Overview
The AD9755AST is a high-speed, single-channel, 14-bit CMOS Digital-to-Analog Converter (DAC) produced by Analog Devices Inc. This device is part of the TxDAC+ family and is designed for ultrahigh-speed applications, supporting update rates up to 300 Mega Samples Per Second (MSPS). The AD9755AST integrates a high-quality 14-bit TxDAC+ core, a voltage reference, and digital interface circuitry into a compact 48-lead LQFP package.
The device features a flexible digital interface, allowing high-speed data conversion through either a single or dual port input. It operates from a single supply of 3.0 V to 3.6 V and consumes 155 mW of power, making it suitable for power-sensitive applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 14 Bits | |||
| Update Rate | 300 MSPS | |||
| Integral Linearity Error (INL) | -5 | ±2.5 | +5 | LSB |
| Differential Nonlinearity (DNL) | ±1.5 | LSB | ||
| Supply Voltage | 3.0 V | 3.6 V | V | |
| Power Consumption | 155 mW | |||
| Operating Temperature | -40°C | 85°C | °C | |
| Package Type | 48-Lead LQFP | |||
| Settling Time | 11 ns | ns | ||
| Output Type | Current - Unbuffered | |||
| Differential Output | Yes | |||
Key Features
- Ultrahigh speed conversion rate up to 300 MSPS.
- Dual 14-bit latched, multiplexed input ports for flexible data input.
- On-chip 1.2 V temperature-compensated band gap voltage reference.
- Internal clock doubling PLL and differential or single-ended clock input.
- Low power consumption of 155 mW from a single 3.0 V to 3.6 V supply.
- Differential current outputs supporting single-ended or differential applications.
- Segmented current source architecture combined with proprietary switching technique to reduce glitch energy and maximize dynamic accuracy.
Applications
- Communications: LMDS, LMCS, MMDS base stations.
- Digital synthesis.
- QAM and OFDM modulation.
- Medical and other high-speed data conversion applications.
Q & A
- What is the resolution of the AD9755AST DAC?
The AD9755AST has a resolution of 14 bits.
- What is the maximum update rate of the AD9755AST?
The maximum update rate is up to 300 MSPS.
- What is the supply voltage range for the AD9755AST?
The supply voltage range is from 3.0 V to 3.6 V.
- How much power does the AD9755AST consume?
The device consumes 155 mW of power.
- What type of output does the AD9755AST provide?
The AD9755AST provides current - unbuffered outputs, with differential output capability.
- What is the operating temperature range of the AD9755AST?
The operating temperature range is from -40°C to 85°C.
- What is the package type of the AD9755AST?
The package type is a 48-lead LQFP.
- Does the AD9755AST have an on-chip voltage reference?
Yes, it includes a 1.2 V temperature-compensated band gap voltage reference.
- What are some common applications of the AD9755AST?
Common applications include communications (LMDS, LMCS, MMDS base stations), digital synthesis, QAM and OFDM modulation, and medical applications.
- Does the AD9755AST support internal clock doubling?
Yes, it supports internal clock doubling with a PLL and can accept differential or single-ended clock inputs.
