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 Compare all products in Precision ADCs (<=10MSPS)

 
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 ADS1271 ADS1672
24     24     24    
4000     105     625    
1     1     1    
Serial     SPI     Serial    
-40 to 85     -40 to 105     -40 to 85    
TQFP | 64     TSSOP | 16     TQFP | 64    
19.32 | 1ku     6.31 | 1ku     12.65 | 1ku    
575     92     350    
64TQFP: 144 mm2: 12 x 12 (TQFP | 64)     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     64TQFP: 144 mm2: 12 x 12 (TQFP | 64)    
Delta-Sigma     Delta-Sigma     Delta-Sigma    
Differential     Differential     Differential    
   
   
   
Ext     Ext     Ext    
   
Daisy-Chainable    
   
3.5     5.25     3.25    
0     0     0    
4.75     4.75     4.75    
5.25     5.25     5.25    
2.85     1.65     2.7    
3.15     3.6     3.3    
251.7       159.4    
107     109     103    
-107     -105     -109    
Catalog     Catalog     Catalog