Overview
The AD9762ARU is a 12-bit, high-performance, low-power CMOS digital-to-analog converter (DAC) from Analog Devices Inc. It is part of the TxDAC series, which includes pin-compatible 8-, 10-, 12-, and 14-bit DACs optimized for the transmit signal path of communication systems. The AD9762 offers exceptional AC and DC performance, supporting update rates up to 125 MSPS. It features a flexible single-supply operating range of 2.7 V to 5.5 V, making it suitable for portable and low-power applications. The DAC is manufactured on an advanced CMOS process and includes a segmented current source architecture and a proprietary switching technique to enhance dynamic performance.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | 12 | Bits | ||
| Integral Linearity Error (INL) | -2.5 | ±0.75 | +2.5 | LSB |
| Differential Nonlinearity (DNL) | -1.5 | ±0.5 | +1.5 | LSB |
| Offset Error | -0.025 | +0.025 | % of FSR | |
| Gain Error (Without Internal Reference) | -10 | ±2 | % of FSR | |
| Full-Scale Output Current | 2 | 20 | mA | |
| Output Impedance | >100 kΩ | Ω | ||
| Maximum Output Update Rate | 125 | MSPS | ||
| Output Settling Time (to 0.1%) | 35 | ns | ||
| Power Dissipation @ 5 V | 175 | mW | ||
| Power Dissipation @ 3 V | 45 | mW | ||
| Power-Down Mode @ 5 V | 25 | mW | ||
| Operating Temperature | -40 | +85 | °C | |
| Supply Voltage Range | 2.7 | 5.5 | V |
Key Features
- 12-bit resolution with high accuracy and linearity (INL: ±0.75 LSB, DNL: ±0.5 LSB).
- High-speed operation with update rates up to 125 MSPS.
- 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: 175 mW at 5 V and 45 mW at 3 V, with a power-down mode reducing standby power to 25 mW at 5 V.
- On-chip 1.2 V temperature-compensated bandgap reference and internal control amplifier for full-scale current adjustment (2 mA to 20 mA).
- Differential current outputs for single-ended or differential applications, with >100 kΩ output impedance.
- Edge-triggered input latches and segmented current source architecture for enhanced dynamic performance.
- Available in 28-lead SOIC and TSSOP packages.
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 voltage range and low power dissipation.
Q & A
- What is the resolution of the AD9762ARU?
The AD9762ARU has a 12-bit resolution.
- What is the maximum update rate of the AD9762ARU?
The maximum update rate is 125 MSPS.
- What is the operating voltage range of the AD9762ARU?
The operating voltage range is from 2.7 V to 5.5 V.
- What is the power dissipation of the AD9762ARU at 5 V and 3 V?
At 5 V, the power dissipation is 175 mW, and at 3 V, it is 45 mW.
- Does the AD9762ARU have a power-down mode?
Yes, the power-down mode reduces the standby power dissipation to approximately 25 mW at 5 V.
- What type of output does the AD9762ARU provide?
The AD9762ARU provides differential current outputs.
- What is the output impedance of the AD9762ARU?
The output impedance is greater than 100 kΩ.
- What is the full-scale output current range of the AD9762ARU?
The full-scale output current can be adjusted from 2 mA to 20 mA.
- In what packages is the AD9762ARU available?
The AD9762ARU is available in 28-lead SOIC and TSSOP packages.
- What are some typical applications of the AD9762ARU?
Typical applications include communication systems, direct digital synthesis (DDS), and instrumentation.
