ADS1258-EP Enhanced product 16-channel 24-bit analog-to-digital converter (ADC) | TI.com

ADS1258-EP (ACTIVE) Enhanced product 16-channel 24-bit analog-to-digital converter (ADC)

Enhanced product 16-channel 24-bit analog-to-digital converter (ADC) - ADS1258-EP
Datasheet
 

Description

The ADS1258 is a 16-channel (multiplexed), low-noise, 24-bit, delta-sigma () analog-to-digital converter (ADC) that provides single-cycle settled data at channel scan rates from 1.8k to 23.7k samples per second (SPS) per channel. A flexible input multiplexer accepts combinations of eight differential or 16 single-ended inputs with a full-scale differential range of 5 V or true bipolar range of ±2.5 V when operating with a 5-V reference. The fourth-order delta-sigma modulator is followed by a fifth-order sinc digital filter optimized for low-noise performance.

The differential output of the multiplexer is accessible to allow signal conditioning prior to the input of the ADC. Internal system monitor registers provide supply voltage, temperature, reference voltage, gain, and offset data.

An onboard PLL generates the system clock from a 32.768-kHz crystal, or can be overridden by an external clock source. A buffered system clock output (15.7 MHz) is provided to drive a microcontroller or additional converters.

Serial digital communication is handled via an SPI-compatible interface. A simple command word structure controls channel configuration, data rates, digital I/O, monitor functions, etc.

Programmable sensor bias current sources can be used to bias sensors or verify sensor integrity.

The ADS1258 operates from a unipolar 5-V or bipolar ±2.5-V analog supply and a digital supply compatible with interfaces ranging from 2.7 V to 5.25 V. The ADS1258 is available in QFN-48 and QFP-48 packages.

Features

  • 24 Bits, No Missing Codes
  • Fixed-Channel or Automatic Channel Scan
  • Fixed-Channel Data Rate: 125 kSPS
  • Auto-Scan Data Rate: 23.7 kSPS/Channel
  • Single-Conversion Settled Data
  • 16 Single-Ended or 8 Differential Inputs
  • Unipolar (5 V) or Bipolar (±2.5 V) Operation
  • Low Noise: 2.8 µVRMS at 1.8 kSPS
  • 0.0003% Integral Nonlinearity
  • DC Stability (typical):
    0.02 µV/°C Offset Drift, 0.4 ppm/°C Gain Drift
  • Open-Sensor Detection
  • Conversion Control Pin
  • Multiplexer Output for External Signal Conditioning
  • On-Chip Temperature, Reference, Offset, Gain, and
    Supply Voltage Readback
  • 42-mW Power Dissipation
  • Standby, Sleep, and Power-Down Modes
  • 8 General-Purpose Inputs/Outputs (GPIO)
  • 32.768-kHz Crystal Oscillator or External Clock
  • APPLICATIONS
    • Medical, Avionics, and Process Control
    • Machine and System Monitoring
    • Fast Scan Multi-Channel Instrumentation
    • Industrial Systems
    • Test and Measurement Systems
  • APPLICATIONS
    • Controlled Baseline
    • One Assembly/Test Site
    • One Fabrication Site
    • Available in Military (–55°C/125°C) and
      Industrial (–40°C/105°C) Temperature Ranges(1)
    • Extended Product Life Cycle
    • Extended Product-Change Notification
    • Product Traceability

(1) Custom temperature ranges available
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WEBENCH® Designer ADS1258-EP



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) Rating
ADS1258-EP Order now 24     125     16     SPI     -40 to 105
-55 to 125    
HTQFP | 48
VQFN | 48    
15.95 | 1ku     42     48HTQFP: 81 mm2: 9 x 9 (HTQFP | 48)
48VQFN: 49 mm2: 7 x 7 (VQFN | 48)    
Delta-Sigma     Differential
Single-Ended    
Multiplexed     Ext     GPIO
Oscillator
Temp Sensor    
2.75
5.35    
-2.7
-0.1    
4.75     5.25     2.7     5.25     167.8     117     HiRel Enhanced Product