAT

GND2

4

3

2

1

ACPL-C787U

5

6

7

8