Overview
The LTC2344HUH-18 is a high-performance, 18-bit, quad-channel simultaneous sampling successive approximation register (SAR) analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the SoftSpan™ family, known for its wide input common mode range and flexibility in signal handling. The LTC2344HUH-18 operates from a 5V supply and features internal reference and buffer, allowing each channel to be independently configured to accept various signal ranges such as ±4.096V, 0V to 4.096V, ±2.048V, or 0V to 2.048V on a conversion-by-conversion basis. This ADC is designed for applications requiring high precision, low noise, and wide dynamic range.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Resolution | 18 bits | |
| Number of Channels | 4 | |
| Sample Rate | 400 ksps per channel | |
| Input Voltage Range | ±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V | Per channel, configurable |
| Supply Voltage (VDD) | 5V | |
| Supply Voltage (OVDD) | 5V | |
| Analog Input Voltage | –0.3V to (VDD + 0.3V) | |
| Digital Input Voltage | –0.3V to (OVDD + 0.3V) | |
| Operating Temperature Range | –40°C to 125°C (LTC2344H) | |
| Integral Nonlinearity (INL) | ±4 LSB (maximum, ±4.096V range) | |
| Signal-to-Noise Ratio (SNR) | 95 dB | |
| Common Mode Rejection Ratio (CMRR) | 102 dB | |
| Serial Interface | SPI CMOS (1.8V to 5V), LVDS | |
| Package | 32-WFQFN Exposed Pad |
Key Features
- Quad-channel simultaneous sampling SAR ADC with 18-bit resolution.
- Wide input common mode range and 102 dB CMRR, allowing direct digitization of various signals.
- Flexible input voltage ranges: ±4.096V, 0V to 4.096V, ±2.048V, or 0V to 2.048V per channel.
- Low noise performance with ±4 LSB INL and 95 dB SNR.
- No missing codes at 18 bits.
- Pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces.
- Configurable data output lanes in CMOS mode to optimize bus width and throughput.
- Individual channels can be disabled to increase throughput on remaining channels.
Applications
- Industrial process control and monitoring.
- Medical imaging and diagnostics.
- Aerospace and defense systems requiring high precision and reliability.
- Automotive systems, especially those needing robust and accurate signal conversion.
- Test and measurement equipment where wide dynamic range and low noise are critical.
Q & A
- What is the resolution of the LTC2344HUH-18 ADC?
The LTC2344HUH-18 has an 18-bit resolution.
- How many channels does the LTC2344HUH-18 ADC have?
The LTC2344HUH-18 is a quad-channel ADC.
- What are the input voltage ranges for the LTC2344HUH-18?
The input voltage ranges are ±4.096V, 0V to 4.096V, ±2.048V, or 0V to 2.048V per channel.
- What is the sample rate of the LTC2344HUH-18?
The sample rate is 400 ksps per channel.
- What serial interfaces does the LTC2344HUH-18 support?
The LTC2344HUH-18 supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces.
- Can individual channels of the LTC2344HUH-18 be disabled?
- What is the common mode rejection ratio (CMRR) of the LTC2344HUH-18?
The CMRR is 102 dB.
- What is the signal-to-noise ratio (SNR) of the LTC2344HUH-18?
The SNR is 95 dB.
- What is the operating temperature range of the LTC2344HUH-18?
The operating temperature range is –40°C to 125°C for the LTC2344H version.
- What package type is the LTC2344HUH-18 available in?
The LTC2344HUH-18 is available in a 32-WFQFN Exposed Pad package.
