Overview
The AD7398BR, produced by Analog Devices Inc., is a quad, serial-input 12-bit digital-to-analog converter (DAC). This monolithic DAC is built using the robust CBCMOS process, offering low cost and ease of use in both single and dual-supply systems. It operates from a single 3 V to 5 V supply or a dual ±5 V supply, making it versatile for various applications. The device features a 3-wire, SPI-compatible serial interface and includes internal power-on reset and external asynchronous reset capabilities. The AD7398BR is available in 16-lead, wide body SOIC and ultracompact, thin TSSOP packages, ensuring flexibility in design and implementation.
Key Specifications
| Parameter | Condition | Value | Unit |
|---|---|---|---|
| Resolution | - | 12-bit | - |
| Supply Voltage | Single Supply | 3 V to 5 V | V |
| Supply Voltage | Dual Supply | ±5 V | V |
| Output Slew Rate | Data = 000H to 3FFH to 000H | 2 V/μs | V/μs |
| Settling Time | To ±0.1% of full scale | 6 μs | μs |
| Shutdown Recovery | - | 6 μs | μs |
| DAC Glitch | Q Code 1FFH to 200H to 1FFH | 150 nVs | nVs |
| Digital Feedthrough | VOUT/VREF, VREF = 1.5 VDC + 1 V p-p, f = 100 kHz | -63 dB | dB |
| Shutdown Supply Current | No load | 30/60 μA | μA |
| Positive Supply Current | No load, -40°C < TA < +125°C | 1.5/2.8 mA | mA |
Key Features
- Programmable Power Shutdown: Allows for power shutdown of individual DACs or all DACs, reducing power dissipation on unused channels.
- Double Buffered Registers: Enables simultaneous update of all DAC outputs from previously loaded input registers.
- Internal Power-On Reset and External Asynchronous Reset: Forces output voltage to zero at system turn-on and allows for external reset to zero code state.
- 3-Wire, SPI-Compatible Interface: High-speed serial interface compatible with SPI and microcontrollers using serial data-in (SDI), clock (CLK), and chip-select (CS).
- Four Separate Rail-to-Rail Reference Inputs: Allows for flexible reference voltage configurations.
- Low Temperature Coefficient: 1.5 ppm/°C, ensuring stable performance over temperature variations.
- Compact Packaging: Available in 16-lead, wide body SOIC and ultracompact, thin TSSOP packages.
Applications
- Automotive: Suitable for automotive applications due to its extended industrial temperature range (-40°C to +125°C).
- Portable Communications: Used in portable communication devices where low power consumption and compact design are crucial.
- Digitally Controlled Calibration: Ideal for applications requiring precise digital control over calibration processes.
- PC Peripherals: Can be used in various PC peripherals that require accurate and reliable DAC functionality.
Q & A
- What is the resolution of the AD7398BR DAC?
The AD7398BR has a 12-bit resolution.
- What are the supply voltage options for the AD7398BR?
The AD7398BR can operate from a single 3 V to 5 V supply or a dual ±5 V supply.
- What type of interface does the AD7398BR use?
The AD7398BR uses a 3-wire, SPI-compatible serial interface.
- Does the AD7398BR have power shutdown capabilities?
Yes, the AD7398BR has programmable power shutdown features for individual or all DACs.
- What is the temperature range for the AD7398BR?
The AD7398BR is specified over the extended industrial temperature range of -40°C to +125°C.
- What are the available package options for the AD7398BR?
The AD7398BR is available in 16-lead, wide body SOIC and ultracompact, thin TSSOP packages.
- Does the AD7398BR have internal and external reset capabilities?
Yes, it has an internal power-on reset and an external asynchronous reset.
- What is the settling time of the AD7398BR?
The settling time to ±0.1% of full scale is 6 μs.
- Is the AD7398BR suitable for automotive applications?
Yes, it is qualified for automotive applications.
- What is the typical shutdown recovery time of the AD7398BR?
The typical shutdown recovery time is 6 μs.
