Overview
The LTC2389-16, produced by Analog Devices Inc., is a high-performance, low noise, 16-bit successive approximation register (SAR) analog-to-digital converter (ADC). This device operates from a single 5V supply and is designed to support various analog input ranges, including fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V) configurations. This versatility allows it to interface with multiple signal chain formats without the need for additional level translation or signal conditioning.
The LTC2389-16 is characterized by its high speed, achieving a throughput rate of 2.5 million samples per second (Msps) with no cycle latency in parallel interface modes. It features a precision internal 4.096V reference with a guaranteed 0.5% initial accuracy and a ±20ppm/°C temperature coefficient. The device also includes an internal reference buffer and an internal oscillator to set the conversion time, simplifying external timing considerations.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 16 |
| Sampling Rate | 2.5 Msps |
| Supply Voltage | 5V (Analog and Digital) |
| Analog Input Range | ±4.096V (Fully Differential), 0V to 4.096V (Pseudo-Differential Unipolar), ±2.048V (Pseudo-Differential Bipolar) |
| Signal-to-Noise Ratio (SNR) | 96.0dB (Fully Differential), 93.5dB (Pseudo-Differential) |
| Integral Nonlinearity (INL) | ±1 LSB (Maximum) |
| Reference Type | Internal 4.096V Reference |
| Reference Accuracy | 0.5% Initial Accuracy, ±20ppm/°C Temperature Coefficient |
| Package | 48-Lead QFN (7mm x 7mm x 0.75mm w/ EP) |
| Operating Temperature | 0°C to 70°C |
| Power Consumption | 162.5mW at 2.5Msps |
| Power-Down Modes | Nap and Sleep Modes |
Key Features
- High speed 2.5Msps throughput rate 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).
- Precision internal 4.096V reference with 0.5% initial accuracy and ±20ppm/°C temperature coefficient.
- Internal reference buffer and internal oscillator for setting conversion time.
- Low power consumption: 162.5mW at 2.5Msps, with nap and sleep power-down modes.
- High accuracy: ±1LSB INL (maximum), no missing codes at 16 bits.
- High SNR: 96.0dB (fully differential), 93.5dB (pseudo-differential).
- SPI and parallel data interfaces.
Applications
The LTC2389-16 is ideally suited for a wide variety of high-speed applications, including:
- High-speed data acquisition systems.
- Medical imaging and diagnostic equipment.
- Aerospace and defense systems requiring high precision and speed.
- Industrial automation and control systems.
- Test and measurement equipment.
Q & A
- What is the sampling rate of the LTC2389-16?
The LTC2389-16 has a sampling rate of 2.5 million samples per second (Msps).
- What are the available analog input ranges for the LTC2389-16?
The LTC2389-16 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 LTC2389-16?
The SNR of the LTC2389-16 is 96.0dB for fully differential and 93.5dB for pseudo-differential configurations.
- Does the LTC2389-16 have an internal reference?
Yes, the LTC2389-16 includes a precision internal 4.096V reference with a guaranteed 0.5% initial accuracy and a ±20ppm/°C temperature coefficient.
- What are the power-down modes available for the LTC2389-16?
The LTC2389-16 has both nap and sleep power-down modes to reduce power consumption during inactive periods.
- What is the typical power consumption of the LTC2389-16 at 2.5Msps?
The typical power consumption is 162.5mW at 2.5Msps.
- What are the interface options for the LTC2389-16?
The LTC2389-16 supports both SPI and parallel data interfaces.
- Is the LTC2389-16 RoHS compliant?
Yes, the LTC2389-16 is lead-free and RoHS compliant.
- What is the operating temperature range of the LTC2389-16?
The operating temperature range is from 0°C to 70°C.
- What package options are available for the LTC2389-16?
The LTC2389-16 is available in a 48-Lead QFN (7mm x 7mm x 0.75mm w/ EP) package.
