LTC2440
PRODUCTION24-Bit High Speed Differential ∆∑ ADC with Selectable Speed/Resolution
- Part Models
- 4
- 1ku List Price
- Starting From $7.52
Overview
- Up to 3.5kHz Output Rate
- Selectable Speed/Resolution
- 2µVRMS Noise at 880Hz Output Rate
- 200nVRMS Noise at 6.9Hz Output Rate with Simultaneous 50/60Hz Rejection
- 0.0005% INL, No Missing Codes
- Autosleep Enables 20µA Operation at 6.9Hz
- < 5µV Offset (4.5V < VCC < 5.5V, –40°C to 85°C)
- Differential Input and Differential Reference with GND to VCC Common Mode Range
- No Latency, Each Conversion is Accurate Even After an Input Step
- Internal Oscillator—No External Components
- Pin Compatible with the LTC2410
- 24-Bit ADC in Narrow 16-Lead SSOP Package
The LTC2440 is a high speed 24-bit No Latency ∆∑™ ADC with 5ppm INL and 5µV offset. It uses proprietary Delta Sigma architecture enabling variable speed and resolution with no latency. Ten speed/resolution combinations (6.9Hz/ 200nVRMS to 3.5kHz/25µVRMS) are programmed through a simple serial interface. Alternatively, by tying a single pin HIGH or LOW, a fast (880Hz/2µVRMS) or ultralow noise (6.9Hz, 200nVRMS, 50/60Hz rejection) speed/resolution combination can be easily selected. The accuracy (offset, full-scale, linearity, drift) and power dissipation are independent of the speed selected. Since there is no latency, a speed/resolution change may be made between conversions with no degradation in performance.
Following each conversion cycle, the LTC2440 automatically enters a low power sleep state. Power dissipation may be reduced by increasing the duration of this sleep state. For example, running at the 3.5kHz conversion speed but reading data at a 100Hz rate draws 240µA average current (1.1mW) while reading data at a 7Hz output rate draws only 25µA (125µW).The LTC2440 communicates through a flexible 3-wire or 4-wire digital interface that is compatible with the LTC2410 and is available in a narrow 16-lead SSOP package.
Applications
- High Speed Multiplexing
- Weight Scales
- Auto Ranging 6-Digit DVMs
- Direct Temperature Measurement
- High Speed Data Acquisition
Documentation
Data Sheet 1
Reliability Data 1
User Guide 1
Application 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 |
|---|---|---|---|
| LTC2440CGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC2440CGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC2440IGN#PBF | 16-Lead SSOP (Narrow 0.15 Inch) | ||
| LTC2440IGN#TRPBF | 16-Lead SSOP (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking |
||
| LTC2440CGN#PBF | PRODUCTION | |
| LTC2440CGN#TRPBF | PRODUCTION | |
| LTC2440IGN#PBF | PRODUCTION | |
| LTC2440IGN#TRPBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package |
||
| LTC2440CGN#PBF | PRODUCTION | |
| LTC2440CGN#TRPBF | PRODUCTION | |
| LTC2440IGN#PBF | PRODUCTION | |
| LTC2440IGN#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG] |
||
| LTC2440CGN#PBF | PRODUCTION | |
| LTC2440CGN#TRPBF | PRODUCTION | |
| LTC2440IGN#PBF | PRODUCTION | |
| LTC2440IGN#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Current Mirrors & Matched Devices 1 | ||
| LT5400 | RECOMMENDED FOR NEW DESIGNS | Quad Matched Resistor Network |
| Interface Transceivers & Isolators 2 | ||
| LTM2883 | PRODUCTION | SPI/Digital or I2C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power |
| LTM2893 | PRODUCTION | 100MHz Isolated ADC Serial Interface |
| Oscillators 1 | ||
| LTC6991 | PRODUCTION | TimerBlox: Resettable, Low Frequency Oscillator |
| Voltage References 1 | ||
| LTC6655 | PRODUCTION | 0.25ppm Noise, Low Drift Precision References |
Tools & Simulations
Linduino 5
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.
Evaluation Kits
LTC2440CGN Demo Board | High Speed Delta Sigma ADC, (Requires DC2026)