Overview
The AD9761ARSZ is a high-performance, dual-channel digital-to-analog converter (DAC) produced by Analog Devices Inc. This component is specifically designed for wide bandwidth communication applications, such as spread spectrum systems, where digital I and Q information is processed during transmit operations. The AD9761 integrates two 10-bit, 40 MSPS DACs, dual 2x interpolation filters, a voltage reference, and digital input interface circuitry, making it a complete solution for high-speed transmission needs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 10 Bits | |
| Sampling Rate | 40 MSPS | |
| Input Data Rate | 20 MSPS per channel | |
| Interpolation Filters | Dual 2x FIR interpolation filters | |
| Voltage Reference | 1.20 V temperature-compensated bandgap reference | |
| Supply Voltage | 2.7 V to 5.5 V (digital), 3.0 V to 5.5 V (analog) | V |
| Power Consumption | 200 mW (at 5 V supply) | mW |
| Full-Scale Current | 10 mA | mA |
| Package | 28-Lead SSOP |
Key Features
- Dual 10-bit, 40 MSPS DACs optimized for low distortion performance, suitable for transmitting I and Q information.
- Dual 2x digital interpolation filters with 62.5 dB stop-band rejection to reduce reconstruction filter requirements.
- Low power consumption: operates on a single supply from 3 V to 5.5 V, with a power consumption of 200 mW.
- On-chip 1.20 V temperature-compensated bandgap voltage reference.
- Flexible digital interface allowing various update rates and addressing modes.
- Compact 28-lead SSOP package.
- Sleep mode for power reduction during idle periods.
Applications
The AD9761ARSZ is particularly suited for wide bandwidth communication applications, including:
- Spread spectrum systems.
- Wireless communication systems.
- Baseband transmission systems.
- High-speed data transmission systems.
Q & A
- What is the resolution and sampling rate of the AD9761ARSZ?
The AD9761ARSZ has a resolution of 10 bits and a sampling rate of 40 MSPS.
- What type of interpolation filters does the AD9761ARSZ include?
The AD9761ARSZ includes dual 2x FIR interpolation filters.
- What is the voltage range for the supply voltage of the AD9761ARSZ?
The supply voltage range is 2.7 V to 5.5 V for the digital section and 3.0 V to 5.5 V for the analog section.
- How much power does the AD9761ARSZ consume?
The AD9761ARSZ consumes 200 mW of power at a 5 V supply.
- What is the full-scale current output of each DAC?
Each DAC provides a nominal full-scale current of 10 mA.
- Does the AD9761ARSZ have an on-chip voltage reference?
Yes, the AD9761ARSZ includes a 1.20 V temperature-compensated bandgap voltage reference.
- What package type is the AD9761ARSZ available in?
The AD9761ARSZ is available in a 28-lead SSOP package.
- Can the AD9761ARSZ operate in sleep mode to reduce power consumption?
Yes, the AD9761ARSZ has a sleep mode for power reduction during idle periods.
- What are some typical applications for the AD9761ARSZ?
The AD9761ARSZ is typically used in spread spectrum systems, wireless communication systems, baseband transmission systems, and high-speed data transmission systems.
- How does the AD9761ARSZ handle I and Q data?
The AD9761ARSZ de-interleaves the I and Q input data stream, processes it through 2x digital interpolation filters, and then updates each DAC simultaneously.
