Overview
The LTC2357ILX-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 series and is known for its flexibility and wide dynamic range, making it ideal for various high-voltage applications. The ADC operates from a 5V low voltage supply and can be configured to accept different signal ranges, including ±10.24V, 0V to 10.24V, ±5.12V, and 0V to 5.12V, on a conversion-by-conversion basis. 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
| Parameter | Value |
|---|---|
| Resolution | 18 bits |
| Sampling Rate | 350 ksps per channel |
| Input Range | ±10.24V, 0V to 10.24V, ±5.12V, 0V to 5.12V |
| Input Leakage | 500 pA / 12 nA (at 85°C / 125°C) |
| Integral Non-Linearity (INL) | ±3.5 LSB (maximum, ±10.24V range) |
| Signal-to-Noise Ratio (SNR) | 96.4 dB |
| Common Mode Rejection Ratio (CMRR) | 128 dB |
| Supply Voltage (VCC) | -0.3V to (VEE + 40V) |
| Supply Voltage (VEE) | -17.4V to 0.3V |
| Supply Voltage Difference (VCC – VEE) | 40V |
| Package | 48-Lead (7mm × 7mm) LQFP |
| Serial Interface | SPI CMOS (1.8V to 5V), LVDS |
Key Features
- Buffered differential inputs with wide common mode range and picoamp-input analog buffers.
- Flexible high voltage supplies and internal reference and buffer.
- Individual channel configuration and disable capability for increased throughput.
- High SNR and low INL for accurate signal conversion.
- Pin-selectable SPI CMOS and LVDS serial interfaces.
- Support for one to four lanes of data output in CMOS mode.
Applications
- Simultaneous sampling of 4 buffered channels.
- High-voltage applications requiring wide dynamic range.
- Industrial, medical, and communications equipment.
- Entertainment and audio/video systems.
- Any application needing precise and flexible analog-to-digital conversion.
Q & A
- What is the resolution of the LTC2357ILX-18#PBF ADC?
The LTC2357ILX-18#PBF has an 18-bit resolution. - What is the sampling rate of this ADC?
The sampling rate is 350 ksps per channel. - What are the input voltage ranges supported by this ADC?
The ADC supports input ranges of ±10.24V, 0V to 10.24V, ±5.12V, and 0V to 5.12V. - What is the maximum input leakage current at 85°C and 125°C?
The maximum input leakage current is 500 pA at 85°C and 12 nA at 125°C. - What is the Integral Non-Linearity (INL) of this ADC?
The INL is ±3.5 LSB (maximum, ±10.24V range). - What is the Signal-to-Noise Ratio (SNR) of this ADC?
The SNR is 96.4 dB. - Can individual channels be disabled to increase throughput?
Yes, individual channels can be disabled to increase throughput on the remaining channels. - What types of serial interfaces are supported by this ADC?
The ADC supports SPI CMOS (1.8V to 5V) and LVDS serial interfaces. - What is the package type of the LTC2357ILX-18#PBF?
The package type is a 48-Lead (7mm × 7mm) LQFP. - What are some common applications for this ADC?
Common applications include simultaneous sampling, high-voltage applications, industrial, medical, and communications equipment, and entertainment systems.
