Overview
The AD664BE, produced by Analog Devices Inc., is a monolithic 12-bit quad digital-to-analog converter (DAC) integrated circuit. This device integrates four complete 12-bit, voltage-output DACs on a single chip, offering high density and functionality. Each DAC features a double-buffered input latch structure and a data readback function, enabling precise control and verification of the output voltages. The AD664BE is designed to interface easily with a variety of microprocessors through a single microprocessor-compatible input/output (I/O) port that accommodates 4-bit, 8-bit, or 12-bit parallel words.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 12 | 12 | 12 | Bits |
| Analog Output Voltage Range (UNI Versions) | 0 | VCC - 2.02 | VCC - 2.02 | V |
| Analog Output Voltage Range (BIP Versions) | VEE + 2.02 | VCC - 2.02 | VEE + 2.02 | V |
| Output Current | 5 | 5 | 5 | mA |
| Load Resistance | 2 | 2 | 2 | kΩ |
| Load Capacitance | 500 | 500 | 500 | pF |
| Short-Circuit Current | 25 | 40 | 40 | mA |
| Gain Error (UNI) | -7 | ±3 | 7 | LSB |
| Offset Error (UNI) | -2 | ±1/2 | 2 | LSB |
| Zero Error (BIP) | -3 | ±3/4 | 3 | LSB |
| Linearity Error | -3/4 | ±1/2 | 3/4 | LSB |
| Settling Time to ±1/2 LSB | 8 | 10 | 10 | μs |
| Temperature Range | -40 | 85 | °C |
Key Features
- Four complete 12-bit, voltage-output DACs on a single monolithic IC chip.
- Double-buffered input latch structure and data readback function for each DAC.
- Microprocessor-compatible I/O port supporting 4-bit, 8-bit, or 12-bit parallel words.
- Reset to zero control pin to reset all DAC outputs to zero.
- Transparent mode for immediate response of outputs to input data.
- Programmable output range for each DAC: unipolar or bipolar with a gain of one or two times the reference voltage.
- Monotonic performance over the full operating temperature range.
- Tristate outputs on readback buffers.
- Multiplying-mode operation with fixed or variable, positive or negative external references.
- Compliance with MIL-STD-883 for certain versions.
Applications
- Process control systems.
- Disk drives and storage systems.
- Instrumentation and measurement equipment.
- Avionics and aerospace applications.
Q & A
- What is the resolution of the AD664BE DAC?
The AD664BE has a resolution of 12 bits.
- What are the output voltage ranges for the AD664BE?
The output voltage ranges are programmable to either unipolar (0 to VCC - 2.02V) or bipolar (VEE + 2.02V to VCC - 2.02V).
- How does the AD664BE interface with microprocessors?
The AD664BE interfaces through a single microprocessor-compatible I/O port that accommodates 4-bit, 8-bit, or 12-bit parallel words.
- What is the purpose of the reset to zero control pin?
The reset to zero control pin allows the user to simultaneously reset all DAC outputs to zero, regardless of the contents of the input latch.
- Can the AD664BE operate in transparent mode?
- What is the temperature range for the AD664BE?
The temperature range is -40°C to +85°C.
- Is the AD664BE compliant with any military standards?
- What is the settling time for the AD664BE?
The settling time to ±1/2 LSB is typically 10 μs.
- Can the AD664BE be used with variable external references?
- What are some common applications of the AD664BE?
