Overview
The LTC2345IUK-18 is an 18-bit, low noise, 8-channel simultaneous sampling successive approximation register (SAR) analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the LTC2345 family and is known for its high precision and flexibility. It operates from a 5V low voltage supply and features differential inputs with a wide common mode range, making it suitable for a variety of signal digitization tasks.
The ADC includes an internal 2.048V reference and a 2× buffer, which simplify its basic operation. Additionally, an external reference can be used to increase the input range and signal-to-noise ratio (SNR) of the ADC. The SoftSpan™ interface allows for conversion-by-conversion control of the input voltage span on a per-channel basis, enhancing its versatility in different applications.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 18 bits |
| Number of Channels | 8 channels |
| Sampling Rate | 200 ksps |
| Input Type | Differential, wide common mode range |
| Input Voltage Range | ±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V |
| Supply Voltage | 5V |
| Integral Nonlinearity (INL) | ±5 LSB |
| Signal-to-Noise Ratio (SNR) | 91.8 dB |
| Common Mode Rejection Ratio (CMRR) | 102 dB |
| Serial Interface | Pin-selectable SPI CMOS (1.8V to 5V) and LVDS |
| Package | 48-Lead QFN (7mm x 7mm x 0.75mm w/ EP) |
Key Features
- Simultaneous sampling of all 8 channels, ensuring accurate and synchronized data acquisition.
- Flexible SoftSpan™ interface allowing conversion-by-conversion control of the input voltage span on a per-channel basis.
- Internal 2.048V reference and 2× buffer for simplified operation, with the option to use an external reference for increased input range and SNR.
- Wide input common mode range and high CMRR, enabling direct digitization of various signals and simplifying signal chain design.
- No missing codes at 18 bits and low INL, ensuring high accuracy and linearity.
- Pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces, with configurable bus width for optimized throughput.
Applications
The LTC2345IUK-18 is ideal for applications requiring high precision, wide dynamic range, and simultaneous sampling. Some common applications include:
- Industrial process control and monitoring.
- Medical imaging and diagnostics.
- Aerospace and defense systems.
- High-speed data acquisition systems.
- Automotive and automotive safety systems.
Q & A
- What is the resolution of the LTC2345IUK-18 ADC?
The LTC2345IUK-18 has a resolution of 18 bits.
- How many channels does the LTC2345IUK-18 ADC have?
The LTC2345IUK-18 has 8 channels.
- What is the sampling rate of the LTC2345IUK-18 ADC?
The sampling rate is 200 ksps.
- What types of input signals can the LTC2345IUK-18 ADC handle?
The ADC can handle differential inputs with a wide common mode range, and the input voltage range can be configured as ±4.096V, 0V to 4.096V, ±2.048V, or 0V to 2.048V.
- What is the supply voltage for the LTC2345IUK-18 ADC?
The supply voltage is 5V.
- What is the integral nonlinearity (INL) of the LTC2345IUK-18 ADC?
The INL is ±5 LSB.
- What is the signal-to-noise ratio (SNR) of the LTC2345IUK-18 ADC?
The SNR is 91.8 dB.
- What is the common mode rejection ratio (CMRR) of the LTC2345IUK-18 ADC?
The CMRR is 102 dB.
- What serial interfaces are supported by the LTC2345IUK-18 ADC?
The ADC supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces.
- In what package is the LTC2345IUK-18 ADC available?
The ADC is available in a 48-Lead QFN package (7mm x 7mm x 0.75mm w/ EP).
