Overview
The AD7948BRSZ is a 12-bit multiplying Digital-to-Analog Converter (DAC) produced by Analog Devices Inc. This component is part of the AD7943, AD7945, and AD7948 family, which are designed to operate from a single +5 V supply (Normal Mode) and a single +3.3 V to +5 V supply (Biased Mode). The AD7948 specifically features an 8-bit byte interface, making it suitable for applications requiring fast and efficient data conversion with low power consumption.
Key Specifications
| Parameter | Value | Units | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 12 | Bits | |
| Supply Voltage Range | 4.5 to 5.5 | V | Normal Mode |
| Supply Voltage Range | 3.3 to 5 | V | Biased Mode |
| Power Consumption (Typical) | 5 | µA | VINH = VDD – 0.1 V, VINL = 0.1 V |
| Integral Nonlinearity (INL) | 0.5 | LSB | |
| Differential Nonlinearity (DNL) | 0.5 | LSB | |
| Settling Time | 600 | ns | To 0.01% with AD843 |
| Data Setup Time (tDS) | 45/30 | ns | VDD = +3 V to +3.6 V / VDD = +4.5 V to +5.5 V |
| Data Hold Time (tDH) | 10 | ns | |
| Write Pulsewidth (tWR) | 60/40 | ns | VDD = +3 V to +3.6 V / VDD = +4.5 V to +5.5 V |
Key Features
- 12-bit multiplying DAC with an 8-bit byte interface
- Operates from a single +5 V supply (Normal Mode) and a single +3.3 V to +5 V supply (Biased Mode)
- Low power consumption: 5 µA typical
- Fast settling time: 600 ns to 0.01% with AD843
- Low glitch: 60 nV-s with amplifier connected
- Fast interface: 40 ns strobe pulsewidth (AD7943), 40 ns write pulsewidth (AD7945, AD7948)
- Available in 20-pin DIP, 20-pin SOP, and 20-pin SSOP packages
Applications
- Battery-powered instrumentation
- Laptop computers
- Upgrades for all 754x series DACs (5 V designs)
Q & A
- What is the resolution of the AD7948BRSZ?
The AD7948BRSZ has a resolution of 12 bits. - What are the supply voltage ranges for the AD7948BRSZ?
The AD7948BRSZ operates from a single +5 V supply (Normal Mode) and a single +3.3 V to +5 V supply (Biased Mode). - What is the typical power consumption of the AD7948BRSZ?
The typical power consumption is 5 µA. - What is the settling time of the AD7948BRSZ?
The settling time is 600 ns to 0.01% with AD843. - What interface does the AD7948BRSZ use?
The AD7948BRSZ uses an 8-bit byte interface. - What are the available package types for the AD7948BRSZ?
The AD7948BRSZ is available in 20-pin DIP, 20-pin SOP, and 20-pin SSOP packages. - What are some common applications of the AD7948BRSZ?
Common applications include battery-powered instrumentation, laptop computers, and upgrades for all 754x series DACs (5 V designs). - How does the AD7948BRSZ compare to older DAC models?
The AD7948BRSZ offers superior speed and power consumption performance compared to older models like the AD7543, AD7545, and AD7548. - What is the integral nonlinearity (INL) and differential nonlinearity (DNL) of the AD7948BRSZ?
The INL and DNL are both 0.5 LSB. - Is the AD7948BRSZ RoHS compliant?
Yes, the AD7948BRSZ is RoHS compliant.
