1 Features

1• Six SAR ADCs Grouped in Three Pairs

• Maximum Data Rate Per Channel With Internal

Clock and Reference:

630 kSPS (Parallel) or 450 kSPS (Serial)

• Maximum Data Rate Per Channel With External

Clock and Reference:

800 kSPS (Parallel) or 500 kSPS (Serial)

• Pin-Selectable or Programmable Input Voltage

Ranges: Up to ±12 V

• Excellent AC Performance:

91.5-dB SNR, –94-dB THD

• Programmable and Buffered Internal Reference:

0.5 V to 2.5 V and 0.5 V to 3 V

• Comprehensive Power-Down Modes:

– Deep Power Down (Standby Mode)

– Auto-Nap Power Down

• Selectable Parallel or Serial Interface

• Operating Temperature Range: –40°C to 125°C

• LQFP-64 Package

2 Applications

• Power Quality Measurements

• Protection Relays

• Multi-Axis Motor Controls

• Programmable Logic Controllers

• Industrial Data Acquisition

3 Description

The ADS8555 device contains six low-power, 16-bit,

successive approximation register (SAR)-based

analog-to-digital converters (ADCs) with true bipolar

inputs. Each channel contains a sample-and-hold

circuit that allows simultaneous high-speed multichannel

signal acquisition.

The ADS8555 device supports data rates of up to

630 kSPS in parallel interface mode or up to

450 kSPS if the serial interface is used. The bus

width of the parallel interface can be set to eight or 16

bits. In serial mode, up to three output channels can

be activated.

The ADS8555 device is specified over the extended

industrial temperature range of –40°C to 125°C and is

available in an LQFP-64 package.