LTC2492
PRODUCTION24-Bit 2-/4-Channel ΔΣ ADC with Easy Drive Input Current Cancellation
- Part Models
- 4
- 1ku List Price
- Starting From $3.54
Part Details
- Up to 2 Differential or 4 Single-Ended Inputs
- Easy Drive™ Technology Enables Rail-to-Rail Inputs with Zero Differential Input Current
- Directly Digitizes High Impedance Sensors with Full Accuracy
- 600nVRMS Noise
- Integrated High Accuracy Temperature Sensor
- GND to VCC Input/Reference Common Mode Range
- Programmable 50Hz, 60Hz, or Simultaneous 50Hz/60Hz Rejection Mode
- 2ppm INL, No Missing Codes
- 1ppm Offset and 15ppm Full-Scale Error
- 2x Speed Mode/Reduced Power Mode (15Hz Using Internal Oscillator and 80μA at 7.5Hz Output)
- No Latency: Digital Filter Settles in a Single Cycle, Even After a New Channel is Selected
- Single Supply 2.7V to 5.5V Operation (0.8mW)
- Internal Oscillator
- Tiny DFN 4mm × 3mm Package
The LTC2492 is a 4-channel (2-channel differential), 24-bit, No Latency ΔΣ™ ADC with Easy Drive technology. The patented sampling scheme eliminates dynamic input current errors and the shortcomings of on-chip buffering through automatic cancellation of differential input current. This allows large external source impedances and rail-to-rail input signals to be directly digitized while maintaining exceptional DC accuracy.
The LTC2492 includes a high accuracy temperature sensor and an integrated oscillator. This device can be configured to measure an external signal (from combinations of 4 analog input channels operating in single-ended or differential modes) 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. The integrated temperature sensor offers 1/30th°C resolution and 2°C absolute accuracy.
The LTC2492 allows a wide common mode input range (0V to VCC), independent of the reference voltage. Any combination of single-ended or differential inputs can be selected and the first conversion after a new channel selection is valid.
Applications
- Direct Sensor Digitizer
- Direct Temperature Measurement
- Instrumentation
- Industrial Process Control
Documentation
Data Sheet 1
Reliability Data 1
User Guide 1
Design Note 2
Technical Articles 1
Video 1
Product Selector Card 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC2492CDE#PBF | 14-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC2492CDE#TRPBF | 14-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC2492IDE#PBF | 14-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC2492IDE#TRPBF | 14-Lead DFN (4mm x 3mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products |
||
| LTC2492CDE#PBF | PRODUCTION | |
| LTC2492CDE#TRPBF | PRODUCTION | |
| LTC2492IDE#PBF | PRODUCTION | |
| LTC2492IDE#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| I²C Isolators 1 | ||
| LTM2883 | PRODUCTION | SPI/Digital or I2C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power |
| Precision Resistor Network 1 | ||
| LT5400 | RECOMMENDED FOR NEW DESIGNS | Quad Matched Resistor Network |
| Series Voltage References 1 | ||
| LTC6655 | PRODUCTION | 0.25ppm Noise, Low Drift Precision References |
| TimerBlox 1 | ||
| LTC6991 | PRODUCTION | TimerBlox: Resettable, Low Frequency Oscillator |
Tools & Simulations
Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.
Linduino code repository on GitHub and instructions on how to use the code.
Evaluation Kits
LTC2492 24-bit, 2-channel ADC, requires DC590