Datasheet LTC201A, LTC202, LTC203 (Analog Devices) - 6
| Fabricante | Analog Devices |
| Descripción | Micropower, Low Charge Injection, Quad CMOS Analog Switches |
| Páginas / Página | 16 / 6 — APPLICATIO S I FOR ATIO. Switching Time Test Circuit. Charge Injection … |
| Revisión | LTC201A/LTC202/LTC203: Micropower, Low Charge Injection, Quad CMOS Analog Switches Data Sheet |
| Formato / tamaño de archivo | PDF / 208 Kb |
| Idioma del documento | Inglés |
APPLICATIO S I FOR ATIO. Switching Time Test Circuit. Charge Injection Test Circuit
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LTC201A/LTC202/LTC203
U U W U APPLICATIO S I FOR ATIO Switching Time Test Circuit
output switch on. Feedthrough via gate capacitance may result in spikes at leading and trailing edge of output Switch output waveform shown for VS = constant with waveform. logic input waveform as shown. Note that VS may be + or – as per switching time test circuit. VO is the steady state
Switching Time Test Circuit
LOGIC “1” = SW ON SWITCH SWITCH INPUT NO 3V OUTPUT S1 D1 LOGIC INPUT 50% VS = 2V VO tr < 20ns 0V R C t L R L L f < 20ns V 1k = V Ω 35pF O IN1 S R + r LOGIC “0” = SW ON L DS(ON) NC 3V LOGIC LOGIC INPUT INPUT 50% tr < 20ns 0V t (REPEAT TEST FOR IN2, IN3 AND IN4) f < 20ns SWITCH VS INPUT LT201_202_203 • AI02 V 0.9 0.9 O VO SWITCH 0V OUTPUT tON tOFF LT201_202_203 • AI01
Charge Injection Test Circuit
∆ VO RGEN SX DX VO C V L = GEN 1000pF INX VO 3V OFF NC LT201_202_203 • AI03 ON ON 0V ON ON 3V NO OFF 0V ∆ VO IS THE MEASURED VOLTAGE ERROR DUE TO CHARGE INJECTION. THE ERROR VOLTAGE IN COULOMBS IS ∆Q = CL • ∆VO LT201_202_203 • AI04 201a23fb 6
U U W U APPLICATIO S I FOR ATIO Switching Time Test Circuit
output switch on. Feedthrough via gate capacitance may result in spikes at leading and trailing edge of output Switch output waveform shown for VS = constant with waveform. logic input waveform as shown. Note that VS may be + or – as per switching time test circuit. VO is the steady state
Switching Time Test Circuit
LOGIC “1” = SW ON SWITCH SWITCH INPUT NO 3V OUTPUT S1 D1 LOGIC INPUT 50% VS = 2V VO tr < 20ns 0V R C t L R L L f < 20ns V 1k = V Ω 35pF O IN1 S R + r LOGIC “0” = SW ON L DS(ON) NC 3V LOGIC LOGIC INPUT INPUT 50% tr < 20ns 0V t (REPEAT TEST FOR IN2, IN3 AND IN4) f < 20ns SWITCH VS INPUT LT201_202_203 • AI02 V 0.9 0.9 O VO SWITCH 0V OUTPUT tON tOFF LT201_202_203 • AI01
Charge Injection Test Circuit
∆ VO RGEN SX DX VO C V L = GEN 1000pF INX VO 3V OFF NC LT201_202_203 • AI03 ON ON 0V ON ON 3V NO OFF 0V ∆ VO IS THE MEASURED VOLTAGE ERROR DUE TO CHARGE INJECTION. THE ERROR VOLTAGE IN COULOMBS IS ∆Q = CL • ∆VO LT201_202_203 • AI04 201a23fb 6