Overview
The LTC2484CDD#PBF is a 24-bit Delta-Sigma (ΔΣ) analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This device is distinguished by its patented Easy Drive technology, which enables the direct digitization of high impedance sensors and input signals with rail-to-rail input range, while maintaining exceptional DC accuracy. The LTC2484 combines a no-latency ADC with automatic cancellation of differential input current, eliminating dynamic input current errors and the shortcomings of on-chip buffering.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 24 bits |
| Number of Channels | 1 Channel |
| Interface Type | SPI |
| Sampling Rate | 15 S/s (selectable 2x speed-up mode) |
| Input Type | Differential |
| Architecture | Sigma-Delta |
| Analog Supply Voltage | 2.7 V to 5.5 V |
| Digital Supply Voltage | 2.7 V to 5.5 V |
| Minimum Operating Temperature | 0°C |
| Maximum Operating Temperature | 70°C |
| Package | 10-Lead DFN (3mm x 3mm w/ EP) |
| Noise | 600 nV RMS |
| Integral Non-Linearity (INL) | 2 ppm |
| Offset Error | 1 ppm |
| Total Unadjusted Error | 15 ppm |
Key Features
- Easy Drive Technology: Enables rail-to-rail inputs and eliminates dynamic input current errors and the shortcomings of on-chip buffering through automatic cancellation of differential input current.
- No Latency: Digital filter settles in a single cycle, ensuring no latency in the conversion process.
- High Accuracy: Features 2 ppm INL, 1 ppm offset, and 15 ppm total unadjusted error.
- Wide Common Mode Input Range: Allows input signals from 0V to VCC independent of the reference voltage.
- Line Frequency Rejection: Can be configured to reject 50Hz, 60Hz, or simultaneous 50Hz/60Hz line frequencies.
- On-Chip Oscillator: Eliminates the need for external crystals or oscillators.
- Single Supply Operation: Operates from a single supply voltage of 2.7V to 5.5V.
Applications
The LTC2484CDD#PBF is suitable for a variety of applications that require high precision and low noise analog-to-digital conversion. These include:
- High Impedance Sensor Interfaces: Directly digitizes signals from high impedance sensors while maintaining full accuracy.
- Industrial Automation: Used in applications requiring precise measurement and control, such as in process control and automation systems.
- Medical Devices: Suitable for medical applications where high accuracy and low noise are critical, such as in patient monitoring and diagnostic equipment.
- Aerospace and Defense: Used in applications requiring high reliability and precision, such as in navigation and control systems.
Q & A
- What is the resolution of the LTC2484CDD#PBF ADC?
The resolution of the LTC2484CDD#PBF is 24 bits.
- What is the sampling rate of the LTC2484CDD#PBF?
The sampling rate is 15 S/s, with a selectable 2x speed-up mode.
- What type of input does the LTC2484CDD#PBF support?
The LTC2484CDD#PBF supports differential inputs.
- What is the operating temperature range of the LTC2484CDD#PBF?
The operating temperature range is from 0°C to 70°C.
- Does the LTC2484CDD#PBF have an on-chip oscillator?
Yes, the LTC2484CDD#PBF includes an on-chip trimmed oscillator, eliminating the need for external crystals or oscillators.
- What is the common mode input range of the LTC2484CDD#PBF?
The common mode input range is from 0V to VCC, independent of the reference voltage.
- Can the LTC2484CDD#PBF reject line frequencies?
Yes, it can be configured to reject 50Hz, 60Hz, or simultaneous 50Hz/60Hz line frequencies.
- What is the noise performance of the LTC2484CDD#PBF?
The noise performance is 600 nV RMS.
- What is the integral non-linearity (INL) of the LTC2484CDD#PBF?
The INL is 2 ppm.
- What is the offset error of the LTC2484CDD#PBF?
The offset error is 1 ppm.
