Overview
The LTC2492CDE#TRPBF is a 24-bit, 2-/4-channel ΔΣ (Delta-Sigma) Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc. This device is renowned 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 includes a high accuracy temperature sensor and an integrated oscillator, enabling it to measure external signals from combinations of its four analog input channels or its internal temperature sensor. It can be programmed to reject line frequencies of 50Hz, 60Hz, or simultaneous 50Hz/60Hz and configured to double its output rate.
Key Specifications
| Parameter | Specification |
|---|---|
| Resolution | 24 bits |
| Number of Channels | 2 differential or 4 single-ended |
| Input Type | Differential or single-ended |
| Input Current Cancellation | Automatic cancellation of differential input current |
| Noise | 600nV RMS |
| Integral Non-Linearity (INL) | 2ppm |
| Offset Error | 1ppm |
| Full-Scale Error | 15ppm |
| Supply Voltage | 2.7V to 5.5V |
| Common Mode Input Range | 0V to VCC |
| Temperature Sensor Accuracy | 2°C absolute accuracy, 1/30th°C resolution |
| Package Type | 14-Lead DFN (4mm x 3mm w/ EP) |
Key Features
- Easy Drive Technology: Enables rail-to-rail inputs with zero differential input current, eliminating dynamic input current errors and on-chip buffering shortcomings.
- High Accuracy Temperature Sensor: Offers 2°C absolute accuracy and 1/30th°C resolution.
- Integrated Oscillator: Allows for flexible configuration and operation.
- Line Frequency Rejection: Can be programmed to reject 50Hz, 60Hz, or simultaneous 50Hz/60Hz line frequencies.
- No Latency: Digital filter settles in a single cycle, even after a new channel is selected.
- Flexible Operation Modes: Supports 2x speed mode and reduced power mode.
- Wide Common Mode Input Range: 0V to VCC, independent of the reference voltage.
Applications
- Instrumentation: Suitable for precision measurement instruments due to its high accuracy and low noise.
- Industrial Process Control: Ideal for monitoring and controlling industrial processes with high precision.
- Data Acquisition Systems: Used in data acquisition systems that require high-resolution and accurate analog-to-digital conversion.
- Temperature Measurement: The integrated high accuracy temperature sensor makes it suitable for precise temperature measurements.
Q & A
- What is the resolution of the LTC2492CDE#TRPBF ADC?
The LTC2492CDE#TRPBF has a 24-bit resolution.
- How many channels does the LTC2492CDE#TRPBF support?
The device supports up to 2 differential or 4 single-ended channels.
- What is the Easy Drive technology in the LTC2492CDE#TRPBF?
The Easy Drive technology eliminates dynamic input current errors and the shortcomings of on-chip buffering through automatic cancellation of differential input current.
- What is the noise specification of the LTC2492CDE#TRPBF?
The device has a noise specification of 600nV RMS.
- What is the accuracy of the integrated temperature sensor?
The integrated temperature sensor offers 2°C absolute accuracy and 1/30th°C resolution.
- Can the LTC2492CDE#TRPBF reject line frequencies?
Yes, it can be programmed to reject 50Hz, 60Hz, or simultaneous 50Hz/60Hz line frequencies.
- What is the supply voltage range for the LTC2492CDE#TRPBF?
The supply voltage range is from 2.7V to 5.5V.
- What is the common mode input range of the LTC2492CDE#TRPBF?
The common mode input range is from 0V to VCC.
- Does the LTC2492CDE#TRPBF have any latency in its digital filter?
No, the digital filter settles in a single cycle, even after a new channel is selected.
- What are the typical applications of the LTC2492CDE#TRPBF?
Typical applications include instrumentation, industrial process control, data acquisition systems, and precise temperature measurements.
