Overview
The LTC2345HUK-18#PBF 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 series and is known for its high precision and flexibility. It operates from a 5V low voltage supply and features differential, wide common mode range inputs. The ADC can be configured on a conversion-by-conversion basis to accept various input voltage ranges, including ±4.096V, 0V to 4.096V, ±2.048V, and 0V to 2.048V. This flexibility, combined with its high signal-to-noise ratio (SNR) and low integral nonlinearity (INL), makes it an ideal choice for applications requiring wide dynamic range and high accuracy.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 18 bits |
| Number of Channels | 8 channels |
| Sampling Rate | 200 ksps |
| Input Voltage Range | ±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V |
| Supply Voltage | 5V |
| Signal-to-Noise Ratio (SNR) | 91.8 dB |
| Integral Nonlinearity (INL) | ±5 LSB |
| Common Mode Rejection Ratio (CMRR) | 102 dB |
| Package | 48-Lead QFN (7mm x 7mm x 0.75mm) |
| Serial Interface | SPI CMOS (1.8V to 5V), LVDS |
Key Features
- 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.
- Wide input common mode range and high CMRR, enabling direct digitization of various signals.
- No missing codes at 18 bits and low INL for high accuracy.
- Pin-selectable SPI CMOS and LVDS serial interfaces for flexible data output.
- Ability to disable individual channels to increase throughput on remaining channels.
Applications
The LTC2345HUK-18#PBF is suitable for a variety of applications that require high precision, wide dynamic range, and simultaneous sampling. These include:
- Industrial automation and control systems.
- Medical imaging and diagnostic equipment.
- Aerospace and defense systems.
- High-performance data acquisition systems.
- Test and measurement instruments.
Q & A
- What is the resolution of the LTC2345HUK-18#PBF ADC?
The LTC2345HUK-18#PBF has an 18-bit resolution.
- How many channels does the LTC2345HUK-18#PBF support?
The device supports 8 channels.
- What are the input voltage ranges supported by the LTC2345HUK-18#PBF?
The device can accept ±4.096V, 0V to 4.096V, ±2.048V, and 0V to 2.048V input voltage ranges.
- What is the sampling rate of the LTC2345HUK-18#PBF?
The sampling rate is 200 ksps.
- What is the signal-to-noise ratio (SNR) of the LTC2345HUK-18#PBF?
The SNR is 91.8 dB.
- What is the common mode rejection ratio (CMRR) of the LTC2345HUK-18#PBF?
The CMRR is 102 dB.
- What types of serial interfaces does the LTC2345HUK-18#PBF support?
The device supports SPI CMOS (1.8V to 5V) and LVDS serial interfaces.
- Can individual channels of the LTC2345HUK-18#PBF be disabled?
Yes, individual channels can be disabled to increase throughput on the remaining channels.
- What is the package type of the LTC2345HUK-18#PBF?
The device is packaged in a 48-Lead QFN (7mm x 7mm x 0.75mm).
- What are some typical applications of the LTC2345HUK-18#PBF?
Typical applications include industrial automation, medical imaging, aerospace and defense systems, high-performance data acquisition, and test and measurement instruments.
