Overview
The AD9742ARZ is a 12-bit, high-speed digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It is part of the TxDAC family, which includes pin-compatible 8-, 10-, 12-, and 14-bit DACs optimized for the transmit signal path of communication systems. The AD9742 offers exceptional AC and DC performance, supporting update rates up to 210 MSPS. This DAC is well-suited for portable and low-power applications due to its low power dissipation, which can be further reduced through adjustable full-scale current output and a power-down mode.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 12 | - | - | Bits |
| Update Rate | - | - | 210 | MSPS |
| Power Supply Voltage | 2.7 | 3.3 | 3.6 | V |
| Power Dissipation (Typical) | - | 135 | - | mW |
| Power Dissipation (Sleep Mode) | - | 15 | - | mW |
| Full-Scale Current Output | - | 20 | - | mA |
| Temperature Range | -40 | - | 85 | °C |
| Package Type | - | - | - | 28-Lead SOIC, TSSOP, LFCSP |
Key Features
- High-speed, single-ended CMOS clock input supporting up to 210 MSPS conversion rate.
- Low power operation: Complete CMOS DAC function operates on 135 mW from a 2.7 V to 3.6 V single supply. Power dissipation can be reduced further by lowering the full-scale current output or using the sleep mode.
- On-chip voltage reference: 1.2 V temperature compensated band gap voltage reference.
- Segmented current source architecture combined with a proprietary switching technique to reduce spurious components and enhance dynamic performance.
- Edge-triggered input latches and support for 3 V CMOS logic families.
- Industry-standard packages: 28-lead SOIC, 28-lead TSSOP, and 32-lead LFCSP.
Applications
- Transmit signal path of communication systems.
- Portable and low-power applications.
- Wireless communication systems.
- Baseband and intermediate frequency (IF) signal processing.
- Direct digital synthesis (DDS) systems.
Q & A
- What is the resolution of the AD9742ARZ DAC?
The AD9742ARZ has a 12-bit resolution.
- What is the maximum update rate of the AD9742ARZ?
The AD9742ARZ supports update rates up to 210 MSPS.
- What is the typical power dissipation of the AD9742ARZ?
The typical power dissipation is 135 mW from a 2.7 V to 3.6 V single supply.
- How can the power dissipation of the AD9742ARZ be reduced?
Power dissipation can be reduced by lowering the full-scale current output or using the sleep mode, which reduces standby power to approximately 15 mW.
- What type of voltage reference does the AD9742ARZ include?
The AD9742ARZ includes a 1.2 V temperature compensated band gap voltage reference.
- What are the supported package types for the AD9742ARZ?
The AD9742ARZ is available in 28-lead SOIC, 28-lead TSSOP, and 32-lead LFCSP packages.
- What is the temperature range for the AD9742ARZ?
The operating temperature range is -40°C to 85°C.
- Does the AD9742ARZ support 3 V CMOS logic families?
- What is the architecture of the current sources in the AD9742ARZ?
The AD9742ARZ uses a segmented current source architecture combined with a proprietary switching technique.
- What are some common applications of the AD9742ARZ?
