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AD744AHADN/a4avaiPrecision, 500 ns Settling BiFET Op Amp
AD744JNN/a35avaiPrecision, 500 ns Settling BiFET Op Amp
AD744JRADIN/a1327avaiPrecision, 500 ns Settling BiFET Op Amp
AD744KNADIN/a135avaiPrecision, 500 ns Settling BiFET Op Amp
AD744KRN/a61avaiPrecision, 500 ns Settling BiFET Op Amp


AD744JR ,Precision, 500 ns Settling BiFET Op AmpCHARACTERISTICSVoltage R ≥ 2 kΩ +13, –12.5 +13.9, –13.3 +13, –12.5 +13.9, –13.3 VLOADT to T ±12 +13 ..
AD744JRZ , Precision, 500 ns Settling BiFET Op Amp
AD744KN ,Precision, 500 ns Settling BiFET Op Ampspecifications are guaranteed after 5 minutes of operation at T = +25°C.A2PSRR test conditions: +V ..
AD744KR ,Precision, 500 ns Settling BiFET Op Ampspecifications are guaranteed.–2– REV.CAD7441ABSOLUTE MAXIMUM RATINGSORDERING GUIDESupply Voltage . ..
AD745 ,Ultralow Noise, High Speed, BiFET Op Ampapplications demanding low noise andSonarhigh dc precision. Furthermore, the AD745 does not exhibit ..
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ADF7901BRU ,High Performance ISM Band ASK/FSK Transmitter ICFEATURES 8 different channels, selectable by 3 external control lines. OOK Single chip low power UH ..
ADG1204YRUZ , Low Capacitance, Low Charge Injection, ±15 V/12 V, 4:1 iCMOS Multiplexer


AD744AH-AD744JN-AD744JR-AD744KN-AD744KR
Precision, 500 ns Settling BiFET Op Amp
REV.C
Precision, 500 ns Settling
BiFET Op Amp
CONNECTION DIAGRAMS
TO-99 (H) Package
FEATURES
AC PERFORMANCE
500 ns Settling to 0.01% for 10 V Step
1.5 �s Settling to 0.0025% for 10 V Step
75 V/�s Slew Rate
0.0003% Total Harmonic Distortion (THD)
13 MHz Gain Bandwidth – Internal Compensation
>200 MHz Gain Bandwidth (G = 1000)
External Decompensation
>1000 pF Capacitive Load Drive Capability with
10 V/�s Slew Rate – External Compensation
DC PERFORMANCE
0.5 mV max Offset Voltage (AD744B)
10 �V/�C max Drift (AD744B)
250 V/mV min Open-Loop Gain (AD744B)
Available in Plastic Mini-DIP, Plastic SOIC, Hermetic
Cerdip, Hermetic Metal Can Packages and Chip Form
Surface Mount (SOIC) Package Available in Tape and
Reel in Accordance with EIA-481A Standard
APPLICATIONS
Output Buffers for 12-Bit, 14-Bit and 16-Bit DACs,
ADC Buffers, Cable Drivers, Wideband
Preamplifiers and Active Filters
PRODUCT DESCRIPTION

The AD744 is a fast-settling, precision, FET input, monolithic
operational amplifier. It offers the excellent dc characteristics
of the AD711 BiFET family with enhanced settling, slew rate,
and bandwidth. The AD744 also offers the option of using
custom compensation to achieve exceptional capacitive load
drive capability.
The single-pole response of the AD744 provides fast settling:
500 ns to 0.01%. This feature, combined with its high dc preci-
sion, makes it suitable for use as a buffer amplifier for 12-bit,
14-bit or 16-bit DACs and ADCs. Furthermore, the AD744’s low
total harmonic distortion (THD) level of 0.0003% and gain band-
width product of 13 MHz make it an ideal amplifier for demanding
audio applications. It is also an excellent choice for use in active
filters in 12-bit, 14-bit and 16-bit data acquisition systems.
The AD744 is internally compensated for stable operation as a
unity gain inverter or as a noninverting amplifier with a gain of
two or greater. External compensation may be applied to the
AD744 for stable operation as a unity gain follower. External
compensation also allows the AD744 to drive 1000 pF capacitive
loads, slewing at 10 V/µs with full stability.
Alternatively, external decompensation may be used to increase
the gain bandwidth of the AD744 to over 200 MHz at high
gains. This makes the AD744 ideal for use as ac preamps in
digital signal processing (DSP) front ends.
The AD744 is available in five performance grades. The AD744J
and AD744K are rated over the commercial temperature range
of 0°C to +70°C. The AD744A and AD744B are rated over
the industrial temperature range of –40°C to +85°C. The AD744T
is rated over the military temperature range of –55°C to +125°C
and is available processed to MIL-STD-883B, Rev. C.
The AD744 is available in an 8-lead plastic mini-DIP, 8-lead
small outline, 8-lead cerdip or TO-99 metal can.
PRODUCT HIGHLIGHTS
The AD744 is a high-speed BiFET op amp that offers excel-
lent performance at competitive prices. It outperforms the
OPA602/OPA606, LF356 and LF400.The AD744 offers exceptional dynamic response. It settles to
0.01% in 500 ns and has a 100% tested minimum slew rate
of 50 V/µs (AD744B).The combination of Analog Devices’ advanced processing
technology, laser wafer drift trimming and well-matched
ionimplanted JFETs provide outstanding dc precision. Input
offset voltage, input bias current, and input offset current are
specified in the warmed-up condition; all are 100% tested.
8-Lead Plastic Mini-DIP (N)
8-Lead SOIC (R) Package and
8-Lead Cerdip (Q) Packages
AD744–SPECIFICATIONS(@ +25�C and �15 V dc, unless otherwise noted)
INPUT VOLTAGE RANGE
NOTES
1Input offset voltage specifications are guaranteed after 5 minutes of operation at TA = +25°C.
2PSRR test conditions: +VS = 15 V, –VS = –12 V to –18 V and +VS = +12 V to +18 V, –VS = –15 V.
3Bias Current Specifications are guaranteed maximum at either input after 5 minutes of operation at TA = +25°C. For higher temperature, the current doubles every 10°C.
4Gain = –1, RL = 2 k, CL = 10 pF, refer to Figure 25.
5Defined as voltage between inputs, such that neither exceeds ±10 V from ground.
6Typically exceeding –14.1 V negative common-mode voltage on either input results in an output phase reversal.
7Open-Loop Gain is specified with VOS both nulled and unnulled.
ABSOLUTE MAXIMUM RATINGS1
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±18 V
Internal Power Dissipation2 . . . . . . . . . . . . . . . . . . . .500 mW
Input Voltage3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±18 V
Output Short Circuit Duration . . . . . . . . . . . . . . . .Indefinite
Differential Input Voltage . . . . . . . . . . . . . . . . . .+VS and –VS
Storage Temperature Range (Q, H) . . . . . .–65°C to +150°C
Storage Temperature Range (N, R) . . . . . . .–65°C to +125°C
Operating Temperature Range
AD744J/K . . . . . . . . . . . . . . . . . . . . . . . . . . .0°C to +70°C
AD744A/B . . . . . . . . . . . . . . . . . . . . . . . . .–40°C to +85°C
AD744S/T . . . . . . . . . . . . . . . . . . . . . . . .–55°C to +125°C
Lead Temperature Range (Soldering 60 seconds) . . . . .300°C
NOTESStresses above those listed under Absolute Maximum Ratings may cause perma-
nent 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.Thermal Characteristics
8-Lead Plastic Package:θJA = 100°C/Watt, θJC = 33°C/Watt
8-Lead Cerdip Package:θJA = 110°C/Watt, θJC = 22°C/Watt
8-Lead Metal Can Package:θJA = 150°C/Watt, θJC = 65°C/Watt
8-Lead SOIC Package:θJA = 160°C/Watt, θJC = 42°C/WattFor supply voltages less than ±18 V, the absolute maximum input voltage is equal
to the supply voltage.
ORDERING GUIDE

*N = Plastic DIP; SO = Small Outline IC; Q = Cerdip; H = TO-99 Metal Can.
METALIZATION PHOTOGRAPH

Contact factory for latest dimensions.
Dimensions shown in inches and (mm).
AD744
–Typical Characteristics

Figure 1.Input Voltage Swing
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.
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 vs. Frequency
CCOMP = 0 pF
Figure 13.Common-Mode and
Power Supply Rejection vs.
Frequency
Figure 16.Total Harmonic Distortion
vs. Frequency, Circuit of Figure 20
(G = 10)
Figure 11.Open Loop Gain and
Phase Margin vs. Frequency
CCOMP = 25 pF
Figure 14.Large Signal Frequency
Response
Figure 17.Input Noise Voltage
Spectral Density
Figure 12.Open-Loop Gain vs.
Supply Voltage
Figure 15.Output Swing and Error
vs. Settling Time
Figure 18.Slew Rate vs. Input
Error Signal
AD744
–Typical Characteristics

Figure 19.Settling Time vs. Closed
Loop Voltage Gain
Figure 22a.Unity-Gain Follower
Figure 23a.Unity-Gain Inverter
Figure 20.THD Test Circuit
Figure 22b.Unity-Gain Follower
Large Signal Pulse Response,
CCOMP = 5 pF
Figure 23b.Unity-Gain Inverter Large
Signal Pulse Response, CCOMP = 5 pF
Figure 21.Offset Null Configuration
Figure 22c.Unity-Gain Follower
Small Signal Pulse Response,
CCOMP = 5 pF
Figure 23c.Unity-Gain Inverter Small
Signal Pulse Response, CCOMP = 0 pF
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