ADS122C04 (ACTIVE)

24-Bit, 2kSPS, 4-Ch, Low-Power Delta-Sigma ADC w/ PGA, Voltage Reference, 2x IDACs & I2C Interface

 24-Bit, 2kSPS, 4-Ch, Low-Power Delta-Sigma ADC w/ PGA, Voltage Reference, 2x IDACs & I2C Interface - ADS122C04
 

Description

The ADS122C04 is a precision, 24-bit, analog-to-digital converter (ADC) that offers many integrated features to reduce system cost and component count in applications measuring small sensor signals. The device features two differential or four single-ended inputs through a flexible input multiplexer (MUX), a low-noise, programmable gain amplifier (PGA), two programmable excitation current sources, a voltage reference, an oscillator, and a precision temperature sensor.

The device can perform conversions at data rates up to 2000 samples-per-second (SPS) with single-cycle settling. At 20 SPS, the digital filter offers simultaneous 50-Hz and 60-Hz rejection for noisy industrial applications. The internal PGA offers gains up to 128. This PGA makes the ADS122C04 ideally suited for applications measuring small sensor signals, such as resistance temperature detectors (RTDs), thermocouples, thermistors, and resistive bridge sensors.

The ADS122C04 features a 2-wire, I2C-compatible interface that supports I2C bus speeds up to 1 Mbps. Two address pins allow selection of 16 different I2C addresses for the device.

The ADS122C04 is offered in a leadless 16-pin WQFN or a 16-pin TSSOP package and is specified over a temperature range of –40°C to +125°C.

Features

  • Current Consumption as Low as 315 µA (typ)
  • Wide Supply Range: 2.3 V to 5.5 V
  • Programmable Gain: 1 to 128
  • Programmable Data Rates: Up to 2 kSPS
  • Up to 20 Bits Effective Resolution
  • Simultaneous 50-Hz and 60-Hz Rejection at 20 SPS With Single-Cycle Settling Digital Filter
  • Two Differential or Four Single-Ended Inputs
  • Dual-Matched Programmable Current Sources:
    10 µA to 1.5 mA
  • Internal 2.048-V Reference: 5 ppm/°C (typ) Drift
  • Internal 2% Accurate Oscillator
  • Internal Temperature Sensor:
    0.5°C (typ) Accuracy
  • I2C-Compatible Interface
  • Supported I2C Bus Speed Modes:
    Standard-Mode, Fast-Mode, Fast-Mode Plus
  • 16 Pin-Configurable I2C Addresses
  • Package: 3.0-mm × 3.0-mm × 0.75-mm WQFN

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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)
Sample Rate (Max) (MSPS)
ADS122C04 ADS1220 ADS122U04 ADS1247
24    24    24    24   
2    2    2    2   
4    4    4    4   
I2C    SPI    UART    SPI   
-40 to 125    -40 to 125    -40 to 125    -40 to 105   
TSSOP
WQFN   
TSSOP
VQFN   
TSSOP
WQFN   
TSSOP   
3.95 | 1ku    3.95 | 1ku    3.95 | 1ku    4.45 | 1ku   
1.4    1.4    1.4    2.3   
16TSSOP: 32 mm2: 6.4 x 5(TSSOP)
16WQFN: 9 mm2: 3 x 3(WQFN)   
16TSSOP: 32 mm2: 6.4 x 5(TSSOP)
16VQFN: 12 mm2: 3.5 x 3.5(VQFN)   
16TSSOP: 32 mm2: 6.4 x 5(TSSOP)
16WQFN: 9 mm2: 3 x 3(WQFN)   
20TSSOP: 42 mm2: 6.4 x 6.5(TSSOP)   
Delta-Sigma    Delta-Sigma    Delta-Sigma    Delta-Sigma   
Differential
Single-Ended   
Differential
Single-Ended   
Differential
Single-Ended   
Differential
Single-Ended   
Multiplexed    Multiplexed    Multiplexed    Multiplexed   
Ext
Int   
Ext
Int
Supply   
Ext
Int   
Ext
Int   
50/60 Hz Rejection
Excitation Current Sources (iDACs)
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   
2.85
5.6   
2.85
5.6   
2.85
5.6   
2.125
4.25   
-2.85
0   
-2.85
0   
-2.85
0   
-2.125
0   
2.3    2.3    2.3    2.7   
5.5    5.5    5.5    5.25   
2.3    2.3    2.3    2.7   
5.5    5.5    5.5    5.25   
  251.7      251.7   
0.002    0.002    0.002    0.002