MC1651

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Dual A/D Converter MC1650 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 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. MC1651 u L SUFFIX CERAMIC PACKAGE CASE 620–10 LOGIC DIAGRAM V1A 6 V2A 5 CA 4 V1B 12 V2B 11 CB 13 + – D Q 2 Q0 PIN ASSIGNMENT Q 3 Q0 GND + – D Q 14 Q1 Q0 Q0 Q 15 Q1 CA V2A VCC = +5.0 V = PIN 7, 10 VEE = –5.2 V = PIN 8 GND = PIN 1, 16 V1A VCC VEE 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 GND Q1 Q1 CB V1B V2B VCC NC 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) –2.5 V to +3.0...