Overview
The LTC2445IUHF#PBF is a high-performance, 24-bit delta-sigma analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the LTC2444/LTC2445/LTC2448/LTC2449 family, which offers 8- or 16-channel (4- or 8-differential) configurations. It features a proprietary delta-sigma architecture that allows for variable speed and resolution settings, making it highly versatile for various applications.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 24-bit |
| Channels | 8- or 16-channel (4- or 8-differential) |
| Speed/Resolution Combinations | 10 combinations: 6.9Hz/280nV RMS to 3.5kHz/25µV RMS (4kHz with external oscillator) |
| Output Rate | Up to 7kHz (8kHz with external oscillator) in 2X speed mode |
| Latency | No latency between conversion results in 1X speed mode; one cycle latency in 2X speed mode |
| Input Range | Common mode input range from ground to VCC, independent of VREF |
| Package | 38-Lead QFN (5mm x 7mm w/ EP) |
| Interface | 4-wire serial interface |
Key Features
- Proprietary delta-sigma architecture for variable speed and resolution settings.
- No latency between conversion results in 1X speed mode, ensuring continuous scanning of all channels without settling time.
- Internal reset after each conversion to eliminate memory effects and ensure stability of the high-order delta-sigma modulator.
- Support for any combination of single-ended or differential inputs.
- High accuracy and stability with no shift in DC accuracy (offset, full-scale, linearity, drift) across different speed and resolution settings.
Applications
The LTC2445IUHF#PBF is suitable for a variety of high-precision data acquisition applications, including industrial automation, medical devices, scientific instruments, and any system requiring high-resolution and high-speed analog-to-digital conversion.
Q & A
- What is the resolution of the LTC2445IUHF#PBF ADC?
The LTC2445IUHF#PBF has a 24-bit resolution. - How many channels does the LTC2445IUHF#PBF support?
The device supports 8- or 16-channel (4- or 8-differential) configurations. - What are the speed/resolution combinations available for the LTC2445IUHF#PBF?
The device offers 10 speed/resolution combinations ranging from 6.9Hz/280nV RMS to 3.5kHz/25µV RMS (4kHz with an external oscillator). - Does the LTC2445IUHF#PBF have any latency between conversion results?
In the 1X speed mode, there is no latency between conversion results. In the 2X speed mode, there is one cycle latency. - What is the common mode input range of the LTC2445IUHF#PBF?
The common mode input range is from ground to VCC, independent of VREF. - What package type is the LTC2445IUHF#PBF available in?
The device is available in a 38-Lead QFN (5mm x 7mm w/ EP) package. - How does the LTC2445IUHF#PBF interface with other components?
The device uses a 4-wire serial interface. - What are some typical applications for the LTC2445IUHF#PBF?
Typical applications include industrial automation, medical devices, scientific instruments, and other high-precision data acquisition systems. - Does the LTC2445IUHF#PBF require any settling time between conversions?
No, the device does not require any settling time between conversions, allowing continuous scanning of all channels. - How does the LTC2445IUHF#PBF ensure stability and accuracy?
The device internally resets after each conversion, eliminating any memory effects and ensuring stability of the high-order delta-sigma modulator.
