Full Window Comparator
2.0 pF max Input Capacitance
9 V max Differential Input Voltage
2.5 ns Propagation Delays
Low Input Bias Current
Independent Latch Function
Input Inhibit Mode
80 dB CMRR
High Speed Pin Electronic Receiver
High Speed Triggers
Window Comparator with Latch
FUNCTIONAL BLOCK DIAGRAM
The AD1317 is an ultrahigh speed window comparator with a
latch. It uses a high speed monolithic process to provide high dc
accuracy without sacrificing input voltage range. The AD1317
guarantees a 2.8 ns maximum propagation delay.
On-chip connection of the common input eliminates the contri-
butions of a second bonding pad and package pin to the input
capacitance, resulting in a maximum input capacitance of 2 pF.
The dispersion, or variation in propagation delay with input
overdrive levels and slew rates, is typically 350 ps for 5 V signals
and 200 ps for 1 V inputs.
The AD1317 employs a high precision differential input stage
with a common-mode range of 9 V. Its complementary digital
outputs are ECL compatible. The output stage is capable of
driving a 50 Ω line terminated to –2 V. The AD1317 also pro-
vides a latch function, allowing operation in a sample-hold
mode. The latch inputs can also be used to generate hysteresis.
The comparator input can be switched into a high impedance
state through the inhibit mode feature, electrically removing the
comparator from the circuit. The bias current in inhibit mode is
typically 50 pA.
The AD1317 is available in a small 16-lead, hermetically sealed
“gull-wing” surface mount package and operates over the com-
mercial temperature range, 0°C to +70°C.
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use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
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