MAX902 Maxim, MAX902 Datasheet - Page 12

• Manufacturer Part Number: MAX902
• Description: The MAX900–MAX903 high-speed, low-power, single/dual/quad voltage comparators feature differential analog inputs and TTL-logic outputs with active internal pullups
• Manufacturer: Maxim

Figure 6. Response to 50MHz Sine Wave
Figure 8. Alarm Circuit Level Monitors Eight Separate Inputs
INPUT
8-BIT
DATA
MSB
LSB
10mV/div
D7
D1
A0
A1
A2
OUTPUT
High-Speed, Low-Power Voltage Comparators
1V/div
INPUT
CONTROL
MX7228
LATCH
OCTAL
DATA
LOGIC
8-BIT
8 x 8
DAC
VREF
+1.25V
______________________________________________________________________________________
VDAC1
VDAC8
5ns/div
V
V
OUT8
OUT1
IN7
IN8
IN2
IN3
IN5
IN6
IN1
IN4
MAX901
MAX901
UNDER
LIMIT
OVER
LIMIT
UNDER
LIMIT
UNDER
LIMIT
UNDER
LIMIT
UNDER
LIMIT
OVER
LIMIT
OVER
LIMIT
Figure 7. Response to 100MHz Sine Wave Photo
By combining two quad analog comparators with an
octal 8-bit D/A converter (the MX7228), several alarm
and limit-defect functions can be performed simultane-
ously without external adjustments
The MX7228’s internal latches allow the system
processor to set the limit points for each comparator
independently and update them at any time. Set the
upper and lower thresholds for a single transducer by
pairing the D/A converter and comparator sections.
10mV/div
OUTPUT
1V/div
INPUT
Programmed, Variable-Alarm Limits
Typical Application
5ns/div
11