SA639DH/01,118 NXP

SA639 Low voltage mixer FM IF system with filter amplifier and data switch Rev. 4 10 July 2014 Product data sheet 1. General description The SA639 is a low-voltage high performance monolithic FM IF system with high-speed RSSI incorporating a mixer/oscillator, two wideband limiting intermediate frequency amplifiers, quadrature detector, logarithmic Received Signal Strength Indicator (RSSI), fast RSSI op amps, voltage regulator, wideband data output, post detection filter amplifier and data switch. The SA639 is available in 24-lead TSSOP (Thin Shrink Small Outline Package). The SA639 was designed for high-bandwidth portable communication applications and functions down to 2.7 V. The RF section is similar to the famous NE605. The data output provides a minimum bandwidth of 1 MHz to demodulate wideband data. The RSSI output is amplified and has access to the feedback pin. This enables the designer to level adjust the outputs or add filtering. The post-detection amplifier may be used to realize a low-pass filter function. A programmable data switch routes a portion of the data signal to an external integration circuit that generates a data comparator reference voltage. SA639 incorporates a Power-down mode which powers down the device when pin 8 (POWER DOWN CTRL) is HIGH. Power down logic levels are CMOS and TTL compatible with high input impedance. 2. Features and benefits V = 2.7 V to 5.5 V CC Low power consumption: 8.6 mA (typical) at 3 V Wideband data output (1 MHz minimum) Fast RSSI rise and fall times Mixer input to >500 MHz Mixer conversion power gain of 9.2 dB and noise figure of 11 dB at 110 MHz XTAL oscillator effective to 150 MHz (L.C. oscillator to 1 GHz local oscillator can be injected) 92 dB of IF amplifier/limiter power gain 25 MHz limiter small signal bandwidth Temperature compensated logarithmic Received Signal Strength Indicator (RSSI) with a dynamic range in excess of 80 dB RSSI output internal op amp Post detection amplifier for filtering Programmable data switchSA639 NXP Semiconductors Low voltage mixer FM IF system with filter amplifier and data switch Excellent sensitivity: 2.24 V into 50 matching network for 10 dB S/N (Signal-to-Noise ratio) with RF at 110 MHz and IF at 9.8 MHz ESD hardened Power-down mode 3. Applications DECT (Digital European Cordless Telephone) FSK and ASK data receivers 4. Ordering information Table 1. Ordering information Type number Topside Package mark Name Description Version SA639DH/01 SA639DH TSSOP24 plastic thin shrink small outline package 24 leads SOT355-1 body width 4.4 mm 4.1 Ordering options Table 2. Ordering options Type number Orderable Package Packing method Minimum Temperature part number order quantity SA639DH/01 SA639DH/01,112 TSSOP24 Standard marking 1575 T = 40 C to +85 C amb *ICs tube - DSC bulk pack SA639DH/01,118 TSSOP24 Reel 13 Q1/T1 2500 T = 40 C to +85 C amb *Standard mark SMD SA639 All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2014. All rights reserved. Product data sheet Rev. 4 10 July 2014 2 of 29