ADS1220 (ACTIVE)

24-Bit, 2kSPS, 4-Ch, Low-Power Delta-Sigma ADC w/ PGA & VREF for Small Signal Sensors

24-Bit, 2kSPS, 4-Ch, Low-Power Delta-Sigma ADC w/ PGA & VREF for Small Signal Sensors - ADS1220
 

Description

The ADS1220 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, a low-side switch, 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 V/V. This PGA makes the ADS1220 ideally-suited for applications measuring small sensor signals, such as resistance temperature detectors (RTDs), thermocouples, thermistors, and resistive bridge sensors. The device supports measurements of pseudo- or fully-differential signals when using the PGA. Alternatively, the device can be configured to bypass the internal PGA while still providing high input impedance and gains up to 4 V/V, allowing for single-ended measurements.

Power consumption is as low as 120 µA when operating in duty-cycle mode with the PGA disabled. The ADS1220 is offered in a leadless VQFN-16 or a TSSOP-16 package and is specified over a temperature range of –40°C to +125°C.

Features

  • Low Current Consumption:
    As Low as 120 µA (typ) in Duty-Cycle Mode
  • Wide Supply Range: 2.3 V to 5.5 V
  • Programmable Gain: 1 V/V to 128 V/V
  • 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
  • SPI-Compatible Interface (Mode 1)
  • Package: 3.5-mm × 3.5-mm × 0.9-mm VQFN

View more

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)
Rating
Sample Rate (Max) (MSPS)
ADS1220 ADS122C04 ADS122U04 ADS1247 ADS1248 ADS124S06 ADS124S08 ADS1262
24    24    24    24    24    24    24    32   
2    2    2    2    2    4    4    38   
4    4    4    4    8    6    12    10   
SPI    I2C    UART    SPI    SPI    SPI    SPI    SPI   
-40 to 125    -40 to 125    -40 to 125    -40 to 105    -40 to 105    -50 to 125    -50 to 125    -40 to 125   
TSSOP
VQFN   
TSSOP
WQFN   
TSSOP
WQFN   
TSSOP    TSSOP    TQFP
VQFN   
TQFP
VQFN   
TSSOP   
3.95 | 1ku    3.95 | 1ku    3.95 | 1ku    4.45 | 1ku    4.95 | 1ku    4.75 | 1ku    5.25 | 1ku    8.90 | 1ku   
1.4    1.4    1.4    2.3    2.3    1.75    1.75    27   
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)   
16TSSOP: 32 mm2: 6.4 x 5(TSSOP)
16WQFN: 9 mm2: 3 x 3(WQFN)   
20TSSOP: 42 mm2: 6.4 x 6.5(TSSOP)    28TSSOP: 62 mm2: 6.4 x 9.7(TSSOP)    32TQFP: 49 mm2: 7 x 7(TQFP)
32VQFN: 25 mm2: 5 x 5(VQFN)   
32TQFP: 49 mm2: 7 x 7(TQFP)
32VQFN: 25 mm2: 5 x 5(VQFN)   
28TSSOP: 62 mm2: 6.4 x 9.7(TSSOP)   
Delta-Sigma    Delta-Sigma    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   
Differential
Single-Ended   
Differential
Single-Ended   
Multiplexed    Multiplexed    Multiplexed    Multiplexed    Multiplexed    Multiplexed    Multiplexed    Multiplexed   
Ext
Int
Supply   
Ext
Int   
Ext
Int   
Ext
Int   
Ext
Int   
Ext
Int   
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   
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   
2.85
5.6   
2.85
5.6   
2.85
5.6   
2.125
4.25   
2.125
4.25   
2.625
5.25   
2.625
5.25   
2.5
5   
-2.85
0   
-2.85
0   
-2.85
0   
-2.125
0   
-2.125
0   
-2.625
0   
-2.625
0   
-2.5
0   
2.3    2.3    2.3    2.7    2.7    2.7    2.7    4.75   
5.5    5.5    5.5    5.25    5.25    5.25    5.25    5.25   
2.3    2.3    2.3    2.7    2.7    2.7    2.7    2.7   
5.5    5.5    5.5    5.25    5.25    3.6    3.6    5.25   
251.7        251.7           
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
0.002    0.002    0.002    0.002    0.002    0.004    0.004    0.038   

WEBENCH® Designer ADS1220

Sensor AFE Designer
 RTD
 Thermocouple
 Load