http://www.www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf




Analog Devices Semiconductor Electronic Components Datasheet

AD644 Datasheet

Dual High Speed/ Implanted BiFET Op Amp

No Preview Available !

AD644 pdf
a
Dual High Speed,
Implanted BiFET Op Amp
FEATURES
Matched Offset Voltage
Matched Offset Voltage Over Temperature
Matched Bias Currents
Crosstalk –124 dB at 1 kHz
Low Bias Current: 35 pA max Warmed Up
Low Offset Voltage: 500 V max
Low Input Voltage Noise: 2 V p-p
High Slew Rate: 13 V/s
Low Quiescent Current: 4.5 mA max
Fast Settling to ؎0.01%: 3 s
Low Total Harmonic Distortion: 0.0015% at 1 kHz
Standard Dual Amplifier Pinout
Available in Hermetic Metal Can Package
and Chip Form
MIL-STD-883B Processing Available
Single Version Available: AD544
AD644
PIN CONFIGURATION
AMPLIFIER NO. 1
+V
AMPLIFIER NO. 2
8
OUTPUT 1
7 OUTPUT
INVERTING 2
INPUT
NONINVERTING 3
INPUT
TOP
VIEW
4
6 INVERTING
INPUT
5 NONINVERTING
INPUT
NOTE:
–V
PIN 4 CONNECTED TO CASE
PRODUCT DESCRIPTION
The AD644 is a pair of matched high speed monolithic FET in-
put operational amplifiers fabricated with the most advanced bi-
polar, JFET and laser-trimming technologies. The AD644 offers
matched bias currents that are significantly lower than currently
available monolithic dual BiFET operational amplifiers: 35 pA
max, matched to 25 pA for the AD644K and L, 75 pA max
matched to 35 pA for the AD644J and S. In addition, the offset
voltage is laser trimmed to less than 0.5 mV, and matched to
0.25 mV for the AD644L, 1.0 mV and matched to 0.5 mV for
the AD644K, utilizing Analog Devices’ laser-wafer trimming
(LWT) process.
The tight matching and temperature tracking between the op-
erational amplifiers is achieved by ion-implanted JFETs and
laser-wafer trimming. Ion-implantation permits the fabrication
of precision, matched JFETs on a monolithic bipolar chip. This
process optimizes the ability to produce matched amplifiers
which have lower initial bias currents than other popular BiFET
op amps. Laser-wafer trimming each amplifier’s input offset
voltage assures tight initial match and superior IC processing
guarantees offset voltage tracking over the temperature range.
The AD644 is recommended for applications in which both
excellent ac and dc performance is required. The matched am-
plifiers provide a low cost solution to true wideband instrumen-
tation amplifiers, low dc drift active filters and output amplifiers
for four quadrant multiplying D/A converters such as the
AD7541, 12-bit CMOS DAC.
The AD644 is available in four versions: the “J”, “K” and “L”
are specified over the 0°C to +70°C temperature range and the
“S” over the –55°C to +125°C operating temperature range.
All devices are packaged in the hermetically sealed, TO-99
metal can or available in chip form.
PRODUCT HIGHLIGHTS
1. The AD644 has tight side to side matching specifications to
ensure high performance without matching individual devices.
2. Analog Devices, unlike some manufacturers, specifies each
device for the maximum bias current at either input in the
warmed-up condition, thus assuring the user that the AD644
will meet its published specifications in actual use.
3. Laser-wafer-trimming reduces offset voltage to as low as
0.5 mV max matched side to side to 0.25 mV (AD644L),
thus eliminating the need for external nulling.
4. Improved bipolar and JFET processing on the AD644 result
in the lowest matched bias current available in a high speed
monolithic FET op amp.
5. Low voltage noise (2 µV p-p) and high open loop gain
enhance the AD644’s performance as a precision op amp.
6. The high slew rate (13.0 V/µs) and fast settling time to
0.01% (3.0 µs) make the AD644 ideal for D/A, A/D, sample-
hold circuits and dual high speed integrators.
7. Low harmonic distortion (0.0015%) and low crosstalk
(–124 dB) make the AD644 an ideal choice for stereo audio
applications.
8. The standard dual amplifier pin out allows the AD644 to
replace lower performance duals without redesign.
9. The AD644 is available in chip form.
REV. A
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703


Analog Devices Semiconductor Electronic Components Datasheet

AD644 Datasheet

Dual High Speed/ Implanted BiFET Op Amp

No Preview Available !

AD644 pdf
AD644–SPECIFICATIONS (@ +25؇C and VS = ؎15 V dc)
Model
AD644J
Min Typ Max
AD644K
Min Typ Max
AD644L
Min Typ Max
AD644S
Min Typ Max
Units
OPEN LOOP GAIN
VO = ± 10 V, RL 2 k
TMIN to TMAX, RL = 2 k
OUTPUT CHARACTERISTICS
Voltage @ RL = 2 k, TMIN to TMAX
Voltage @ RL = 10 k, TMIN to TMAX
Short Circuit Current
30,000
20,000
؎10 ± 12
؎12 ± 13
25
50,000
40,000
؎10 ± 12
؎12 ± 13
25
50,000
40,000
؎10 ± 12
؎12 ± 13
25
50,000
20,000
؎10 ± 12
؎12 ± 13
25
V/V
V/V
V
V
mA
FREQUENCY RESPONSE
Unity Gain Small Signal 2.0 2.0 2.0 2.0 MHz
Full Power Response
Slew Rate, Unity Gain
Total Harmonic Distortion
200
8.0 13.0
0.0015
200
8.0 13.0
0.0015
200
8.0 13.0
0.0015
200
8.0 13.0
0.0015
kHz
V/µs
%
INPUT OFFSET VOLTAGE1
Initial Offset
2.0 1.0 0.5 1.0 mV
Input Offset Voltage TMIN to TMAX
Input Offset Voltage vs. Supply,
TMIN to TMAX
INPUT BIAS CURRENT2
Either Input
3.5
200
10 75
2.0
100
10 35
1.0
100
10 35
3.5 mV
100 µV/V
10 35 pA
Offset Current
10 5 5 5 pA
MATCHING CHARACTERISTICS3
Input Offset Voltage
1.0 0.5 0.25 0.5 mV
Input Offset Voltage TMIN to TMAX 3.5 2.0 1.0 3.5 mV
Input Bias Current
35 25 25 35 pA
Crosstalk
–124
–124
–124
–124
dB
INPUT IMPEDANCE
Differential
Common Mode
INPUT VOLTAGE RANGE
Differential4
Common Mode
Common-Mode Rejection
1012ʈ6
1012ʈ3
± 20
± 10 ± 12
76
1012ʈ6
1012ʈ3
± 20
± 10 ± 12
80
1012ʈ6
1012ʈ3
± 20
± 10 ± 12
80
1012ʈ6
1012ʈ3
± 20
± 10 ± 12
80
MʈpF
MʈpF
V
V
dB
INPUT NOISE
Voltage 0.1 Hz to 10 Hz
2
2
2
2 µV p-p
f = 10 Hz
35 35 35 35 nV/Hz
f = 100 Hz
22 22 22 22 nV/Hz
f = 1 kHz
18 18 18 18 nV/Hz
f = 10 kHz
16 16 16 16 nV/Hz
POWER SUPPLY
Rated Performance
Operating
Quiescent Current
± 15 ± 15 ± 15 ± 15 V
± 5 ± 18 ± 5 ± 18 ± 5 ± 18 ± 5 ± 18 V
3.5 4.5
3.5 4.5
3.5 4.5
3.5 4.5 mA
TEMPERATURE RANGE
Operating, Rated Performance
Storage
0
–65
+70
+150
0
–65
+70
+150
0
–65
+70
+150
–55
–65
+125
+150
°C
°C
PACKAGE OPTION
TO-99 Style (H-08B)
Chips
AD644JH
AD644JChips
AD644KH
AD644KChips
AD644LH
AD644SH
AD644SChips
NOTES
1Input Offset Voltage specifications are guaranteed after 5 minutes of operation at TA = +25°C.
2Bias Current specifications are guaranteed at maximum at either input after 5 minutes of operation at TA = +25°C. For higher temperatures, the current doubles every 10°C.
3Matching is defined as the difference between parameters of the two amplifiers.
4Defined as voltage between inputs, such that neither exceeds ± 10 V from ground.
Specifications shown in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min and max specifications
are guaranteed, although only those shown in boldface are tested on all production units.
Specifications subject to change without notice.
METALIZATION PHOTOGRAPH
Dimensions shown in inches and (mm).
Contact factory for latest dimensions.
–2– REV. A


Part Number AD644
Description Dual High Speed/ Implanted BiFET Op Amp
Maker Analog Devices
Total Page 6 Pages
PDF Download
AD644 pdf
Download PDF File
AD644 pdf
View for Mobile






Related Datasheet

1 AD640 DC-Coupled Demodulating 120 MHz Logarithmic Amplifier Analog Devices
Analog Devices
AD640 pdf
2 AD6402 IF Transceiver Subsystem Analog Devices
Analog Devices
AD6402 pdf
3 AD641 250 MHz Demodulating Logarithmic Amplifier Analog Devices
Analog Devices
AD641 pdf
4 AD6411 DECT RF Transceiver Analog Devices
Analog Devices
AD6411 pdf
5 AD642 Precision/ Low Cost Dual BiFET Op Amp Analog Devices
Analog Devices
AD642 pdf
6 AD6426 Enhanced GSM Processor Analog Devices
Analog Devices
AD6426 pdf
7 AD6432 GSM 3 V Transceiver IF Subsystem Analog Devices
Analog Devices
AD6432 pdf
8 AD6439 Discrete Multitone (DMT) Coprocessor Analog Devices
Analog Devices
AD6439 pdf
9 AD644 Dual High Speed/ Implanted BiFET Op Amp Analog Devices
Analog Devices
AD644 pdf




Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

site map

webmaste! click here

contact us

Buy Components