Overview
The LTC2372-18, produced by Analog Devices Inc., is a high-performance, low noise, and high-speed 18-bit successive approximation register (SAR) analog-to-digital converter (ADC). This 8-channel ADC operates from a single 5V supply and features a highly configurable, low crosstalk 8-channel input multiplexer. It supports fully differential, pseudo-differential unipolar, and pseudo-differential bipolar analog input ranges, making it versatile for various applications. The LTC2372-18 is known for its excellent linearity, achieving ±2.75LSB INL (maximum) and no missing codes at 18 bits, along with a high signal-to-noise ratio (SNR) of 100dB (fully differential) and 95dB (pseudo-differential).
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 18 bits | |
| Number of Channels | 8 | |
| Sampling Rate | 500 ksps | |
| Supply Voltage | 5V | V |
| Input Range | Fully differential, pseudo-differential unipolar and bipolar | |
| INL (Maximum) | ±2.75LSB | |
| SNR (Typical) | 100dB (fully differential), 95dB (pseudo-differential) | dB |
| Internal Reference Voltage | 2.048V | V |
| Reference Temperature Coefficient | 20 ppm/°C (max) | ppm/°C |
| Power Dissipation | 27 mW (active), 300 μW (sleep mode) | mW/μW |
| Operating Temperature Range | -40°C to 125°C (H grade) | °C |
| Package | 32-WFQFN Exposed Pad |
Key Features
- High-Speed Conversion: The LTC2372-18 operates at a sampling rate of 500 ksps, making it suitable for high-speed applications.
- Low Noise and High Linearity: Achieves ±2.75LSB INL (maximum) and no missing codes at 18 bits, with an SNR of 100dB (fully differential) and 95dB (pseudo-differential).
- Configurable Input Multiplexer: Supports fully differential, pseudo-differential unipolar, and pseudo-differential bipolar analog input ranges.
- Onboard Reference and Buffer: Features an onboard low drift (20 ppm/°C max) 2.048V temperature-compensated reference and a single-shot capable reference buffer.
- Low Power Consumption: Dissipates only 27 mW during active operation and reduces to 300 μW in sleep mode.
- High-Speed SPI Interface: Supports SPI-compatible serial interface with logic levels of 1.8V, 2.5V, 3.3V, and 5V.
Applications
The LTC2372-18 is ideal for various high-performance applications requiring precise and fast analog-to-digital conversion. Some of the key application areas include:
- Industrial Automation: For precise measurement and control in industrial environments.
- Medical Devices: In medical imaging, patient monitoring, and other medical equipment requiring high accuracy.
- Aerospace and Defense: For applications needing high reliability and precision in harsh environments.
- Test and Measurement Equipment: In oscilloscopes, multimeters, and other test equipment requiring high-speed and high-resolution ADCs.
- Automotive Systems: For advanced driver-assistance systems (ADAS) and other automotive applications requiring high-speed data acquisition.
Q & A
- What is the resolution of the LTC2372-18 ADC?
The LTC2372-18 has a resolution of 18 bits.
- How many channels does the LTC2372-18 support?
The LTC2372-18 supports 8 channels.
- What is the maximum sampling rate of the LTC2372-18?
The maximum sampling rate is 500 ksps.
- What are the supported input ranges for the LTC2372-18?
The LTC2372-18 supports fully differential, pseudo-differential unipolar, and pseudo-differential bipolar analog input ranges.
- What is the typical SNR of the LTC2372-18?
The typical SNR is 100dB (fully differential) and 95dB (pseudo-differential).
- Does the LTC2372-18 have an onboard reference?
Yes, it features an onboard low drift (20 ppm/°C max) 2.048V temperature-compensated reference.
- What is the power consumption of the LTC2372-18 in active and sleep modes?
The power consumption is 27 mW in active mode and 300 μW in sleep mode.
- What type of interface does the LTC2372-18 support?
The LTC2372-18 supports a high-speed SPI-compatible serial interface.
- What are the operating temperature ranges for the LTC2372-18?
The operating temperature range is -40°C to 125°C for the H grade.
- What is the package type of the LTC2372-18?
The package type is 32-WFQFN Exposed Pad.
