ADS1672 High Speed High Resolution 625kSPS 24 bit Delta Sigma ADC | TI.com

ADS1672 (ACTIVE)

High Speed High Resolution 625kSPS 24 bit Delta Sigma ADC

High Speed High Resolution 625kSPS 24 bit Delta Sigma ADC - ADS1672
Datasheet
 

Description

The ADS1672 is a high-speed, high-precision analog-to-digital converter (ADC). Using an advanced delta-sigma () 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.

Features

  • AC Performance:
    107dB of Dynamic Range at 625kSPS
    115.5dB of Dynamic Range at 78kSPS
    –113dB THD
  • DC Accuracy:
    3ppm INL
    2µ/°C Offset Drift
    2ppm/°C Gain Drift
  • Programmable Digital Filter with User-Selectable Path:
    • Low-Latency: Completely settles in 5.5µs
    • 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

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WEBENCH® Designer ADS1672



Parametrics

Compare all products in Precision ADCs (<=10MSPS) Email Download to Excel
Part number Order Resolution (Bits) Sample rate (Max) (kSPS) Number of input channels Interface Operating temperature range (C) Package Group Approx. price (US$) Power consumption (Typ) (mW) Package size: mm2:W x L (PKG) Architecture Input type Multi-channel configuration Reference mode Features Input range (Max) (V) Input range (Min) (V) Analog voltage AVDD (Min) (V) Analog voltage AVDD (Max) (V) Digital supply (Min) (V) Digital supply (Max) (V) INL (Max) (+/-LSB) SNR (dB) THD (Typ) (dB) Rating
ADS1672 Order now 24     625     1     Serial     -40 to 85     TQFP | 64     12.65 | 1ku     350     64TQFP: 144 mm2: 12 x 12 (TQFP | 64)     Delta-Sigma     Differential    
   
Ext    
   
3.25     0     4.75     5.25     2.7     3.3     159.4     103     -109     Catalog    
ADS1271 Order now 24     105     1     SPI     -40 to 105     TSSOP | 16     6.31 | 1ku     92     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     Delta-Sigma     Differential    
   
Ext     Daisy-Chainable     5.25     0     4.75     5.25     1.65     3.6       109     -105     Catalog    
ADS1675 Order now 24     4000     1     Serial     -40 to 85     TQFP | 64     19.32 | 1ku     575     64TQFP: 144 mm2: 12 x 12 (TQFP | 64)     Delta-Sigma     Differential    
   
Ext    
   
3.5     0     4.75     5.25     2.85     3.15     251.7     107     -107     Catalog