Overview
The LTC2373CUH-18 is a high-performance, 18-bit successive approximation register (SAR) analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This device is designed for low noise and high-speed applications, operating from a single 5V supply. It features an 8-channel input multiplexer with selectable input ranges, supporting fully differential, pseudo-differential unipolar, and pseudo-differential bipolar analog inputs. The LTC2373CUH-18 is known for its high precision, achieving ±2.75LSB integral nonlinearity (INL) 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 | Description | Value |
|---|---|---|
| Resolution | Number of bits | 18 bits |
| Sampling Rate | Throughput rate | 1 Msps |
| Number of Channels | Input channels | 8 channels |
| Input Range | Analog input range | Fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), pseudo-differential bipolar (±2.048V) |
| SNR | Signal-to-noise ratio | 100dB (fully differential), 95dB (pseudo-differential) |
| INL | Integral nonlinearity | ±2.75LSB (maximum) |
| Reference | Onboard reference voltage | 2.048V temperature-compensated reference |
| Supply Voltage | Analog and digital supply voltage | 5V |
| Operating Temperature | Temperature range | -40°C to 85°C (LTC2373C), -40°C to 125°C (LTC2373H) |
| Package | Package type | 32-WFQFN Exposed Pad |
| Power Dissipation | Typical power consumption | 40mW (typical), 300μW (sleep mode) |
Key Features
- High-Speed Conversion: 1 Msps throughput rate with no pipeline delay or cycle latency.
- High Precision: 18-bit resolution with no missing codes and ±2.75LSB INL (maximum).
- Low Noise: 100dB SNR (fully differential) and 95dB SNR (pseudo-differential) at f = 1kHz.
- Configurable Input Multiplexer: Supports fully differential, pseudo-differential unipolar, and pseudo-differential bipolar analog input ranges.
- Onboard Reference and Buffer: 2.048V temperature-compensated reference and a single-shot capable reference buffer.
- SPI-Compatible Serial Interface: Supports 1.8V, 2.5V, 3.3V, and 5V logic with a programmable sequencer depth of 16.
- Low Power Consumption: 40mW typical power dissipation, with a sleep mode reducing power to 300μW.
Applications
The LTC2373CUH-18 is suitable for a variety of high-precision and high-speed applications, including:
- Industrial Automation: High-accuracy data acquisition in industrial control systems.
- Medical Devices: Precision measurement in medical equipment such as patient monitoring systems.
- Aerospace and Defense: High-reliability data conversion in aerospace and defense applications.
- Test and Measurement: High-speed and high-precision data acquisition in test and measurement instruments.
- Automotive Systems: Advanced driver-assistance systems (ADAS) and other automotive applications requiring high accuracy and speed.
Q & A
- What is the resolution of the LTC2373CUH-18 ADC?
The LTC2373CUH-18 has an 18-bit resolution.
- What is the sampling rate of the LTC2373CUH-18?
The sampling rate is 1 Msps (1 million samples per second).
- How many input channels does the LTC2373CUH-18 have?
The device has 8 input channels.
- What are the supported input ranges for the LTC2373CUH-18?
The device supports fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V) input ranges.
- What is the signal-to-noise ratio (SNR) of the LTC2373CUH-18?
The SNR is 100dB (fully differential) and 95dB (pseudo-differential) at f = 1kHz.
- Does the LTC2373CUH-18 have an onboard reference voltage?
Yes, it has a 2.048V temperature-compensated reference voltage.
- What is the typical power consumption of the LTC2373CUH-18?
The typical power consumption is 40mW, with a sleep mode reducing power to 300μW.
- What is the operating temperature range of the LTC2373CUH-18?
The operating temperature range is -40°C to 85°C (LTC2373C) and -40°C to 125°C (LTC2373H).
- What package type is the LTC2373CUH-18 available in?
The device is available in a 32-WFQFN Exposed Pad package.
- Does the LTC2373CUH-18 support SPI-compatible serial interface?
Yes, it supports 1.8V, 2.5V, 3.3V, and 5V logic with a programmable sequencer depth of 16.
