Overview
The LTC2389CLX-18 is a high-performance 18-bit successive approximation register (SAR) Analog-to-Digital Converter (ADC) designed by Analog Devices Inc. This device operates from a single 5V supply and is renowned for its low noise and high-speed capabilities. It supports pin-configurable fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V) analog input ranges, making it versatile for various signal chain formats without the need for additional level translation or signal conditioning.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 18 bits | |
| Sampling Rate | 2.5 Msps | |
| Supply Voltage (VDD, OVDD) | 5 V | |
| Analog Input Voltage Range | ±4.096V (fully differential), 0V to 4.096V (pseudo-differential unipolar), ±2.048V (pseudo-differential bipolar) | |
| Signal-to-Noise Ratio (SNR) | 99.8 dB (fully differential), 95.2 dB (pseudo differential) | |
| Integral Nonlinearity (INL) | ±3 LSB (maximum) | |
| Reference Voltage | 4.096 V (internal) | |
| Reference Accuracy | 0.5% initial accuracy, ±20 ppm/°C temperature coefficient | |
| Power Consumption | 162.5 mW at 2.5 Msps | |
| Operating Temperature Range | 0°C to 70°C | |
| Package Type | 48-pin LQFP (7x7 mm) | |
| Data Interface | SPI, Parallel |
Key Features
- 18-bit resolution with no missing codes
- Single input with pseudo-differential or differential signal processing capabilities
- Selectable address modes
- Data interface options: SPI and parallel
- Sampling rate up to 2.5 Msps
- Internal oscillator for conversion timing
- Low power consumption with nap and sleep power-down modes
- Precision internal 4.096V reference with a guaranteed 0.5% initial accuracy and ±20 ppm/°C temperature coefficient
Applications
- Data acquisition systems
- Medical devices
- Industrial control systems
- High-speed, wide dynamic range data acquisition
- Instrumentation
- Automated Test Equipment (ATE)
Q & A
- What is the resolution of the LTC2389CLX-18 ADC?
The LTC2389CLX-18 has an 18-bit resolution.
- What are the supported analog input ranges for the LTC2389CLX-18?
The device supports fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V) analog input ranges.
- What is the sampling rate of the LTC2389CLX-18?
The sampling rate is up to 2.5 Msps.
- What are the power consumption and power-down modes of the LTC2389CLX-18?
The device consumes 162.5 mW at 2.5 Msps and features nap and sleep power-down modes to reduce power consumption during inactive periods.
- What types of data interfaces does the LTC2389CLX-18 support?
The device supports both SPI and parallel data interfaces.
- What is the operating temperature range of the LTC2389CLX-18?
The operating temperature range is from 0°C to 70°C.
- Does the LTC2389CLX-18 have an internal reference voltage?
Yes, it includes a precision internal 4.096V reference with a guaranteed 0.5% initial accuracy and ±20 ppm/°C temperature coefficient.
- What are some typical applications of the LTC2389CLX-18?
Typical applications include data acquisition systems, medical devices, industrial control systems, high-speed data acquisition, instrumentation, and Automated Test Equipment (ATE).
- What package types are available for the LTC2389CLX-18?
The device is available in a 48-pin LQFP (7x7 mm) package.
- Does the LTC2389CLX-18 have any specific power-saving features?
Yes, it features nap and sleep power-down modes to reduce power consumption during inactive periods.
