Datasheet LT6402-20 (Analog Devices)

LT6402-20 300MHz Low Distortion, Low Noise Differential Amplifi er/ ADC Driver (AV = 20dB)
U FEATURES DESCRIPTIO
■ 300 MHz –3dB Bandwidth The LT®6402-20 is a low distortion, low noise differential ■ Fixed Gain of 20dB amplifi er/ADC driver for use in applications from DC to ■ Low Distortion: 300MHz. The LT6402-20 has been designed for ease of 51dBm OIP3, –81dBc HD3 (20MHz, 2V use, with minimal support circuitry required. Exceptionally P-P) ■ Low Noise: low input-referred noise and low distortion (with either 12.4dB NF, e single-ended or differential inputs) make the LT6402-20 n = 1.9nV/√Hz (20MHz) ■ Differential Inputs and Outputs an excellent solution for driving high speed 12-bit and ■ Additional Filtered Outputs 14-bit ADCs. In addition to the normal unfi ltered outputs ■ Adjustable Output Common Mode Voltage (+OUT and –OUT), the LT6402-20 has a built-in 75MHz ■ DC- or AC-Coupled Operation differential low pass fi lter and an additional pair of fi ltered ■ Minimal Support Circuitry Required outputs (+OUTFILTERED, –OUTFILTERED) to reduce ■ Small 0.75mm Profi le 16-Lead 3mm × 3mm QFN external fi ltering components when driving high speed Package ADCs. The output common mode voltage is easily set via the V
U
OCM pin, eliminating an output transformer or AC-
APPLICATIO S
coupling capacitors in many applications. ■ The LT6402-20 is designed to meet the demanding require- Differential ADC Driver for: ments of communications transceiver applications. It can Imaging be used as a differential ADC driver, a general-purpose Communications ■ differential gain block, or in other applications requiring Differential Driver/Receiver ■ differential drive. The LT6402-20 can be used in data Single Ended to Differential Conversion ■ acquisition systems required to function at frequencies Differential to Single Ended Conversion ■ down to DC. Level Shifting ■ IF Sampling Receivers The LT6402-20 operates on a 5V supply and consumes ■ SAW Filter Interfacing/Buffering 30mA. It comes in a compact 16-lead 3mm × 3mm QFN pack- , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. age and operates over a –40°C to 85°C temperature range. All other trademarks are the property of their respective owners.
U TYPICAL APPLICATIO Distortion vs Frequency, Differential Input, No RLOAD
–40 FILTERED OUTPUTS 5V VOUT = 2VP-P –50 0.1µF 0.1µF –60 –INB VCC –INA V –70 V CM OCM 10Ω 0.1µF +OUT AIN+ HD3 LT6402-20 –80 10Ω LTC®2249 DISTORTION (dBc) 0.1µF –OUT AIN– +INB –90 IF IN VEE HD2 +INA –100 6402 TA01a 1 10 100 FREQUENCY (MHz) 64022 G08 640220fa 1