Overview
The LTC2378-20, produced by Analog Devices Inc., is a low noise, low power, high speed 20-bit successive approximation register (SAR) analog-to-digital converter (ADC). This ADC operates from a single 2.5V supply and supports a large and flexible ±VREF fully differential input range, with VREF ranging from 2.5V to 5.1V. This makes it ideal for high-performance applications requiring a wide dynamic range. The LTC2378-20 achieves high accuracy with ±2ppm INL maximum, no missing codes at 20 bits, and a signal-to-noise ratio (SNR) of 104dB. Its fast 1Msps throughput with no cycle latency and an internal oscillator for conversion timing make it well-suited for various high-speed applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 20 bits |
| Sample Rate | 1 Msps |
| Supply Voltage | 2.5V |
| Input Range | ±VREF (2.5V to 5.1V) |
| INL (Integral Nonlinearity) | ±2ppm maximum |
| SNR (Signal-to-Noise Ratio) | 104dB |
| Power Consumption | 21mW at 1Msps |
| Interface | SPI-compatible serial interface (1.8V, 2.5V, 3.3V, 5V logic) |
| Package | 16-Lead MSOP |
Key Features
- Low noise and low power consumption, making it suitable for power-sensitive applications.
- High speed with 1Msps throughput and no cycle latency.
- Internal oscillator for setting the conversion time, easing external timing considerations.
- Auto power-down feature to reduce power dissipation during inactive periods.
- Digital gain compression (DGC) function to eliminate the need for a negative supply in the driver amplifier while preserving full resolution.
- SPI-compatible serial interface supporting multiple logic levels (1.8V, 2.5V, 3.3V, 5V) and featuring a daisy-chain mode.
- Fully differential analog inputs to maximize signal swing and provide ESD protection.
Applications
- High-performance data acquisition systems.
- Medical imaging and diagnostic equipment.
- Aerospace and defense applications requiring high accuracy and low power consumption.
- Industrial automation and control systems.
- Test and measurement instruments.
- Automotive systems requiring precise analog-to-digital conversion.
Q & A
- What is the resolution of the LTC2378-20 ADC?
The LTC2378-20 has a resolution of 20 bits.
- What is the sample rate of the LTC2378-20?
The sample rate of the LTC2378-20 is 1 Msps.
- What is the supply voltage for the LTC2378-20?
The LTC2378-20 operates from a single 2.5V supply.
- What is the input range of the LTC2378-20?
The input range is ±VREF, with VREF ranging from 2.5V to 5.1V.
- What is the INL (Integral Nonlinearity) of the LTC2378-20?
The INL is ±2ppm maximum.
- What is the SNR (Signal-to-Noise Ratio) of the LTC2378-20?
The SNR is 104dB.
- How much power does the LTC2378-20 consume at 1Msps?
The power consumption is 21mW at 1Msps.
- What type of interface does the LTC2378-20 use?
The LTC2378-20 uses a SPI-compatible serial interface supporting 1.8V, 2.5V, 3.3V, and 5V logic.
- Does the LTC2378-20 have any power-saving features?
Yes, it has an auto power-down feature to reduce power dissipation during inactive periods.
- What is the package type of the LTC2378-20?
The package type is 16-Lead MSOP.
