Overview
The LTC2373-18 is a high-performance, low noise, 18-bit successive approximation register (SAR) analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This ADC operates from a single 5V supply and features an 8-channel input multiplexer with highly configurable and low crosstalk capabilities. It supports fully differential, pseudo-differential unipolar, and pseudo-differential bipolar analog input ranges. The LTC2373-18 is known for its high speed and precision, achieving 1Msps throughput rate and 100dB signal-to-noise ratio (SNR) in fully differential mode and 95dB SNR in pseudo-differential mode.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 18-bit | |
| Throughput Rate | 1 Msps | |
| Number of Channels | 8 | |
| Input Range | Fully Differential (±4.096V), Pseudo-Differential Unipolar (0V to 4.096V), Pseudo-Differential Bipolar (±2.048V) | V |
| SNR (Typical) | 100dB (Fully Differential), 95dB (Pseudo-Differential) | dB |
| INL (Maximum) | ±2.75 LSB | LSB |
| THD (Typical) | -110 dB | dB |
| Supply Voltage | 5V | V |
| Power Dissipation (Typical) | 40 mW | mW |
| Sleep Mode Power Consumption | 300 μW | μW |
| Operating Temperature Range | -40°C to 125°C | °C |
| Package Type | 32-Lead QFN (5mm x 5mm x 0.75mm) |
Key Features
- Highly configurable, low crosstalk 8-channel input multiplexer supporting fully differential, pseudo-differential unipolar, and pseudo-differential bipolar analog input ranges.
- Onboard low drift (20ppm/°C max) 2.048V temperature-compensated reference and a single-shot capable reference buffer.
- High speed SPI-compatible serial interface supporting 1.8V, 2.5V, 3.3V, and 5V logic with a programmable sequencer depth of 16.
- No pipeline delay, no cycle latency, and an internal oscillator for conversion timing.
- Low power consumption with automatic nap mode between conversions and a sleep mode reducing power to 300μW.
Applications
- High Speed Data Acquisition
- Industrial Process Control
- Programmable Logic Controllers
- Automotive Systems: electronic cockpit, battery management systems (BMS), motor/electric drive sensors, active and passive safety solutions, autonomous driving solutions.
Q & A
- What is the resolution of the LTC2373-18 ADC?
The LTC2373-18 has an 18-bit resolution with no missing codes.
- What is the throughput rate of the LTC2373-18?
The throughput rate of the LTC2373-18 is 1 Msps.
- How many channels does the LTC2373-18 support?
The LTC2373-18 supports 8 channels.
- What are the input range options for the LTC2373-18?
The input range options include fully differential (±4.096V), pseudo-differential unipolar (0V to 4.096V), and pseudo-differential bipolar (±2.048V).
- What is the typical SNR of the LTC2373-18?
The typical SNR is 100dB in fully differential mode and 95dB in pseudo-differential mode.
- What is the maximum INL of the LTC2373-18?
The maximum INL is ±2.75 LSB.
- What is the power dissipation of the LTC2373-18 in typical operation?
The typical power dissipation is 40 mW, with a sleep mode power consumption of 300 μW.
- What is the operating temperature range of the LTC2373-18?
The operating temperature range is -40°C to 125°C.
- What type of package does the LTC2373-18 come in?
The LTC2373-18 comes in a 32-Lead QFN (5mm x 5mm x 0.75mm) package.
- Does the LTC2373-18 have any special power-saving features?
Yes, it has an automatic nap mode between conversions and a sleep mode to reduce power consumption.
