16-bit, 2-kSPS, 4-ch, low-power, small-size delta-sigma ADC with PGA, VREF, 2x IDACs & SPI interface
Product details
Parameters
Package | Pins | Size
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
- 16-Bit Noise-Free Resolution at 20 SPS
- 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:
50 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
Description
The ADS1120 is a precision, 16-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 ADS1120 ideally-suited for applications measuring small sensor signals, such as resistance temperature detectors (RTDs), thermocouples, thermistors, and 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 ADS1120 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.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The ADS1120 evaluation module (EVM) is an evaluation system for the ADS1120, a 16-bit, multichannel, delta-sigma analog-to-digital converter (ADC). The EVM uses the ADS1120 along with minimal circuitry to demonstrate functionality for prototyping and part evaluation. The pins of the ADS1120 are (...)
Features
- Contains all support circuitry needed for ADS1120
- 5-V or 3.3-V power-supply options for ADC
- Voltage reference options: external or onboard
- Easy-to-use evaluation software for Microsoft® Windows™ XP and Windows 7
- Built-in analysis tools including scope, FFT, and histogram displays
- Data collection to text (...)
Software development
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Features
- Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- Noise calculations
- Common unit translation
- Solves common amplifier circuit design problems
- Gain selections using standard resistors
- Filter configurations
- Total noise for common amplifier configurations
- (...)
Reference designs
Design files
-
download 4- to 20-mA Loop-Powered RTD Temperature Transmitter BOM.pdf (44KB) -
download 4- to 20-mA Loop-Powered RTD Temperature Transmitter Assembly Drawing.pdf (107KB) -
download 4- to 20-mA Loop-Powered RTD Temperature Transmitter PCB.pdf (506KB) -
download 4- to 20-mA Loop-Powered RTD Temperature Transmitter CAD Files.zip (490KB) -
download 4- to 20-mA Loop-Powered RTD Temperature Transmitter Gerber.zip (323KB)
This TI Design includes a designed pH front-end, which can be connected directly via its onboard connector to most pH probes used in process control. The performance data was tested and characterized (...)
Design files
-
download TIDA-00561 BOM.pdf (84KB) -
download TIDA-00561 Assembly Drawing.pdf (116KB) -
download TIDA-00561 PCB.pdf (630KB) -
download TIDA-00561 CAD Files.zip (504KB) -
download TIDA-00561 Gerber.zip (208KB)
Design files
-
download TIDA-00095 BOM.zip (23KB) -
download TIDA-00095 Altium.zip (765KB) -
download TIDA-00095 Gerber.zip (2301KB) -
download TIDA-00095 PCB.pdf (1492KB) -
download TIDA-00095 Assembly Drawing.pdf (257KB) -
download TIDA-00095 Fabrication Drawing.pdf (274KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
TSSOP (PW) | 16 | View options |
VQFN (RVA) | 16 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.