Overview
The LTC2338-18, produced by Analog Devices Inc., is a high-performance 18-bit successive approximation register (SAR) analog-to-digital converter (ADC). This device is designed for high-speed and low-noise applications, operating from a single 5V supply. It features fully differential inputs with a true bipolar input range of ±10.24V, making it ideal for applications requiring a wide dynamic range. The LTC2338-18 is characterized by its high signal-to-noise ratio (SNR) of 100dB, low integral nonlinearity (INL) of ±4LSB, and no missing codes at 18 bits. The device also includes an on-board single-shot capable reference buffer and a low drift temperature-compensated reference, enhancing its accuracy and reliability.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 18 bits |
| Sample Rate | 1 Msps |
| Input Range | ±10.24V (true bipolar, fully differential) |
| Signal-to-Noise Ratio (SNR) | 100 dB |
| Integral Nonlinearity (INL) | ±4 LSB max |
| Reference | On-board single-shot capable reference buffer, 2.048V temperature compensated |
| Interface | High speed SPI-compatible serial interface (1.8V, 2.5V, 3.3V, 5V logic) |
| Power Consumption | 50 mW (active), 300 μW (sleep mode) |
| Package | 16-Lead MSOP |
| Operating Temperature | -40°C to 85°C |
Key Features
- Low noise and high speed operation with 1 Msps throughput and no cycle latency.
- True bipolar, fully differential input range of ±10.24V.
- High SNR of 100 dB and low INL of ±4 LSB max with no missing codes at 18 bits.
- On-board single-shot capable reference buffer and low drift temperature-compensated reference.
- High speed SPI-compatible serial interface supporting multiple logic levels (1.8V, 2.5V, 3.3V, 5V).
- Daisy-chain mode for multiple device operation.
- Internal oscillator for setting conversion time, reducing external timing considerations.
- Low power consumption with automatic nap mode between conversions and a sleep mode for further power savings.
Applications
The LTC2338-18 is suited for a variety of high-speed and high-precision applications, including:
- Industrial automation and control systems.
- Medical devices requiring high accuracy and low noise.
- Aerospace and defense systems where reliability and precision are critical.
- Test and measurement equipment.
- High-performance data acquisition systems.
Q & A
- What is the resolution of the LTC2338-18 ADC?
The LTC2338-18 has a resolution of 18 bits.
- What is the sample rate of the LTC2338-18?
The sample rate of the LTC2338-18 is 1 Msps.
- What is the input range of the LTC2338-18?
The input range of the LTC2338-18 is ±10.24V (true bipolar, fully differential).
- What is the signal-to-noise ratio (SNR) of the LTC2338-18?
The SNR of the LTC2338-18 is 100 dB.
- What is the integral nonlinearity (INL) of the LTC2338-18?
The INL of the LTC2338-18 is ±4 LSB max.
- Does the LTC2338-18 have an on-board reference?
Yes, the LTC2338-18 has an on-board single-shot capable reference buffer and a low drift temperature-compensated reference.
- What type of interface does the LTC2338-18 use?
The LTC2338-18 uses a high speed SPI-compatible serial interface supporting 1.8V, 2.5V, 3.3V, and 5V logic.
- How much power does the LTC2338-18 consume?
The LTC2338-18 consumes 50 mW in active mode and 300 μW in sleep mode.
- What is the package type of the LTC2338-18?
The LTC2338-18 is available in a 16-Lead MSOP package.
- What are the typical applications of the LTC2338-18?
The LTC2338-18 is typically used in industrial automation, medical devices, aerospace and defense systems, test and measurement equipment, and high-performance data acquisition systems.
