Overview
The LTC2485IDD#PBF is a 24-bit Delta-Sigma analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This device combines high precision conversion with patented Easy Drive technology and an I2C digital interface. The LTC2485 is designed to eliminate dynamic input current errors and the shortcomings of on-chip buffering, allowing it to directly digitize high impedance sensors with full accuracy. It features an on-chip oscillator and supports a wide common mode input range, making it versatile for various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24-bit |
| Conversion Rate | 15 samples per second (sps) |
| Input Type | Delta-Sigma |
| Interface | I2C |
| Input Range | Rail-to-rail, 0V to VCC |
| Reference Voltage | As low as 100mV or tied directly to VCC |
| Operating Voltage | 2.7V to 5.5V |
| Operating Temperature | -40°C to 85°C (for LTC2485IDD) |
| Package | 10-Lead DFN (3mm x 3mm with EP) |
| Line Frequency Rejection | 50Hz, 60Hz, or simultaneous 50Hz/60Hz |
| Speed Mode | Selectable 2x speed-up mode |
| Integral Non-Linearity (INL) | 2ppm (0.25LSB) |
| Offset Error | 1ppm |
| Full-Scale Error | 15ppm |
Key Features
- Easy Drive Technology: Eliminates dynamic input current errors and the shortcomings of on-chip buffering, allowing direct digitization of high impedance sensors with full accuracy.
- I2C Interface: Enables configuration and communication with the ADC.
- On-Chip Oscillator: Eliminates the need for external crystals or oscillators.
- Wide Common Mode Input Range: 0V to VCC, independent of the reference voltage.
- Line Frequency Rejection: 50Hz, 60Hz, or simultaneous 50Hz/60Hz rejection modes, as well as a 2x speed-up mode.
- No Latency: Digital filter settles in a single cycle).
- High Accuracy: 2ppm INL, 1ppm offset error, and 15ppm full-scale error).
Applications
The LTC2485IDD#PBF is suitable for a variety of applications requiring high precision analog-to-digital conversion, including:
- Industrial Automation: For precise measurement and control in industrial environments.
- Medical Devices: For accurate data acquisition in medical equipment.
- Aerospace and Defense: For high-reliability and precision in aerospace and defense applications.
- Automotive Systems: For robust and accurate measurements in automotive systems.
- Test and Measurement Equipment: For precise data acquisition in various test and measurement applications.
Q & A
- What is the resolution of the LTC2485IDD#PBF ADC?
The LTC2485IDD#PBF has a 24-bit resolution).
- What type of interface does the LTC2485IDD#PBF use?
The LTC2485IDD#PBF uses an I2C digital interface).
- What is the operating voltage range of the LTC2485IDD#PBF?
The operating voltage range is 2.7V to 5.5V).
- What is the temperature range for the LTC2485IDD#PBF?
The operating temperature range is -40°C to 85°C).
- Does the LTC2485IDD#PBF have an on-chip oscillator?
Yes, the LTC2485IDD#PBF includes an on-chip trimmed oscillator).
- What is the line frequency rejection capability of the LTC2485IDD#PBF?
The LTC2485IDD#PBF can reject 50Hz, 60Hz, or simultaneous 50Hz/60Hz line frequencies).
- What is the input range of the LTC2485IDD#PBF?
The input range is rail-to-rail, from 0V to VCC).
- Does the LTC2485IDD#PBF have any latency in its digital filter?
No, the digital filter settles in a single cycle, meaning there is no latency).
- What is the package type of the LTC2485IDD#PBF?
The package type is a 10-Lead DFN (3mm x 3mm with EP)).
- What are the key accuracy specifications of the LTC2485IDD#PBF?
The key accuracy specifications include 2ppm INL, 1ppm offset error, and 15ppm full-scale error).
