Overview
The AD9750ARU, produced by Analog Devices Inc., is a 10-bit resolution, high-performance digital-to-analog converter (DAC) that is part of the TxDAC series. This second-generation DAC is optimized for the transmit signal path in communication systems. It offers exceptional AC and DC performance, supporting update rates up to 125 MSPS. The AD9750 is manufactured on an advanced CMOS process, combining a segmented current source architecture with a proprietary switching technique to enhance dynamic performance and reduce spurious components.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | 10 | - | - | Bits |
| Integral Linearity Error (INL) | -1.0 | ±0.1 | +1.0 | LSB |
| Differential Nonlinearity (DNL) | -0.5 | ±0.1 | +0.5 | LSB |
| Analog Output Offset Error | -0.02 | - | +0.02 | % of FSR |
| Analog Output Gain Error (Without Internal Reference) | -2 | ±0.5 | +2 | % of FSR |
| Analog Output Gain Error (With Internal Reference) | -5 | ±1.5 | +5 | % of FSR |
| Full-Scale Output Current | 2.0 | - | 20.0 | mA |
| Output Compliance Range | -1.0 | - | 1.25 | V |
| Output Resistance | - | - | 100 | kΩ |
| Output Capacitance | - | - | 5 | pF |
| Reference Voltage | 1.14 | 1.20 | 1.26 | V |
| Maximum Output Update Rate (fCLOCK) | - | - | 125 | MSPS |
| Output Settling Time (tST) (to 0.1%) | - | - | 35 | 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 |
Key Features
- High performance with 10-bit resolution and 125 MSPS update rate.
- Segmented current source architecture combined with proprietary switching technique to enhance dynamic performance.
- Edge-triggered input latches and a 1.2 V temperature-compensated bandgap reference for a complete monolithic DAC solution.
- Flexible single-supply operating range of 4.5 V to 5.5 V.
- Low power dissipation: 190 mW at 5 V, and 20 mW in power-down mode.
- Differential current outputs adjustable from 2 mA to 20 mA.
- CMOS-compatible digital interface supporting +2.7 V to +5.5 V logic levels.
- Available in 28-lead SOIC and TSSOP packages.
Applications
- Wideband communication systems.
- Transmit channel in direct IF basestations and wireless local loop systems.
- Digital radio links.
- Direct digital synthesis (DDS).
- Instrumentation.
Q & A
- What is the resolution of the AD9750?
The AD9750 has a 10-bit resolution.
- What is the maximum update rate of the AD9750?
The AD9750 supports update rates up to 125 MSPS.
- What is the power dissipation of the AD9750 at 5 V?
The power dissipation is 190 mW at 5 V, and it can be reduced to 20 mW in power-down mode.
- What are the output current ranges of the AD9750?
The differential current outputs are adjustable from 2 mA to 20 mA.
- What are the package options for the AD9750?
The AD9750 is available in 28-lead SOIC and TSSOP packages.
- What is the operating voltage range of the AD9750?
The AD9750 operates from a single supply of 4.5 V to 5.5 V.
- Does the AD9750 have an internal reference voltage?
Yes, the AD9750 includes a 1.2 V temperature-compensated bandgap reference.
- What are some typical applications of the AD9750?
Typical applications include wideband communication systems, transmit channels in basestations, digital radio links, and instrumentation.
- How does the AD9750 reduce spurious components?
The AD9750 uses a segmented current source architecture combined with a proprietary switching technique to reduce spurious components and enhance dynamic performance.
- Is the AD9750 compatible with different logic levels?
Yes, the AD9750 supports CMOS-compatible digital interfaces with +2.7 V to +5.5 V logic levels.
