Overview
The LTC2345IUK-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 SoftSpan™ family, offering a high degree of flexibility and performance. It operates from a 5V low voltage supply and features differential, wide common mode range inputs. Each channel can be independently configured on a conversion-by-conversion basis to accept various input voltage ranges, including ±4.096V, 0V to 4.096V, ±2.048V, or 0V to 2.048V. The ADC also supports individual channel disablement to increase throughput on the remaining channels.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 18 bits |
| Number of Channels | 8 |
| Sampling Rate | 200 ksps |
| Input Voltage Ranges | ±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V |
| Supply Voltage | 5V |
| Input Common Mode Range | Wide common mode range |
| CMRR (Common Mode Rejection Ratio) | 102 dB |
| INL (Integral Non-Linearity) | ±5 LSB |
| SNR (Signal-to-Noise Ratio) | 91.8 dB |
| Package | 48-Lead QFN (7mm x 7mm x 0.75mm) |
| Serial Interface | Pin-selectable SPI CMOS (1.8V to 5V) and LVDS |
Key Features
- Simultaneous sampling of all 8 channels
- Flexible SoftSpan™ interface allowing conversion-by-conversion control of input voltage span on a per-channel basis
- Internal 2.048V reference and 2× buffer for simplified operation
- Option to use an external reference to increase input range and SNR
- Wide input common mode range and high CMRR (102 dB) for direct digitization of various signals
- No missing codes at 18 bits and low INL (±5 LSB)
- Support for pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces
- Configurable data output lanes in CMOS mode for optimized bus width and throughput
Applications
The LTC2345IUK-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 LTC2345IUK-18#PBF ADC?
The LTC2345IUK-18#PBF has a resolution of 18 bits.
- How many channels does the LTC2345IUK-18#PBF support?
The LTC2345IUK-18#PBF supports 8 channels.
- What are the input voltage ranges supported by the LTC2345IUK-18#PBF?
The input voltage ranges include ±4.096V, 0V to 4.096V, ±2.048V, and 0V to 2.048V.
- What is the sampling rate of the LTC2345IUK-18#PBF?
The sampling rate is 200 ksps.
- What is the supply voltage for the LTC2345IUK-18#PBF?
The supply voltage is 5V.
- What is the common mode rejection ratio (CMRR) of the LTC2345IUK-18#PBF?
The CMRR is 102 dB.
- Does the LTC2345IUK-18#PBF support simultaneous sampling?
- What serial interfaces are supported by the LTC2345IUK-18#PBF?
The LTC2345IUK-18#PBF supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces.
- Can the data output lanes be configured in CMOS mode?
- What is the package type of the LTC2345IUK-18#PBF?
The package type is a 48-Lead QFN (7mm x 7mm x 0.75mm).
