Overview
The AD7896AR is a 12-bit, single-channel analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This component is designed for high-performance data acquisition applications, offering a compact and power-efficient solution. The AD7896AR operates from a single 2.7 V to 5.5 V supply and features a successive approximation register (SAR) architecture. It includes a track-and-hold amplifier, ADC, and serial interface logic on a single chip, making it ideal for space-constrained and battery-powered systems.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 12 |
| Sampling Rate | Up to 100 kSPS |
| Number of Inputs | 1 (Single Ended) |
| Data Interface | Serial (SPI compatible) |
| Architecture | Successive Approximation Register (SAR) |
| Reference Type | Supply (VDD) |
| Voltage - Supply, Analog/Digital | 2.7 V to 5.5 V |
| Package | 8-Lead SOIC (0.154", 3.90mm Width) |
| Conversion Time | 8 µs (High Sampling Mode), 14 µs (Auto Sleep Mode) |
| Track-and-Hold Acquisition Time | 1.5 µs |
| Power Consumption | Typical 9 mW |
| Operating Temperature Range | -40°C to +85°C |
Key Features
- High sampling rate of up to 100 kSPS with a conversion time of 8 µs in high sampling mode and 14 µs in auto sleep mode.
- Low power consumption of 9 mW typical, making it suitable for battery-powered applications.
- Automatic power-down mode to reduce power consumption during idle periods.
- Internal reference derived from VDD, eliminating the need for an external reference voltage.
- Compact 8-lead SOIC or PDIP package, offering significant space savings.
- Serial interface with SPI compatibility for easy communication with microcontrollers.
- High accuracy with specifications for linearity, full-scale, and offset errors, as well as dynamic performance parameters like harmonic distortion and signal-to-noise ratio.
Applications
- Battery-powered devices and portable equipment due to its low power consumption.
- Industrial control systems and data acquisition modules requiring high accuracy and fast conversion rates.
- Medical devices, such as patient monitoring systems and diagnostic equipment.
- Aerospace and defense applications where compact, reliable ADCs are essential.
- Automotive systems, including sensor interfaces and control units.
Q & A
- What is the resolution of the AD7896AR ADC?
The AD7896AR has a resolution of 12 bits.
- What is the sampling rate of the AD7896AR?
The AD7896AR can sample at rates up to 100 kSPS.
- What type of package is the AD7896AR available in?
The AD7896AR is available in an 8-lead SOIC or PDIP package.
- Does the AD7896AR require an external reference voltage?
No, the AD7896AR uses an internal reference derived from VDD.
- How much power does the AD7896AR typically consume?
The AD7896AR typically consumes 9 mW of power.
- What is the operating temperature range of the AD7896AR?
The operating temperature range is -40°C to +85°C.
- What is the conversion time of the AD7896AR in high sampling mode?
The conversion time in high sampling mode is 8 µs.
- Does the AD7896AR have an automatic power-down feature?
Yes, the AD7896AR has an automatic power-down mode to reduce power consumption during idle periods.
- What type of data interface does the AD7896AR use?
The AD7896AR uses a serial interface compatible with SPI.
- What is the track-and-hold acquisition time of the AD7896AR?
The track-and-hold acquisition time is 1.5 µs.
