Overview
The LTC2348ILX-18 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 LTC2348 family and is known for its high precision and flexibility. It operates from a 5V low voltage supply and features a SoftSpan™ interface, allowing each channel to be independently configured on a conversion-by-conversion basis to accept various input voltage ranges such as ±10.24V, 0V to 10.24V, ±5.12V, or 0V to 5.12V. The ADC also supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces, enhancing its versatility in different applications.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 18 |
| Number of Channels | 8 |
| Sampling Rate | 200 ksps per channel |
| Input Type | Differential, Pseudo-Differential |
| Input Voltage Range | ±10.24V, 0V to 10.24V, ±5.12V, 0V to 5.12V |
| Data Interface | SPI CMOS (1.8V to 5V), LVDS |
| Reference Type | Internal, External |
| Supply Voltage (Analog/Digital) | 4.75V to 5.25V |
| Package | 48-Lead LQFP (7mm x 7mm) |
| Integral Non-Linearity (INL) | ±3 LSB |
| Signal-to-Noise Ratio (SNR) | 96.7 dB |
| Common Mode Rejection Ratio (CMRR) | 118 dB |
Key Features
- Simultaneous sampling of all 8 channels, ensuring accurate and synchronized data acquisition.
- Flexible SoftSpan™ interface allowing per-channel configuration of input voltage ranges on a conversion-by-conversion basis.
- Low noise operation with high SNR (96.7 dB) and excellent INL (±3 LSB), making it suitable for high precision applications.
- Wide input common mode range and high CMRR (118 dB), enabling direct digitization of a variety of signals without additional signal conditioning.
- Pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces for flexible data output configurations.
- Internal 2.048V reference and 2X buffer for simplified operation, with the option to use an external reference for increased input range and SNR.
- Ability to disable individual channels to increase throughput on the remaining channels.
Applications
The LTC2348ILX-18 is ideal for various high voltage applications requiring wide dynamic range and high precision. Some of the key application areas include:
- Industrial automation and control systems.
- Medical devices, such as diagnostic equipment and patient monitoring systems.
- Aerospace and defense systems, where high accuracy and reliability are critical.
- Automotive systems, including advanced driver-assistance systems (ADAS) and vehicle safety systems.
- Test and measurement equipment, where precise data acquisition is essential.
Q & A
- What is the resolution of the LTC2348ILX-18 ADC?
The LTC2348ILX-18 is an 18-bit ADC.
- How many channels does the LTC2348ILX-18 support?
The LTC2348ILX-18 supports 8 channels.
- What is the sampling rate of the LTC2348ILX-18?
The sampling rate is 200 ksps per channel.
- What are the input voltage ranges supported by the LTC2348ILX-18?
The ADC can accept ±10.24V, 0V to 10.24V, ±5.12V, or 0V to 5.12V signals.
- What data interfaces are supported by the LTC2348ILX-18?
The device supports SPI CMOS (1.8V to 5V) and LVDS serial interfaces.
- What is the package type of the LTC2348ILX-18?
The package type is 48-Lead LQFP (7mm x 7mm).
- What is the typical SNR of the LTC2348ILX-18?
The typical SNR is 96.7 dB.
- Can individual channels of the LTC2348ILX-18 be disabled?
Yes, individual channels can be disabled to increase throughput on the remaining channels.
- What is the common mode rejection ratio (CMRR) of the LTC2348ILX-18?
The CMRR is 118 dB.
- Does the LTC2348ILX-18 have an internal reference and buffer?
Yes, it has an internal 2.048V reference and a 2X buffer.
