商品描述
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
Applications
• Temperature Sensor Measurements:
– Thermistors
– Thermocouples
– Resistance Temperature Detectors (RTDs):
2-, 3-, or 4-Wire Types
• Resistive Bridge Sensor Measurements:
– Pressure Sensors
– Strain Gauges
– Weigh Scales
• Portable Instrumentation
• Factory Automation and Process Control
Specifications
Product Category: | Analog to Digital Converters - ADC |
Manufacturer: | Texas Instruments |
RoHS: |  Details
|
Series: | ADS1220 |
Mounting Style: | SMD/SMT |
Package / Case: | TSSOP-16 |
Resolution: | 24 bit |
Number of Channels: | 4 Channel |
Sampling Rate: | 2 kS/s |
Input Type: | Differential/Single-Ended |
Interface Type: | Serial, SPI |
Architecture: | Sigma-Delta |
Reference Type: | External, Internal, Supply |
Analog Supply Voltage: | 2.3 V to 5.5 V |
Digital Supply Voltage: | 2.3 V to 5.5 V |
Maximum Operating Temperature: | + 125 C |
Minimum Operating Temperature: | - 40 C |
Packaging: | Tube |
Brand: | Texas Instruments |
Development Kit: | ADS1220EVM |
Features: | PGA, Current Sources (iDACs), Internal Reference, Oscillator, 50/60 Hz Rejection, Single Cycle Settling, Temp Sensor |
INL - Integral Nonlinearity: | 0.0015 % |
Moisture Sensitive: | Yes |
Operating Supply Voltage: | 2.3 V to 5.5 V |
Pd - Power Dissipation: | 1.4 mW |
Power Consumption: | 1.4 mW |
Product: | Analog to Digital Converters |
Reference Voltage: | 2.5 V |
Unit Weight: | 63 mg |
Documents:
Datasheet
Details
