AD790AQ Analog Devices Inc, AD790AQ Datasheet - Page 8
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AD790AQ
Manufacturer Part Number
AD790AQ
Description
Comparator Single R-R O/P ±16.5V/7V 8-Pin CDIP
Manufacturer
Analog Devices Inc
Type
General Purposer
Specifications of AD790AQ
Package
8CDIP
Rail To Rail
Rail to Rail Output
Number Of Channels Per Chip
1
Minimum Single Supply Voltage
4.5 V
Power Supply Type
Single|Dual
Rohs Status
RoHS non-compliant
Design Resources
Automated Calibration Technique That Reduces AD5360 Offset Voltage to Less Than 1 mV (CN0123)
Number Of Elements
1
Output Type
CMOS, TTL
Voltage - Supply
4.5 V ~ 33 V, ±4.5 V ~ 16.5 V
Mounting Type
Through Hole
Package / Case
8-CDIP (0.300", 7.62mm)
Amplifier Type
Comparator
Comparator Type
Fast Precision Voltage
Current, Input Bias
2.7 μA
Current, Input Offset
0.04 μA
Current, Offset, Input
0.04 uA (Typ.)
Current, Supply
10 mA
Impedance, Thermal
110 °C/W
Package Type
CDIP-8
Power Dissipation
60 mW
Propagation Delay
45 ns
Temperature, Operating, Range
-40 to +85 °C
Voltage, Differential Input
±16.5 V
Voltage, Input
0 to +13 V
Voltage, Input Offset
0.45 mV
Voltage, Offset, Input
0.2 mV (Typ.)
Voltage, Supply
5 V
No. Of Comparators
1
Response Time
45ns
Ic Output Type
CMOS, TTL
Supply Current
6.5mA
Supply Voltage Range
4V To 7V, 4.5V To 7V, 4.5V To 33V
Rohs Compliant
No
Lead Free Status / RoHS Status
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AD790AQ
Manufacturer:
TI
Quantity:
34 000
Part Number:
AD790AQ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
AD790
Figure 11. A Bipolar to CMOS TTL Line Receiver (N, Q
Package Pinout)
STANDARD
SCHOTTKY
*
A RESISTOR UP TO 10k
REDUCE THE SOURCE AND SINK CURRENT OF
THE DRIVER. HOWEVER, THIS WILL SLIGHTLY
LOWER THE MAXIMUM USABLE CLOCK RATE.
DIODE
1k
Ω
BIPOLAR
SIGNAL
INPUT
–
5V
Ω
2
3
MAYBE USED TO
1
4
8
GND
+
6
5V
5
400 *
7
Ω
TTL
LEVEL
OUTPUT
4.7V
0.3V
–8–
Bipolar to CMOS/TTL
It is sometimes desirable to translate a bipolar signal (e.g.,
± 5 V) coming from a communications cable or another section
of the system to CMOS/TTL logic levels; such an application is
referred to as a line receiver. Previously, the interface to the
bipolar signal required either a dual (± ) power supply or a refer-
ence voltage level about which the line receiver would switch.
The AD790 may be used in a simple circuit to provide a unique
capability: the ability to receive a bipolar signal while powered
from a single 5 V supply. Other comparators cannot perform
this task. Figure 11 shows a 1 kΩ resistor in series with the input
signal which is then clamped by a Schottky diode, holding the
input of the comparator at 0.4 V below ground. Although the
comparator is specified for a common mode range down to –V
(in this case ground) it is permissible to bring one of the inputs
a few hundred mV below ground. The comparator switches
around this level and produces a CMOS/TTL compatible swing.
The circuit will operate to switching frequencies of 20 MHz.
REV. D
S
,