Overview
The LTC2487IDE#PBF is a 16-bit, 2-/4-channel Delta-Sigma (ΔΣ) analog-to-digital converter (ADC) produced by Analog Devices Inc. This device features Easy Drive technology, a 2-wire I2C interface, and a patented sampling scheme that eliminates dynamic input current errors and the shortcomings of on-chip buffering. It is designed to directly digitize high impedance sensors and rail-to-rail input signals with exceptional DC accuracy.
The LTC2487IDE#PBF includes programmable gain from 1 to 256 in 8 steps, a high accuracy temperature sensor with 1/2°C resolution and 2°C absolute accuracy, and an integrated oscillator. It supports both single-ended and differential input modes and allows any combination of the 4 analog input channels to be selected.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 16-bit | |
| Number of Channels | 2 differential / 4 single-ended | |
| Programmable Gain | 1 to 256 in 8 steps | |
| Input Range | 0V to VCC | V |
| Temperature Sensor Resolution | 1/2°C | °C |
| Temperature Sensor Absolute Accuracy | 2°C | °C |
| Noise | 600nV RMS | nV |
| Interface | 2-wire I2C | |
| Operating Temperature Range | -40°C to 85°C (Industrial Grade) | °C |
| Package | 14-Lead DFN (4mm x 3mm w/ EP) |
Key Features
- Easy Drive technology enables rail-to-rail inputs with zero differential input current.
- Directly digitizes high impedance sensors with full accuracy.
- 2-wire I2C interface with 9 addresses plus one global address for synchronization.
- Programmable gain from 1 to 256 in 8 steps.
- Integrated high accuracy temperature sensor with 1/2°C resolution and 2°C absolute accuracy.
- Wide common mode input range (0V to VCC), independent of the reference voltage.
- Auto calibration continuously removes offset and drift associated with external amplifiers.
- No latency ΔΣ ADC architecture.
Applications
- Industrial automation and control systems.
- Medical devices requiring high accuracy and low noise.
- Environmental monitoring and sensor systems.
- Aerospace and defense applications where precision and reliability are critical.
- Automotive systems, particularly those requiring accurate sensor data.
Q & A
- What is the resolution of the LTC2487IDE#PBF ADC?
The LTC2487IDE#PBF has a 16-bit resolution.
- How many channels does the LTC2487IDE#PBF support?
The device supports up to 2 differential or 4 single-ended input channels.
- What is the programmable gain range of the LTC2487IDE#PBF?
The programmable gain ranges from 1 to 256 in 8 steps.
- What is the input range of the LTC2487IDE#PBF?
The input range is from 0V to VCC.
- Does the LTC2487IDE#PBF have an integrated temperature sensor?
Yes, it includes a high accuracy temperature sensor with 1/2°C resolution and 2°C absolute accuracy.
- What interface does the LTC2487IDE#PBF use?
The device uses a 2-wire I2C interface.
- What is the operating temperature range of the LTC2487IDE#PBF?
The operating temperature range is -40°C to 85°C for the industrial grade version.
- What package type is the LTC2487IDE#PBF available in?
The device is available in a 14-Lead DFN (4mm x 3mm w/ EP) package.
- Does the LTC2487IDE#PBF support auto calibration?
Yes, it supports auto calibration to remove offset and drift associated with external amplifiers.
- What is the noise level of the LTC2487IDE#PBF?
The noise level is 600nV RMS.
