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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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)
Rating
ADS1258-EP
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    

Design tool

WEBENCH® Designer ADS1258-EP