Overview
The AD8842ARZ-REEL is an 8-bit octal, 4-quadrant multiplying, CMOS TrimDAC (Digital-to-Analog Converter) produced by Analog Devices Inc. This device is part of the TrimDAC series and is designed to provide high precision and versatility in various applications. It replaces the need for multiple mechanical potentiometers, offering a more reliable and compact solution. The AD8842 features a low power consumption of 95 mW from ±5 V power supplies and supports a 50 kHz 4-quadrant multiplying bandwidth, making it ideal for signal processing and control in several industries.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 8 bits |
| Number of Channels | 8 individual channels |
| Output Swing | ±3 V |
| Power Supply | ±5 V |
| Power Consumption | 95 mW |
| 4-Quadrant Multiplying Bandwidth | 50 kHz |
| Data Loading Rate | 500 kHz |
| Input Clock Pulse Width | 60 ns (tCH, tCL) |
| Data Setup Time | 40 ns (tDS) |
| Data Hold Time | 20 ns (tDH) |
| CLK to SDO Propagation Delay | 80 ns (tPD) |
| DAC Register Load Pulse Width | 70 ns (tLD) |
| Preset Pulse Width | 50 ns (tPR) |
Key Features
- Low cost and replaces up to 8 potentiometers
- 50 kHz 4-quadrant multiplying bandwidth
- Eight individual channels with separate voltage inputs
- 3-wire serial input interface
- 500 kHz update data loading rate
- Midscale preset, zero volts output
- Internal current conveyor amplifier for improved constant input resistance
- Serial data output pin for daisy chaining multiple devices
Applications
- Automatic adjustment and trimmer replacement
- Vertical deflection amplitude adjustment in video systems
- Waveform generation and modulation
- AC or DC gain control of signals up to 50 kHz bandwidth
- Signal inversion and modulation in various signal processing applications
Q & A
- What is the resolution of the AD8842ARZ-REEL? The AD8842ARZ-REEL has an 8-bit resolution.
- How many channels does the AD8842ARZ-REEL have? The AD8842ARZ-REEL has 8 individual channels.
- What is the output voltage swing of the AD8842ARZ-REEL? The output voltage swing is ±3 V.
- What is the power consumption of the AD8842ARZ-REEL? The power consumption is 95 mW from ±5 V power supplies.
- What is the 4-quadrant multiplying bandwidth of the AD8842ARZ-REEL? The 4-quadrant multiplying bandwidth is 50 kHz.
- How does the AD8842ARZ-REEL interface with other devices? The AD8842ARZ-REEL uses a 3-wire serial input interface and supports daisy chaining for multiple devices.
- What are some common applications of the AD8842ARZ-REEL? Common applications include automatic adjustment, trimmer replacement, vertical deflection amplitude adjustment, and waveform generation and modulation.
- Can the AD8842ARZ-REEL be used for signal inversion and modulation? Yes, the AD8842ARZ-REEL is suitable for signal inversion and modulation due to its 4-quadrant multiplying capability.
- What is the data loading rate of the AD8842ARZ-REEL? The data loading rate is 500 kHz.
- How does the AD8842ARZ-REEL improve input resistance? The AD8842ARZ-REEL uses an internal current conveyor amplifier to improve constant input resistance, eliminating the need for additional input buffer amplifiers.
