Overview
The AD7302BN, produced by Analog Devices Inc., is a dual 8-bit voltage output digital-to-analog converter (DAC) designed for a wide range of applications. It operates from a single supply voltage of +2.7 V to +5.5 V, making it ideal for battery-powered and portable devices. The AD7302 features on-chip precision output buffers that allow the DAC outputs to swing rail-to-rail, ensuring high accuracy and reliability. The device is available in 20-pin plastic dual-in-line package (PDIP), 20-lead SOIC, and 20-lead TSSOP packages.
Key Specifications
| Parameter | Value | Conditions/Comments |
|---|---|---|
| Resolution | 8 Bits | |
| Supply Voltage | +2.7 V to +5.5 V | |
| Power Consumption (Normal Mode) | < 10 mW @ 3.3 V | Typically 15 mW @ 5 V |
| Power Consumption (Power-Down Mode) | 3 µW @ 25°C | < 1 µA |
| Settling Time | Typically 1.2 µs | |
| Reference Capability | Internal or External | Derived from VDD or applied at REFIN pin |
| Interface | Parallel microprocessor and DSP-compatible | High speed registers and double buffered interface logic |
| Package Options | 20-pin PDIP, 20-lead SOIC, 20-lead TSSOP |
Key Features
- Low power, single supply operation from +2.7 V to +5.5 V.
- On-chip precision output buffers allowing rail-to-rail output swing.
- Internal or external reference capability.
- High speed parallel interface with double buffered interface logic.
- Power-down function reducing current consumption to less than 1 µA.
- Asynchronous LDAC and CLR inputs for simultaneous update and clear of DAC outputs.
- Available in 20-pin PDIP, 20-lead SOIC, and 20-lead TSSOP packages.
Applications
- Portable battery-powered instruments.
- Digital gain and offset adjustment.
- Programmable voltage and current sources.
- Programmable attenuators.
Q & A
- What is the supply voltage range of the AD7302BN?
The AD7302BN operates from a single supply voltage of +2.7 V to +5.5 V. - What is the resolution of the AD7302BN?
The AD7302BN has a resolution of 8 bits. - What are the package options for the AD7302BN?
The AD7302BN is available in 20-pin PDIP, 20-lead SOIC, and 20-lead TSSOP packages. - How does the power-down mode affect the current consumption of the AD7302BN?
In power-down mode, the current consumption is reduced to less than 1 µA. - What is the settling time of the AD7302BN?
The settling time is typically 1.2 µs. - Can the AD7302BN use an external reference?
Yes, the AD7302BN can use either an internal reference derived from VDD or an external reference applied at the REFIN pin. - What type of interface does the AD7302BN have?
The AD7302BN has a parallel microprocessor and DSP-compatible interface with high speed registers and double buffered interface logic. - How are the DAC outputs updated and cleared in the AD7302BN?
The DAC outputs can be simultaneously updated using the asynchronous LDAC input and cleared using the asynchronous CLR input. - What are some typical applications of the AD7302BN?
Typical applications include portable battery-powered instruments, digital gain and offset adjustment, programmable voltage and current sources, and programmable attenuators. - What is the power consumption of the AD7302BN in normal mode?
The power consumption is typically less than 10 mW at 3.3 V and 15 mW at 5 V.
