Overview
The AD9709ASTZRL is a high-speed, dual-port, 2-channel, 8-bit CMOS Digital-to-Analog Converter (DAC) produced by Analog Devices Inc. This device integrates two high-quality 8-bit TxDAC+ cores, a voltage reference, and digital interface circuitry into a compact 48-lead LQFP package. The AD9709 is optimized for processing I and Q data in communications applications and offers exceptional AC and DC performance, supporting update rates of up to 125 MSPS.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Resolution | 8-bit | |
| Update Rate | Up to 125 MSPS | |
| Supply Voltage | 3.3 V or 5 V | |
| Power Consumption | 380 mW @ 5 V, 50 mW @ 5 V in power-down mode | |
| Full-Scale Current | 20 mA nominal | |
| Gain Matching | Typically 0.1% of full scale | |
| Offset Error | Better than 0.02% | |
| Channel Isolation | 85 dBc @ 10 MHz, 77 dBc @ 40 MHz | fCLK = 125 MSPS |
| Package Type | 48-Lead LQFP (7mm x 7mm) |
Key Features
- Dual 8-bit, 125 MSPS DACs optimized for low distortion performance, particularly for I and Q data transmission in communications.
- Excellent gain and offset matching: gain matching is typically 0.1% of full scale, and offset error is better than 0.02%.
- Low power operation: consumes 380 mW from a 3.3 V or 5 V single supply, with a sleep mode for low power idle periods.
- On-chip 1.20 V temperature-compensated band gap voltage reference.
- Dual-port or interleaved data input, allowing flexible data interface configurations.
- Segmented current source architecture combined with proprietary switching techniques to reduce glitch energy and maximize dynamic accuracy.
- Differential current output supporting single-ended or differential applications.
Applications
- Communications: base stations, digital synthesis, and quadrature modulation.
- 3D ultrasound systems.
- Any application requiring high-speed, high-accuracy DACs for processing I and Q data.
Q & A
- What is the resolution and update rate of the AD9709ASTZRL DAC?
The AD9709ASTZRL has an 8-bit resolution and supports update rates of up to 125 MSPS.
- What are the supply voltage options for the AD9709ASTZRL?
The device can operate from a single supply of 3.3 V or 5 V.
- How much power does the AD9709ASTZRL consume?
The device consumes 380 mW of power at 5 V and 50 mW in power-down mode.
- What is the full-scale current of the AD9709ASTZRL?
The nominal full-scale current is 20 mA.
- How is the gain of the AD9709ASTZRL controlled?
The gain can be controlled using either two external resistors for independent DACs or a single external resistor for both DACs.
- What is the channel isolation of the AD9709ASTZRL?
The channel isolation is 85 dBc at 10 MHz and 77 dBc at 40 MHz.
- What package type is the AD9709ASTZRL available in?
The device is available in a 48-Lead LQFP (7mm x 7mm) package.
- What are the key applications of the AD9709ASTZRL?
The device is primarily used in communications (base stations, digital synthesis, quadrature modulation) and 3D ultrasound systems.
- Does the AD9709ASTZRL have an on-chip voltage reference?
Yes, it includes a 1.20 V temperature-compensated band gap voltage reference.
- Can the AD9709ASTZRL operate in both dual-port and interleaved modes?
Yes, the device supports both dual-port and interleaved data input configurations.
