Overview
The LTC2485IDD#TRPBF is a 24-bit Delta-Sigma analog-to-digital converter (ADC) produced by Analog Devices Inc. This component combines high precision with advanced features such as 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 for the direct digitization of input signals with large external source impedances while maintaining exceptional DC accuracy.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 24-bit |
| Conversion Rate | 15 samples per second (sps) |
| Input Type | Differential |
| Input Range | Rail-to-rail (0V to VCC) |
| Reference Voltage | As low as 100mV or tied directly to VCC |
| Interface | I2C |
| Package | 10-Lead DFN (3mm x 3mm w/ EP) |
| Operating Temperature | -40°C to 125°C (Industrial Grade) |
| Line Frequency Rejection | 50Hz, 60Hz, or simultaneous 50Hz/60Hz |
Key Features
- Easy Drive Technology: Eliminates dynamic input current errors and the shortcomings of on-chip buffering, allowing large external source impedances.
- No Latency ΔΣ ADC: Provides high precision with no latency.
- I2C Interface: Configurable through an I2C interface to reject line frequencies and select a 2x speed-up mode.
- On-Chip Oscillator: Eliminates the need for external crystals or oscillators.
- Continuous Calibration: Maintains absolute accuracy and low drift through continuous, transparent offset and full-scale calibration.
Applications
The LTC2485 is suitable for various high-precision measurement applications, including industrial automation, medical devices, and automotive systems. Its ability to handle large external source impedances and reject line frequencies makes it ideal for environments with significant noise and interference.
Q & A
- What is the resolution of the LTC2485?
The LTC2485 has a 24-bit resolution. - What is the conversion rate of the LTC2485?
The conversion rate is 15 samples per second (sps). - What type of input does the LTC2485 support?
The LTC2485 supports differential inputs. - What is the input range of the LTC2485?
The input range is rail-to-rail (0V to VCC). - Can the reference voltage be adjusted?
Yes, the reference voltage can be as low as 100mV or tied directly to VCC. - What interface does the LTC2485 use?
The LTC2485 uses an I2C interface. - What is the package type of the LTC2485IDD#TRPBF?
The package type is a 10-Lead DFN (3mm x 3mm w/ EP). - Does the LTC2485 have built-in line frequency rejection?
Yes, it can reject 50Hz, 60Hz, or simultaneous 50Hz/60Hz line frequencies. - Does the LTC2485 require an external oscillator?
No, it includes an on-chip trimmed oscillator. - How does the LTC2485 maintain accuracy?
The LTC2485 maintains absolute accuracy and low drift through continuous, transparent offset and full-scale calibration.
