Overview
The ADS1100, produced by Texas Instruments, is a precision, continuously self-calibrating Analog-to-Digital (A/D) converter. It features differential inputs and up to 16 bits of resolution, making it suitable for high-resolution measurement applications where space and power consumption are critical. The device is packaged in a small SOT23-6 package and operates from a single power supply ranging from 2.7V to 5.5V. It uses an I2C-compatible serial interface and includes an onboard Programmable Gain Amplifier (PGA) with gains of up to 8, allowing for the measurement of smaller signals with high resolution.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Power-Supply Voltage (VDD) | 2.7 | 5.5 | V | |
| Supply Current (Active Mode) | 90 | 150 | µA | |
| Supply Current (Power Down) | 0.05 | 2 | µA | |
| Full-Scale Input Voltage (VIN+ - VIN-) | ±VDD/PGA | V | ||
| Differential Input Impedance | 2.4/PGA | MΩ | ||
| Common-Mode Input Impedance | 8 | MΩ | ||
| Resolution | 12, 14, 15, 16 | Bits | ||
| Data Rates | 8, 16, 32, 128 | SPS | ||
| PGA Gains | 1, 2, 4, 8 | |||
| Operating Temperature Range | -40 | 85 | °C |
Key Features
- Continuously self-calibrating delta-sigma A/D converter with up to 16 bits of resolution.
- Differential inputs with programmable gain amplifier (PGA) offering gains of up to 8.
- I2C-compatible serial interface supporting multiple devices and masters on a single bus.
- Single power supply operation from 2.7V to 5.5V.
- Low power consumption with automatic power-down after single conversion, reducing current consumption during idle periods.
- Onboard clock generator driving the modulator and digital filter.
- Support for data rates of 8, 16, 32, or 128 samples per second.
- Compact SOT23-6 package.
Applications
- High-resolution measurement applications where space and power consumption are critical.
- Industrial automation and control systems.
- Medical devices requiring precise analog-to-digital conversion.
- Automotive systems needing robust and low-power A/D conversion.
- Environmental monitoring and sensing applications.
Q & A
- What is the resolution of the ADS1100 A/D converter?
The ADS1100 offers resolutions of up to 16 bits, depending on the configuration settings.
- What are the available data rates for the ADS1100?
The ADS1100 supports data rates of 8, 16, 32, or 128 samples per second.
- What is the power supply range for the ADS1100?
The ADS1100 operates from a single power supply ranging from 2.7V to 5.5V.
- Does the ADS1100 have an onboard clock generator?
Yes, the ADS1100 features an onboard clock generator that drives the operation of the modulator and digital filter.
- What is the purpose of the Programmable Gain Amplifier (PGA) in the ADS1100?
The PGA allows smaller signals to be measured with high resolution by offering gains of up to 8.
- How does the ADS1100 manage power consumption during idle periods?
The ADS1100 automatically powers down after a single conversion, greatly reducing current consumption during idle periods.
- What type of serial interface does the ADS1100 use?
The ADS1100 uses an I2C-compatible serial interface.
- What is the typical differential input impedance of the ADS1100?
The differential input impedance is typically 2.4 MΩ divided by the PGA setting.
- Does the ADS1100 support multiple devices on a single bus?
Yes, the I2C interface of the ADS1100 supports multiple devices and masters on a single bus.
- How does the self-calibration system of the ADS1100 work?
The self-calibration system operates continuously and requires no user intervention, compensating for gain and offset errors in the modulator.
