Overview
The LTC2389-18, produced by Analog Devices Inc., is a high-performance, 18-bit successive approximation register (SAR) analog-to-digital converter (ADC). This device operates from a single 5V supply and is designed for high-speed and low-noise applications. It supports pin-configurable analog input ranges, including fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V), making it versatile for various signal chain formats without the need for additional level translation or signal conditioning.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 18 bits |
| Sampling Rate | 2.5 Msps |
| Analog Input Range | Pin-configurable: ±4.096V (fully differential), 0V to 4.096V (pseudo-differential unipolar), ±2.048V (pseudo-differential bipolar) |
| Supply Voltage | 5V |
| Signal-to-Noise Ratio (SNR) | 99.8 dB (fully differential), 95.2 dB (pseudo differential) |
| Integral Nonlinearity (INL) | ±3 LSB (maximum) |
| Internal Reference | 4.096V with 0.5% initial accuracy and ±20 ppm/°C temperature coefficient |
| Power Consumption | 162.5 mW at 2.5 Msps |
| Package | 48-Lead QFN (7mm x 7mm x 0.75mm w/ EP) |
Key Features
- High-speed operation with 2.5 Msps sampling rate and no cycle latency in parallel interface modes.
- Low noise performance with 99.8 dB SNR in fully differential mode and 95.2 dB SNR in pseudo-differential mode.
- Pin-configurable analog input ranges to support multiple signal chain formats.
- Internal precision 4.096V reference with high accuracy and low temperature coefficient.
- Low power consumption with 162.5 mW at 2.5 Msps and power-down modes (nap and sleep) for reduced power during inactive periods.
- Internal oscillator for setting conversion time, simplifying external timing considerations.
Applications
The LTC2389-18 is ideally suited for a wide variety of high-speed applications, including industrial automation, medical devices, test and measurement equipment, and high-performance data acquisition systems. Its versatility in supporting different analog input ranges and low noise performance make it a reliable choice for demanding environments.
Q & A
- What is the resolution of the LTC2389-18 ADC?
The LTC2389-18 has an 18-bit resolution. - What are the supported analog input ranges for the LTC2389-18?
The LTC2389-18 supports pin-configurable analog input ranges: ±4.096V (fully differential), 0V to 4.096V (pseudo-differential unipolar), and ±2.048V (pseudo-differential bipolar). - What is the sampling rate of the LTC2389-18?
The LTC2389-18 has a sampling rate of 2.5 Msps. - What is the signal-to-noise ratio (SNR) of the LTC2389-18?
The SNR is 99.8 dB in fully differential mode and 95.2 dB in pseudo-differential mode. - Does the LTC2389-18 have an internal reference?
Yes, the LTC2389-18 includes an internal precision 4.096V reference with 0.5% initial accuracy and a ±20 ppm/°C temperature coefficient. - How much power does the LTC2389-18 consume at 2.5 Msps?
The LTC2389-18 consumes 162.5 mW at 2.5 Msps. - What are the power-down modes available for the LTC2389-18?
The LTC2389-18 has nap and sleep power-down modes to reduce power consumption during inactive periods. - What is the package type for the LTC2389CUK-18#PBF?
The LTC2389CUK-18#PBF comes in a 48-Lead QFN (7mm x 7mm x 0.75mm w/ EP) package. - Does the LTC2389-18 have an internal oscillator for setting conversion time?
Yes, the LTC2389-18 includes an internal oscillator for setting the conversion time. - What are some typical applications for the LTC2389-18?
The LTC2389-18 is suitable for industrial automation, medical devices, test and measurement equipment, and high-performance data acquisition systems.
