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636B Datasheet

Part NameDescriptionManufacturer
636B Low voltage high performance mixer FM IF system with high-speed RSSI NXP
NXP Semiconductors. NXP
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General description
The SA636 is a low-voltage high performance monolithic FM IF system with high-speed RSSI incorporating a mixer/oscillator, two limiting intermediate frequency amplifiers, quadrature detector, logarithmic Received Signal Strength Indicator (RSSI), voltage regulator, wideband data output and fast RSSI op amps. The SA636 is available in 20-lead SSOP (Shrink Small Outline Package) and HVQFN20 (quad flat package).

Features and benefits
■ Wideband data output (600 kHz minimum)
■ Fast RSSI rise and fall times
■ Low power consumption: 6.5 mA typical at 3 V
■ Mixer input to >500 MHz
■ Mixer conversion power gain of 11 dB at 240 MHz
■ Mixer noise figure of 12 dB at 240 MHz
■ XTAL oscillator effective to 150 MHz (LC oscillator to 1 GHz local oscillator can be
   injected)
■ 92 dB of IF amp/limiter gain
■ 25 MHz limiter small signal bandwidth
■ Temperature compensated logarithmic Received Signal Strength Indicator (RSSI) with
   a dynamic range in excess of 90 dB
■ RSSI output internal op amp
■ Internal op amps with rail-to-rail outputs
■ Low external component count; suitable for crystal/ceramic/LC filters
■ Excellent sensitivity: 0.54 μV into 50Ω  matching network for 12 dB SINAD  (Signal-to-Noise And Distortion ratio) for 1 kHz tone with RF at 240 MHz and IF at 10.7 MHz
■ 10.7 MHz filter matching (330 Ω)
■ Power-down mode (ICC = 200 μA)
■ ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101
■ Latch-up testing is done to JEDEC Standard JESD78 Class II, Level B

Applications
■ DECT (Digital European Cordless Telephone)
■ Digital cordless telephones
■ Digital cellular telephones
■ Portable high performance communications receivers
■ Single conversion VHF/UHF receivers
■ FSK and ASK data receivers
■ Wireless LANs

 

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