Overview
The AD9740ACPRL7 is a 10-bit resolution, high-performance digital-to-analog converter (DAC) from Analog Devices Inc. It is part of the TxDAC series, optimized for the transmit signal path of communication systems. This DAC is known for its exceptional AC and DC performance, supporting update rates up to 210 MSPS. The AD9740 is designed for low power applications, operating on a single supply voltage of 2.7 V to 3.6 V and dissipating only 135 mW. It also features a power-down mode to reduce standby power to approximately 15 mW.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 10 bits | |||
| Maximum Output Update Rate (fCLOCK) | 210 | MSPS | ||
| Output Settling Time (tST) (to 0.1%) | 11 | ns | ||
| Output Propagation Delay (tPD) | 1 | ns | ||
| Glitch Impulse | 5 | pV-s | ||
| Output Rise Time (10% to 90%) | 2.5 | ns | ||
| Output Fall Time (10% to 90%) | 2.5 | ns | ||
| Output Noise (IOUTFS = 20 mA) | 50 | pA/√Hz | ||
| Power Supply Voltage | 2.7 | 3.6 | V | |
| Power Dissipation | 135 | mW | ||
| Standby Power Dissipation | 15 | mW | ||
Key Features
- Data input supports twos complement or straight binary data coding.
- High-speed, single-ended CMOS clock input supports up to 210 MSPS conversion rate.
- Low power operation: Complete CMOS DAC function with power dissipation of 135 mW from a 2.7 V to 3.6 V single supply.
- 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 separate power supply inputs for analog and digital sections.
- Available in industry-standard 28-lead SOIC, 28-lead TSSOP, and 32-lead LFCSP packages.
Applications
- Communication systems: Optimized for the transmit signal path.
- Portable and low power applications: Suitable due to its low power dissipation and power-down mode.
- High-speed data conversion: Ideal for applications requiring high update rates and low noise.
- Digital signal processing: Used in various DSP applications where high-speed and low power are critical.
Q & A
- What is the resolution of the AD9740?
The AD9740 has a 10-bit resolution.
- What is the maximum output update rate of the AD9740?
The maximum output update rate is up to 210 MSPS.
- What is the power dissipation of the AD9740?
The power dissipation is 135 mW from a 2.7 V to 3.6 V single supply.
- Does the AD9740 have a power-down mode?
Yes, it has a power-down mode that reduces standby power dissipation to approximately 15 mW.
- What types of data coding does the AD9740 support?
The AD9740 supports twos complement or straight binary data coding.
- What is the output settling time of the AD9740?
The output settling time is 11 ns (to 0.1%).
- What is the output noise of the AD9740?
The output noise is 50 pA/√Hz for IOUTFS = 20 mA.
- What are the available package options for the AD9740?
The AD9740 is available in 28-lead SOIC, 28-lead TSSOP, and 32-lead LFCSP packages.
- Does the AD9740 have an on-chip voltage reference?
Yes, it includes a 1.2 V temperature-compensated band gap voltage reference.
- What logic family does the AD9740 support for digital inputs?
The AD9740 supports 3 V CMOS logic families.
