ADS1260 24-bit 40-kSPS 5-ch delta-sigma ADC with PGA, VREF and IDACs for factory automation | TI.com

ADS1260 (ACTIVE)

24-bit 40-kSPS 5-ch delta-sigma ADC with PGA, VREF and IDACs for factory automation

 

Description

The ADS1260 and ADS1261 (ADS126x) are precision, 40-kSPS, delta-sigma (ΔΣ) analog-to-digital converters (ADCs) that include a programmable gain amplifier (PGA). The devices also include a precision voltage reference and internal fault monitors. The sensor-ready ADCs give a high-accuracy, single-chip solution for the most demanding measurements, for example, weigh scales and resistance temperature detectors (RTDs).

The ADCs contain an input signal multiplexer, a low-noise PGA (with gains from 1 to 128), a 24-bit ΔΣ modulator, a precision voltage reference, and a programmable digital filter.

The high-impedance PGA inputs (1 GΩ) decrease measurement error due to sensor loading. The ADS1260 supports three differential or five single-ended inputs. The ADS1261 supports five differential or ten single-ended inputs. The integrated current sources simplify the measurement of RTDs.

The flexible digital filter is programmable for single-cycle settled conversions, while supplying simultaneous 50-Hz and 60-Hz line cycle rejection. Signal and reference monitors, a temperature sensor, and CRC data verification make data reliability better.

The ADS126x are pin compatible devices given in a 5-mm × 5-mm VQFN package and are specified across the –40°C to +125°C temperature range.

Features

  • 24-bit, high-precision ADCs
    • Offset drift: 1 nV/°C
    • Gain drift: 0.5 ppm/°C
    • Noise: 30 nVRMS (20 SPS, gain = 128)
    • Linearity: 2 ppm
  • CMOS PGA gain: 1 to 128
  • Wide input voltage range: ±7 mV to ±5 V
  • Data rate: 2.5 SPS to 40 kSPS
  • 2.5-V reference: 2 ppm/°C
  • Simultaneous 50-Hz and 60-Hz rejection mode
  • Single-cycle settling mode
  • Signal and reference monitors
  • 5-V or ±2.5-V power supply
  • Internal temperature sensor
  • Cyclic redundancy check (CRC)
  • Excitation current sources
  • Sensor burn-out current sources
  • Four general-purpose inputs/outputs (ADS1261)
  • AC excitation for bridge sensors (ADS1261)
  • 5-mm × 5-mm VQFN package

All trademarks are the property of their respective owners.

Parametrics

Compare all products in Precision ADCs (<=10MSPS) Email Download to Excel
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) Rating
ADS1260 Order now 24     40     5     SPI     -40 to 125     VQFN | 32     6.50 | 1ku     24     32VQFN: 25 mm2: 5 x 5 (VQFN | 32)     Delta-Sigma     Differential
Single-Ended    
Multiplexed     Ext
Int    
50/60 Hz Rejection
Excitation Current Sources (iDACs)
Oscillator
PGA
Temp Sensor    
2.5
5    
-2.5
0    
4.75     5.25     2.7     5.25     Catalog    
ADS124S06 Order now 24     4     6     SPI     -50 to 125     TQFP | 32
VQFN | 32    
4.75 | 1ku     1.75     32TQFP: 49 mm2: 7 x 7 (TQFP | 32)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
Delta-Sigma     Differential
Single-Ended    
Multiplexed     Ext
Int    
50/60 Hz Rejection
Excitation Current Sources (iDACs)
GPIO
Oscillator
PGA
Temp Sensor    
2.625
5.25    
-2.625
0    
2.7     5.25     2.7     3.6     Catalog    
ADS1261 Order now 24     40     10     SPI     -40 to 125     VQFN | 32     6.80 | 1ku     24     32VQFN: 25 mm2: 5 x 5 (VQFN | 32)     Delta-Sigma     Differential
Single-Ended    
Multiplexed     Ext
Int    
50/60 Hz Rejection
Excitation Current Sources (iDACs)
GPIO
Oscillator
PGA
Temp Sensor    
2.5
5    
-2.5
0    
-2.5
4.75    
2.5
5.25    
2.7     5.25     Catalog    
ADS1262 Order now 32     38     10     SPI     -40 to 125     TSSOP | 28     8.90 | 1ku     27     28TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP | 28)     Delta-Sigma     Differential
Single-Ended    
Multiplexed     Ext
Int    
50/60 Hz Rejection
Excitation Current Sources (iDACs)
GPIO
Oscillator
PGA
Temp Sensor    
2.5
5    
-2.5
0    
4.75     5.25     2.7     5.25     Catalog