ADA4960-1

The ADA4960-1 is optimized for wideband, low distortion performance for frequencies up to and beyond 1 GHz. These attributes, together with its adjustable gain capability, make this device the amplifier of choice for general-purpose IF and broad- band applications where low distortion, noise, and power are critical. The user accessible gain adjust and bandwidth extension features allow configuration of the ADA4960-1 for line driver and channel equalization applications. The quiescent current of the ADA4960-1 is typically 60 mA. When disabled, it consumes less than 3 mA, offering excellent input-to- output isolation. Fabricated on an Analog Devices, Inc., high speed SiGe process, the ADA4960-1 is available in a compact 3 mm * 3 mm, 16-lead LFCSP. It operates over the temperature range of -40°C to +85°C. The device is optimized for the best combination of slew rate, bandwidth, and broadband distortion. These attributes allow it to drive a wide variety of ADCs. It is ideally suited for driving mixers, pin diode attenuators, SAW filters, and multi-element discrete devices. The ADA4960-1 is a high performance, differential amplifier optimized for RF and IF applications. It achieves better than 63 dB IMD3 performance for frequencies up to and beyond 1 GHz, making it an ideal driver for 8-bit to 10-bit giga-sample analog- to-digital converters (ADCs). The buffered inputs of the ADA4960-1 isolate the gain-setting resistor (RG)from the signal inputs, maintaining a constant 10 k input resistance, easing matching and input drive requirements. The ADA4960-1 has a nominal 150 differential output impedance.

The features of ADA4960-1 can be summarized as (1)-3 dB bandwidth of 5 GHz (AV = 6 dB); (2)single resistor programmable gain: 0 dB to 18 dB; (3)differential or single-ended input to differential output; (4)low harmonic distortion (HD2/HD3 @ AV = 6 dB)-88/-69 dBc @ 250 MHz/ -77/-66 dBc @ 500 MHz/ -73/-72 dBc @ 1 GHz; (5)IMD3 @ 1 GHz = -63 dBc; (6)slew rate 8700 V/s (AV = 6 dB, 2 V step)/ 6600 V/s (AV = 18 dB, 2 V step); (7)fast settling: 1 ns to 1%, 1.4 ns to 0.1%; (8)fast overdrive recovery: 6.7 ns to 1%, 9.3 ns to 0.5%; (9)single-supply operation: 5 V; (10)0.1 dB gain flatness to 300 MHz; (11)DC level translation; (12)available in 16-lead LFCSP.

The absolute maximum ratings of ADA4960-1 are (1)supply voltage, VCC: 5.25 V; (2)VIP, VIN: VCC + 0.5 V; (3)internal power dissipation: See Figure 3; (4)maximum junction temperature: 150°C; (5)operating temperature range: -40°C to +85°C; (6)storage temperature range: -65°C to +150°C.