Overview
The LTC2372-18, produced by Analog Devices Inc., is a high-performance, 18-bit successive approximation register (SAR) analog-to-digital converter (ADC). This component is designed for low noise and high speed applications, operating from a single 5V supply. It features an 8-channel input multiplexer with highly configurable and low crosstalk capabilities, supporting fully differential, pseudo-differential unipolar, and pseudo-differential bipolar analog input ranges. The ADC achieves high accuracy with ±2.75LSB INL (maximum) and no missing codes at 18 bits, along with a signal-to-noise ratio (SNR) of 100dB (fully differential) and 95dB (pseudo-differential).
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 18 bits |
| Sample Rate | 500 ksps |
| Number of Channels | 8 |
| Input Range | Fully differential, pseudo-differential unipolar, pseudo-differential bipolar |
| INL (Maximum) | ±2.75 LSB |
| SNR (Typical) | 100 dB (fully differential), 95 dB (pseudo-differential) |
| Supply Voltage | 5V |
| Power Consumption | 27 mW (active), 300 μW (sleep mode) |
| Package | 32-Lead QFN (5x5) |
| Interface | SPI-compatible serial interface (1.8V, 2.5V, 3.3V, 5V logic) |
| Reference | Onboard 2.048V temperature-compensated reference |
Key Features
- Highly configurable 8-channel input multiplexer with low crosstalk.
- Supports fully differential, pseudo-differential unipolar, and pseudo-differential bipolar analog input ranges.
- Onboard low drift (20 ppm/°C max) 2.048V temperature-compensated reference and a single-shot capable reference buffer.
- High speed SPI-compatible serial interface supporting 1.8V, 2.5V, 3.3V, and 5V logic.
- Internal oscillator for setting the conversion time, reducing external timing considerations.
- Low power consumption: 27 mW active, 300 μW in sleep mode, with automatic nap between conversions.
- Programmable sequencer with a depth of 16.
Applications
The LTC2372-18 is suitable for a variety of high-performance applications requiring precise and fast analog-to-digital conversion. These include:
- Industrial automation and control systems.
- Medical devices and diagnostic equipment.
- Aerospace and defense systems.
- High-speed data acquisition systems.
- Test and measurement instruments.
Q & A
- What is the resolution of the LTC2372-18 ADC?
The LTC2372-18 has a resolution of 18 bits.
- What is the sample rate of the LTC2372-18?
The sample rate of the LTC2372-18 is 500 ksps.
- How many input channels does the LTC2372-18 have?
The LTC2372-18 has 8 input channels.
- What types of input ranges are supported by 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 of the LTC2372-18 is 100 dB (fully differential) and 95 dB (pseudo-differential).
- 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 use?
The LTC2372-18 uses a SPI-compatible serial interface supporting 1.8V, 2.5V, 3.3V, and 5V logic.
- Does the LTC2372-18 have an onboard reference?
Yes, the LTC2372-18 has an onboard 2.048V temperature-compensated reference.
- How does the LTC2372-18 manage power consumption during inactive periods?
The LTC2372-18 automatically naps between conversions and has a sleep mode to reduce power consumption to 300 μW.
- What is the package type of the LTC2372-18?
The LTC2372-18 is packaged in a 32-Lead QFN (5x5).
