Overview
The AD7398BRU-REEL7, produced by Analog Devices Inc., is part of the AD7398/AD7399 family of quad, 12-bit/10-bit, voltage output digital-to-analog converters (DACs). These monolithic DACs are built using the robust CBCMOS process, offering low cost and ease of use in both single and dual-supply systems. They operate from a single 3 V to 5 V supply or a dual ±5 V supply, making them versatile for various applications. The AD7398BRU-REEL7 is available in a 16-lead, ultracompact, thin, 1.1 mm TSSOP package, ensuring a compact footprint while maintaining high performance.
Key Specifications
| Parameter | Condition | Value | Unit |
|---|---|---|---|
| Resolution | - | 12-bit (AD7398), 10-bit (AD7399) | - |
| Supply Voltage | VDD | 3 V to 5 V or ±5 V | V |
| Logic Input Low Voltage (VIL) | VDD = 3 V | 0.5 V max | V |
| Logic Input High Voltage (VIH) | CLK only | 80% VDD min | V |
| Input Leakage Current (IIL) | - | 1 μA max | μA |
| Input Capacitance (CIL) | - | 10 pF max | pF |
| Clock Frequency (fCLK) | - | 16.6 MHz max | MHz |
| Clock Width High (tCH) | - | 30 ns min | ns |
| Clock Width Low (tCL) | - | 30 ns min | ns |
| Settling Time (tS) | To ±0.1% of full scale | 6 μs typ | μs |
| Shutdown Recovery (tSDR) | - | 6 μs typ | μs |
| Positive Supply Current (IDD) | No load, −40°C < TA < +125°C | 1.5/2.8 mA typ/max | mA |
| Shutdown Supply Current (IDD_SD) | No load | 30/60 μA typ/max | μA |
Key Features
- Quad DACs: The AD7398BRU-REEL7 features four 12-bit or 10-bit DACs, depending on the model, allowing for multiple analog output channels.
- Serial Interface: A 3-wire, SPI- and microcontroller-compatible serial interface using serial data-in (SDI), clock (CLK), and chip-select (CS) inputs.
- Load DAC Strobe (LDAC): A level-sensitive LDAC input enables simultaneous update of all DAC outputs from previously loaded input registers.
- Power-On Reset and Asynchronous Reset: An internal power-on reset forces the output voltage to zero at system turn-on, and an external asynchronous reset (RS) forces all registers to the zero code state.
- Programmable Power Shutdown: A feature to reduce power dissipation on unused DACs.
- Wide Operating Temperature Range: Specified over the extended industrial temperature range of −40°C to +125°C.
- Compact Packaging: Available in 16-lead, wide body SOIC and ultracompact, thin, 1.1 mm TSSOP packages.
Applications
The AD7398BRU-REEL7 is suitable for a variety of applications requiring multiple analog output channels, including:
- Industrial Control Systems: For controlling and monitoring various industrial processes.
- Medical Devices: In medical equipment that requires precise analog outputs.
- Aerospace and Defense: For applications requiring high reliability and performance over a wide temperature range.
- Automotive Systems: For use in automotive control systems that need multiple analog outputs.
- Consumer Electronics: In devices that require multiple DAC channels for various functions.
Q & A
- What is the resolution of the AD7398BRU-REEL7 DAC?
The AD7398BRU-REEL7 has a resolution of 12 bits for the AD7398 model and 10 bits for the AD7399 model.
- What is the operating voltage range of the AD7398BRU-REEL7?
The AD7398BRU-REEL7 operates from a single 3 V to 5 V supply or a dual ±5 V supply.
- What type of interface does the AD7398BRU-REEL7 use?
The AD7398BRU-REEL7 uses a 3-wire, SPI- and microcontroller-compatible serial interface.
- How does the load DAC strobe (LDAC) function work?
The LDAC input allows for the simultaneous update of all DAC outputs from previously loaded input registers.
- What is the purpose of the power-on reset and asynchronous reset features?
The power-on reset forces the output voltage to zero at system turn-on, and the asynchronous reset (RS) forces all registers to the zero code state.
- Can the power consumption of unused DACs be reduced?
- What is the operating temperature range of the AD7398BRU-REEL7?
The AD7398BRU-REEL7 is specified over the extended industrial temperature range of −40°C to +125°C.
- In what packages is the AD7398BRU-REEL7 available?
The AD7398BRU-REEL7 is available in 16-lead, wide body SOIC and ultracompact, thin, 1.1 mm TSSOP packages.
- What are some typical applications for the AD7398BRU-REEL7?
Typical applications include industrial control systems, medical devices, aerospace and defense, automotive systems, and consumer electronics.
- How does the settling time of the AD7398BRU-REEL7 compare?
The settling time to ±0.1% of full scale is typically 6 μs.
