AD843JNZ

Manufacturer Part NumberAD843JNZ
DescriptionIC OPAMP GP 34MHZ 50MA 8DIP
ManufacturerAnalog Devices Inc
AD843JNZ datasheets
 


Specifications of AD843JNZ

Slew Rate250 V/µsAmplifier TypeGeneral Purpose
Number Of Circuits1Gain Bandwidth Product34MHz
Current - Input Bias50pAVoltage - Input Offset1000µV
Current - Supply12mACurrent - Output / Channel50mA
Voltage - Supply, Single/dual (±)±4.5 V ~ 18 VOperating Temperature0°C ~ 70°C
Mounting TypeThrough HolePackage / Case8-DIP (0.300", 7.62mm)
Op Amp TypeHigh SpeedNo. Of Amplifiers1
Bandwidth34MHzSupply Voltage Range± 4.5V To ± 18V
Amplifier Case StyleDIPNo. Of Pins8
Common Mode Rejection Ratio72Current, Input Bias50 pA
Current, Input Offset30 pACurrent, Output50 mA
Current, Supply13 mAImpedance, Thermal100 °C/W
Package TypeMini-PDIP-8Power Dissipation1.5 W
Resistance, Input10^10 OhmsTemperature, Operating, Range0 to +70 °C
Time, Rise10 nsVoltage, Input+12 V
Voltage, Noise19 nV/sqrt HzVoltage, Offset1 mV
Voltage, Output, High11.5 VVoltage, Output, Low-12.6 V
Voltage, Supply±15 VLead Free Status / RoHS StatusLead free / RoHS Compliant
Output Type--3db Bandwidth-
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FEATURES
AC PERFORMANCE
Unity Gain Bandwidth: 34 MHz
Fast Settling: 135 ns to 0.01%
Slew Rate: 250 V/ s
Stable at Gains of 1 or Greater
Full Power Bandwidth: 3.9 MHz
DC PERFORMANCE
Input Offset Voltage: 1 mV max (AD843K/B}
Input Bias Current: 0.6 nA typ
Input Voltage Noise: 19 nV/ Hz
Open Loop Gain: 30 V/mV into a 500
Output Current: 50 mA min
Supply Current: 13 mA max
Available in 8-Pin Plastic Mini-DIP & Cerdip, 16-Pin SOIC,
20-Pin LCC and 12-Pin Hermetic Metal Can Packages
Available in Tape and Reel in Accordance with
EIA-481A Standard
Chips and MIL-STD-883B Parts Also Available
APPLICATIONS
High Speed Sample-and-Hold Amplifiers
High Bandwidth Active Filters
High Speed Integrators
High Frequency Signal Conditioning
PRODUCT DESCRIPTION
The AD843 is a fast settling, 34 MHz, CBFET input op amp.
The AD843 combines the low (0.6 nA) input bias currents
characteristic of a FET input amplifier while still providing a
34 MHz bandwidth and a 135 ns settling time (to within 0.01%
of final value for a 10 volt step). The AD843 is a member of the
Analog Devices’ family of wide bandwidth operational amplifi-
ers. These devices are fabricated using Analog Devices’ junction
isolated complementary bipolar (CB) process. This process per-
mits a combination of dc precision and wideband ac perform-
ance previously unobtainable in a monolithic op amp.
The 250 V/ s slew rate and 0.6 nA input bias current of the
AD843 ensure excellent performance in high speed sample-and-
hold applications and in high speed integrators. This amplifier is
also ideally suited for high bandwidth active filters and high fre-
quency signal conditioning circuits.
Unlike many high frequency amplifiers, the AD843 requires no
external compensation and it remains stable over its full operat-
ing temperature range. It is available in five performance grades:
the AD843J and AD843K are rated over the commercial
temperature range of 0 C to +70 C. The AD843A and AD843B
are rated over the industrial temperature range of –40 C to +85 C.
The AD843S is rated over the military temperature range of –55 C
to +125 C and is available processed to MIL-STD-883B, Rev. C.
REV. D
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.
16-Pin SOIC (R-16) Package
Load
TO-8 (H-12A) Package
The AD843 is offered in either 8-pin plastic DIP or hermetic
cerdip packages, in 16-pin SOIC, 20-Pin LCC, or in a 12-pin
metal can. Chips are also available.
PRODUCT HIGHLIGHTS
1. The high slew rate, fast settling time and low input bias cur-
rent of the AD843 make it the ideal amplifier for 12-bit D/A
and A/D buffers, for high speed sample-and-hold amplifiers
and for high speed integrator circuits. The AD843 can re-
place many FET input hybrid amplifiers such as the
LH0032, LH4104 and OPA600.
2. Fully differential inputs provide outstanding performance in
all standard high frequency op amp applications such as sig-
nal conditioning and active filters.
3. Laser wafer trimming reduces the input offset voltage to
1 mV max (AD843K and AD843B).
4. Although external offset nulling is unnecessary in many ap-
plications, offset null pins are provided.
5. The AD843 does not require external compensation at
closed loop gains of 1 or greater.
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
34 MHz, CBFET
Fast Settling Op Amp
AD843
CONNECTION DIAGRAMS
Plastic (N-8) and
Cerdip (Q-8) Package
LCC (E-20A) Package
© Analog Devices, Inc., 1995
Fax: 617/326-8703

AD843JNZ Summary of contents

  • Page 1

    FEATURES AC PERFORMANCE Unity Gain Bandwidth: 34 MHz Fast Settling: 135 ns to 0.01% Slew Rate: 250 V/ s Stable at Gains Greater Full Power Bandwidth: 3.9 MHz DC PERFORMANCE Input Offset Voltage max ...

  • Page 2

    AD843–SPECIFICATIONS Model Conditions 1 INPUT OFFSET VOLTAGE T -T MIN Offset Drift INPUT BIAS CURRENT Initial (T Warmed- MIN INPUT OFFSET CURRENT Initial (T Warmed- MIN INPUT CHARACTERISTICS Input Resistance Input Capacitance INPUT VOLTAGE RANGE Common ...

  • Page 3

    NOTES 1 Standard Military Drawings Available: 5962-9098001M2A (SE/883B), 5962-9098001MXA (SH/883B), 5962-9098001MPA (SQ/883B). 2 Specifications are guaranteed after 5 minutes Full power bandwidth = Slew Rate/2 V peak. 4 All “S” grade T -T specifications are tested with ...

  • Page 4

    AD843–Typical Characteristics Figure 1. Input Voltage Range vs. Supply Voltage Figure 4. Quiescent Current vs. Supply Voltage Figure 7. Input Bias Current vs. Common Mode Voltage Figure 2. Output Voltage Swing vs. Supply Voltage Figure 5. Input Bias Current vs. ...

  • Page 5

    Figure 10. Open Loop Gain and Phase Margin vs. Frequency Figure 13. Common Mode Rejection vs. Frequency Figure 16. Harmonic Distortion vs. Frequency REV. D Figure 11. Open Loop Gain vs. Supply Voltage Figure 14. Large Signal Frequency Response Figure ...

  • Page 6

    AD843–Typical Characteristics Figure 19. Open Loop Gain vs. Resistive Load Figure 20c. Inverter Small Signal Pulse Response Figure 21a. Unity Gain Inverter Circuit for Driving Capacitive Loads Figure 20a. Inverting Amplifier ...

  • Page 7

    Figure 22a. Unity Gain Buffer Amplifier Figure 23a. Unity Gain Buffer Circuit for Driving Capacitive Loads Figure 23d. Buffer Cap Load Large Signal Pulse Response pF REV. D Figure 22b. Buffer Large Signal Pulse Response. ...

  • Page 8

    AD843 GROUNDING AND BYPASSING Like most high bandwidth amplifiers, the AD843 is sensitive to capacitive loading. Although it will drive capacitive loads without degradation of its rated performance, both an increased capacitive load drive capability and ...

  • Page 9

    SAMPLE-AND-HOLD AMPLIFIER CIRCUITS A Fast Switching Sample & Hold Circuit A sample-and-hold circuit possessing short acquisition time and low aperture delay can be built using an AD843 and discrete JFET switches. The circuit of Figure 25 employs five n-channel JFETs ...

  • Page 10

    AD843 equal. Alternatively, an autocalibration circuit using two D/A converters can be employed. This can also be used to calibrate out the effects of offset voltage drift over temperature. The switch choice, for U1s, is critical in this type of ...

  • Page 11

    MEASURING AD843 SETTLING TIME Figure 28 shows the dynamic response of the AD843 while op- erating in the settling time test circuit of Figure 27. The input of the settling time fixture is driven by a flat-top pulse generator. The ...

  • Page 12

    AD843 Mini-DIP Package (N-8) TO-8 Package (H-12A) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 0.4133 (10.50) 0.3977 (10.00 PIN 1 0.0118 (0.30) 0.0040 (0.10) 0.0500 (1.27) BSC LCC Package (E-20A) 0.082 0.018 0.350 0.008 SQ (2.085 0.455) ...