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AD841JN ,Wideband, Unity-Gain Stable, Fast Settling Op AmpCHARACTERISTICSVoltage R ≥ 500 ΩLOADT –T ±10 ±10 ±10 VMIN MAXCurrent V = ±10 V 50 50 50 mAOUTOUTPUT ..
AD841JQ ,Wideband, Unity-Gain Stable, Fast Settling Op Ampapplications. Offset nullwidth active filters. The extremely rapid settling time of thepins are pro ..
AD841JQ ,Wideband, Unity-Gain Stable, Fast Settling Op AmpSpecifications subject to change without notice.–2– REV. BAD8411 NOTESABSOLUTE MAXIMUM RATINGS1Stre ..
AD841KN ,Wideband, Unity-Gain Stable, Fast Settling Op AmpFEATURESCONNECTION DIAGRAMSAC PERFORMANCEPlastic DIP (N) PackageUnity-Gain Bandwidth: 40 MHzTO-8 (H ..
ADP3414JRZ ,Dual Bootstrapped MOSFET DriverGENERAL DESCRIPTIONThe ADP3414 is a dual MOSFET driver optimized for drivingtwo N-channel MOSFETs w ..
ADP3415KRM-REEL ,Dual MOSFET Driver with BootstrappingSPECIFICATIONSA CC BSTParameter Symbol Conditions Min Typ Max UnitSUPPLY (VCC)Supply Voltage Range ..
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AD840-AD840JN-AD840KN-AD840KQ
Wideband, Fast Settling Op Amp
REV.C
Wideband,
Fast Settling Op Amp
CONNECTION DIAGRAMSFEATURES
Wideband AC Performance
Gain Bandwidth Product: 400 MHz (Gain ≥ 10)
Fast Settling: 100 ns to 0.01% for a 10 V Step
Slew Rate: 400 V/ms
Stable at Gains of 10 or Greater
Full Power Bandwidth: 6.4 MHz for 20 V p-p into a
500 V Load
Precision DC Performance
Input Offset Voltage: 0.3 mV max
Input Offset Drift: 3 mV/8C typ
Input Voltage Noise: 4 nV/√Hz
Open-Loop Gain: 130 V/mV into a 1 kV Load
Output Current: 50 mA min
Supply Current: 12 mA max
APPLICATIONS
Video and Pulse Amplifiers
DAC and ADC Buffers
Line Drivers
Available in 14-Pin Plastic DIP, Hermetic Cerdip
and 20-Pin LCC Packages and in Chip Form
MIL-STD-883B Processing Available
PRODUCT DESCRIPTIONThe AD840 is a member of the Analog Devices’ family of wide
bandwidth operational amplifiers. This high speed/high precision
family includes, among others, the AD841, which is unity-
gain stable, and the AD842, which is stable at a gain of two or
greater and has 100 mA minimum output current drive. These
devices are fabricated using Analog Devices’ junction isolated
complementary bipolar (CB) process. This process permits a
combination of dc precision and wideband ac performance
previously unobtainable in a monolithic op amp. In addition
to its 400 MHz gain bandwidth product, the AD840 offers
extremely fast settling characteristics, typically settling to within
0.01% of final value in 100 ns for a 10 volt step.
The AD840 remains stable over its full operating temperature
range at closed-loop gains of 10 or greater. It also offers a low
quiescent current of 12 mA maximum, a minimum output
current drive capability of 50 mA, a low input voltage noise of
4 nV/√Hz and a low input offset voltage of 0.3 mV maximum
(AD840K).
The 400 V/μs slew rate of the AD840, along with its 400 MHz
gain bandwidth, ensures excellent performance in video and
pulse amplifier applications. This amplifier is ideally suited for
use in high frequency signal conditioning circuits and wide
bandwidth active filters. The extremely rapid settling time of the
AD840 makes it the preferred choice for data acquisition appli-
cations which require 12-bit accuracy. The AD840 is also ap-
propriate for other applications such as high speed DAC and
ADC buffer amplifiers and other wide bandwidth circuitry.
APPLICATION HIGHLIGHTSThe high slew rate and fast settling time of the AD840 make
it ideal for DAC and ADC buffers, line drivers and all types
of video instrumentation circuitry.The AD840 is truly a precision amplifier. It offers 12-bit
accuracy to 0.01% or better and wide bandwidth, perfor-
mance previously available only in hybrids.The AD840’s thermally balanced layout and the high speed
of the CB process allow the AD840 to settle to 0.01% in
100 ns without the long “tails” that occur with other fast op
amps.Laser wafer trimming reduces the input offset voltage to
0.3 mV max on the K grade, thus eliminating the need for
external offset nulling in many applications. Offset null pins
are provided for additional versatility.Full differential inputs provide outstanding performance
in all standard high frequency op amp applications where
circuit gain will be 10 or greater.The AD840 is an enhanced replacement for the HA2540.
Plastic DIP (N) Package
and
Cerdip (Q) Package
LCC (E) Package
AD840–SPECIFICATIONSINPUT OFFSET VOLTAGE
OPEN-LOOP GAIN
FREQUENCY RESPONSE
OVERDRIVE RECOVERY
(@ +258C and 615 V dc, unless otherwise noted)
NOTESInput offset voltage specifications are guaranteed after 5 minutes at TA = +25°C.Full power bandwidth = slew rate/2 π VPEAK.Refer to Figures 22 and 23.“S” grade TMIN–TMAX specifications are tested with automatic test equipment at TA = –55°C and TA = +125°C.
All min and max specifications are guaranteed. Specifications shown in boldface are tested on all production units.
Specifications subject to change without notice.
AD840
ABSOLUTE MAXIMUM RATINGS1Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±18 V
Internal Power Dissipation2
Plastic (N) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5 W
Cerdip (Q) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.3 W
LCC (E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.0 W
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±VS
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . .±6 V
Storage Temperature Range
Q, E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .–65°C to +150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .–65°C to +125°C
Junction Temperature (TJ) . . . . . . . . . . . . . . . . . . . . .+175°C
Lead Temperature Range (Soldering 60 sec) . . . . . . . .+300°C
NOTESStresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only, and 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.Maximum internal power dissipation is specified so that TJ does not exceed
+175°C at an ambient temperature of +25°C.
Thermal Characteristics:
θJCθJADerate at
Cerdip Package30°C/W110°C/W8.7 mW/°C
Plastic Package30°C/W100°C/T10 mW/°C
LCC Package35°C/W150°C/W6.7 mW/°C
Recommended Heat Sink:
Aavid Engineering© #602B
ORDERING GUIDENOTESJ and S Grade Chips also available.N = Plastic DIP; Q = Cerdip; E = LCC (LeadlessCeramic Chip Carrier).
Plastic DIP (N) Package
and
Cerdip (Q) Package
LCC (E) PackageAD840 Connection Diagrams
METALIZATION PHOTOGRAPHContact factory for latest dimensions.
Dimensions shown in inches and (mm).
Figure 1.Input Common-Mode
Range vs. Supply Voltage
Figure 4.Quiescent Current vs.
Supply Voltage
Figure 7.Quiescent Current vs.
Temperature
AD840–Typical Characteristics
(at +258C and VS = 615 V, unless otherwise noted)Figure 2.Output Voltage Swing
vs. Supply Voltage
Figure 5.Input Bias Current vs.
Temperature
Figure 8.Short-Circuit Current
Limit vs. Temperature
Figure 3.Output Voltage Swing
vs. Load Resistance
Figure 6.Output Impedance vs.
Frequency
Figure 9.Gain Bandwidth Product
vs. Temperature
Figure 10.Open-Loop Gain and
Phase Margin Phase vs. Frequency
Figure 13.Common-Mode
Rejection vs. Frequency
Figure 16.Harmonic Distortion vs.
Frequency
Figure 11.Open-Loop Gain vs.
Supply Voltage
Figure 14.Large Signal Frequency
Response
Figure 17.Input Voltage Noise
Spectral Density
Figure 12.Power Supply Rejection
vs. Frequency
Figure 15.Output Swing and
Error vs. Settling Time
Figure 18.Slew Rate vs.
Temperature
AD840Figure 19a.Inverting Amplifier
Configuration (DIP Pinout)
Figure 19c.Inverter Small Signal
Pulse Response
Figure 19b.Inverter Large Signal
Pulse Response
Figure 20a.Noninverting Amplifier
Configuration (DIP Pinout)
Figure 20c.Noninverting Small
Signal Pulse Response
Figure 20b.Noninverting Large
Signal Pulse Response
Figure 21.Offset Nulling (DIP Pinout)
OFFSET NULLINGThe input offset voltage of the AD840 is very low for a high
speed op amp, but if additional nulling is required, the circuit
shown in Figure 21 can be used.
