Datenblatt-pdf.com


AD844 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer AD844
Beschreibung Monolithic Op Amp
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 21 Seiten
AD844 Datasheet, Funktion
FEATURES
Wide bandwidth
60 MHz at gain of −1
33 MHz at gain of −10
Slew rate: 2000 V/μs
20 MHz full power bandwidth, 20 V p-p, RL = 500 Ω
Fast settling: 100 ns to 0.1% (10 V step)
Differential gain error: 0.03% at 4.4 MHz
Differential phase error: 0.16° at 4.4 MHz
Low offset voltage: 150 μV maximum (B Grade)
Low quiescent current: 6.5 mA
Available in tape and reel in accordance with
EIA-481-A standard
APPLICATIONS
Flash ADC input amplifiers
High speed current DAC interfaces
Video buffers and cable drivers
Pulse amplifiers
GENERAL DESCRIPTION
The AD844 is a high speed monolithic operational amplifier
fabricated using the Analog Devices, Inc., junction isolated
complementary bipolar (CB) process. It combines high band-
width and very fast large signal response with excellent dc
performance. Although optimized for use in current-to-voltage
applications and as an inverting mode amplifier, it is also suitable
for use in many noninverting applications.
The AD844 can be used in place of traditional op amps, but its
current feedback architecture results in much better ac perfor-
mance, high linearity, and an exceptionally clean pulse response.
This type of op amp provides a closed-loop bandwidth that is
determined primarily by the feedback resistor and is almost
independent of the closed-loop gain. The AD844 is free from
the slew rate limitations inherent in traditional op amps and
other current-feedback op amps. Peak output rate of change can
be over 2000 V/μs for a full 20 V output step. Settling time is
typically 100 ns to 0.1%, and essentially independent of gain.
The AD844 can drive 50 Ω loads to ±2.5 V with low distortion
and is short-circuit protected to 80 mA.
The AD844 is available in four performance grades and three
package options. In the 16-lead SOIC (RW) package, the AD844J
is specified for the commercial temperature range of 0°C to 70°C.
Rev. F
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 that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
60 MHz 2000 V/μs
Monolithic Op Amp
AD844
FUNCTIONAL BLOCK DIAGRAMS
NULL 1
–IN 2
+IN 3
–VS 4
AD844
8 NULL
7 +VS
6 OUTPUT
5 TZ
TOP VIEW
(Not to Scale)
Figure 1. 8-Lead PDIP (N) and 8-Lead CERDIP (Q) Packages
NC 1
16 NC
OFFSETNULL 2
15 OFFSETNULL
–IN 3
14 V+
NC 4
13 NC
+IN 5
12 OUTPUT
NC 6
V– 7
AD844
TOP VIEW
11 TZ
10 NC
NC 8 (Not to Scale) 9 NC
NC = NO CONNECT
Figure 2. 16-Lead SOIC (R) Package
The AD844A and AD844B are specified for the industrial
temperature range of −40°C to +85°C and are available in the
CERDIP (Q) package. The AD844A is also available in an 8-lead
PDIP (N). The AD844S is specified over the military temperature
range of −55°C to +125°C. It is available in the 8-lead CERDIP
(Q) package. A and S grade chips and devices processed to
MIL-STD-883B, Rev. C are also available.
PRODUCT HIGHLIGHTS
1. The AD844 is a versatile, low cost component providing an
excellent combination of ac and dc performance.
2. It is essentially free from slew rate limitations. Rise and fall
times are essentially independent of output level.
3. The AD844 can be operated from ±4.5 V to ±18 V power
supplies and is capable of driving loads down to 50 Ω, as
well as driving very large capacitive loads using an external
network.
4. The offset voltage and input bias currents of the AD844 are
laser trimmed to minimize dc errors; VOS drift is typically 1
μV/°C and bias current drift is typically 9 nA/°C.
5. The AD844 exhibits excellent differential gain and
differential phase characteristics, making it suitable for a
variety of video applications with bandwidths up to 60 MHz.
6. The AD844 combines low distortion, low noise, and low
drift with wide bandwidth, making it outstanding as an
input amplifier for flash analog-to-digital converters (ADCs).
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©1989–2009 Analog Devices, Inc. All rights reserved.






AD844 Datasheet, Funktion
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Supply Voltage
Power Dissipation1
Output Short-Circuit Duration
Input Common-Mode Voltage
Differential Input Voltage
Inverting Input Current
Continuous
Transient
Storage Temperature Range (Q)
Storage Temperature Range (N, RW)
Lead Temperature (Soldering, 60 sec)
ESD Rating
Ratings
±18 V
1.1 W
Indefinite
±VS
6V
5 mA
10 mA
−65°C to +150°C
−65°C to +125°C
300°C
1000 V
1 28-lead PDIP package: θJA = 90°C/W.
8-lead CERDIP package: θJA = 110°C/W.
16-lead SOIC package: θJA = 100°C/W.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
AD844
METALLIZATION PHOTOGRAPH
Contact factory for latest dimensions.
Dimensions shown in inches and (millimeters).
–IN
NULL
NULL
+VS
0.076
(1.9)
+IN
ESD CAUTION
–VS
0.095
(2.4)
TZ
SUBSTRATE CONNECTED TO +VS
Figure 3. Die Photograph
OUTPUT
Rev. F | Page 5 of 20

6 Page









AD844 pdf, datenblatt
NONINVERTING GAIN-OF-10 AC CHARACTERISTICS
4.7
+VS
0.22µF
50
–IN
450
AD844
OUTPUT
+
0.22µF
RL
CL
4.7
–VS
Figure 23. Noninverting Gain of +10 Amplifier
26
20
RL = 50
RL = 500
14
8
2
–4
100k
–180
1M 10M
FREQUENCY (Hz)
Figure 24. Gain vs. Frequency, Gain = +10
100M
–210
–240
RL = 50
RL = 500
–270
–300
–330
0
25
FREQUENCY (MHz)
Figure 25. Phase vs. Frequency, Gain = +10
50
2V
100
90
AD844
100ns
10
0
Figure 26. Noninverting Amplifier Large Signal Pulse Response, Gain = +10,
RL = 500 Ω
200nV
100
90
50ns
10
0
Figure 27. Small Signal Pulse Response, Gain = +10, RL = 500 Ω
Rev. F | Page 11 of 20

12 Page





SeitenGesamt 21 Seiten
PDF Download[ AD844 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
AD840Fast Settling Op AmpAnalog Devices
Analog Devices
AD84001-/2-/4-Channel Digital PotentiometersAnalog Devices
Analog Devices
AD84018-Bit/ 4-Channel Data Acquisition SystemAnalog Devices
Analog Devices
AD84022-Channel/ 256-Position Digital PotentiometerAnalog Devices
Analog Devices
AD84032-Channel/ 256-Position Digital PotentiometerAnalog Devices
Analog Devices

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche