MC1651 データシートの表示（PDF） - Motorola => Freescale

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MC1651

Dual A/D Converter   

Motorola => Freescale 

MC1650 MC1651

FIGURE 3 — CLOCK ENABLE AND APERTURE TIME TEST CIRCUIT AND WAVEFORMS @ 25°C

Vin to Channel A

VCC = +7.0 VXX = +2.0

Vdc

Vdc

Vout to Channel B

0.1

0.1

µF

µF

10 7 1 16

VCC Gnd

Vin

VR

+

–

D

Q

C

Q

+

–

D

Q

50

C

Q

VEE

8

0.1 µF

VEE = –3.2 Vdc

50 ohm termination to ground located in each scope channel input.

All input and output cables to the scope are equal lengths of 50 ohms coaxial cable.

ANALOG SIGNAL POSITIVE AND NEGATIVE SLEW CASE

Vin Negative

Vin Positive

C

Q Positive

Q Negative

Clock Enable

Time

50%

Clock Aperature

Time

tpd

V

50%

V

50%

tpd

VR + 100 mV = +2.1 V

VR = 2.0 V

VR – 100 mV = +1.9 V

VIH = +1.11 V

VIL = +0.31 V

“1”

“0”

“1”

“0”

Clock enable time = minimum time between analog and clock signal such that output switches, and tpd

(analog to Q) is not degraded by more than 200 ps.

Clock aperture time = time difference between clock enable time and time that output does not switch and

V is less than 150 mV.

Note: All power supply and logic levels are shown shifted 2.0 volts positive.

MECL Data

DL122 — Rev 6

4–339

MOTOROLA

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