The ADA4960-1 is a high performance differential amplifier optimized for RF and IF applications. It achieves better than 63dB SFDR performance at frequencies up to 500 MHz, and 52dB up to 1GHz, making it an ideal driver for high speed 8-bit to 10-bit giga-sample analog-to-digital converters (ADCs).
Unlike other wideband differential amplifiers, the ADA4960-1 has buffered inputs that isolate the gain-setting resistor (RG) from the signal inputs. As a result, the ADA4960-1 maintains a constant 10 kΩ differential input resistance for gains of 6 dB to 15 dB, easing matching and input drive requirements. The ADA4960-1 has a nominal 150 Ω differential output resistance.
The device is optimized for wideband, low distortion performance at frequencies up to and beyond 1 GHz. These attributes, together with its wide gain adjust capability make this device the amplifier of choice for general-purpose IF and broadband applications where low distortion, noise, and power are critical.
The device also includes a unity gain buffer, for the buffering of DC signals such as the common-mode-input to the amplifier. This buffer is found between pins 6 (input) and pin5 (output). If this buffer is not used, the output can be left disconnected and the input can be grounded.
It is ideally suited for driving not only ADCs, but also mixers, pin diode attenuators, SAW filters, and multi-element discrete devices, as well as buffering high frequency DACs. The device is available in a single channel version in 3mm x 3mm, 16-lead LFCSP package. The device operates over a temperature range of -40C to +85C.
|Title||Content Type||File Type|
|ADA4960-1: Low Distortion Ultrahigh Speed Differential ADC Driver Preliminary Data Sheet (Rev 0, 04/2010) (pdf, 109 kB)||Data Sheets|
|AN-1026: High Speed Differential ADC Driver Design Considerations (pdf, 355 kB)||Application Notes|
|CN-0238: High Performance, 12-Bit, 500 MSPS Wideband Receiver with Antialiasing Filter (pdf, 199 kB)||Circuit Note|
|MT-218: Multiple Feedback Band-Pass Design Example (pdf, 0)||Tutorials|
A Stress-Free Method for Choosing High-Speed Op Amps
A decision-tree approach to making the critical decision about high-speed op amp selection, including a look at some helpful tools.
|High-speed 8-bit A/D Converters Deliver Best-in-Class Power and Noise Performance (31 Jan 2011)||Press Releases||HTML|
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|Test & Instrumentation Solutions Bulletin, Volume 10, Issue 3 (pdf, 1334 kB)||Solutions Bulletins|
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|Glossary of EE Terms||Glossary||HTML|
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|ADA4960 SPICE Macro Model||SPICE Models||HTML|
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