Overview
The AD7809BSTZ is an octal 10-bit digital-to-analog converter (DAC) produced by Analog Devices Inc. This component is part of the AD7805/AD7809 series, which offers parallel loading capabilities. The AD7809 operates from a +3.3 V to +5 V power supply and includes an on-chip reference, making it a versatile and reliable choice for various applications. It features on-chip control registers, double-buffered data inputs, and the ability to update all analog outputs simultaneously using the asynchronous LDAC input.
Key Specifications
| Parameter | Value | Units | Comments |
|---|---|---|---|
| Resolution | 10 | Bits | Main DAC |
| Relative Accuracy | ±3 | LSB max | |
| Gain Error | ±3 | % FSR max | |
| Bias Offset Error | –80/+40 | mV max | DAC Code = 0.5 Full Scale |
| Zero-Scale Error | ±35 | mV max | DAC Code = 000H for Offset Binary, 200H for Twos Complement Coding |
| Minimum Load Resistance | 2 kΩ min | ||
| Output Voltage Range | VBIAS ± 15/16 × VBIAS | V | |
| Supply Voltage | +3.3 V to +5 V (±10%) | V | |
| Package | 44-Lead TQFP (10mm x 10mm) | ||
| Settling Time | 4 μs | ||
| Integral Nonlinearity (INL) | 4 LSB |
Key Features
- Octal 10-bit digital-to-analog converter with parallel loading capabilities
- Operates from a +3.3 V to +5 V power supply
- On-chip reference and on-chip control registers (system control register and channel control registers)
- Double-buffered data inputs allowing simultaneous update of all analog outputs using the asynchronous LDAC input
- Power-down mode and standby mode (all DACs/individual DACs)
- Low power consumption with all CMOS construction
- Dual external reference capability
Applications
- Optical disk drives
- Instrumentation and communication systems
- Process control and voltage setpoint control
- Trim potentiometer replacement
- Automatic calibration
Q & A
- What is the resolution of the AD7809BSTZ?
The AD7809BSTZ has a resolution of 10 bits. - What is the operating voltage range of the AD7809BSTZ?
The AD7809BSTZ operates from a +3.3 V to +5 V power supply. - Does the AD7809BSTZ have an on-chip reference?
Yes, the AD7809BSTZ includes an on-chip reference. - What is the package type of the AD7809BSTZ?
The AD7809BSTZ comes in a 44-Lead TQFP (10mm x 10mm) package. - What are the key applications of the AD7809BSTZ?
The AD7809BSTZ is used in optical disk drives, instrumentation and communication systems, process control, voltage setpoint control, trim potentiometer replacement, and automatic calibration. - Does the AD7809BSTZ support power-down and standby modes?
Yes, the AD7809BSTZ supports power-down and standby modes for all DACs or individual DACs. - What is the settling time of the AD7809BSTZ?
The settling time of the AD7809BSTZ is 4 μs. - Is the AD7809BSTZ suitable for low power applications?
Yes, the AD7809BSTZ is designed with low power consumption in mind, using all CMOS construction. - Can the AD7809BSTZ be used with external references?
Yes, the AD7809BSTZ has dual external reference capability. - How are the analog outputs updated in the AD7809BSTZ?
The analog outputs in the AD7809BSTZ can be updated simultaneously using the asynchronous LDAC input due to its double-buffered data inputs.
