Overview
The AD7305BRZ is a quad, 8-bit digital-to-analog converter (DAC) produced by Analog Devices Inc. This device operates from a single +3 V to +5 V supply or ±5 V supplies, making it versatile for various applications. The AD7305 features a rail-to-rail reference input to voltage output swing, allowing for full-scale voltage outputs determined by the external reference input voltage applied. It includes a parallel interface and a double-buffered architecture, enabling all four input registers to be preloaded with new values before updating the analog output values with an LDAC control strobe.
Key Specifications
| Parameter | Condition | Value | Unit |
|---|---|---|---|
| Resolution | - | 8 | Bits |
| Integral Nonlinearity (INL) | - | ±1 | LSB max |
| Differential Nonlinearity (DNL) | - | ±1 | LSB max |
| Zero-Scale Error | Data = 0x00 | ±15 | mV max |
| Full-Scale Voltage Error | Data = 0xFF | ±4 | LSB max |
| Full-Scale Temperature Coefficient | - | 5 | ppm/°C typ |
| Reference Input Range | - | VSS to VDD | - |
| Reference Input Resistance | All DACs at code = 0x55 | 7.5 | kΩ typ |
| Reference Input Capacitance | - | 5 | pF typ |
| Output Voltage Range | - | VSS to VDD | - |
| Output Current Drive | Code = 0x80, ∆VOUT < 1 LSB | ±3 | mA typ |
| Operating Temperature Range | - | -40°C to +85°C | - |
| Package | - | 20-SOIC | - |
Key Features
- Quad 8-bit DACs in one package
- Rail-to-rail reference input to voltage output swing
- Operation from single +3 V to +5 V supply or ±5 V supplies
- Parallel interface for data input
- Double-buffered architecture for simultaneous update of all four DACs
- Internal power-on reset sets output to zero scale
- 40 µA power shutdown feature
- Pin-compatible with AD7226 when VDD < 5.5 V
Applications
- Automotive output span voltage
- Instrumentation
- Digitally controlled calibration
- Pin-compatible AD7226 replacement when VDD < 5.5 V
Q & A
- What is the resolution of the AD7305BRZ DAC?
The AD7305BRZ has a resolution of 8 bits.
- What is the operating voltage range for the AD7305BRZ?
The AD7305BRZ operates from a single +3 V to +5 V supply or ±5 V supplies.
- What type of interface does the AD7305BRZ use?
The AD7305BRZ uses a parallel interface for data input.
- What is the significance of the double-buffered architecture in the AD7305BRZ?
The double-buffered architecture allows all four input registers to be preloaded with new values before updating the analog output values with an LDAC control strobe.
- What is the power consumption of the AD7305BRZ from a 3 V supply?
The AD7305BRZ consumes less than 9 mW from a 3 V supply.
- What is the full-scale voltage output determined by in the AD7305BRZ?
The full-scale voltage output is determined by the external reference input voltage applied.
- Does the AD7305BRZ have a power shutdown feature?
Yes, the AD7305BRZ has a 40 µA power shutdown feature.
- Is the AD7305BRZ pin-compatible with any other DACs?
Yes, the AD7305BRZ is pin-compatible with the AD7226 when VDD < 5.5 V.
- What are some typical applications of the AD7305BRZ?
Typical applications include automotive output span voltage, instrumentation, and digitally controlled calibration.
- What is the operating temperature range of the AD7305BRZ?
The operating temperature range is -40°C to +85°C.
