Overview
The LTC2345IUK-16, produced by Analog Devices Inc., is a 16-bit, low noise, 8-channel simultaneous sampling successive approximation register (SAR) analog-to-digital converter (ADC). This device is part of the LTC2345 series and is known for its high performance and flexibility. It operates from a 5V low voltage supply and features differential, wide common mode range inputs. The ADC's SoftSpan™ interface allows each channel to 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. This flexibility, combined with its high signal-to-noise ratio (SNR) and common mode rejection ratio (CMRR), makes it an ideal choice for applications requiring wide dynamic range.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 16-bit | |
| Number of Channels | 8 | |
| Sampling Rate | 200 ksps | |
| Input Type | Differential | |
| Input Voltage Ranges | ±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V | V |
| Supply Voltage (VDD) | 4.75 to 5.25 | V |
| Supply Current (IVDD) at 200ksps | 15.3 to 17.6 | mA |
| Integral Nonlinearity (INL) | ±1.25 LSB | |
| Signal-to-Noise Ratio (SNR) | 91 dB | |
| Common Mode Rejection Ratio (CMRR) | 102 dB | |
| Operating Temperature Range | –40°C to 85°C (I-Grade) | °C |
| Package Type | 48-Lead QFN (7mm x 7mm x 0.75mm) |
Key Features
- Simultaneous sampling of all 8 channels, ensuring synchronized data acquisition.
- Flexible SoftSpan™ interface allowing per-channel configuration of input voltage ranges on a conversion-by-conversion basis.
- Low noise and high SNR of 91 dB, making it suitable for applications requiring high accuracy and dynamic range.
- High common mode rejection ratio (CMRR) of 102 dB, enabling direct digitization of a variety of signals.
- No missing codes at 16 bits and ±1.25 LSB INL, ensuring high precision and linearity.
- Pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces for flexible data output configurations.
- Ability to disable individual channels to increase throughput on the remaining channels.
Applications
- Industrial automation and control systems requiring precise and synchronized data acquisition.
- Medical devices such as diagnostic equipment and patient monitoring systems.
- Aerospace and defense applications where high accuracy and reliability are critical.
- Test and measurement equipment, including data acquisition systems and oscilloscopes.
- Automotive systems, particularly in advanced driver-assistance systems (ADAS) and autonomous vehicles.
Q & A
- What is the resolution of the LTC2345IUK-16 ADC?
The LTC2345IUK-16 has a resolution of 16 bits.
- How many channels does the LTC2345IUK-16 support?
The LTC2345IUK-16 supports 8 simultaneous sampling channels.
- What are the input voltage ranges supported by the LTC2345IUK-16?
The LTC2345IUK-16 supports input voltage ranges of ±4.096V, 0V to 4.096V, ±2.048V, and 0V to 2.048V.
- What is the sampling rate of the LTC2345IUK-16?
The sampling rate of the LTC2345IUK-16 is 200 ksps per channel.
- What is the typical supply current of the LTC2345IUK-16 at 200ksps sampling rate?
The typical supply current is between 15.3 mA and 17.6 mA.
- What is the signal-to-noise ratio (SNR) of the LTC2345IUK-16?
The SNR of the LTC2345IUK-16 is 91 dB.
- What is the common mode rejection ratio (CMRR) of the LTC2345IUK-16?
The CMRR of the LTC2345IUK-16 is 102 dB.
- What are the supported serial interfaces for the LTC2345IUK-16?
The LTC2345IUK-16 supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces.
- Can individual channels of the LTC2345IUK-16 be disabled?
Yes, individual channels can be disabled to increase throughput on the remaining channels.
- What is the operating temperature range for the I-Grade LTC2345IUK-16?
The operating temperature range for the I-Grade is –40°C to 85°C.
