Overview
The LTC2357CLX-18#PBF is a high-performance, 18-bit, low-noise, 4-channel simultaneous sampling successive approximation register (SAR) analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the LTC2357 family and is known for its flexibility and wide input range, making it suitable for various high-voltage applications. The ADC operates from a 5V low voltage supply and can be configured to accept different input signal ranges, including ±10.24V, 0V to 10.24V, ±5.12V, and 0V to 5.12V. The integrated picoamp-input analog buffers and wide input common mode range enhance its capability to directly digitize a variety of signals with minimal board space and power consumption.
Key Specifications
| Specification | Value |
|---|---|
| Number of Bits | 18 |
| Sampling Rate per Channel | 350 ksps |
| Input Signal Ranges | ±10.24V, 0V to 10.24V, ±5.12V, 0V to 5.12V |
| Supply Voltage (VCC) | –0.3V to (VEE + 40V) |
| Supply Voltage (VEE) | –17.4V to 0.3V |
| Supply Voltage Difference (VCC – VEE) | 40V |
| Internal Regulated Supply Bypass (VDDLBYP) | 6V |
| Input Leakage at 85°C/125°C | 500pA/12nA |
| Integral Nonlinearity (INL) | ±3.5LSB (Maximum, ±10.24V Range) |
| Signal-to-Noise Ratio (SNR) | 96.4dB |
| Common Mode Rejection Ratio (CMRR) | 128dB |
| Package Type | 48-Lead (7mm × 7mm) Plastic LQFP |
Key Features
- Buffered differential inputs with wide common mode range and picoamp-input analog buffers.
- Flexible input signal ranges: ±10.24V, 0V to 10.24V, ±5.12V, and 0V to 5.12V.
- Simultaneous sampling of four channels.
- High throughput with 350 ksps per channel.
- Low noise and high accuracy with ±3.5LSB INL and 96.4dB SNR.
- Pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces.
- Ability to disable individual channels to increase throughput on remaining channels.
- Compact 48-Lead (7mm × 7mm) Plastic LQFP package.
Applications
- High-voltage measurement systems.
- Industrial control and automation.
- Medical devices requiring high accuracy and low noise.
- Aerospace and defense applications.
- Test and measurement equipment.
- Automotive systems requiring precise analog-to-digital conversion.
Q & A
- What is the number of bits and sampling rate of the LTC2357CLX-18#PBF?
The LTC2357CLX-18#PBF is an 18-bit ADC with a sampling rate of 350 ksps per channel.
- What are the input signal ranges supported by the LTC2357CLX-18#PBF?
The device supports input signal ranges of ±10.24V, 0V to 10.24V, ±5.12V, and 0V to 5.12V.
- What is the supply voltage range for the LTC2357CLX-18#PBF?
The supply voltage range is –0.3V to (VEE + 40V) for VCC and –17.4V to 0.3V for VEE.
- What is the common mode rejection ratio (CMRR) of the LTC2357CLX-18#PBF?
The CMRR is 128dB.
- Can individual channels of the LTC2357CLX-18#PBF be disabled?
- What serial interfaces are supported by the LTC2357CLX-18#PBF?
The device supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces.
- What is the package type of the LTC2357CLX-18#PBF?
The device is packaged in a 48-Lead (7mm × 7mm) Plastic LQFP.
- What is the signal-to-noise ratio (SNR) of the LTC2357CLX-18#PBF?
The SNR is 96.4dB.
- What are some typical applications of the LTC2357CLX-18#PBF?
Typical applications include high-voltage measurement systems, industrial control, medical devices, aerospace and defense, test and measurement equipment, and automotive systems.
- What is the input leakage current at 85°C and 125°C for the LTC2357CLX-18#PBF?
The input leakage current is 500pA at 85°C and 12nA at 125°C.
