Features and Benefits
- Up to Eight Differential or 16 Single-Ended Inputs
- Easy Drive™ Technology Enables Rail-to-Rail Inputs with Zero Differential Input Current
- Directly Digitizes High Impedance Sensors with Full Accuracy
- 2-Wire I2C Interface with 27 Addresses Plus One Global Address for Synchronization
- 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/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 5mm × 7mm QFN Package
The LTC2499 is a 16-channel (eight differential), 24-bit, No Latency ΔΣ™ ADC with Easy Drive technology and a 2-wire, I2C interface. 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 LTC2499 includes a high accuracy, temperature sensor and an integrated oscillator. This device can be configured to measure an external signal (from combinations of 16 analog input channels operating in single-ended or differential modes) or its internal temperature sensor. The integrated temperature sensor offers 1/30th°C resolution and 2°C absolute accuracy.
The LTC2499 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 is selected, is valid. Access to the multiplexer output enables optional external amplifiers to be shared between all analog inputs and auto calibration continuously removes their associated offset and drift.
- Direct Sensor Digitizer
- Direct Temperature Measurement
- Industrial Process Control
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
R461 Reliability Data3/22/2018
DC1012A - Demo Manual5/30/2013
Easy Drive Delta-Sigma ADCs Deliver Powerful Features and Reduce Design Effort3/1/2007 LT Journal
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.
LTC2499 Companion Parts
Recommended External Voltage References
Recommended Related Parts
Recommended Suggested Oscillator
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 Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LTC2499CUHF#PBF||Material Declaration||Reliability Data||38-Lead QFN (5mm x 7mm w/ EP)|
|LTC2499CUHF#TRPBF||Material Declaration||Reliability Data||38-Lead QFN (5mm x 7mm w/ EP)|
|LTC2499IUHF#PBF||Material Declaration||Reliability Data||38-Lead QFN (5mm x 7mm w/ EP)|
|LTC2499IUHF#TRPBF||Material Declaration||Reliability Data||38-Lead QFN (5mm x 7mm w/ EP)|
|Wafer Fabrication Data||R461 Reliability Data|
Sample & Buy
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.