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AD8804AN
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Product Detailed Parameters
- Description：IC DAC 8BIT 12CH W/SD 20-DIP
- Series：TrimDAC®
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：-
- Number of D/A Converters：-
- Settling Time：-
- Output Type：-
- Differential Output：-
- Data Interface：-
- Reference Type：-
- Voltage - Supply, Analog：-
- Voltage - Supply, Digital：-
- INL/DNL (LSB)：-
- Architecture：-
- Operating Temperature：-
- Package / Case：20-DIP (0.300", 7.62mm)
- Supplier Device Package：20-PDIP
- Mounting Type：Through Hole
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Overview
The AD8804AN is a 12-channel, 8-bit digital-to-analog converter (DAC) in a 20-lead PDIP package. It functions as a potentiometer divider TrimDAC with independent digitally controllable voltage outputs. The device features a separate VREFL pin for zero-scale setting and operates on a single +3 V to +5 V supply. Static accuracy includes ±1 LSB differential nonlinearity and ±1.5 LSB integral nonlinearity. Settling time is 600 ns, with power consumption under 55 μW in shutdown mode.
Feature Summary
- 12 individually programmable DAC channels
- Separate VREFL pin for independent zero-scale adjustment
- 3-wire SPI compatible serial interface
- Power shutdown mode with latch retention
Applications
- Video and audio equipment gain/offset adjustment
- CRT geometric correction
- Portable battery-operated equipment
Procurement Notes
Verify the 'AN' suffix indicates the PDIP-20 package and -40°C to +85°C temperature range. Confirm current availability status as older Analog Devices components may be obsolete or limited stock.
Selection Notes
Select AD8804AN over AD8802AN when independent zero-scale voltage control via an external VREFL input is required. Ensure the 5 kΩ output impedance meets load requirements without buffering.
Part Context
Part of the AD8802/AD8804 family. The AD8804 variant specifically adds the VREFL pin compared to the AD8802's midscale preset feature. Both share identical serial interfaces and channel counts.
Replacement Considerations
No direct public substitutes listed. Check for AD8804AR (SOIC) or AD8804ARU (TSSOP) if package changes are acceptable.
FAQ
How does the AD8804 differ from the AD8802?
The AD8804 includes a VREFL pin for independent zero-scale voltage setting, whereas the AD8802 uses a fixed GND connection and offers a midscale preset via the RS pin.
What is the maximum serial clock speed?
The datasheet specifies a minimum clock pulse width of 15 ns, supporting speeds up to approximately 33 MHz for fast data loading.
Can digital inputs exceed VDD?
Yes, digital inputs are protected by series resistors and Zener structures, allowing 5 V logic levels even when VDD is 3 V.
