AD744AQ Analog Devices Inc, AD744AQ Datasheet

IC OPAMP BIFET 13MHZ PREC 8CDIP

AD744AQ

Manufacturer Part Number
AD744AQ
Description
IC OPAMP BIFET 13MHZ PREC 8CDIP
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD744AQ

Slew Rate
75 V/µs
Rohs Status
RoHS non-compliant
Amplifier Type
J-FET
Number Of Circuits
1
-3db Bandwidth
13MHz
Current - Input Bias
30pA
Voltage - Input Offset
300µV
Current - Supply
3.5mA
Current - Output / Channel
25mA
Voltage - Supply, Single/dual (±)
±4.5 V ~ 18 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
8-CDIP (0.300", 7.62mm)
Op Amp Type
Precision
No. Of Amplifiers
1
Bandwidth
13MHz
Supply Voltage Range
± 4.5V To ± 18V
Amplifier Case Style
DIP
No. Of Pins
8
Output Type
-
Gain Bandwidth Product
-
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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a
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
1. The AD744 is a high-speed BiFET op amp that offers excel-
2. The AD744 offers exceptional dynamic response. It settles to
3. The combination of Analog Devices’ advanced processing
lent performance at competitive prices. It outperforms the
OPA602/OPA606, LF356 and LF400.
0.01% in 500 ns and has a 100% tested minimum slew rate
of 50 V/µs (AD744B).
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.
Precision, 500 ns Settling
8-Lead SOIC (R) Package and
8-Lead Plastic Mini-DIP (N)
8-Lead Cerdip (Q) Packages
CONNECTION DIAGRAMS
TO-99 (H) Package
BiFET Op Amp
AD744

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AD744AQ Summary of contents

Page 1

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 ...

Page 2

AD744–SPECIFICATIONS Model Conditions 1 INPUT OFFSET VOLTAGE Initial Offset Offset MIN vs. Temp. 2 vs. Supply vs. Supply MIN Long-Term Stability 3 INPUT BIAS CURRENT Either Input Either Input ...

Page 3

... For supply voltages less than ± the absolute maximum input voltage is equal 3 to the supply voltage. Model AD744JN and – AD744KN AD744JR AD744KR AD744AQ AD744BQ AD744AH AD744JCHIPS AD744JR-REEL AD744JR-REEL 7 AD744KR-REEL AD744KR-REEL 7 AD744TA/883B N = Plastic DIP Small Outline IC Cerdip TO-99 Metal Can. = 33°C/Watt JC = 22° ...

Page 4

AD744 –Typical Characteristics ...

Page 5

AD744 ...

Page 6

AD744–Typical Characteristics ...

Page 7

POWER SUPPLY BYPASSING The power supply connections to the AD744 must maintain a low impedance to ground over a bandwidth of 10 MHz or more. This is especially important when driving a significant resistive or capacitive load, since all current ...

Page 8

AD744 EXTERNAL FREQUENCY COMPENSATION Even though the AD744 is useable without compensation in most applications, it may be externally compensated for even more flexibility. This is accomplished by connecting a capacitor between Pins 5 and 8. Figure 28, a simplified ...

Page 9

Table II. Recommended Values of C Figures 31 and 32 Gain ( ) ( ) Follower 4. 4. 4. 4. 499 Ω ...

Page 10

AD744 GAIN ADJUST 100 REF IN REF GND 0.1 F ± HIGH-SPEED OP AMP APPLICATIONS AND TECHNIQUES DAC Buffers (I-to-V Converters) Digital-to-analog converters which use bipolar transistors to switch currents into (or out of) their outputs can achieve very fast ...

Page 11

Table IV. Performance Summary for the 3 Op Amp Instrumentation Amplifier Circuit Gain RG Bandwidth 1 NC 3.5 MHz 2 20 kΩ 2.5 MHz 10 2.22 kΩ 1 MHz 202 Ω 100 290 kHz µ Minimizing Settling Time in Real-World ...

Page 12

AD744 In either case, the capacitance C causes the system to go from X a one-pole to a two-pole response; this additional pole increases settling time by introducing peaking or ringing in the op amp’s output. If the value of ...

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