Overview
The LTC2389IUK-18 is a high-performance, 18-bit successive approximation register (SAR) analog-to-digital converter (ADC) produced by Analog Devices Inc. This device operates from a single 5V supply and is designed for high-speed applications with low noise and high accuracy. It supports pin-configurable fully differential, pseudo-differential unipolar, and pseudo-differential bipolar 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 |
|---|---|---|
| Number of Bits | 18 | |
| Sampling Rate | 2.5 Msps | |
| Architecture | SAR | |
| Reference Type | External, Internal | |
| Voltage - Supply, Analog/Digital | 5V | V |
| Input Type | Differential, Pseudo-Differential | |
| Analog Input Range | ±4.096V (fully differential), 0V to 4.096V (pseudo-differential unipolar), ±2.048V (pseudo-differential bipolar) | V |
| Signal-to-Noise Ratio (SNR) | 99.8 dB (fully differential), 95.2 dB (pseudo-differential) | dB |
| Integral Non-Linearity (INL) | ±3 LSB (maximum) | LSB |
| Power Consumption | 162.5 mW at 2.5 Msps | mW |
| Operating Temperature | -40°C to 85°C | °C |
| Package | 48-Lead QFN (7mm x 7mm x 0.75mm w/ EP) |
Key Features
- High-speed 2.5 Msps throughput with no cycle latency in parallel interface modes.
- Pin-configurable fully differential, pseudo-differential unipolar, and pseudo-differential bipolar analog input ranges.
- Precision internal 4.096V reference with 0.5% initial accuracy and ±20 ppm/°C temperature coefficient.
- Internal reference buffer and internal oscillator for setting conversion time.
- Low power consumption with nap and sleep power-down modes.
- Support for SPI and parallel data interfaces.
- Selectable address feature.
Applications
The LTC2389IUK-18 is ideally suited for a wide variety of high-speed applications, including:
- High-speed data acquisition systems.
- Medical imaging and diagnostics.
- Aerospace and defense systems.
- Industrial automation and control systems.
- High-performance test and measurement equipment.
Q & A
- What is the resolution of the LTC2389IUK-18 ADC?
The LTC2389IUK-18 is an 18-bit ADC.
- What is the sampling rate of the LTC2389IUK-18?
The sampling rate is 2.5 Msps.
- What are the supported analog input ranges for the LTC2389IUK-18?
The device supports pin-configurable fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V) analog input ranges.
- What is the signal-to-noise ratio (SNR) of the LTC2389IUK-18?
The SNR is 99.8 dB (fully differential) and 95.2 dB (pseudo-differential).
- What is the power consumption of the LTC2389IUK-18 at 2.5 Msps?
The power consumption is 162.5 mW at 2.5 Msps).
- Does the LTC2389IUK-18 have internal power-down modes?
Yes, it has nap and sleep power-down modes to reduce power consumption during inactive periods).
- What is the operating temperature range of the LTC2389IUK-18?
The operating temperature range is -40°C to 85°C).
- What package types are available for the LTC2389IUK-18?
The device is available in a 48-Lead QFN (7mm x 7mm x 0.75mm w/ EP) package).
- Does the LTC2389IUK-18 support SPI and parallel interfaces?
Yes, it supports both SPI and parallel data interfaces).
- What is the accuracy of the internal reference voltage?
The internal reference voltage has a guaranteed 0.5% initial accuracy and a ±20 ppm/°C temperature coefficient).
