LTC2494 - 16-Bit 8-/16-Channel Delta Sigma ADC with PGA and Easy Drive Input Current Cancellation
Features
- Up to 8 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
- 600nVRMS Noise
- Programmable Gain from 1 to 256
- 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
- Internal Oscillator
- Tiny 5mm × 7mm QFN Package
Typical Application
Description
The LTC2494 is a 16-channel (8-differential), 16-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 LTC2494 includes programmable gain, 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 1/2°C resolution and 2°C absolute accuracy. The LTC2494 can be configured to provide a programmable gain from 1 to 256 in 8 steps.
The LTC2494 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.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC2494CUHF#PBF | 5x7 QFN-38 | UHF | C | 05-08-1701 | Yes |
| LTC2494CUHF#TRPBF | 5x7 QFN-38 | UHF | C | 05-08-1701 | Yes |
| LTC2494IUHF#PBF | 5x7 QFN-38 | UHF | I | 05-08-1701 | Yes |
| LTC2494IUHF#TRPBF | 5x7 QFN-38 | UHF | I | 05-08-1701 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC2494CUHF#PBF | 5x7 QFN-38 | C | $4.17 | $2.85 | Yes | |
| LTC2494CUHF#TRPBF | 5x7 QFN-38 | C | $4.23 | $2.91 | Yes | |
| LTC2494IUHF#PBF | 5x7 QFN-38 | I | $5.01 | $3.42 | Yes | |
| LTC2494IUHF#TRPBF | 5x7 QFN-38 | I | $5.07 | $3.48 | Yes | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1011A-C | LTC2494 16-bit, 8-ch Easy Drive ADC with Temp Sensor, PGA (req DC590B) | $50.00 | |
| Buy Now | |||
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC2026C | Linduino One Isolated USB Demo Board: An Arduino- and QuikEval-Compatible Code Development Platform | $75.00 | |
| DC590B | Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards | $50.00 | |
| Buy Now | |||
Applications
- Direct Sensor Digitizer
- Direct Temperature Measurement
- Instrumentation
- Industrial Process Control
People Who Viewed This Product Also Viewed
- LTC6655 - 0.25ppm Noise, Low Drift Precision References
- LTC2498 - 24-Bit 8-/16-Channel Delta Sigma ADC with Easy Drive Input Current Cancellation
- LT6654 - Precision Wide Supply High Output Drive Low Noise Reference
- LTC2449 - 24-Bit High Speed 8-/16-Channel Delta Sigma ADCs with Selectable Speed/Resolution
- LTC2496 - 16-Bit 8-/16-Channel Delta Sigma ADC with Easy Drive Input Current Cancellation
- LTC4365 - Overvoltage, Undervoltage and Reverse Supply Protection Controller
- LTC2440 - 24-Bit High Speed Differential Delta Sigma ADC with Selectable Speed/Resolution
- LTC6915 - Zero Drift, Precision Instrumentation Amplifier with Digitally Programmable Gain
- LT1763 - 500mA, Low Noise, LDO Micropower Regulators
- LT1761 - 100mA, Low Noise, LDO Micropower Regulators in TSOT-23
Product Notifications
Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.
Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.
Design Tools
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:
- LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
- LTpowerCAD - A complete power supply selection, synthesis and design tool
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
