Overview
The LTC2492CDE#PBF is a 24-bit, 2-/4-channel delta-sigma analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This device is notable for its Easy Drive technology, which eliminates dynamic input current errors and the shortcomings of on-chip buffering through automatic cancellation of differential input current. This allows for the direct digitization of high impedance sensors and rail-to-rail input signals while maintaining exceptional DC accuracy. The LTC2492 also includes a high accuracy temperature sensor and an integrated oscillator, making it versatile for various measurement applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24 bits |
| Number of Channels | 2 differential or 4 single-ended |
| Input Type | Single-ended or differential |
| Input Current Cancellation | Automatic cancellation of differential input current |
| Noise | 600 nV RMS |
| Integral Non-Linearity (INL) | 2 ppm |
| Offset Error | 1 ppm |
| Full-Scale Error | 15 ppm |
| Temperature Sensor Accuracy | 2°C absolute accuracy, 1/30th°C resolution |
| Common Mode Input Range | 0V to VCC |
| Supply Voltage | 2.7V to 5.5V |
| Package | 14-Lead DFN (4mm x 3mm w/ EP) |
Key Features
- No Latency: Digital filter settles in a single cycle, even after a new channel is selected.
- Easy Drive Technology: Enables rail-to-rail inputs with zero differential input current.
- High Accuracy Temperature Sensor: Integrated temperature sensor with 2°C absolute accuracy and 1/30th°C resolution.
- Programmable Line Frequency Rejection: Can be programmed to reject 50Hz, 60Hz, or simultaneous 50Hz/60Hz line frequencies.
- Configurable Output Rate: Can be configured to double the output rate.
- Low Power Modes: 2x speed mode/reduced power mode available.
Applications
- Instrumentation: Suitable for precision measurement instruments.
- Industrial Process Control: Used in industrial automation and process control systems.
- Data Acquisition Systems: Ideal for data acquisition systems requiring high accuracy and low noise.
- Temperature Measurement: Utilizes the integrated high accuracy temperature sensor for precise temperature measurements.
Q & A
- What is the resolution of the LTC2492CDE#PBF ADC?
The LTC2492CDE#PBF has a resolution of 24 bits. - How many channels does the LTC2492CDE#PBF support?
The device supports 2 differential or 4 single-ended channels. - What is the input current cancellation feature of the LTC2492CDE#PBF?
The device features automatic cancellation of differential input current, eliminating dynamic input current errors. - What is the noise level of the LTC2492CDE#PBF?
The noise level is 600 nV RMS. - What is the accuracy of the integrated temperature sensor?
The temperature sensor has an absolute accuracy of 2°C and a resolution of 1/30th°C. - Can the LTC2492CDE#PBF reject line frequencies?
Yes, it can be programmed to reject 50Hz, 60Hz, or simultaneous 50Hz/60Hz line frequencies. - What is the supply voltage range of the LTC2492CDE#PBF?
The supply voltage range is from 2.7V to 5.5V. - What package options are available for the LTC2492CDE#PBF?
The device is available in a 14-Lead DFN (4mm x 3mm w/ EP) package. - Does the LTC2492CDE#PBF have any low power modes?
Yes, it has a 2x speed mode/reduced power mode. - What are some common applications of the LTC2492CDE#PBF?
Common applications include instrumentation, industrial process control, data acquisition systems, and temperature measurement.
