LTC2499
PRODUCTION24-Bit 8-/16-Channel ΔΣ ADC with Easy Drive Input Current Cancellation and I2C Interface
- Part Models
- 4
- 1ku List Price
- Starting From $4.13
Part Details
- 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.
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
Device Drivers 2
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 |
|---|---|---|---|
| LTC2499CUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC2499CUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC2499IUHF#PBF | 38-Lead QFN (5mm x 7mm w/ EP) | ||
| LTC2499IUHF#TRPBF | 38-Lead QFN (5mm x 7mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 2
Evaluation Software 0
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Digital Temperature Sensors 1 | ||
| LTC2991 | RECOMMENDED FOR NEW DESIGNS | Octal I2C Voltage, Current, and Temperature Monitor |
| Precision Resistor Network 1 | ||
| LT5400 | RECOMMENDED FOR NEW DESIGNS | Quad Matched Resistor Network |
| Serial Bus Buffers, Extenders, and Accelerators 1 | ||
| LTC4317 | PRODUCTION | Dual I2C/SMBus Address Translator |
| 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 5
LTpowerPlay®
LTpowerPlay® is a powerful, Windows-based development environment supporting Linear Technology's Digital Power System Management (PSM) products.
Open ToolLinduino 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
LTC2499 Demo Board | 24-Bit 8-Ch I2C ΔΣ ADC (requires DC2026)