Overview
The AD7398BR-REEL, produced by Analog Devices Inc., is a quad, serial-input 12-bit digital-to-analog converter (DAC). This component is part of the AD7398/AD7399 family, which is designed to operate from a single 3 V to 5 V supply or a dual ±5 V supply. Built using the robust CBCMOS process, these monolithic DACs offer low cost and ease of use in various single or dual-supply systems.
The AD7398 is particularly notable for its high-resolution output, making it suitable for applications requiring precise voltage control. The device features a doubled-buffered serial-data interface that is compatible with SPI and microcontrollers, enhancing its versatility in different system designs.
Key Specifications
| Parameter | Symbol | Condition | Value | Unit |
|---|---|---|---|---|
| Resolution | - | - | 12-bit | - |
| Supply Voltage | VDD | Single supply | 3 V to 5 V | V |
| Supply Voltage | VDD | Dual supply | ±5 V | V |
| Logic Input Low Voltage | VIL | VDD = 3 V | 0.5 V max | V |
| Logic Input High Voltage | VIH | VDD = 5 V | 4.0 V min | V |
| Clock Frequency | fCLK | - | 16.6 MHz max | MHz |
| Output Slew Rate | SR | Data = 000H to FFFH to 000H | 2 V/μs typ | V/μs |
| Settling Time | tS | To ±0.1% of full scale | 6 μs typ | μs |
| Shutdown Supply Current | IDD_SD | No load | 30/60 μA typ/max | μA |
| Positive Supply Current | IDD | VIL = 0 V, no load | 1.5/2.8 mA typ/max | mA |
Key Features
- Resolution: 12-bit resolution for precise voltage output.
- Supply Operation: Single supply operation from 3 V to 5 V or dual supply operation from ±5 V.
- Interface: 3-wire, serial SPI-compatible interface with serial data-in (SDI), clock (CLK), and chip-select (CS).
- Buffered Registers: Double-buffered registers for simultaneous update of all DAC outputs.
- Power-On Reset: Internal power-on reset forces the output voltage to zero at system turn-on.
- External Reset: External asynchronous reset (RS) forces all registers to the zero code state.
- Programmable Power Shutdown: Reduces power dissipation on unused DACs.
- Temperature Range: Specified over the extended industrial temperature range of −40°C to +125°C.
- Packages: Available in 16-lead, wide body SOIC and ultracompact, thin, 1.1 mm TSSOP packages.
Applications
The AD7398BR-REEL is suitable for a variety of applications that require precise voltage control and high-resolution digital-to-analog conversion. These include:
- Industrial Control Systems: For controlling and monitoring industrial processes.
- Medical Devices: In medical equipment where precise voltage outputs are critical.
- Aerospace and Defense: For applications requiring high reliability and precision.
- Automotive Systems: In automotive control systems and sensors.
- Test and Measurement Equipment: For generating precise analog signals in test and measurement instruments.
Q & A
- What is the resolution of the AD7398BR-REEL?
The AD7398BR-REEL has a 12-bit resolution.
- What are the supply voltage options for the AD7398BR-REEL?
The device can operate from a single supply of 3 V to 5 V or a dual supply of ±5 V.
- What type of interface does the AD7398BR-REEL use?
The device uses a 3-wire, serial SPI-compatible interface.
- Does the AD7398BR-REEL have internal power-on reset?
Yes, the device has an internal power-on reset that forces the output voltage to zero at system turn-on.
- Can the AD7398BR-REEL be reset externally?
Yes, the device has an external asynchronous reset (RS) that forces all registers to the zero code state.
- What is the temperature range for the AD7398BR-REEL?
The device is specified over the extended industrial temperature range of −40°C to +125°C.
- In what packages is the AD7398BR-REEL available?
The device is available in 16-lead, wide body SOIC and ultracompact, thin, 1.1 mm TSSOP packages.
- What is the clock frequency limit for the AD7398BR-REEL?
The clock frequency limit is 16.6 MHz.
- How long does the settling time typically take for the AD7398BR-REEL?
The settling time to ±0.1% of full scale is typically 6 μs.
- Does the AD7398BR-REEL have a programmable power shutdown feature?
Yes, the device has a programmable power shutdown feature to reduce power dissipation on unused DACs.
