AD9645

RECOMMENDED FOR NEW DESIGNS

Dual, 14-Bit, 80 MSPS/125 MSPS Serial LVDS 1.8 V Analog-to-Digital Converter

Data Sheet (Rev. C) Product Selection Table

Part Models: 6
1ku List Price: Starting From $35.94

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Overview

1.8 V supply operation
Low power: 122 mW per channel at 125 MSPS with scalable power options
SNR = 74 dBFS (to Nyquist); SFDR = 91 dBc at 70 MHz
DNL = ±0.65 LSB (typical); INL = ±1.5 LSB (typical)
Serial LVDS (ANSI-644, default) and low power, reduced range option (similar to IEEE 1596.3)
650 MHz full power analog bandwidth
2 V p-p input voltage range

Serial port control
- Full chip and individual channel power-down modes
- Flexible bit orientation
- Built-in and custom digital test pattern generation
- Clock divider
- Programmable output clock and data alignment
- Programmable output resolution
- Standby mode
AEC-Q100 qualified for automotive applications

The AD9645 is a dual, 14-bit, 80 MSPS/125 MSPS analog-to-digital-converter (ADC) with an on-chip sample-and-hold circuit designed for low cost, low power, small size, and ease of use. The product operates at a conversion rate of up to 125 MSPS and is optimized for outstanding dynamic performance and low power in applications where a small package size is critical.

The ADC requires a single 1.8 V power supply and LVPECL-/CMOS-/LVDS-compatible sample rate clock for full performance operation. No external reference or driver components are required for many applications.

The ADC automatically multiplies the sample rate clock for the appropriate LVDS serial data rate. A data clock output (DCO) for capturing data on the output and a frame clock output (FCO) for signaling a new output byte are provided. Individual channel power-down is supported; the AD9645 typically consumes less than 2 mW in the full power-down state. The ADC provides several features designed to maximize flexibility and minimize system cost, such as programmable output clock and data alignment and digital test pattern generation. The available digital test patterns include built-in deterministic and pseudo-random patterns, along with custom user-defined test patterns entered via the serial port interface (SPI).

The AD9645 is available in a RoHS-compliant, 32-lead LFCSP. It is specified over the automotive temperature range of −40°C to +105°C.

PRODUCT HIGHLIGHTS

Small Footprint. Two ADCs are contained in a small, space-saving package.
Low Power. The AD9645 uses 122 mW/channel at 125 MSPS with scalable power options.
Pin Compatibility with the AD9635, a 12-Bit Dual ADC.
Ease of Use. A data clock output (DCO) operates at frequencies of up to 500 MHz and supports double data rate (DDR) operation.
User Flexibility. The SPI control offers a wide range of flexible features to meet specific system requirements.

APPLICATIONS

Communications
Diversity radio systems
Multimode digital receivers
GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, TD-SCDMA
I/Q demodulation systems
Smart antenna systems
Broadband data applications
Battery-powered instruments
Hand held scope meters
Portable medical imaging and ultrasound
Radar/LIDAR

Part Models: 6
1ku List Price: Starting From $35.94

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
AD9645BCPZ-125	32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
AD9645BCPZ-80	32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
AD9645BCPZRL7-125	32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
AD9645BCPZRL7-80	32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
AD9645WBCPZ-80	32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
AD9645WBCPZRL7-80	32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 1, 2024 - 24_0009 Qualification of alternative Wafer Fab for TSMC 0.18um Mixed Signal CMOS Process
		PCN24_0009_Form Material_Report Qualification Results Summary
AD9645BCPZ-125	PRODUCTION
AD9645BCPZ-80	PRODUCTION
AD9645BCPZRL7-125	PRODUCTION
AD9645BCPZRL7-80	PRODUCTION
May 11, 2014 - 13_0231 Assembly Transfer of Select 4x4 and 5x5mm LFCSP Products to STATS ChipPAC China.
		PCN13_0231_Form Material_Report Detailed Change Description Qualification Report Summary
AD9645BCPZ-125	PRODUCTION
AD9645BCPZ-80	PRODUCTION
AD9645BCPZRL7-125	PRODUCTION
AD9645BCPZRL7-80	PRODUCTION
Sep 15, 2025 - 24_0009 Qualification of Alternative Wafer Fab for TSMC 0.18um Mixed Signal CMOS Process
		PCN24_0009_Form Material_Report Delta Qualification Matrix Qualification Results Summary
AD9645WBCPZ-80	PRODUCTION
AD9645WBCPZRL7-80	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Clock ICs 9
AD9510	RECOMMENDED FOR NEW DESIGNS	1.2 GHz Clock Distribution IC, PLL Core, Dividers, Delay Adjust, Eight Outputs
AD9511	RECOMMENDED FOR NEW DESIGNS	1.2 GHz Clock Distribution IC, PLL Core, Dividers, Delay Adjust, Five Outputs
AD9512	RECOMMENDED FOR NEW DESIGNS	1.2 GHz Clock Distribution IC, Two 1.6 GHz Inputs, Dividers, Delay Adjust, Five Outputs
AD9513	RECOMMENDED FOR NEW DESIGNS	800 MHz Clock Distribution IC, Dividers, Delay Adjust, Three Outputs

AD9514	RECOMMENDED FOR NEW DESIGNS	1.6 GHz Clock Distribution IC, Dividers, Delay Adjust, Three Outputs
AD9515	RECOMMENDED FOR NEW DESIGNS	1.6 GHz Clock Distribution IC, Dividers, Delay Adjust, Two Outputs
AD9523	NOT RECOMMENDED FOR NEW DESIGNS	14-Output, Low Jitter Clock generator
AD9523-1	RECOMMENDED FOR NEW DESIGNS	Low Jitter Clock Generator with 14 LVPECL/LVDS/HSTL/29 LVCMOS Outputs
AD9524	NOT RECOMMENDED FOR NEW DESIGNS	6 Output, Dual Loop Clock Generator
Differential Amplifiers 3
ADA4927-2	RECOMMENDED FOR NEW DESIGNS	Ultralow Distortion Current Feedback Differential ADC Driver
ADA4938-2	RECOMMENDED FOR NEW DESIGNS	Ultralow Distortion Differential ADC Driver (Dual)
ADL5562	RECOMMENDED FOR NEW DESIGNS	3.3 GHz Ultralow Distortion RF/IF Differential Amplifier
Variable Gain Amplifiers (VGA) 2
ADL5202	Obsolete	Wide Dynamic Range, High Speed, Digitally Controlled VGA
AD8376	RECOMMENDED FOR NEW DESIGNS	Ultralow Distortion IF Dual VGA

Tools & Simulations

Virtual Eval - BETA

Virtual Eval is a web application to assist designers in product evaluation of ADCs, DACs, and other ADI products. Using detailed models on Analog’s servers, Virtual Eval simulates crucial part performance characteristics within seconds. Configure operating conditions such as input tones and external jitter, as well as device features like gain or digital down-conversion. Performance characteristics include noise, distortion, and resolution, FFTs, timing diagrams, response plots, and more.

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AD9645 IBIS Model 1

AD9645BCPZ

Visual Analog

For designers who are selecting or evaluating high speed ADCs, VisualAnalog™ is a software package that combines a powerful set of simulation and data analysis tools with a user-friendly graphical interface.

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S-Parameter 1

AD9645 S-Parameters

AD9645 Simulink ADIsimADC Model

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Evaluation Kits

AD9645 Evaluation Board

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Product Details

The AD9645-125EBZ is an evaluation board for the AD9645, dual 14-bit ADC. This reference design provides all of the support circuitry required to operate the devices in their various modes and configurations. It is designed to interface directly with the HSC-ADC-EVALC data capture card, allowing users to download captured data for analysis. The Visual Analog software package, which is used to interface with the device's hardware, allows users to download captured data for analysis with a user-friendly graphical interface. The SPI Controller software package is also compatible with this hardware, and allows the user to access the SPI programmable features of the AD9645.

The AD9645 data sheet provides additional information related to device configuration and performance, and should be consulted when using these tools. All documents and Visual Analog and SPI Controller are available at the High Speed ADC Evaluation Boards page. For additional information or questions, please email highspeed.converters@analog.com.