Overview
The AD9762AR is a high-performance, 12-bit digital-to-analog converter (DAC) produced by Analog Devices Inc. It is part of the TxDAC family, which is optimized for the transmit signal path in communication systems. This DAC is known for its low power consumption, high update rates, and excellent dynamic performance, making it suitable for a variety of applications, including communication systems, instrumentation, and direct digital synthesis (DDS).
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | - | - | 12 Bits | - |
| Integral Linearity Error (INL) | -2.5 | ±0.75 | +2.5 | LSB (at TA = +25°C) |
| Differential Nonlinearity (DNL) | -1.5 | ±0.5 | +1.5 | LSB (at TA = +25°C) |
| Output Update Rate (fCLOCK) | - | - | 125 MSPS | - |
| Output Settling Time (tST) | - | 35 ns | - | - |
| Supply Voltage | 2.7 V | - | 5.5 V | - |
| Power Dissipation | - | 175 mW @ 5 V | - | - |
| Package | - | - | 28-Lead SOIC and TSSOP | - |
| Output Impedance | - | - | > 100 kΩ | - |
| Full-Scale Output Current | 2 mA | - | 20 mA | - |
Key Features
- 12-bit resolution with a nominal full-scale output current of 20 mA and > 100 kΩ output impedance.
- High update rate of up to 125 MSPS, making it suitable for high-speed applications.
- Excellent spurious-free dynamic range (SFDR) performance, with SFDR to Nyquist at 5 MHz output: 70 dBc.
- Flexible single-supply operation from 2.7 V to 5.5 V, supporting both +3 V and +5 V CMOS logic families.
- Low power dissipation, with a maximum of 175 mW at 5 V and a power-down mode reducing standby power to approximately 25 mW.
- Edge-triggered input latches and a 1.2 V temperature-compensated bandgap reference for a complete monolithic DAC solution.
- Segmented current source architecture combined with a proprietary switching technique to reduce spurious components and enhance dynamic performance.
Applications
- Communication systems: Basestations (single/multichannel applications), ADSL/HFC modems.
- Direct Digital Synthesis (DDS).
- Instrumentation.
- Portable and low-power applications due to its flexible supply options and low power dissipation.
Q & A
- What is the resolution of the AD9762AR DAC?
The AD9762AR has a 12-bit resolution.
- What is the maximum update rate of the AD9762AR?
The AD9762AR can update at rates up to 125 MSPS.
- What are the supply voltage options for the AD9762AR?
The AD9762AR can operate from a single supply voltage ranging from 2.7 V to 5.5 V.
- What is the full-scale output current range of the AD9762AR?
The full-scale output current can be adjusted from 2 mA to 20 mA.
- What is the output impedance of the AD9762AR?
The output impedance is greater than 100 kΩ.
- What are the package options for the AD9762AR?
The AD9762AR is available in 28-Lead SOIC and TSSOP packages.
- How much power does the AD9762AR dissipate at 5 V?
The AD9762AR dissipates a maximum of 175 mW at 5 V.
- Does the AD9762AR have a power-down mode?
Yes, the AD9762AR has a power-down mode that reduces standby power dissipation to approximately 25 mW.
- What is the settling time of the AD9762AR?
The output settling time (tST) is typically 35 ns.
- What are some common applications of the AD9762AR?
Common applications include communication systems, direct digital synthesis (DDS), and instrumentation.
