ADS131M04 24-bit 32-kSPS 4-channel simultaneous-sampling delta-sigma ADC |

ADS131M04 (PREVIEW) 24-bit 32-kSPS 4-channel simultaneous-sampling delta-sigma ADC


Sample availability

Preproduction samples are available (PADS131M04IPWR). Order now


The ADS131M04 is a four-channel, simultaneously-sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) that offers wide dynamic range, low power, and energy-measurement-specific features, making the device excellent for energy metering, power metrology, and circuit breaker applications. The ADC inputs can be directly interfaced to a resistor-divider network or a power transformer to measure voltage or to a current transformer or a Rogowski coil to measure current.

The individual ADC channels can be independently configured depending on the sensor input. A low-noise, programmable gain amplifier (PGA) provides gains ranging from 1 to 128 to amplify low level signals. Additionally, this device integrates channel-to-channel phase calibration and offset and gain calibration registers to help remove signal chain errors.

A low-drift, 1.2-V reference is integrated into the device reducing printed circuit board (PCB) area. Cyclic redundancy check (CRC) options can be individually enabled on the data input, data output, and register map to ensure communication integrity.

The complete analog front-end (AFE) solution is offered in a 20-pin TSSOP or leadless 20-pin WQFN package and is specified over the industrial temperature range of –40°C to +125°C.


  • 4 simultaneously sampling differential inputs
  • Programmable data rate up to 32 kSPS
  • Programmable gain up to 128
  • Noise performance:
    • 101-dB dynamic range at gain = 1, 4 kSPS
    • 81-dB dynamic range at gain = 64, 4 kSPS
  • Total harmonic distortion: –100 dB
  • High-impedance inputs for direct sensor connection:
    • >100-kΩ input impedance for gains = 1, 2, and 4
    • >1-MΩ input impedance for gains = 8, 16, 32, and 64
  • Programmable channel-to-channel phase delay calibration with 244-ns resolution with 8.192-MHz fCLKIN
  • Current detect mode allows for super low power tamper detection
  • Fast startup: first data within 0.5 ms of supply ramp
  • Integrated negative charge pump allows input signals below ground
  • Crosstalk between channels: –110 dB
  • Low-drift internal voltage reference
  • Cyclic redundancy check (CRC) on communications and register map
  • 2.7-V to 3.6-V analog and digital supplies
  • Low power consumption: 3.3 mW at 3-V AVDD and DVDD
  • Package: 20-pin TSSOP or 20-pin WQFN
  • Operating temperature range: –40°C to +125°C

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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) SNR (dB) THD (Typ) (dB) Rating
ADS131M04 Order now 24     32     4     SPI     -40 to 125     TSSOP | 20
WQFN | 20    
2.25 | 1ku     3.3     20TSSOP: 42 mm2: 6.4 x 6.5 (TSSOP | 20)
20WQFN: 9 mm2: 3 x 3 (WQFN | 20)    
Delta-Sigma     Differential     Simultaneous Sampling     Int     Oscillator
Small Size    
    2.7     3.6     2.7     3.6     101     -100     Catalog    
ADS131A04 Order now 24     128     4     SPI     -40 to 125     TQFP | 32     4.15 | 1ku     1.2     32TQFP: 49 mm2: 7 x 7 (TQFP | 32)     Delta-Sigma     Differential
Simultaneous Sampling     Ext
Daisy-Chainable     4.5     -1.5     3     5.5     1.65     3.6     115.2     -100     Catalog    
ADS131E04 Order now 24     64     4     SPI     -40 to 105     TQFP | 64     4.75 | 1ku     6     64TQFP: 144 mm2: 12 x 12 (TQFP | 64)     Delta-Sigma     Differential
Simultaneous Sampling     Ext
4     0     2.7     5.25     1.8     3.6     107     -93     Catalog