To drive this ADC in DC-coupled applications, we suggest ADA4937-1 or ADA4938-1. To drive this ADC in AC-coupled applications, we suggest AD8352. To drive this ADC with an IF VGA, we suggest AD8376 or AD8372.

The AD9627 is a dual, 12-bit, 80 MSPS/105 MSPS/125 MSPS/ 150 MSPS analog-to-digital converter (ADC). The AD9627 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 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 monitoring 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 overrange 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 12-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 is available in a 64-lead LFCSP and is specified over the industrial temperature range of −40°C to +85°C.

Product Highlights

1. Integrated dual, 12-bit, 80 MSPS/105 MSPS/125 MSPS/ 150 MSPS ADC.
2. Fast overrange detect and signal monitor with serial output.
3. Signal monitor block with dedicated serial output mode.
4. Proprietary differential input that maintains excellent SNR performance for input frequencies up to 450 MHz.
5. 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.
6. 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.
7. Pin compatibility with the AD9640, AD9627-11, and AD9600 for a simple migration from 12 bits to 14 bits, 11 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

Data Sheet, Rev. 0, 10/07

Part#	Res	Throughput Rate	# of Inputs	Operating Pwr Diss
AD9627-150	12	150MSPS	2	890mW
AD9626-250	12	250MSPS	1	390mW
AD9230-250	12	250MSPS	1	463mW
AD9230-170	12	170MSPS	1	407mW
AD9626-170	12	170MSPS	1	291mW
AD9600-150	10	150MSPS	2	890mW
AD9627-80	12	80MSPS	2	490mW
AD9238-65	12	65MSPS	2	698mW
AD9238-20	12	20MSPS	2	212mW
AD7922	12	1MSPS	2	15mW
AD7366-5	12	500KSPS	2	54.5mW

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For detailed drawings and chemical composition please consult our  Package Site

Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

This is the acceptable operating range of the device. The various ranges specified are as follows:

• Commercial: 0 to +70 degrees Celsius
• Military : -55 to +125 degrees Celsius
• Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
• Automotive: -40 to +125 degrees Celsius

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