LTC2489
PRODUCTION16-Bit 2-/4-Channel ∆Σ ADC with Easy Drive Input Current Cancellation and I2C Interface
- Part Models
- 4
- 1ku List Price
- Starting From $2.99
Overview
- 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
- 2-Wire I2C Interface with 9 Addresses Plus One Global Address for Synchronization
- 600nV RMS Noise (0.02LSB Transition Noise)
- GND to VCC Input/Reference Common Mode Range
- Simultaneous 50Hz/60Hz Rejection
- 2ppm INL, No Missing Codes
- 1ppm Offset and 15ppm Full-Scale Error
- 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 4mm × 3mm DFN Package
The LTC2489 is a 4-channel (2-channel differential), 16-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 LTC2489 includes 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. It automatically rejects line frequencies of 50Hz and 60Hz simultaneously.
The LTC2489 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
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 |
|---|---|---|---|
| LTC2489CDE#PBF | 14-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC2489CDE#TRPBF | 14-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC2489IDE#PBF | 14-Lead DFN (4mm x 3mm w/ EP) | ||
| LTC2489IDE#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 |
||
| LTC2489CDE#PBF | PRODUCTION | |
| LTC2489CDE#TRPBF | PRODUCTION | |
| LTC2489IDE#PBF | PRODUCTION | |
| LTC2489IDE#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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| Pulse-Width Modulation (PWM) & Pulse Generators 1 | ||
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| Temperature Sensors 1 | ||
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| Voltage References 1 | ||
| LT6660 | PRODUCTION | Tiny Micropower Precision Series References in 2mm × 2mm DFN |
Evaluation Kits
LTC2489 | 16-Bit 4/2-Channel I2C Easy Drive ΔΣ ADC (Requires DC590B)