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LTC221CJ Datasheet(PDF) 5 Page - Linear Technology |
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LTC221CJ Datasheet(HTML) 5 Page - Linear Technology |
5 / 12 page LTC221/LTC222 5 2212fa Switching Time Test Circuit Switch output waveform shown for VS = constant with logic input waveform as shown. Note that VS may be (+) or (–) as per switching time test circuit. VO is the steady APPLICATIO S I FOR ATIO state output switch on. Feedthrough via gate capacitance may result in spikes at leading and trailing edge of output waveform. CCRR-Channel to Channel Crosstalk Test Circuit Switching Time Test Circuit Charge Injection Test Circuit OIRR-Off Isolation Test Circuit LTC221/222 • AI01 VS OV OV OV 3V 3V LTC222 LOGIC INPUT tr < 20ns tr < 20ns LTC221 LOGIC INPUT tr < 20ns tr < 20ns SWITCH INPUT SWITCH OUTPUT 50% 50% VO 0.9 0.9 LOGIC "0" = SW ON LOGIC "1" = SW ON VO tON tOFF LTC221/222 • AI02 S1 D1 (REPEAT TEST FOR IN2, IN3 AND IN4) VO CL 35pF RL 1k RL RL+ RDS(ON) VO = VS IN1 SWITCH OUTPUT SWITCH INPUT LOGIC INPUT VS = 2V LTC221/222 • AI03 SX RGEN VGEN DX INX VO CL = 1000pF LTC221/222 • AI04 OV OV 3V 3V VO LTC221 INX LTC222 INX ∆VO ∆VO IS THE MEASURED VOLTAGE ERROR DUE TO CHARGE INJECTION. THE ERROR VOLTAGE IN COULOMBS IS ∆Q = VL • ∆VO OFF OFF ON ON ON ON LTC221/222 • AI05 VS V+ V– C OIRR = 20 LOG C = 0.001µF//0.1µF CHIP CAPACITORS SIGNAL GENERATOR C 15V –15V VD GND VIN INX VS VD RL 1k VS = 2VP-P f = 100kHz CHAN A ANALYZER CHAN B LTC221/222 • AI06 VS1 V + V– C OIRR = 20 LOG C = 0.001µF//0.1µF CHIP CAPACITORS SIGNAL GENERATOR C NC 50Ω 15V –15V VD2 VS2 VD1 VL GND VIN VIN IN2 IN1 VS1 VD2 RL 1k VS = 2Vp-p f = 100kHz CHAN A ANALYZER CHAN B |
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