MC1650 Datasheet, PDF (1/11 Pages) Motorola, Inc – DUAL A/D CONVERTER

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Dual A/D Converter
The MC1650 and the MC1651 are very high speed comparators utilizing
differential amplifier inputs to sense analog signals above or below a reference
level. An output latch provides a unique sample-hold feature. The MC1650
provides high impedance Darlington inputs, while the MC1651 is a lower
impedance option, with higher input slew rate and higher speed capability.
The clock inputs (Ca and Cb) operate from MECL III or MECL 10,000 digital
u ^{levels. When Ca is at a logic high level, Q0 will be at a logic high level provided}
that V1 V2 (V1 is more positive than V2). Q0 is the logic complement of Q0.
When the clock input goes to a low logic level, the outputs are latched in their
present state.
Assessment of the performance differences between the MC1650 and the
MC1651 may be based upon the relative behaviors shown in Figures 4 and 7.
V1A 6
V2A 5
CA 4
LOGIC DIAGRAM
+
–
D
Q
2 Q0
Q
3 Q0
V1B 12
+
V2B 11
–
CB 13
D
Q
Q
14 Q1
15 Q1
VCC = +5.0 V = PIN 7, 10
VEE = –5.2 V = PIN 8
GND = PIN 1, 16
• PD = 330 mW typ/pkg (No Load)
• tpd = 3.5 ns typ (MC1650)
= 3.0 ns typ (MC1651)
• Input Slew Rate = 350 V/µs (MC1650)
= 500 V/µs (MC1651)
• Differential Input Voltage: 5.0 V (–30°C to +85°C)
• Common Mode Range:
–3.0 V to +2.5 V (–30°C to +85°C) (MC1651)
p ^{–2.5 V to +3.0 V (–30°C to +85°C) (MC1650)}
• Resolution: 20 mV (–30°C to +85°C)
• Drives 50 Ω lines
Number at end of terminal denotes pin number for L package (Case 620).
TRUTH TABLE
C
V1 , V2 Q0n _{+ 1} Q0n _{+ 1}
H
u V1 V2
H
L
H
t V1 V2
L
H
L
XX
Q0n
Q0n
MC1650
MC1651
L SUFFIX
CERAMIC PACKAGE
CASE 620–10
PIN ASSIGNMENT
GND 1
Q0
2
Q0
3
CA
4
V2A
5
V1A
6
VCC
7
VEE
8
16 GND
15
Q1
14
Q1
13
CB
12
V1B
11
V2B
10
VCC
9 _NC
3/93
© Motorola, Inc. 1996
4–334
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