Philips SA614A
The SA614A is an improved monolithic low-power FM IF system incorporating two limiting intermediate frequency amplifiers, quadrature detector, muting, logarithmic received signal strength indicator, and voltage regulator. The SA614A features higher IF bandwidth (25MHz) and temperature compensated RSSI and limiters permitting higher performance application compared with the SA604. The SA614A is available in a 16-lead dual-in-line plastic and 16-lead SO (surface-mounted miniature) package.DESCRIPTION
PIN CONFIGURATION D and N Packages IF AMP DECOUPLING 1 GND 2 MUTE INPUT 3 VCC 4 16 IF AMP INPUT 15 IF AMP DECOUPLING 14 IF AMP OUTPUT 13 GND 12 LIMITER INPUT 11 LIMITER DECOUPLING 10 LIMITER DECOUPLING 9 LIMITER RSSI OUTPUT 5 MUTE AUDIO OUTPUT 6FEATURES
● Low power consumption: 3.3mA typical● Temperature compensated logarithmic Received Signal Strength Indicator (RSSI) with a dynamic range in excess of 90dB UNMUTE AUDIO OUTPUT 7 QUADRATURE INPUT 8 SR00323
● Two audio outputs - muted and unmuted
● Low external component count; suitable for crystal/ceramic filters
● Excellent sensitivity: 1.5µV across input pins (0.22µV into 50Ω matching network) for 12dB SINAD (Signal to Noise and Distortion ratio) at 455kHz Figure 1. Pin Configuration
APPLICATIONS
● SA614A meets cellular radio specifications● Cellular radio FM IF
● High performance communications receivers
● Intermediate frequency amplification and detection up to 25MHz
● RF level meter
● Spectrum analyzer
● Instrumentat...