AD790KN AD [Analog Devices], AD790KN Datasheet

AD790KN

Manufacturer Part Number

AD790KN

Description

Fast, Precision Comparator

Manufacturer

AD [Analog Devices]

Datasheet

1.AD790KN.pdf (8 pages)

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Company:

Bonase Electronics (HK) Co., Limited

Part Number:

AD790KN

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Quantity:

5 510

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REV. B

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

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.

PRODUCT DESCRIPTION

The AD790 is a fast (45 ns), precise voltage comparator, with a

number of features that make it exceptionally versatile and easy

to use. The AD790 may operate from either a single +5 V sup-

ply or a dual 15 V supply. In the single-supply mode, the

AD790’s inputs may be referred to ground, a feature not found

in other comparators. In the dual-supply mode it has the unique

ability of handling a maximum differential voltage of 15 V across

its input terminals, easing their interfacing to large amplitude

and dynamic signals.

This device is fabricated using Analog Devices’ Complementary

Bipolar (CB) process–which gives the AD790’s combination of

fast response time and outstanding input voltage resolution

(1 mV max). To preserve its speed and accuracy, the AD790

incorporates a “low glitch” output stage that does not exhibit

the large current spikes normally found in TTL or CMOS out-

put stages. Its controlled switching reduces power supply distur-

bances that can feed back to the input and cause undesired

oscillations. The AD790 also has a latching function which makes

it suitable for applications requiring synchronous operation.

The AD790 is available in five performance grades. The AD790J

and the AD790K are rated over the commercial temperature

range of 0 C to +70 C. The AD790A and AD790B are rated

over the industrial temperature range of –40 C to +85 C. The

AD790S is rated over the military temperature range of –55 C to

+125 C and is available processed to MIL-STD-883B, Rev. C.

FEATURES

45 ns max Propagation Delay

Single +5 V or Dual

CMOS or TTL Compatible Output

250 V max Input Offset Voltage

500 V max Input Hysteresis Voltage

15 V max Differential Input Voltage

Onboard Latch

60 mW Power Dissipation

Available in 8-Pin Plastic and Hermetic Cerdip

Available in Tape and Reel in Accordance with

APPLICATIONS

Zero-Crossing Detectors

Overvoltage Detectors

Pulse-Width Modulators

Precision Rectifiers

Discrete A/D Converters

Delta-Sigma Modulator A/Ds

Packages

MIL-STD-883B Processing Available

EIA-481A Standard

15 V Supply Operation

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

PRODUCT HIGHLIGHTS

1. The AD790’s combination of speed, precision, versatility

2. Built-in hysteresis and a low-glitch output stage minimize the

3. The hysteresis combined with a wide input voltage range

4. A wide variety of supply voltages are acceptable for operation

5. The AD790’s power dissipation is the lowest of any compara-

6. The AD790’s output swing is symmetric between V

and low cost makes it suitable as a general purpose compara-

tor in analog signal processing and data acquisition systems.

chance of unwanted oscillations, making the AD790 easier to

use than standard open-loop comparators.

enables the AD790 to respond to both slow, low level (e.g.,

10 mV) signals and fast, large amplitude (e.g., 10 V) signals.

of the AD790, ranging from single +5 V to dual +5 V/–12 V,

tor in its speed range.

and ground, thus providing a predictable output under a

wide range of input and output conditions.

5 V, or +5 V/ 15 V supplies.

OUTPUT

LOGIC

–V

+IN

–IN

+IN

CONNECTION DIAGRAMS

8-Pin Plastic Mini-DIP (N)

and Cerdip (Q) Packages

8-Pin SOIC (R) Package

–

AD790

Fast, Precision

AD790

–

Comparator

OUTPUT

GROUND

LATCH

LOGIC

AD790

GROUND

LATCH

–IN

–V

Fax: 617/326-8703

LOGIC

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AD790KN Summary of contents

Page 1

FEATURES 45 ns max Propagation Delay Single + Dual 15 V Supply Operation CMOS or TTL Compatible Output 250 V max Input Offset Voltage 500 V max Input Hysteresis Voltage 15 V max Differential Input Voltage Onboard ...

Page 2

AD790–SPECIFICATIONS DUAL SUPPLY (Operation @ +25 C and +V Parameter Conditions RESPONSE CHARACTERISTIC 100 mV Step Propagation Delay Overdrive PD T MIN OUTPUT CHARACTERISTICS Output HIGH Voltage, V 1.6 mA Source OH 6.4 mA Source T MIN ...

Page 3

SINGLE SUPPLY (Operation @ +25 C and +V Parameter Conditions RESPONSE CHARACTERISTIC 100 mV Step Propagation Delay Overdrive PD T MIN OUTPUT CHARACTERISTICS Output HIGH Voltage, V 1.6 mA Source OH 6.4 mA Source T MIN Output ...

Page 4

... Thermal characteristics: plastic N-8 package: package: JA watt C/watt. JC Model AD790JN AD790JR AD790JR-REEL AD790JR-REEL7 +70 C AD790KN AD790AQ AD790BQ AD790SQ AD790SQ/883B AD790S Chips +IN –IN 510 OUTPUT Figure 2. Basic Single Supply Configuration (N, Q Package Pinout) 0.1µF – ...

Page 5

Figure 4. Propagation Delay vs. Overdrive Figure 7. Propagation Delay vs. Source Resistance 5.0 4.9 4.8 TEMP = +25°C 4.7 4.6 4.5 4.4 4.3 4 – mA SOURCE Figure 10. Output High Voltage vs. ...

Page 6

AD790 CIRCUIT DESCRIPTION The AD790 possesses the overall characteristics of a standard monolithic comparator: differential inputs, high gain and a logic output. However, its function is implemented with an architec- ture which offers several advantages over previous comparator designs. Specifically, ...

Page 7

AD790 OUT 7 –IN 6 – +12V, – +5V LOGIC ...

Page 8

AD790 + 5V – 5V BIPOLAR SIGNAL INPUT 400 * STANDARD SCHOTTKY 6 3 DIODE 4 GND * A RESISTOR UP TO 10kΩ MAYBE USED TO REDUCE THE SOURCE AND SINK CURRENT OF THE DRIVER. ...

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