Overview
The LTC2348HLX-18, produced by Analog Devices Inc., is an 18-bit, low noise, 8-channel simultaneous sampling successive approximation register (SAR) analog-to-digital converter (ADC). This device features differential inputs with a wide common mode range, making it suitable for high voltage applications requiring wide dynamic range. It operates from a 5V low voltage supply and can be configured to accept various input voltage ranges on a per-channel basis, including ±10.24V, 0V to 10.24V, ±5.12V, or 0V to 5.12V. The LTC2348HLX-18 is part of the SoftSpan™ family, offering flexibility and high performance in signal digitization.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 18 |
| Number of Channels | 8 |
| Sampling Rate | 200ksps per channel |
| Input Type | Differential, Pseudo-Differential |
| Input Voltage Range | ±10.24V, 0V to 10.24V, ±5.12V, 0V to 5.12V |
| Supply Voltage (Analog) | 5V |
| Supply Voltage (Digital) | 1.8V to 5V |
| Operating Temperature | -40°C to 125°C |
| Package/Case | 48-Lead LQFP (7mm x 7mm) |
| Data Interface | SPI CMOS (1.8V to 5V), LVDS |
| Integral Non-Linearity (INL) | ±3LSB (Maximum, ±10.24V Range) |
| Signal-to-Noise Ratio (SNR) | 96.7dB |
| Common Mode Rejection Ratio (CMRR) | 118dB |
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 2X buffer for simplified operation
- Option to use an external reference to increase input range and SNR
- No missing codes at 18 bits
- Low noise and high accuracy with ±3LSB INL and 96.7dB SNR
- Pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces
- Ability to optimize bus width and throughput using one to eight lanes of data output in CMOS mode
Applications
- High voltage applications requiring wide dynamic range
- Automotive systems, including electronic cockpit solutions, battery management systems (BMS), motor/electric drive sensors, and active/passive safety solutions
- Industrial automation and control systems
- Medical devices requiring high precision and low noise
- Test and measurement equipment
Q & A
- What is the resolution of the LTC2348HLX-18 ADC?
The LTC2348HLX-18 is an 18-bit ADC.
- How many channels does the LTC2348HLX-18 have?
The LTC2348HLX-18 has 8 channels.
- What is the sampling rate of the LTC2348HLX-18?
The sampling rate is 200ksps per channel.
- What are the input voltage ranges supported by the LTC2348HLX-18?
The device supports input voltage ranges of ±10.24V, 0V to 10.24V, ±5.12V, and 0V to 5.12V.
- What is the common mode rejection ratio (CMRR) of the LTC2348HLX-18?
The CMRR is 118dB.
- Can the LTC2348HLX-18 use an external reference?
- What are the supported data interfaces for the LTC2348HLX-18?
The device supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces.
- What is the operating temperature range of the LTC2348HLX-18?
The operating temperature range is -40°C to 125°C.
- What is the package type of the LTC2348HLX-18?
The package type is 48-Lead LQFP (7mm x 7mm).
- Does the LTC2348HLX-18 have any power-saving modes?
