Overview
The LTC2389ILX-18 from 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, 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) configurations, making it versatile for various signal chain formats without the need for additional level translation or signal conditioning.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Part Number | LTC2389ILX-18#PBF |
| Description | 18-Bit SAR ADC |
| Package | 48-LQFP (7x7) |
| Number of Bits | 18 |
| Number of A/D Converters | 1 |
| Sampling Rate | 2.5 Msps |
| Reference Type | External, Internal |
| Input Type | Differential, Pseudo-Differential |
| Voltage - Supply, Analog/Digital | 5V |
| Operating Temperature | -40°C to 85°C |
| Data Interface | SPI, Parallel |
| Power Dissipation | 162.5 mW at 2.5 Msps |
| Integral Nonlinearity (INL) | ±3 LSB (maximum) |
| Signal-to-Noise Ratio (SNR) | 99.8 dB (fully differential), 95.2 dB (pseudo differential) |
Key Features
- High-speed 2.5 Msps throughput with no cycle latency in parallel interface modes.
- Pin-configurable analog input ranges: fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V).
- Low noise and high accuracy with ±3 LSB INL (maximum) and no missing codes at 18 bits.
- Internal precision 4.096V reference with 0.5% initial accuracy and ±20 ppm/°C temperature coefficient.
- Internal oscillator for setting conversion time, easing external timing considerations.
- Low power consumption with nap and sleep power-down modes.
- Selectable address feature.
Applications
- Medical Imaging: Suitable for high-speed data acquisition in medical imaging applications.
- High-Speed, Wide Dynamic Range Data Acquisition: Ideal for applications requiring fast and accurate data conversion.
- Industrial Process Control: Used in industrial automation and process control systems for precise measurement and control.
- Instrumentation: Applied in various instrumentation applications requiring high accuracy and speed.
- Automated Test Equipment (ATE): Utilized in ATE systems for high-speed testing and measurement.
Q & A
- What is the resolution of the LTC2389ILX-18 ADC?
The LTC2389ILX-18 is an 18-bit analog-to-digital converter.
- What are the supported analog input ranges for the LTC2389ILX-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 sampling rate of the LTC2389ILX-18?
The LTC2389ILX-18 has a sampling rate of 2.5 Msps.
- What is the power consumption of the LTC2389ILX-18 at 2.5 Msps?
The device dissipates 162.5 mW at 2.5 Msps.
- Does the LTC2389ILX-18 have internal power-down modes?
- What is the operating temperature range of the LTC2389ILX-18?
The operating temperature range is -40°C to 85°C.
- What are the data interface options for the LTC2389ILX-18?
The device supports both SPI and parallel data interfaces.
- Does the LTC2389ILX-18 have an internal reference?
- What is the signal-to-noise ratio (SNR) of the LTC2389ILX-18?
The SNR is 99.8 dB (fully differential) and 95.2 dB (pseudo differential).
- Is the LTC2389ILX-18 lead-free and RoHS compliant?
