ADS125H02 24-bit, 40kSPS, 2-ch delta-sigma ADC with ±10V high-voltage input, PGA, 2x IDACs, and low-drift Vref | TI.com

ADS125H02 (PREVIEW)

24-bit, 40kSPS, 2-ch delta-sigma ADC with ±10V high-voltage input, PGA, 2x IDACs, and low-drift Vref

 

Sample availability

Preproduction samples are available (PADS125H02IRHBR). Order now

Description

The ADS125H01 and ADS125H02 (ADS125H0x) are 2-channel, 24-bit, 40-kSPS, delta-sigma (ΔΣ) ADCs with an integrated ±18-V programmable gain amplifier (PGA). The devices also include a voltage reference and features to enhance data reliability such as CRC and signal monitors. The ADCs provide a complete, high-resolution measurement solution over a wide range of common-mode voltage, with differential input voltage ranges from ±7 mV to ±20 V.

The ADCs are comprised of an ±18-V PGA providing gain of 0.125 to 128, a 24-bit ΔΣ modulator, programmable digital filter, and an internal reference.

The PGA inputs are high-impedance (1 GΩ) and accommodate high common-mode voltages with no external attenuation required. The devices support 1 differential or 2 single-ended inputs.

The flexible digital filter is programmable for single-cycle settled conversions while providing simultaneous 50-Hz and 60-Hz line cycle rejection.

Signal and reference monitors, a temperature sensor, and CRC data verification enhance data reliability.

The ADS125H01 and ADS125H02 are pin compatible. The devices are available in a 5-mm × 5-mm VQFN package and are specified over the –40°C to +125°C temperature range.

Features

  • Precision, Wide-Input Range, 24-Bit ΔΣ ADC
  • Differential Input Voltage Range: ±7 mV to ±20 V
  • Absolute Input Voltage Range: ±15.5 V
  • High Impedance PGA: 1 GΩ
  • PGA Gain: 0.125 to 128
  • High Accuracy:
    • Offset Drift: 5 nV/°C
    • Gain Drift: 1 ppm/°C
    • Linearity: 2 ppm
  • Data Rate: 2.5 to 40000 SPS
  • 2.5-V Reference
  • Simultaneous 50-Hz and 60-Hz Rejection Mode
  • Single-Cycle Settling Mode
  • Signal and Reference Voltage Monitors
  • Cyclic Redundancy Check (CRC)
  • Two Reference Inputs (H02)
  • Sensor Excitation Current Sources (H02)
  • Four General-Purpose Inputs/Outputs (H02)
  • 5-mm × 5-mm VQFN Package

All trademarks are the property of their respective owners.

View more

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
ADS125H02 ADS124S08 ADS1261
24     24     24    
19.2     4     40    
2     12     10    
SPI     SPI     SPI    
-40 to 125     -50 to 125     -40 to 125    
VQFN | 32     TQFP | 32
VQFN | 32    
VQFN | 32    
8.90 | 1ku     5.25 | 1ku     6.80 | 1ku    
45     1.75     24    
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)     32TQFP: 49 mm2: 7 x 7 (TQFP | 32)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
Delta-Sigma     Delta-Sigma     Delta-Sigma    
Differential
Single-Ended    
Differential
Single-Ended    
Differential
Single-Ended    
Multiplexed     Multiplexed     Multiplexed    
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)
GPIO
Oscillator
PGA
Temp Sensor    
50/60 Hz Rejection
Excitation Current Sources (iDACs)
GPIO
Oscillator
PGA
Temp Sensor    
15.5     2.625
5.25    
2.5
5    
0     -2.625
0    
-2.5
0    
-18
0    
2.7     -2.5
4.75    
18
36    
5.25     2.5
5.25    
2.7     2.7     2.7    
5.25     3.6     5.25    
Catalog     Catalog     Catalog