32-Bit, 38kSPS, 10-Ch Delta-Sigma ADC w/ PGA & Voltage Reference for Factory Automation - ADS1262

ADS1262 (ACTIVE)

32-Bit, 38kSPS, 10-Ch Delta-Sigma ADC w/ PGA & Voltage Reference for Factory Automation

 

 Innovation Award Selezone 2016

Description

The ADS1262 and ADS1263 are low-noise, low-drift, 38.4-kSPS, delta-sigma (ΔΣ) ADCs with an integrated PGA, reference, and internal fault monitors. The ADS1263 integrates an auxiliary, 24-bit, ΔΣ ADC intended for background measurements. The sensor-ready ADCs provide complete, high-accuracy, one-chip measurement solutions for the most-demanding sensor applications, including weigh scales, strain-gauge sensors, thermocouples, and resistance temperature devices (RTD).

The ADCs are comprised of a low-noise, CMOS PGA (gains 1 to 32), a ΔΣ modulator, followed by a programmable digital filter. The flexible analog front-end (AFE) incorporates two sensor-excitation current sources suitable for direct RTD measurement.

A single-cycle settling digital filter maximizes multiple-input conversion throughput, while providing 130-dB rejection of 50-Hz and 60-Hz line cycle interference.

The ADS1262 and ADS1263 are pin and functional compatible. These devices are available in a 28-pin TSSOP package and are fully specified over the –40°C to +125°C temperature range.

Features

  • Precision, 32-bit, ΔΣ ADC
  • Auxiliary 24-Bit, ΔΣ ADC (ADS1263)
  • Data Rates: 2.5 SPS to 38400 SPS
  • Differential Input, CMOS PGA
  • 11 Multifunction Analog Inputs
  • High-Accuracy Architecture
    • Offset Drift: 1 nV/°C
    • Gain Drift: 0.5 ppm/°C
    • Noise: 7 nVRMS (2.5 SPS, Gain = 32)
    • Linearity: 3 ppm
  • 2.5-V Internal Voltage Reference
    • Temperature Drift: 2 ppm/°C
  • 50-Hz and 60-Hz Rejection
  • Single-Cycle Settled Conversions
  • Dual Sensor Excitation Current Sources
  • Internal Fault Monitors
  • Internal ADC Test Signal
  • 8 General-Purpose Input/Outputs

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

 
Resolution (Bits)
Sample Rate (max) (SPS)
# Input Channels
Input Type
Power Consumption (Typ) (mW)
Input Range (Min) (V)
Input Range (Max) (V)
Interface
Features
Analog Voltage AVDD (Min) (V)
Analog Voltage AVDD (Max) (V)
Architecture
Operating Temperature Range (C)
Pin/Package
Reference Mode
ADS1262 ADS1220 ADS1248 ADS124S08
32    24    24    24   
38kSPS    2kSPS    2kSPS    4kSPS   
10    4    8    12   
Differential
Single-Ended   
Differential
Single-Ended   
Differential
Single-Ended   
Differential
Single-Ended   
27    1.4    2.3    1.75   
-2.5
0   
-2.85
0   
-2.125
0   
0   
2.5
5   
2.85
5.6   
2.125
4.25   
5.25   
SPI    SPI    SPI    SPI   
50/60 Hz Rejection
Excitation Current Sources (iDACs)
GPIO
Oscillator
PGA
Temp Sensor   
50/60 Hz Rejection
Excitation Current Sources (iDACs)
Oscillator
PGA
Temp Sensor   
50/60 Hz Rejection
Excitation Current Sources (iDACs)
GPIO
Oscillator
PGA
Temp Sensor   
50/60 Hz Rejection
Excitation Current Sources (iDACs)
GPIO
Oscillator
PGA
Temp Sensor   
4.75    2.3    2.7    2.7   
5.25    5.5    5.25    5.25   
Delta-Sigma    Delta-Sigma    Delta-Sigma    Delta-Sigma   
-40 to 125    -40 to 125    -40 to 105    -50 to 125   
28TSSOP    16TSSOP
16VQFN   
28TSSOP    32TQFP
32VQFN   
Ext
Int   
Ext
Int
Supply   
Ext
Int   
Ext
Int