ADS1675 4MSPS, 24-Bit Analog-to-Digital Converter | TI.com

ADS1675 (ACTIVE) 4MSPS, 24-Bit Analog-to-Digital Converter

4MSPS, 24-Bit Analog-to-Digital Converter - ADS1675
Datasheet
 

Description

The ADS1675 is a high-speed, high-precision analog-to-digital converter (ADC). Using an advanced delta-sigma () architecture, it operates at speeds up to 4MSPS with outstanding ac performance and dc accuracy.

The ADS1675 ADC is comprised of a low-drift 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 (as fast as 2.65µs) 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 ±0.00002dB, stop band attenuation of 86dB, and a bandwidth of 1.7MHz.

The device offers two speed modes with distinct interface, resolution, and feature set. In the high-speed mode the device can be set to operate at either 4MSPS or 2MSPS. In the low-speed mode, it can be set to operate at either 1MSPS, 500KSPS, 250KSPS or 125KSPS.

The ADS1675 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 ADS1675 to directly connect to a wide range of microcontrollers, digital signal processors (DSPs), or field-programmable grid arrays (FPGAs).

The ADS1675 operates from an analog supply of 5V and digital supply of 3V, and dissipates 575mW 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:
    103dB of Dynamic Range at 4MSPS
    111dB of Dynamic Range at 125kSPS
    –107dB THD
  • DC Accuracy:
    3ppm INL
    4µV/°C Offset Drift
    4ppm/°C Gain Drift
  • Programmable Digital Filter with User-Selectable Path:
    • Low-Latency: Completely settles in 2.65µs
    • Wide-Bandwidth: 1.7MHz 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: 575mW
  • APPLICATIONS
    • Automated Test Equipment
    • Medical Imaging
    • Scientific Instrumentation
    • Test and Measurement

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Parametrics

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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
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    
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    
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