on January 26th 2,737

AD9772AAST Chip Guide: Pinout, Features, and Performance

You work with digital signals that need clean and steady analog output, and that’s where the AD9772AAST fits in nicely. This device takes fast-moving parallel data and turns it into accurate analog signals you can rely on. You get 14-bit resolution, high sampling speed, and stable output behavior that holds up during continuous operation. Whether you’re shaping waveforms, driving transmit paths, or building signal sources, this DAC gives you predictable results without making system design overly complicated.

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AD9772AAST Overview

The AD9772AAST is a 14 bit digital to analog converter designed for high speed signal generation in communication and synthesis systems. It converts parallel digital data into accurate analog outputs at high update rates, supporting wideband waveform creation. The device is commonly used in transmitter paths where stable amplitude control and repeatable output behavior are required. Its structure allows straightforward connection to digital processing logic while maintaining predictable signal quality. This part is suited for wireless infrastructure, broadband equipment, and laboratory signal sources that rely on consistent analog conversion performance. Looking for AD9772AAST? Contact us to check current stock, lead time, and pricing.

AD9772AAST Pinout Details

AD9772AAST Pin Description

Pin No.	Mnemonic	Description
1, 2, 19, 20	DCOM	Digital common ground connection.
3	DB13	Most significant data bit input.
4 to 15	DB12 to DB1	Parallel digital data inputs from bit 12 down to bit 1.
16	DB0	Least significant data bit input.
17	MOD0	Digital high-pass filter response control, active high, enables half-wave digital mixing, quarter-wave digital mixing when set high with MOD1.
18	MOD1	Zero-stuffing mode control, active high, enables zero-stuffing, quarter-wave digital mixing when set high with MOD0.
21, 22, 47, 48	DVDD	Digital supply voltage input, 3.1 V to 3.5 V.
23, 24	NC	No connect, leave open.
25	PLLLOCK	Phase-lock loop lock indicator or 1× clock output when PLL is disabled, high indicates PLL locked, maximum fanout less than 10 pF.
26	RESET	Internal divider reset input used to synchronize the internal clock when PLL is disabled.
27, 28	DIV1, DIV0	PLL prescaler divide ratio control pins.
29	CLK+	Noninverting differential clock input, biased to CLKVDD divided by two.
30	CLK−	Inverting differential clock input, biased to CLKVDD divided by two.
31	CLKCOM	Clock input common reference.
32	CLKVDD	Clock input supply voltage, 3.1 V to 3.5 V.
33	PLLCOM	Phase-lock loop common reference.
34	PLLVDD	Phase-lock loop supply voltage, 3.1 V to 3.5 V, connect to PLLCOM to disable the PLL clock multiplier.
35	LPF	PLL loop filter node, left open unless update rate is below 10 MSPS, where an external RC network is required.
36	SLEEP	Power-down control input, active high, connect to ACOM if unused.
37, 41, 44	ACOM	Analog common ground connection.
38	REFLO	Reference ground for internal 1.2 V reference, connect to AVDD to disable the internal reference.

AD9772AAST CAD Model

AD9772AAST Symbol

AD9772AAST Footprint

AD9772AAST 3D Model

Features of AD9772AAST

Fourteen Bit Digital to Analog Resolution

The AD9772AAST provides 14 bit resolution, allowing fine control over output signal levels. This resolution supports accurate representation of digitally generated waveforms when converted to analog form. It helps maintain smooth signal transitions and stable amplitude behavior in signal generation paths.

High Speed Sampling Capability up to 160 MSPS

The device supports a maximum sampling rate of 160 MSPS, enabling fast conversion of digital data streams. This sampling capability allows the AD9772AAST to handle wideband signals without loss of timing consistency. It is suitable for systems that require continuous high speed data conversion.

Dynamic Performance for Transmit Signal Paths

The converter is designed to deliver stable dynamic performance in transmit signal paths. It maintains consistent output behavior when processing rapidly changing digital inputs. This supports clean signal formation in communication and synthesis applications.

Single Supply Operating Structure

The AD9772AAST is optimized for single supply operation, simplifying power design at the system level. This structure reduces the need for multiple voltage rails. It supports straightforward integration into compact digital and mixed signal platforms.

Integrated High Speed CMOS DAC Architecture

The internal CMOS DAC structure supports fast switching and predictable output behavior. This architecture enables efficient digital to analog conversion while maintaining consistent signal timing. It supports stable operation across a wide range of data patterns.

Low Spurious Distortion Output Behavior

The device is designed to minimize spurious distortion during analog signal generation. This helps preserve waveform accuracy in communication related applications. Clean spectral behavior supports clearer signal reproduction.

Compact Surface Mount LQFP Package

The AD9772AAST is housed in a 48 lead LQFP package with a 7 x 7 mm footprint. This compact surface mount form supports space constrained designs. It allows easy placement on standard printed circuit boards.

TxDAC Plus Product Family Integration

As part of the TxDAC Plus series, the device aligns with a family of high speed digital to analog converters. This positioning supports consistent feature sets across related parts. It allows easier selection within similar signal generation designs.

AD9772AAST Technical Specifications

Product Attribute	Attribute Value
Manufacturer	Analog Devices, Inc.
Supplier Device Package	48-LQFP (7x7)
Series	TxDAC+®
Package / Case	48-LQFP
Package	Bag
Mounting Type	Surface Mount
Base Product Number	AD9772A
Moisture Sensitivity Level (MSL)	3 (168 Hours)
ECCN	EAR99
HTSUS	8542.39.0001

Functional Block Diagram of AD9772AAST

Presents the internal signal path and control architecture of the AD9772AAST digital to analog converter, detailing how 14 bit parallel input data passes through edge triggered latches, a 2× FIR interpolation filter, and a zero stuffing multiplexer before reaching the DAC core. Clock inputs feed a clock distribution network with selectable division and a PLL based clock multiplier supporting higher internal operating rates, while mode select and filter control logic manage configuration settings. The diagram also identifies the on chip 1.2 V reference and control amplifier, external reference adjustment pins, differential current outputs, and separate analog and digital power and ground domains, showing how timing, data processing, and biasing functions are integrated within the device.

Basic AC Characterization Test Setup of AD9772AAST

Defines a reference measurement configuration used to evaluate the ac performance of the AD9772AAST during laboratory testing. Digital data is supplied from a pattern generator or signal source and clocked into the device through differential clock inputs, with optional pulse generator control for reset and mode selection pins. The internal clock distribution, interpolation filter, and DAC stages operate under controlled supply voltages while the differential current outputs are routed through impedance matching networks and coupling components. The conditioned output signal is then connected to external test equipment such as a spectrum analyzer, allowing measurement of spectral purity, distortion, and noise characteristics under defined operating conditions.

Applications of AD9772AAST

Wireless Communication Transmitters

The AD9772AAST is used in wireless transmitter systems where digital data must be converted into stable analog signals before transmission. It supports high update rates that allow smooth handling of wideband modulation schemes. This makes it suitable for transmitter paths that require predictable output behavior and consistent signal shaping during continuous operation.

Direct Digital Synthesis Systems

In direct digital synthesis systems, the AD9772AAST converts numerically generated waveforms into analog signals with controlled resolution. It supports accurate waveform reproduction across a broad frequency range. This allows synthesis systems to maintain repeatable frequency and amplitude characteristics during signal generation tasks.

Signal Generators

The device is commonly applied in signal generators used for development, verification, and calibration work. It enables precise analog output derived from digital patterns. This helps signal generators produce clean and repeatable test signals across different operating conditions.

Test and Measurement Equipment

The AD9772AAST is integrated into test and measurement equipment that relies on controlled analog outputs for analysis and validation. Its conversion behavior supports stable signal levels over time. This consistency helps maintain reliable test results during repeated measurement cycles.

IF and Baseband Signal Processing

In intermediate frequency and baseband signal processing chains, the part converts processed digital data into analog form for further handling. It supports smooth signal transitions and stable output levels. This makes it suitable for systems that process complex digital data before analog conversion.

Broadband Communication Infrastructure

The AD9772AAST is used in broadband communication infrastructure where continuous high speed data streams must be converted to analog signals. It supports wideband operation required by modern communication standards. This allows infrastructure systems to maintain steady signal output during sustained data transmission.

Outline Dimensions of AD9772AAST

Defines the mechanical package dimensions for the 48 lead low profile quad flat package used by the AD9772AAST, with measurements provided in millimeters and aligned to JEDEC MS-026-BBC standards. The top view specifies the square body outline, pin 1 orientation, overall body size, and lead pitch, while side and sectional views show package height, seating plane, lead thickness, and coplanarity limits. Detailed callouts identify maximum and minimum tolerances for lead length and body dimensions, supporting accurate PCB footprint design, assembly alignment, and mechanical clearance verification.

AD9772AAST Advantages and Disadvantages

Advantages

• High sampling rate supports wideband signal generation

• 14 bit resolution balances speed with output accuracy

• TxDAC Plus architecture suited for transmit signal paths

• Compact LQFP package supports dense PCB layouts

• Stable behavior in IF and baseband signal generation

• Established use in communication and instrumentation systems

Disadvantages

• No integrated output amplifier

• Higher power use than lower speed DAC devices

• Single channel operation only

• Older design compared to newer DAC solutions

• Careful PCB layout needed for consistent high speed results

AD9772AAST Alternatives

Part Number	Manufacturer	Key Features	Use Case/Notes
AD9772AASTZ	Analog Devices Inc.	Precision TxDAC+® high-speed digital-to-analog converter with buffered output and surface mount LFBGA packaging.	Suitable for high-speed signal generation and modulation in communications and instrumentation.
AD9772AASTZRL	Analog Devices Inc.	TxDAC+® DAC in tape & reel packaging for automated assembly, offering consistent high speed performance.	Ideal for volume manufacturing in systems requiring reliable DAC integration.
AD9772AST	Analog Devices Inc.	Buffered output DAC with parallel LVDS interface and exposed pad package for optimized thermal performance.	Used in high-speed digital signal processing, test & measurement, and communications equipment.

About Analog Devices, Inc.

Analog Devices, Inc. is a global technology company focused on the design of analog, mixed signal, and digital signal processing components. The company serves a wide range of markets, including communications, industrial systems, automotive electronics, healthcare equipment, and instrumentation. Its product portfolio includes data converters, amplifiers, interface devices, sensors, and power management solutions used in complex electronic systems. The company is known for long product lifecycles, strong technical documentation, and a broad ecosystem that supports system level design. Its solutions are commonly used where accurate signal handling and stable operation are required.

Conclusion

The AD9772AAST stands out as a reliable 14-bit digital to analog converter built for high-speed signal generation. You get strong sampling performance, clean output behavior, and a design that works well in transmit, synthesis, and test systems. Its single-supply setup and compact LQFP package make integration more straightforward. The device also benefits from the TxDAC Plus architecture, helping maintain stable signal quality. While it doesn’t include an output amplifier, it delivers consistent results when paired with proper external circuitry. Overall, it’s a solid choice when you need fast and repeatable analog conversion.

Datasheet PDF

AD9772AAS Datasheet:

AD9772AAS.pdf