Preliminary RECEIVER WITH RSSI 20-SSOP-225 KA8514 designed detect

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Preliminary RECEIVER WITH RSSI 20-SSOP-225 KA8514 designed detect

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KA8514
Preliminary RECEIVER WITH RSSI
20-SSOP-225 KA8514 designed detection pager set. includes voltage regulator, battery detection circuit, Mixer, Oscillator comprator limiting Amplifier. Also KA8514 provides RSSI function level monitoring.
FEATURES
Built-in RSSI function Supply Voltage 4.0V Consumption Current 1.2mA (typ) Battery Detection Circuit alarm function 1.05V Voltage Regulator Vreg 1.0V (typ) Mixer Operating Frequency 50MHz High Transmitting Rate 1200bps Data Reception Package Type ssop (0.65mm)
ORDERING INFORMATION
Device KA8514D Product Package 20-SSOP-225 Operating Temperature 70°C
BLOCK DIGRAM
REGO
REGC
FSKO
LPFO
LPFI
1.0V Regulator
2`nd
COMP.
Quick Charge Filter
Alarm
X-tal
Limiting Amplifier
Quad Detector
RSSI
OSCI
OSCO
FSKI
RSSI
KA8514
CONFIGURATION
Preliminary RECEIVER WITH RSSI
OSCI OSCO FSKI RSSI
REGO REGC FSKO LPFO LPFI
KA8514D
DESCRIPTION
Symbol OSCI OSCO Oscillator input oscillator internally biased colpitts type Oscillator output Mixer output Output impedance Connect 455KHz filter between this limiter amplifier input Input impedance Bypass capacitor connect limiter amplifier Description
KA8514
Preliminary RECEIVER WITH RSSI
Symbol FSKI RSSI
Description Differential Reference input comparator. Quadrature detection phase shifter pin. Recovered audio signal output. Output RSSI. This detects level monitoring limiter amplifier Pass filter amplifier input. Bias supplied from pass filter amplifier output. Battery saving control pin.
LPFI LPFO
High Battery saving off. Battery saving Quick charge control pin.
High Quick charge discharge Quick charge discharge off.
FSKO
signal output pin. Alarm output. This become High' when drops belows 1.05V. External Transtor control pin. Connect External Transistor. Regulated Voltage output Ground Mixer input impedance
REGC REGO
ABSOLUTE MAXIMUM RATINGS
Characteristic Max. Supply Voltage Power Dissipation Operating Temperature Storage Temperature Symbol (Max) Value Unit
KA8514
ELECTRICAL CHARACTERISTICS
Preliminary RECEIVER WITH RSSI
(VCC 1.4V (2MIX) 21.4MHz, fDEV 4KHz, fMOD 600Hz, 25°C, Unless otherwise specified Parameter Operating current Symbol ICCN ICCS Alarm detection voltage Alarm level output voltage Alarm high level leakage current level output voltage high level leakage current Regulator output voltage Quick charge current Input -3dB sensitivity Input -12dB SINAD sensitivity Recovered audio output voltage Mixer conversion voltage gain Signal noise ratio Total Harmonic Distortion Mixer order intercept point Mixer input resistance Limiting amplifier input resistance rejection ratio Data shapping output duty ratio RSSI output voltage RSSI output resistance (AL) ILKG (AL) (FSK) ILKG (FSK) VOREG VLIM (SEN) (RAD) (MIX) (LA) VRSSI RRSSI Conditions Input Signal Battery Saving 100µA 100µA Mixer Input Input (2MIX) µVrms Ceramic Filter loss -1dB VIN(2MIX) 5µVrms 30%) (2MIX) 500µVrms VIN(2MIX) µVrms 30%) 0.95 0.49 1.05 1.05 18.0 0.91 Unit µVrms µVrms µVrms
KA8514
APPLICATION CIRCUIT
Alarm Reg.out Input 2.2µ 100P 100K 100K
Preliminary RECEIVER WITH RSSI
0.01µ 3.3n
REGO
REGC
FSKO
LPFO
LPFI 560P
1.0V Regulator
2'nd
COMP.
Quick Charge Filter Alarm
X-tal
Limiting Amplifier
Quad Detector
RSSI
OSCI
OSCO
FSKI
RSSI
20.945MHz
0.1µ
3.3K

Preliminary RECEIVER WITH RSSI 20-SSOP-225 KA8514 designed detect

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