LTC2421
PRODUCTION1-/2-Channel 20-Bit µPower No Latency ∆Σ™ ADCs in MSOP-10
- Part Models
- 4
- 1ku List Price
- Starting From $5.71
Part Details
- 20-Bit ADCs in Tiny MSOP-10 Packages
- 1- or 2-Channel Inputs
- Single Supply 2.7V to 5.5V Operation
- Low Supply Current (200µA) and Auto Shutdown
- Automatic Channel Selection (Ping-Pong) (LTC2422)
- No Latency: Digital Filter Settles in a Single Conversion Cycle
- 8ppm INL, No Missing Codes
- 4ppm Full-Scale Error
- 0.5ppm Offset
- 1.2ppm Noise
- Zero Scale and Full Scale Set for Reference and Ground Sensing
- Internal Oscillator—No External Components Required
- 110dB Min, 50Hz/60Hz Notch Filter
- Reference Input Voltage: 0.1V to VCC
- Live Zero—Extended Input Range Accommodates 12.5% Overrange and Underrange
- Pin Compatible with LTC2401/LTC2402
The LTC2421/LTC2422 are 1- and 2-channel 2.7V to 5.5V micropower 20-bit analog-to-digital converters with an integrated oscillator, 8ppm INL and 1.2ppm RMS noise. These ultrasmall devices use delta-sigma technology and a new digital filter architecture that settles in a single cycle. This eliminates the latency found in conventional ∆Σ converters and simplifies multiplexed applications.
Through a single pin, the LTC2421/LTC2422 can be configured for better than 110dB rejection at 50Hz or 60Hz ±2%, or can be driven by an external oscillator for a user defined rejection frequency in the range 1Hz to 120Hz. The internal oscillator requires no external frequency setting components.
These converters accept an external reference voltage from 0.1V to VCC. With an extended input conversion range of –12.5% VREF to 112.5% VREF (VREF = FSSET – ZSSET), the LTC2421/LTC2422 smoothly resolve the offset and overrange problems of preceding sensors or signal conditioning circuits.
The LTC2421/LTC2422 communicate through a 2- or 3-wire digital interface that is compatible with SPI and MICROWIRE™ protocols.
Applications
- Weight Scales
- Direct Temperature Measurement
- Gas Analyzers
- Strain Gauge Transducers
- Instrumentation
- Data Acquisition
- Industrial Process Control
Documentation
Data Sheet 1
Reliability Data 1
Application Note 2
Design Note 3
Product Selector Card 1
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 |
|---|---|---|---|
| LTC2421CMS#PBF | 10-Lead MSOP | ||
| LTC2421CMS#TRPBF | 10-Lead MSOP | ||
| LTC2421IMS#PBF | 10-Lead MSOP | ||
| LTC2421IMS#TRPBF | 10-Lead MSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 5, 2024 - 24_0004 Epoxy Change from Henkel 8290 to 8290A for MSOP (3) |
||
| LTC2421CMS#PBF | PRODUCTION | |
| LTC2421CMS#TRPBF | PRODUCTION | |
| LTC2421IMS#PBF | PRODUCTION | |
| LTC2421IMS#TRPBF | PRODUCTION | |
|
Feb 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC2421CMS#PBF | PRODUCTION | |
| LTC2421CMS#TRPBF | PRODUCTION | |
| LTC2421IMS#PBF | PRODUCTION | |
| LTC2421IMS#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 |
| 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.