Overview
The AD7948BN, produced by Analog Devices Inc., is a high-performance 12-bit multiplying Digital-to-Analog Converter (DAC). This component operates from a single +5 V supply in Normal Mode and can also function with a single +3.3 V to +5 V supply in Biased Mode. The AD7948 features an 8-bit byte interface, making it versatile for various applications requiring precise analog output control.
The AD7948 is designed to replace industry-standard DACs such as the AD7548, offering superior speed and power consumption performance. It is available in several package options, including 20-lead DIP, 20-lead SOP, and 20-lead SSOP, catering to different design requirements.
Key Specifications
| Parameter | Units | Min | Typ | Max | Test Conditions/Comments |
|---|---|---|---|---|---|
| Resolution | Bits | 12 | |||
| Relative Accuracy | LSB | ±0.5 | VDD = +4.5 V to +5.5 V; VREF = 6 V rms, 1 kHz sine wave; TA = TMIN to TMAX | ||
| Output Voltage Settling Time | µs | 5 | To 0.01% of Full-Scale Range | ||
| Power Consumption | mW | 5 | Typical at +5 V supply | ||
| Operating Temperature | °C | -40 | 85 | ||
| Interface Type | 8-bit Byte Interface | ||||
| Package Options | 20-lead DIP, 20-lead SOP, 20-lead SSOP |
Key Features
- High Resolution: 12-bit multiplying DAC ensuring high precision in analog output.
- Low Power Consumption: Typical power consumption of 5 mW at +5 V supply, making it suitable for battery-powered applications.
- Fast Interface: 40 ns Write Pulsewidth and fast settling time of 600 ns to 0.01% of full-scale range.
- Low Glitch: Minimal output glitch of 60 nV-s with an amplifier connected.
- Versatile Supply Voltage: Operates from a single +5 V supply or a single +3.3 V to +5 V supply in Biased Mode.
- Multiple Package Options: Available in 20-lead DIP, 20-lead SOP, and 20-lead SSOP packages.
Applications
- Battery-Powered Instrumentation: Ideal for devices requiring low power consumption and high precision.
- Laptop Computers and Upgrades: Can be used in laptop computers and as upgrades for older DAC designs.
- General Instrumentation: Suitable for various instrumentation applications requiring accurate analog output.
Q & A
- What is the resolution of the AD7948BN DAC?
The AD7948BN has a resolution of 12 bits.
- What are the operating supply voltage ranges for the AD7948BN?
The AD7948BN operates from a single +5 V supply in Normal Mode and from a single +3.3 V to +5 V supply in Biased Mode.
- What is the typical power consumption of the AD7948BN?
The typical power consumption is 5 mW at +5 V supply.
- What is the settling time of the AD7948BN DAC?
The settling time is typically 600 ns to 0.01% of full-scale range.
- What types of interfaces does the AD7948BN support?
The AD7948BN supports an 8-bit byte interface.
- In what packages is the AD7948BN available?
The AD7948BN is available in 20-lead DIP, 20-lead SOP, and 20-lead SSOP packages.
- What are some common applications for the AD7948BN?
Common applications include battery-powered instrumentation, laptop computers, and general instrumentation.
- How does the AD7948BN compare to older DAC models like the AD7548?
The AD7948BN offers superior speed and power consumption performance compared to older models like the AD7548.
- What is the operating temperature range for the AD7948BN?
The operating temperature range is -40°C to +85°C.
- Does the AD7948BN have any specific requirements for the reference voltage?
The AD7948BN uses an external reference voltage, which can be up to VDD.
