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AIC1841 Dataheets PDF



Part Number AIC1841
Manufacturers Analog Intergrations Corporation
Logo Analog Intergrations Corporation
Description REGULATED GaAsFET BIAS
Datasheet AIC1841 DatasheetAIC1841 Datasheet (PDF)

PRELIMINARY AIC1840/1841 LOW-NOISE, REGULATED GaAsFET BIAS SPEC NO: DS-1840-P2 ! FEATURES " Low Output Noise: 2mV Ripple. " Work with Small Capacitors (as Low as 0.22µF). " Fixed -2V or Adjustable Output. " 2.5V to 6.5V Input Voltage Range. " Switching Frequency: 104KHz in Normal Operation. " 1µA Maximum in Shutdown Mode. ! APPLICATIONS " Cellular Phones. " GaAsFET Power Amplifier Modules. " Personal Communicators and PDAs. " Wireless Data Loggers. " LCD Bias Contrast Control. " Regulated Nega.

  AIC1841   AIC1841



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PRELIMINARY AIC1840/1841 LOW-NOISE, REGULATED GaAsFET BIAS SPEC NO: DS-1840-P2 ! FEATURES " Low Output Noise: 2mV Ripple. " Work with Small Capacitors (as Low as 0.22µF). " Fixed -2V or Adjustable Output. " 2.5V to 6.5V Input Voltage Range. " Switching Frequency: 104KHz in Normal Operation. " 1µA Maximum in Shutdown Mode. ! APPLICATIONS " Cellular Phones. " GaAsFET Power Amplifier Modules. " Personal Communicators and PDAs. " Wireless Data Loggers. " LCD Bias Contrast Control. " Regulated Negative Power Supplies. ! DESCRIPTION The AIC1840/1841 is a switched-capacitor voltage inverter that generates a regulated fixed -2.0V or externally adjustable output. An internal linear post-regulator reduces the output voltage ripple to less than 2mV, making the AIC1840/1841 excellent for use as bias voltage generator for transmitter GaAsFETs in portable RF and cellular telephone applications. The operation voltage is as low as 2.5V. The AIC1840/1841 offers a -2V preset output as well as a -1.3V to -3.0V adjustable output. Input voltage range for AIC1840/1841 is 2.5V to 6.5V. Output current is 5mA at VOUT= -2V and with VIN≥2.5V. Quiescent current is 510µA at VIN=3.6V and reduces to less than 1µA in shutdown mode (3µA max. for the AIC1841). ! TYPICAL APPLICATION CIRCUIT The AIC1840 has an active-low shutdown input, while the AIC1841 has an active-high shutdown input. VBAT (+2.5 ~ +6.5V) VTX C3 3.3µF + C8 L1 C9 RF INPUT 8 RF POWER AMPLIFIER L2 T1 C1 3.3µF + 1 2 VDD CAPP VOUT 6 VOUT(VGS)= -2.0V CAPN C4 3 AIC1841 3.3µF + C5 C2 3.3µF VNN 5 4 FB SHDN GND + 7 VSHDN R1 C6 C7 T2 C11 C10 RF OUTPUT Bias Generator for GaAsFET Power Amplifier ! ORDERING INFORMATION AIC1840 XX AIC1841 XX PACKAGE TYPE N: PLASTIC DIP S: SMALL OUTLINE TEMPERATURE RANGE C: 0°C~+70°C ORDER NUMBER AIC1840CN AIC1841CN (PLASTIC DIP) AIC1840CS AIC1841CS (PLASTIC SO) PIN CONFIGURATION TOP VIEW CAPP 1 CAPN 2 VNN 3 SHDN 4 (AIC1840) *SHDN (AIC1841) 8 VDD 7 GND 6 VOUT 5 FB ANALOG INTEGRATIONS CORPORATION www.analog.com.tw 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. TEL: (8863)577-2500 FAX:(8863)577-2510 1 AIC1840/1841 LOW-NOISE, REGULATED GaAsFET BIAS SPEC NO: DS-1840-P2 ! ABSOLUTE MAXIMUM RATINGS Supply Voltage ......................................................……………..................…............. 7V Operating Temperature Range ....................................………...................... -25°C~80°C Storage Temperature Range ...............................……………...................... -65°C~150°C ! TEST CIRCUIT VIN 1 CAPP + 1µF C1 2 CAPN 8 VDD + 7 GND 1µF C3 VIN 1µF + C2 AIC1840/1841 3 VNN 6 VOUT C4 10µF 4 SHDN SHDN FB 5 + VOUT=-2V RL ! ELECTRICAL CHARACTERISTICS (VIN=3.6V, Ta=25°C, unless otherwise specified.) PARAMETER Supply Voltage Range Output Voltage Output Voltage Adjustment Range Set Voltage Supply Current Shutdown Mode Current Output Load Regulation Output Ripple Oscillator Frequency Shu.


AIC1840 AIC1841 AIAC-1008C-6N8


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