CS5451A
Six-channel, Delta-sigma Analog-to-digital Converter
Features • Synchronous Sampling • On-chip 1.2 V Reference...
CS5451A
Six-channel, Delta-sigma Analog-to-digital Converter
Features Synchronous Sampling On-chip 1.2 V Reference (25 ppm/°C typ.) Power Supply Configurations:
- VA+ = +3 V; VA- = -2 V; VD+ = +3 V - Supply Tolerances: ±10%
Power Consumption
- 23 mW Typical at VD+ = +3 V
Simple Four-wire Serial Interface Charge pump driver output generates
negative power supply. Ground-referenced Bipolar Inputs
Description
The CS5451A is a highly integrated delta-sigma ( analog-to-digital converter (ADC) developed for the power measurement industry. The CS5451A combines six ADCs, decimation filters, and a serial interface on a single chip. The CS5451A interfaces directly to a current transformer or shunt to measure current, and to a resistive divider or transformer to measure voltage. The product features a serial interface for communication with a microcontroller or DSP. The product is initialized and fully functional upon reset, and includes a voltage reference.
ORDERING INFORMATION:
See page 13.
GAIN
VA+
RESET
IIN1+ IIN1-
VIN1+ VIN1-
x1, 20 x1
4th Order Modulator 4th Order Modulator
Decimation Filter Decimation Filter
IIN2+
x1, 20
4th Order Modulator
Decimation Filter
IIN2-
VIN2+ VIN2-
x1
4th Order Modulator
Decimation Filter
IIN3+ IIN3VIN3+ VIN3-
VREFIN
VREFOUT
x1, 20 4th Order Modulator
x1 4th Order Modulator
x1
Voltage Reference
Decimation Filter Decimation Filter
Clock
VD+
Serial Interface
Pulse Output
Regulator
SE OWRS SDO ...