Overview
The LTC2493CDE#PBF is a 24-bit, 2-/4-channel delta-sigma analog-to-digital converter (ADC) produced by Analog Devices Inc. This device features Easy Drive technology and a 2-wire I2C interface, making it highly versatile for various precision measurement applications. The LTC2493 is designed to eliminate dynamic input current errors and the shortcomings of on-chip buffering, allowing for the direct digitization of high impedance sensors and rail-to-rail input signals with exceptional DC accuracy.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24-bit |
| Number of Channels | 2 differential or 4 single-ended |
| Conversion Rate | 15 samples per second (sps) |
| Interface | 2-wire I2C |
| Input Current Cancellation | Automatic cancellation of differential input current |
| Common Mode Input Range | 0V to VCC |
| Noise | 600nV RMS |
| Integral Non-Linearity (INL) | 2ppm |
| Offset Error | 1ppm |
| Full-Scale Error | 15ppm |
| Temperature Sensor Resolution | 1/30th°C |
| Temperature Sensor Absolute Accuracy | 2°C |
| Operating Voltage | 2.7V to 5.5V |
| Operating Temperature Range | 0°C to 70°C (LTC2493C), -40°C to 85°C (LTC2493I) |
| Package | 14-Lead DFN (4mm x 3mm with exposed pad) |
Key Features
- Easy Drive Technology: Enables rail-to-rail input signals without latency, eliminating dynamic input current errors and the shortcomings of on-chip buffering.
- No Latency: Digital filter settles in a single cycle, even after a new channel is selected.
- High Accuracy Temperature Sensor: Offers 1/30th°C resolution and 2°C absolute accuracy.
- Integrated Oscillator: Allows for internal clocking and reduced power modes.
- Wide Common Mode Input Range: 0V to VCC, independent of the reference voltage.
- Auto-Calibration: Continuously removes offset and drift associated with external amplifiers.
- Programmable 50Hz, 60Hz or Simultaneous 50Hz/60Hz Rejection Mode: Enhances noise rejection in various power line environments.
- Low Power Operation: Single supply operation from 2.7V to 5.5V with low power consumption (0.8mW at 7.5Hz output rate).
Applications
- Precision Measurement Systems: Ideal for applications requiring high accuracy and low noise, such as industrial automation, medical devices, and scientific instruments.
- Environmental Monitoring: Suitable for measuring temperature, humidity, and other environmental parameters with high precision.
- Automotive Systems: Can be used in automotive sensors and control systems where high accuracy and reliability are crucial.
- Industrial Control Systems: Applicable in various industrial control and automation scenarios, including process control and monitoring.
Q & A
- What is the resolution of the LTC2493CDE#PBF ADC?
The LTC2493CDE#PBF has a 24-bit resolution.
- How many channels does the LTC2493CDE#PBF support?
The device supports up to 2 differential or 4 single-ended channels.
- What is the conversion rate of the LTC2493CDE#PBF?
The conversion rate is 15 samples per second (sps).
- What interface does the LTC2493CDE#PBF use?
The device uses a 2-wire I2C interface.
- What is the common mode input range of the LTC2493CDE#PBF?
The common mode input range is 0V to VCC.
- Does the LTC2493CDE#PBF have an integrated temperature sensor?
Yes, it includes a high accuracy temperature sensor with 1/30th°C resolution and 2°C absolute accuracy.
- What is the operating voltage range of the LTC2493CDE#PBF?
The operating voltage range is from 2.7V to 5.5V.
- What is the package type of the LTC2493CDE#PBF?
The device is packaged in a 14-Lead DFN (4mm x 3mm with exposed pad).
- Does the LTC2493CDE#PBF support power line noise rejection?
Yes, it supports programmable 50Hz, 60Hz, or simultaneous 50Hz/60Hz rejection modes.
- Is the LTC2493CDE#PBF suitable for low power applications?
Yes, it operates with low power consumption (0.8mW at 7.5Hz output rate).
