1FEATURES

2? AC Performance:

107dB of Dynamic Range at 625kSPS

115.5dB of Dynamic Range at 78kSPS

–113dB THD

? DC Accuracy:

3ppm INL

2mV/°C Offset Drift

2ppm/°C Gain Drift

? Programmable Digital Filter with

User-Selectable Path:

– Low-Latency: Completely settles in 5.5ms

– Wide-Bandwidth: 305kHz BW with flat

passband

? Flexible Read-Only Serial Interface:

– Standard CMOS

– Serialized LVDS

? Easy Conversion Control with START Pin

? Out-of-Range Detection

? Supply: Analog +5V, Digital +3V

? Power: 350mW

APPLICATIONS

? Automated Test Equipment

? Vibration Analysis

? Sonar

? Test and Measurement

DESCRIPTION

The ADS1672 is a high-speed, high-precision

analog-to-digital converter (ADC). Using an advanced

delta-sigma (ΔΣ) architecture, it operates at speeds

up to 625kSPS with outstanding ac performance and

dc accuracy.

The ADS1672 ADC is comprised of a low-drift,

chopper-stabilized modulator with out-of-range

detection and a dual-path programmable digital filter.

The dual filter path allows the user to select between

two post-processing filters: low-latency or wide-bandwidth. The low-latency filter settles quickly

in one cycle, for applications with large instantaneous

changes, such as a multiplexer. The wide-bandwidth

path provides an optimized frequency response for ac

measurements with a passband ripple of less than 0.001dB, stop band attenuation of 86dB, and a

bandwidth of 305kHz.

The ADS1672 is controlled through I/O pins—there

are no registers to program. A dedicated START pin

allows for direct control of conversions: toggle the

START pin to begin a conversion, and then retrieve the output data. The flexible serial interface supports

data readback with either standard CMOS and LVDS

logic levels, allowing the ADS1672 to directly connect

to a wide range of microcontrollers, digital signal

processors (DSPs), or field-programmable grid arrays

(FPGAs).

The ADS1672 operates from an analog supply of 5V

and digital supply of 3V, and dissipates 350mW of

power. When not in use, the PDWN pin can be used

to power down all device circuitry. The device is fully

specified over the industrial temperature range and is

offered in a TQFP-64 package.