Datasheet ADA4960-1 (Analog Devices)

5 GHz, Low Distortion ADC Driver/Line Driver Data Sheet ADA4960-1 FEATURES FUNCTIONAL BLOCK DIAGRAM −3 dB bandwidth of 5 GHz (A = 6 dB) V Single resistor programmable gain: 0 dB to 18 dB VCC PD BIAS CELL VOCM Differential or single-ended input to differential output Low harmonic distortion (HD2/HD3 @ A = 6 dB) V VIP −88/−69 dBc @ 250 MHz −77/−66 dBc @ 500 MHz IIP VOP −73/−72 dBc @ 1 GHz RG IIN IMD3 @ 1 GHz = −63 dBc VON Slew rate 8700 V/µs (A = 6 dB, 2 V step) VIN V 6600 V/μs (A GND V = 18 dB, 2 V step) ADA4960-1
001
Fast settling: 1 ns to 1%, 1.4 ns to 0.1%
08458-
Fast overdrive recovery: 6.7 ns to 1%, 9.3 ns to 0.5%
Figure 1.
Single-supply operation: 5 V 1.2 AV = 6dB 0.1 dB gain flatness to 300 MHz 1.0 DC level translation 0.8 AV = 18dB AV = 12dB Available in 16-lead LFCSP 0.6 80% 0.4 APPLICATIONS 0.2 Differential ADC drivers for giga-sample ADCs (V) 0 A UT V (dB) SLEW RATE (V/µs) O GBPS line drivers with pre-emphasis 6 8700 V –0.2 12 7700 High speed data acquisition –0.4 18 6600 Electronic surveillance countermeasures –0.6 20% Pulse capture and conditioning –0.8 Oscilloscopes –1.0 Satellite communications –1.2 –0.2 0 0.2 0.4 0.6 0.8 1.0
047
Single-ended-to-differential converters TIME (ns)
08458-
RF/IF gain blocks
Figure 2. Rise Time, VOUT = 2 V p-p, TA = 25°C, For AV = 6 dB, AV = 12 dB, and AV = 18 dB
GENERAL DESCRIPTION
The ADA4960-1 is a high performance, differential amplifier The device is optimized for the best combination of slew rate, optimized for RF and IF applications. It achieves better than 63 dB bandwidth, and broadband distortion. These attributes al ow it IMD3 performance for frequencies up to and beyond 1 GHz, to drive a wide variety of ADCs. It is ideally suited for driving making it an ideal driver for 8-bit to 10-bit giga-sample analog- mixers, pin diode attenuators, SAW filters, and multi-element to-digital converters (ADCs). discrete devices. The buffered inputs of the ADA4960-1 isolate the gain-setting The user accessible gain adjust and bandwidth extension features resistor (RG) from the signal inputs, maintaining a constant 10 kΩ al ow configuration of the ADA4960-1 for line driver and input resistance, easing matching and input drive requirements. channel equalization applications. The ADA4960-1 has a nominal 150 Ω differential output impedance. The quiescent current of the ADA4960-1 is typical y 60 mA. When The ADA4960-1 is optimized for wideband, low distortion disabled, it consumes less than 3 mA, offering excellent input-to- performance for frequencies up to and beyond 1 GHz. These output isolation. attributes, together with its adjustable gain capability, make this Fabricated on an Analog Devices, Inc., high speed SiGe process, device the amplifier of choice for general-purpose IF and broad- the ADA4960-1 is available in a compact 3 mm × 3 mm, 16-lead band applications where low distortion, noise, and power are critical. LFCSP. It operates over the temperature range of −40°C to +85°C.
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Document Outline Features Applications Functional Block Diagram General Description Revision History Specifications Absolute Maximum Ratings Thermal Resistance Maximum Power Dissipation ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Test Circuits Circuit Description Basic Structure Applications Information Basic Connections Input and Output Interfacing Gain Adjust Bandwidth Extension ADC Interfacing Line Driver Applications Overdrive and Recovery Layout, Grounding, and Bypassing Outline Dimensions Ordering Guide