Overview
The AD8804ARUZ from Analog Devices Inc. is a 12-channel, 8-bit TrimDAC (digital-to-analog converter) designed to provide independent digitally-controllable voltage outputs. This component is housed in a compact 20-lead TSSOP package and is ideal for replacing mechanical trimmers in new designs. It is particularly suited for dc voltage adjustment applications and can be easily programmed via a 3-wire SPI-compatible serial interface. The AD8804ARUZ offers features such as power shutdown, separate VREFL input for maximizing resolution, and low power consumption, making it versatile for various electronic systems.
Key Specifications
| Category | Specification |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Series | TrimDAC® |
| Package | 20-TSSOP (Tape & Reel, Bulk) |
| RoHS | RoHS Compliant |
| Output Type | Voltage - Unbuffered |
| Part Status | Active |
| Architecture | R-2R |
| INL/DNL (LSB) | ±0.5, ±0.25 |
| Mounting Type | Surface Mount |
| Settling Time | 600 ns (Typical) |
| Data Interface | SPI |
| Number of Bits | 8 |
| Number of D/A Converters | 12 |
| Voltage - Supply, Analog | 2.7 V ~ 5.5 V |
| Voltage - Supply, Digital | 2.7 V ~ 5.5 V |
| Operating Temperature | -40°C ~ 85°C |
Key Features
- Low Cost: Replaces up to 12 potentiometers.
- Individually Programmable Outputs: Each DAC has its own DAC latch.
- 3-Wire SPI Compatible Serial Input: Easy integration with microcontrollers.
- Power Shutdown: Reduces power consumption to <55 μW including IDD & IREF.
- Midscale Preset (AD8802): Ideal for potentiometer replacement where adjustments start at a nominal value.
- Separate VREFL Range Setting (AD8804): Allows independent control of the top and bottom end of the potentiometer divider.
- Single Supply Operation: +3 V to +5 V.
Applications
- Automatic Adjustment: Suitable for applications requiring automatic adjustments.
- Trimmer Replacement: Replaces mechanical trimmers in new designs.
- Video and Audio Equipment: Gain control of video amplifiers, voltage-controlled frequencies, and bandwidths.
- Geometric Correction and Automatic Adjustment: In CRT computer graphic displays.
- Portable and Battery Operated Equipment: Due to low power consumption.
Q & A
- What is the AD8804ARUZ used for? The AD8804ARUZ is used for dc voltage adjustment applications, replacing mechanical trimmers, and in various electronic systems requiring precise voltage control.
- How many channels does the AD8804ARUZ have? The AD8804ARUZ has 12 independent digitally-controllable voltage output channels.
- What is the data interface of the AD8804ARUZ? The AD8804ARUZ uses a 3-wire SPI-compatible serial interface.
- What is the operating temperature range of the AD8804ARUZ? The operating temperature range is -40°C to 85°C.
- What is the power consumption of the AD8804ARUZ in shutdown mode? In shutdown mode, the power consumption is reduced to <55 μW including IDD & IREF.
- What package types are available for the AD8804ARUZ? The AD8804ARUZ is available in 20-lead TSSOP packages.
- Is the AD8804ARUZ RoHS compliant? Yes, the AD8804ARUZ is RoHS compliant.
- What is the settling time of the AD8804ARUZ? The settling time is 600 ns (typical).
- Can the AD8804ARUZ be used in portable devices? Yes, due to its low power consumption, it is suitable for portable and battery-operated equipment.
- How is the AD8804ARUZ programmed? The AD8804ARUZ is programmed via a serial interface using a microcontroller.
