Overview
The ADS1158IRTCTG4 is a 16-channel, low-noise, 16-bit delta-sigma (ΔΣ) analog-to-digital converter (ADC) produced by Texas Instruments. This device is designed to provide single-cycle settled data at channel scan rates ranging from 1.8k to 23.7k samples per second (SPS) per channel. It features a flexible input multiplexer that accepts combinations of eight differential or 16 single-ended inputs, with a full-scale differential range of 5V or a true bipolar range of ±2.5V when operating with a 5V reference.
The ADS1158 utilizes a fourth-order delta-sigma modulator followed by a fifth-order sinc digital filter, optimized for low-noise performance. The device includes internal system monitor registers for supply voltage, temperature, reference voltage, gain, and offset data, and it operates from a unipolar +5V or bipolar ±2.5V analog supply and a digital supply compatible with interfaces ranging from 2.7V to 5.25V.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16 bits |
| Number of Channels | 16 (multiplexed) |
| Sample Rate | 1.8k to 23.7k SPS per channel |
| Input Type | 8 differential or 16 single-ended |
| Full-Scale Range | 5V differential or ±2.5V bipolar |
| Analog Supply Voltage | +5V (unipolar) or ±2.5V (bipolar) |
| Digital Supply Voltage | 2.7V to 5.25V |
| Power Dissipation | 42mW |
| Operating Temperature Range | -40°C to 105°C |
| Package | QFN-48 |
Key Features
- 16 bits, no missing codes
- Fixed-channel or automatic channel scan
- Single-conversion settled data
- Unipolar (+5V) or bipolar (±2.5V) operation
- 0.3LSB (INL) integral non-linearity
- DC stability: 1µV/°C offset drift, 2ppm/°C gain drift
- Open-sensor detection
- Conversion control pin
- Multiplexer output for external signal conditioning
- On-chip temperature, reference, offset, gain, and supply voltage readback
- Standby, sleep, and power-down modes
- Eight general-purpose inputs/outputs (GPIO)
- 32.768kHz crystal oscillator or external clock
- Programmable sensor bias current sources
- SPI™-compatible interface
Applications
- Medical, avionics, and process control systems
- Machine and system monitoring
- Fast scan multi-channel instrumentation
- Industrial systems
- Test and measurement systems
Q & A
- What is the resolution of the ADS1158?
The ADS1158 has a resolution of 16 bits.
- How many channels does the ADS1158 support?
The ADS1158 supports 16 channels (multiplexed).
- What are the sample rates for the ADS1158?
The sample rates range from 1.8k to 23.7k samples per second (SPS) per channel.
- What types of inputs does the ADS1158 accept?
The ADS1158 accepts combinations of eight differential or 16 single-ended inputs.
- What is the full-scale range of the ADS1158?
The full-scale range is 5V differential or ±2.5V bipolar.
- What are the power supply requirements for the ADS1158?
The ADS1158 operates from a unipolar +5V or bipolar ±2.5V analog supply and a digital supply compatible with interfaces ranging from 2.7V to 5.25V.
- What is the power dissipation of the ADS1158?
The power dissipation is 42mW.
- What is the operating temperature range of the ADS1158?
The operating temperature range is -40°C to 105°C.
- What package is the ADS1158 available in?
The ADS1158 is available in a QFN-48 package.
- Does the ADS1158 support external signal conditioning?
