Overview
The AD7304BRU-REEL7 is a quad, 8-bit digital-to-analog converter (DAC) produced by Analog Devices Inc. This component operates from a single +3 V to +5 V supply or ±5 V supplies, making it versatile for various applications. The AD7304 features a serial interface and is known for its high-speed, 3-wire, SPI- and microcontroller-compatible inputs. The device includes internal precision buffers that swing rail-to-rail, allowing for full-scale output voltages determined by the external reference input voltage.
Key Specifications
| Parameter | Condition | Value | Unit |
|---|---|---|---|
| Resolution | - | 8 bits | - |
| Supply Voltage Range | - | 2.7 V to 5.5 V or ±5 V | V |
| Reference Input Range | - | VSS to VDD | V |
| Output Voltage Range | - | VSS to VDD | V |
| Output Current Drive | Code = 0x80, ΔVOUT < 1 LSB | ±3 mA | mA |
| Shutdown Resistance | DAC outputs in shutdown state | 120 kΩ | kΩ |
| Capacitive Load | No oscillation | 200 pF | pF |
| Logic Input Low Voltage | VDD = 3 V or 5 V | 0.6 V or 0.8 V | V |
| Logic Input High Voltage | VDD = 3 V or 5 V | 2.1 V or 2.4 V | V |
| Clock Frequency | - | Up to 16.6 MHz | MHz |
| Power Dissipation | No load, VLOGIC = 0 V or VDD | 15 mW to 60 mW | mW |
| Shutdown Supply Current | No load, SDI/SHDN = floating | 40 µA | µA |
Key Features
- Double-Buffered Architecture: Allows all four input registers to be preloaded with new values, followed by an LDAC control strobe that updates the analog output values.
- Serial Interface: High-speed, 3-wire, SPI- and microcontroller-compatible inputs using data in (SDI), clock (CLK), and chip select (CS) pins.
- Rail-to-Rail Output: Internal precision buffers swing rail-to-rail, enabling full-scale output voltages determined by the external reference input voltage.
- Power-On Reset: Sets the output to zero scale upon power-up.
- Low Power Consumption: Consumes less than 9 mW from a 3 V supply and has a shutdown mode with a supply current of 40 µA.
- Wide Operating Range: Guaranteed operation over the supply voltage range of 2.7 V to 5.5 V.
Applications
- Automotive Systems: Suitable for applications requiring output span voltage control.
- Instrumentation: Used in digitally controlled calibration and measurement systems.
- Industrial Control Systems: Ideal for applications needing precise analog output control.
- Medical Devices: Can be used in medical equipment requiring accurate and reliable DAC functionality.
Q & A
- What is the resolution of the AD7304BRU-REEL7 DAC?
The AD7304BRU-REEL7 has an 8-bit resolution.
- What is the supply voltage range for the AD7304BRU-REEL7?
The supply voltage range is from 2.7 V to 5.5 V or ±5 V.
- What is the reference input range for the AD7304BRU-REEL7?
The reference input range includes both supply rails, from VSS to VDD.
- How does the double-buffered architecture of the AD7304BRU-REEL7 work?
The double-buffered architecture allows all four input registers to be preloaded with new values, followed by an LDAC control strobe that updates the analog output values.
- What is the maximum clock frequency for the AD7304BRU-REEL7?
The maximum clock frequency is up to 16.6 MHz.
- What is the power consumption of the AD7304BRU-REEL7 in shutdown mode?
The shutdown supply current is 40 µA.
- Can the AD7304BRU-REEL7 operate with a single supply or dual supplies?
The AD7304BRU-REEL7 can operate from a single +3 V to +5 V supply or ±5 V supplies.
- What is the output current drive capability of the AD7304BRU-REEL7?
The output current drive is ±3 mA at code 0x80 with ΔVOUT < 1 LSB.
- What are some common applications of the AD7304BRU-REEL7?
Common applications include automotive systems, instrumentation, industrial control systems, and medical devices.
- Does the AD7304BRU-REEL7 have a power-on reset feature?
