ADS124S08 24-Bit, 4kSPS, 12-Ch Delta-Sigma ADC With PGA and Voltage Reference for Precision Sensor Measurement | TI.com

ADS124S08 (ACTIVE)

24-Bit, 4kSPS, 12-Ch Delta-Sigma ADC With PGA and Voltage Reference for Precision Sensor Measurement

 

Description

The ADS124S06 and ADS124S08 are precision, 24-bit, delta-sigma (ΔΣ), analog-to-digital converters (ADCs) that offer low power consumption and many integrated features to reduce system cost and component count in applications measuring small-signal sensors.

These ADCs feature configurable digital filters that offer low-latency conversion results and 50-Hz or
60-Hz rejection for noisy industrial environments. A low-noise, programmable gain amplifier (PGA) provides gains ranging from 1 to 128 to amplify low-level signals for resistive bridge or thermocouple applications. Additionally, these devices integrate a low-drift, 2.5-V reference that reduces printed circuit board (PCB) area. Finally, two programmable excitation current sources (IDACs) allow for easy and accurate RTD biasing.

An input multiplexer supports 12 inputs for the ADS124S08 and six inputs for the ADS124S06 that can be connected to the ADC in any combination for design flexibility. In addition, these devices include features such as sensor burn-out detection, voltage bias for thermocouples, system monitoring, and four general-purpose I/Os.

The devices are offered in a leadless VQFN-32 or a TQFP-32 package.

Features

  • Low Power Consumption: As Low as 280 µA
  • Low-Noise PGA: 19 nVRMS at Gain = 128
  • Programmable Gain: 1 to 128
  • Programmable Data Rates: 2.5 SPS to 4 kSPS
  • Simultaneous 50-Hz and 60-Hz Rejection at
    ≤ 20 SPS with Low-Latency Digital Filter
  • Analog Multiplexer with 12 (ADS124S08) or 6 (ADS124S06) Independently Selectable Inputs
  • Dual-Matched Programmable Current Sources for Sensor Excitation: 10 µA to 2000 µA
  • Internal Reference: 2.5 V, 10 ppm/°C (max) Drift
  • Internal Oscillator: 4.096 MHz, 1.5% Accuracy
  • Internal Temperature Sensor
  • Extended Fault Detection Circuits
  • Self Offset and System Calibration
  • Four General-Purpose I/Os
  • SPI-Compatible Interface with Optional CRC
  • Analog Supply: Unipolar (2.7 V to 5.25 V) or Bipolar (±2.5 V)
  • Digital Supply: 2.7 V to 3.6 V
  • Operating Temperature: –50°C to +125°C

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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)
Rating
ADS124S08 ADS1220 ADS1248 ADS125H02 ADS1261 ADS1262
24     24     24     24     24     32    
4     2     2     19.2     40     38    
12     4     8     2     10     10    
SPI     SPI     SPI     SPI     SPI     SPI    
-50 to 125     -40 to 125       -40 to 125     -40 to 125     -40 to 125    
TQFP | 32
VQFN | 32    
TSSOP | 16
VQFN | 16    
TSSOP | 28     VQFN | 32     VQFN | 32     TSSOP | 28    
5.25 | 1ku     3.95 | 1ku     4.95 | 1ku     8.90 | 1ku     6.80 | 1ku     8.90 | 1ku    
1.75     1.4     2.3     45     24     27    
32TQFP: 49 mm2: 7 x 7 (TQFP | 32)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)
16VQFN: 12 mm2: 3.5 x 3.5 (VQFN | 16)    
28TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP | 28)     32VQFN: 25 mm2: 5 x 5 (VQFN | 32)     32VQFN: 25 mm2: 5 x 5 (VQFN | 32)     28TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP | 28)    
Delta-Sigma     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    
Differential
Single-Ended    
Multiplexed     Multiplexed     Multiplexed     Multiplexed     Multiplexed     Multiplexed    
Ext
Int    
Ext
Int
Supply    
Ext
Int    
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    
50/60 Hz Rejection
Excitation Current Sources (iDACs)
GPIO
Oscillator
PGA
Temp Sensor    
2.625
5.25    
2.85
5.6    
2.125
4.25    
15.5     2.5
5    
2.5
5    
-2.625
0    
-2.85
0    
-2.125
0    
0     -2.5
0    
-2.5
0    
2.7     2.3     2.7     -18
0    
-2.5
4.75    
4.75    
5.25     5.5     5.25     18
36    
2.5
5.25    
5.25    
2.7     2.3     2.7     2.7     2.7     2.7    
3.6     5.5     5.25     5.25     5.25     5.25    
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