AD9627-11

Obsolete

11-Bit, 105 MSPS/150 MSPS, 1.8 V Dual Analog-to-Digital Converter

Data Sheet (Rev. B) Product Selection Table

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Overview

SNR = 65.8 dBc (66.8 dBFS) to 70 MHz @ 105 MSPS
SFDR = 85 dBc to 70 MHz @ 105 MSPS
Low power: 600 mW @ 105 MSPS
SNR = 65.7 dBc (66.7 dBFS) to 70 MHz @ 150 MSPS

SFDR = 84 dBc to 70 MHz @ 150 MSPS
Low power: 820 mW @ 150 MSPS
1.8 V analog supply operation
Please see data sheet for additional features.

The AD9627-11 is a dual, 11-bit, 105 MSPS/150 MSPS analog-to-digital converter (ADC). The AD9627-11 is designed to support communications applications where low cost, small size, and versatility are desired.

The dual ADC core features a multistage, differential pipelined architecture with integrated output error correction logic. Each ADC features wide bandwidth differential sample-and-hold analog input amplifiers supporting a variety of user-selectable input ranges. An integrated voltage reference eases design considerations. A duty cycle stabilizer is provided to compensate for variations in the ADC clock duty cycle, allowing the converters to maintain excellent performance.

The AD9627-11 has several functions that simplify the automatic gain control (AGC) function in the system receiver. The fast detect feature allows fast overrange detection by outputting four bits of input level information with very short latency.

In addition, the programmable threshold detector allows moni-toring of the incoming signal power using the four fast detect bits of the ADC with very low latency. If the input signal level exceeds the programmable threshold, the coarse upper threshold indicator goes high. Because this threshold indicator has very low latency, the user can quickly turn down the system gain to avoid an over-range condition.

The second AGC-related function is the signal monitor. This block allows the user to monitor the composite magnitude of the incoming signal, which aids in setting the gain to optimize the dynamic range of the overall system.

The ADC output data can be routed directly to the two external 11-bit output ports. These outputs can be set from 1.8 V to 3.3 V CMOS or 1.8 V LVDS.

Flexible power-down options allow significant power savings, when desired.

Programming for setup and control is accomplished using a 3-bit SPI-compatible serial interface.

The AD9627-11 is available in a 64-lead LFCSP and is specified over the industrial temperature range of −40°C to +85°C.

Product Highlights

Integrated dual, 11-bit, 105 MSPS/150 MSPS ADC
Fast overrange detect and signal monitor with serial output
Signal monitor block with dedicated serial output mode
Proprietary differential input that maintains excellent SNR performance for input frequencies up to 450 MHz
Operation from a single 1.8 V supply and a separate digital output driver supply to accommodate 1.8 V to 3.3 V logic families
Standard serial port interface (SPI) that supports various product features and functions, such as data formatting (offset binary, twos complement, or gray coding), enabling the clock DCS, power-down, test modes, and voltage reference mode
Pin compatibility with the AD9640, AD9627, and AD9600 for a simple migration from 11 bits to 14 bits, 12 bits, or 10 bits

Applications

Communications
Diversity radio systems
Multimode digital receivers (3G)
GSM, EDGE, WCDMA, CDMA2000, WiMAX, TD-SCDMA
I/Q demodulation systems
Smart antenna systems
General-purpose software radios
Broadband data applications

Documentation

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

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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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AD9627-11 IBIS Models 2

AD9627-11 (All Speed Grades) - 1.8V CMOS
AD9627-11 (All Speed Grades) - 1.8V LVDS

AD9627-11 Simulink ADIsimADC Model

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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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