AD790JR Analog Devices Inc, AD790JR Datasheet - Page 8

• Manufacturer Part Number: AD790JR
• Description: IC PREC COMPARATOR HS 8-SOIC
• Manufacturer: Analog Devices Inc
• Type: General Purposer

Specifications of AD790JR

• Output Type: CMOS, TTL
• 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
• Voltage - Supply: 4.5 V ~ 33 V, ±4.5 V ~ 16.5 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Comparator Type: Precision
• No. Of Comparators: 1
• Amplifier Case Style: SOIC
• No. Of Pins: 8
• Peak Reflow Compatible (260 C): No
• No. Of Circuits: 1
• Leaded Process Compatible: No
• Amplifier Type: Comparator
• Common Mode Rejection Ratio: 95
• Current, Input Bias: 2.5 μA
• Current, Input Offset: 0.04 μA
• Current, Offset, Input: 0.04 uA (Typ.)
• Current, Supply: 4 to 8 mA
• Impedance, Thermal: 160 °C/W
• Package Type: SOIC-8
• Power Dissipation: 242 mW
• Propagation Delay: 40 ns
• Temperature, Operating, Range: 0 to +70 °C
• Voltage, Differential Input: ±16.5 V
• Voltage, Input: -15 to +13 V
• Voltage, Input Offset: 0.2 mV
• Voltage, Offset, Input: 0.45 mV (Typ.)
• Voltage, Supply: ±15 V
• Number Of Elements: 1
• Technology: BiCMOS
• Input Offset Voltage: 1.5mV
• Input Bias Current (typ): 5uA
• Response Time: 45ns
• Single Supply Voltage (typ): 5V
• Dual Supply Voltage (typ): ±3/±5/±9/±12/±15V
• Power Supply Requirement: Single/Dual
• Power Supply Rejection Ratio: 90dB
• Single Supply Voltage (min): 4.5V
• Single Supply Voltage (max): 7V
• Dual Supply Voltage (min): ±2.25V
• Dual Supply Voltage (max): ±16.5V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / Rohs Status: Not Compliant

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
,