ADS1262 (ACTIVE)

32-Bit, 38kSPS, 10-Ch Delta-Sigma ADC With PGA and Voltage Reference for Factory Automation

32-Bit, 38kSPS, 10-Ch Delta-Sigma ADC With PGA and Voltage Reference for Factory Automation - ADS1262
 

 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) (kSPS)
# 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)
Rating
Sample Rate (Max) (MSPS)
ADS1262 ADS1220 ADS1248 ADS124S08 ADS1263
32    24    24    24    32   
38    2    2    4    38   
10    4    8    12    10   
SPI    SPI    SPI    SPI    SPI   
-40 to 125    -40 to 125    -40 to 105    -50 to 125    -40 to 125   
TSSOP    TSSOP
VQFN   
TSSOP    TQFP
VQFN   
TSSOP   
8.90 | 1ku    3.95 | 1ku    4.95 | 1ku    5.25 | 1ku    9.90 | 1ku   
27    1.4    2.3    1.75    27   
28TSSOP: 62 mm2: 6.4 x 9.7(TSSOP)    16TSSOP: 32 mm2: 6.4 x 5(TSSOP)
16VQFN: 12 mm2: 3.5 x 3.5(VQFN)   
28TSSOP: 62 mm2: 6.4 x 9.7(TSSOP)    32TQFP: 49 mm2: 7 x 7(TQFP)
32VQFN: 25 mm2: 5 x 5(VQFN)   
28TSSOP: 62 mm2: 6.4 x 9.7(TSSOP)   
Delta-Sigma    Delta-Sigma    Delta-Sigma    Delta-Sigma    Delta-Sigma   
Differential
Single-Ended   
Differential
Single-Ended   
Differential
Single-Ended   
Differential
Single-Ended   
Differential
Single-Ended   
Multiplexed    Multiplexed    Multiplexed    Multiplexed    Multiplexed   
Ext
Int   
Ext
Int
Supply   
Ext
Int   
Ext
Int   
Ext
Int   
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   
50/60 Hz Rejection
Excitation Current Sources (iDACs)
GPIO
Oscillator
PGA
Temp Sensor   
2.5
5   
2.85
5.6   
2.125
4.25   
2.625
5.25   
2.5
5   
-2.5
0   
-2.85
0   
-2.125
0   
-2.625
0   
-2.5
0   
4.75    2.3    2.7    2.7    4.75   
5.25    5.5    5.25    5.25    5.25   
2.7    2.3    2.7    2.7    2.7   
5.25    5.5    5.25    3.6    5.25   
  251.7         
Catalog    Catalog    Catalog    Catalog    Catalog   
0.038    0.002    0.002    0.004    0.038