Overview
The AD7305BRZ-REEL 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 AD7305 features a parallel interface, which allows for efficient data transfer and control. It is part of the AD7304/AD7305 family, with the AD7305 specifically designed for parallel input, making it pin-compatible with the industry-standard AD7226 when operating below +5.5 V.
Key Specifications
| Parameter | Condition | Value | Unit |
|---|---|---|---|
| Resolution | - | 8 | Bits |
| Integral Nonlinearity (INL) | - | ±1 | LSB max |
| Differential Nonlinearity (DNL) | - | ±1 | LSB max |
| Zero-Scale Error (VZSE) | Data = 0x00 | ±15 | mV max |
| Full-Scale Voltage Error (VFSE) | Data = 0xFF | ±4 | LSB max |
| Full-Scale Temperature Coefficient (TCVFS) | - | 5 | ppm/°C typ |
| Reference Input Range (VREFIN) | VSS/VDD | VSS/VDD | V min/max |
| Input Resistance (RREFIN) | All DACs at code = 0x55 | 7.5 | kΩ typ |
| Output Voltage Range (VOUT) | VSS/VDD | VSS/VDD | V min/max |
| Output Current Drive (IOUT) | Code = 0x80, ∆VOUT < 1 LSB | ±3 | mA typ |
| Shutdown Resistance (ROUT) | DAC outputs in shutdown state | 120 | kΩ typ |
| Operating Temperature Range | - | -40°C to +85°C / +125°C | °C |
| Power Consumption (typ) | - | 60 mW | W |
Key Features
- Quad 8-Bit DACs: Four independent DACs in a single package.
- Parallel Interface: Standard address decode along with the WR control line for loading data into the input registers.
- Rail-to-Rail Operation: REF input to voltage output swing allows for full-scale output voltages equal to the positive supply VDD, the negative supply VSS, or any value in between.
- Double-Buffered Architecture: Allows preloading of new values into the input registers, followed by an LDAC control strobe to update the analog output values.
- Internal Power-On Reset: Sets the output to zero scale at turn-on.
- Power Shutdown Feature: Activated by tri-stating the A0/SHDN address pin, consuming only 40 µA in shutdown mode.
- High Accuracy and Linearity: Integral Nonlinearity (INL) and Differential Nonlinearity (DNL) of ±1 LSB max.
Applications
- Industrial Control Systems: Suitable for applications requiring precise analog output control.
- Automotive Systems: Operates over an extended temperature range (-40°C to +125°C), making it suitable for automotive environments.
- Medical Devices: High accuracy and reliability make it appropriate for medical equipment.
- Consumer Electronics: Can be used in various consumer electronic devices requiring digital-to-analog conversion.
Q & A
- What is the resolution of the AD7305 DAC?
The AD7305 has a resolution of 8 bits.
- What is the operating voltage range of the AD7305?
The AD7305 operates from a single +3 V to +5 V supply or ±5 V supplies.
- What type of interface does the AD7305 use?
The AD7305 uses a parallel interface.
- What is the significance of the double-buffered architecture in the AD7305?
The double-buffered architecture allows preloading of new values into the input registers, followed by an LDAC control strobe to update the analog output values.
- How does the power shutdown feature work on the AD7305?
The power shutdown feature is activated by tri-stating the A0/SHDN address pin, consuming only 40 µA in shutdown mode.
- What is the operating temperature range of the AD7305?
The AD7305 operates over a temperature range of -40°C to +85°C / +125°C.
- Is the AD7305 pin-compatible with any other industry-standard DACs?
Yes, the AD7305 is pin-compatible with the AD7226 when operating from less than +5.5 V.
- What is the typical power consumption of the AD7305?
The typical power consumption of the AD7305 is 60 mW.
- Does the AD7305 have an internal power-on reset feature?
Yes, the AD7305 has an internal power-on reset feature that sets the output to zero scale at turn-on.
- What is the reference input range for the AD7305?
The reference input range for the AD7305 includes both supply rails, allowing for positive or negative full-scale output voltages.
