Overview
The LTC2452CDDB#TRMPBF, produced by Analog Devices Inc., is an ultra-tiny, fully differential, 16-bit delta-sigma analog-to-digital converter (ADC). This device is designed for high accuracy and low power consumption, making it suitable for a variety of applications requiring precise analog-to-digital conversion. The LTC2452 uses a single 2.7V to 5.5V supply and communicates through a simple 3-wire SPI interface. It is available in an 8-pin, 3mm × 2mm DFN package, offering a compact solution for space-constrained designs.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 16-bit (including sign), no missing codes |
| Input Range | Differential input voltage range up to ±VREF |
| Supply Voltage | 2.7V to 5.5V |
| Conversion Rate | 60 conversions per second |
| Offset Error | ±2LSB |
| Full-Scale Error | ±4LSB |
| Supply Current | 800µA (active), 0.2µA (sleep) |
| Package | 8-Lead DFN (3mm × 2mm w/ EP) |
| Interface | 3-wire SPI |
Key Features
- Ultra-tiny package (3mm × 2mm DFN or TSOT-23) for space-constrained designs.
- Integrated oscillator requiring no external components.
- Proprietary input sampling scheme reducing average input sampling current significantly.
- Negligible current leakage between input pins.
- No latency for multiplexed applications.
- Continuous internal offset and full-scale calibration algorithms ensuring accuracy over time and temperature.
- Automatic sleep mode reducing supply current to less than 0.2µA after a single conversion.
- Low power consumption: less than 50µW from a 2.7V supply when reading the ADC once a second.
Applications
The LTC2452 is suitable for various applications requiring high accuracy and low power consumption, such as:
- Industrial automation and control systems.
- Medical devices and diagnostic equipment.
- Aerospace and defense systems.
- Automotive systems, especially those requiring precise sensor data.
- Portable and battery-powered devices where low power consumption is critical.
Q & A
- What is the resolution of the LTC2452 ADC?
The LTC2452 has a 16-bit resolution, including sign, with no missing codes.
- What is the input voltage range of the LTC2452?
The differential input voltage range can extend up to ±VREF.
- What is the supply voltage range for the LTC2452?
The LTC2452 operates on a single supply voltage from 2.7V to 5.5V.
- How many conversions per second can the LTC2452 perform?
The LTC2452 can perform 60 conversions per second.
- What is the offset error of the LTC2452?
The offset error is ±2LSB.
- What is the full-scale error of the LTC2452?
The full-scale error is ±4LSB.
- How much current does the LTC2452 consume in active and sleep modes?
The LTC2452 consumes 800µA in active mode and less than 0.2µA in sleep mode.
- What type of interface does the LTC2452 use?
The LTC2452 communicates through a 3-wire SPI interface.
- Does the LTC2452 require any external components for its oscillator?
No, the LTC2452 includes an integrated oscillator that does not require any external components.
- How does the LTC2452 manage power consumption after a single conversion?
After a single conversion, the LTC2452 can automatically enter a sleep mode and reduce its supply current to less than 0.2µA.
