Overview
The LTC2372-18, produced by Analog Devices Inc., is a high-performance, low noise, and high-speed analog-to-digital converter (ADC). This 18-bit successive approximation register (SAR) ADC operates from a single 5V supply and features an 8-channel input multiplexer. It supports fully differential, pseudo-differential unipolar, and pseudo-differential bipolar analog input ranges, making it highly versatile for various applications. The LTC2372-18 is known for its excellent linearity, with ±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 |
|---|---|---|
| Number of Bits | 18 | - |
| Sampling Rate | 500 ksps | - |
| Number of Inputs | 8 | - |
| Input Type | Differential, Pseudo-Differential | - |
| Data Interface | SPI | - |
| Supply Voltage (Analog/Digital) | 4.75 V ~ 5.25 V | V |
| Reference Type | Internal | - |
| Reference Voltage | 2.048 V | V |
| Temperature Coefficient (Reference) | 20 ppm/°C (max) | ppm/°C |
| Power Dissipation | 27 mW | mW |
| Operating Temperature Range | 0°C to 70°C (C grade), -40°C to 85°C (I grade), -40°C to 125°C (H grade) | °C |
| Package | 32-WFQFN Exposed Pad | - |
Key Features
- Highly configurable, low crosstalk 8-channel input multiplexer supporting fully differential, pseudo-differential unipolar, and pseudo-differential bipolar analog input ranges.
- Excellent linearity with ±2.75LSB INL (maximum) and no missing codes at 18 bits.
- High signal-to-noise ratio (SNR) of 100dB (fully differential) and 95dB (pseudo-differential).
- Onboard low drift (20ppm/°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 with automatic nap mode between conversions and a sleep mode reducing power to 300μW during inactive periods.
Applications
- Data acquisition systems requiring high precision and speed.
- Industrial control and automation systems.
- Medical devices and diagnostic equipment.
- Aerospace and defense applications.
- Test and measurement instruments.
- High-speed imaging and instrumentation.
Q & A
- What is the resolution of the LTC2372-18 ADC?
The LTC2372-18 is an 18-bit successive approximation register (SAR) ADC.
- What is the sampling rate of the LTC2372-18?
The LTC2372-18 has a sampling rate of 500 ksps.
- How many input channels does the LTC2372-18 have?
The LTC2372-18 features an 8-channel input multiplexer.
- What types of analog 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 signal-to-noise ratio (SNR) of the LTC2372-18?
The SNR is 100dB (fully differential) and 95dB (pseudo-differential).
- What is the power consumption of the LTC2372-18 during active and inactive periods?
The LTC2372-18 dissipates 27 mW during active periods and can reduce power consumption to 300μW in sleep mode.
- What is the operating temperature range of the LTC2372-18?
The operating temperature range is 0°C to 70°C (C grade), -40°C to 85°C (I grade), and -40°C to 125°C (H grade).
- What type of data interface does the LTC2372-18 use?
The LTC2372-18 uses a high speed SPI-compatible serial interface.
- Does the LTC2372-18 have an internal reference?
Yes, the LTC2372-18 has an onboard low drift (20ppm/°C max) 2.048V temperature-compensated reference.
- What is the package type of the LTC2372-18?
The LTC2372-18 is packaged in a 32-WFQFN Exposed Pad.
