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PDF AMP04 Data sheet ( Hoja de datos )
| Número de pieza | AMP04 | |
| Descripción | Precision Single Supply Instrumentation Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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a
Precision Single Supply
Instrumentation Amplifier
AMP04*
FEATURES
Single Supply Operation
Low Supply Current: 700 A max
Wide Gain Range: 1 to 1000
Low Offset Voltage: 150 V max
Zero-In/Zero-Out
Single-Resistor Gain Set
8-Pin Mini-DIP and SO packages
APPLICATIONS
Strain Gages
Thermocouples
RTDs
Battery Powered Equipment
Medical Instrumentation
Data Acquisition Systems
PC Based Instruments
Portable Instrumentation
GENERAL DESCRIPTION
The AMP04 is a single-supply instrumentation amplifier
designed to work over a +5 volt to ± 15 volt supply range. It
offers an excellent combination of accuracy, low power con-
sumption, wide input voltage range, and excellent gain
performance.
Gain is set by a single external resistor and can be from 1 to
1000. Input common-mode voltage range allows the AMP04 to
handle signals with full accuracy from ground to within 1 volt of
the positive supply. And the output can swing to within 1 volt of
the positive supply. Gain bandwidth is over 700 kHz. In addi-
tion to being easy to use, the AMP04 draws only 700 µA of sup-
ply current.
For high resolution data acquisition systems, laser trimming of
low drift thin-film resistors limits the input offset voltage to
under 150 µV, and allows the AMP04 to offer gain nonlinearity
of 0.005% and a gain tempco of 30 ppm/°C.
A proprietary input structure limits input offset currents to less
than 5 nA with drift of only 8 pA/°C, allowing direct connection
of the AMP04 to high impedance transducers and other signal
sources.
*Protected by U.S. Patent No. 5,075,633.
FUNCTIONAL BLOCK DIAGRAM
100k
IN(–) 2
1
INPUT BUFFERS
IN(+) 3
R GAIN
8
11k
11k
100k
5 REF
VOUT
6
The AMP04 is specified over the extended industrial (–40°C to
+85°C) temperature range. AMP04s are available in plastic and
ceramic DIP plus SO-8 surface mount packages.
Contact your local sales office for MIL-STD-883 data sheet
and availability.
PIN CONNECTIONS
8-Lead Epoxy DIP
(P Suffix)
8-Lead Narrow-Body SO
(S Suffix)
RGAIN 1
–IN 2
+IN 3
V– 4
AMP-04
8 RGAIN
7 V+
6 VOUT
5 REF
RGAIN
–IN
+IN
V–
AMP-04
RGAIN
V+
VOUT
REF
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
1 page  
AMP04
Parameter
Symbol
Conditions
Limit
Units
Power Supply Rejection
PSRR
G = 1000
4.0 V ≤ VS ≤ 12 V
G=1
G = 10
G = 100
G = 1000
80 dB min
85 dB min
95 dB min
95 dB min
95 dB min
GAIN (G = 100 K/RGAIN)
Gain Equation Accuracy
G = 1 to 100
0.75 % max
OUTPUT
Output Voltage Swing High
Output Voltage Swing Low
POWER SUPPLY
Supply Current
VOH
VOL
ISY
RL = 2 kΩ
RL = 2 kΩ
VS = ± 15
4.0 V min
2.5 mV max
900 µA max
700 µA max
NOTE
Electrical tests and wafer probe to the limits shown. Due to variations in assembly methods and normal yield loss, yield after packaging is not guaranteed for standard
product dice. Consult factory to negotiate specifications based on dice lot qualifications through sample lot assembly and testing.
ABSOLUTE MAXIMUM RATINGS1
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .± 18 V
Common-Mode Input Voltage2 . . . . . . . . . . . . . . . . . . ± 18 V
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . 36 V
Output Short-Circuit Duration to GND . . . . . . . . . . Indefinite
Storage Temperature Range
Z Package . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +175°C
P, S Package . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Operating Temperature Range
AMP04A . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to +125°C
AMP04E, F . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C
Junction Temperature Range
Z Package . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +175°C
P, S Package . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Lead Temperature Range (Soldering, 60 sec) . . . . . . . +300°C
DICE CHARACTERISTICS
Package Type
8-Pin Cerdip (Z)
8-Pin Plastic DIP (P)
8-Pin SOIC (S)
θJA3
148
103
158
θJC Units
16 °C/W
43 °C/W
43 °C/W
NOTES
1Absolute maximum ratings apply to both DICE and packaged parts, unless
otherwise noted.
2For supply voltages less than ± 18 V, the absolute maximum input voltage is
equal to the supply voltage.
3θJA is specified for the worst case conditions, i.e., θJA is specified for device in
socket for cerdip, P-DIP, and LCC packages; θJA is specified for device
soldered in circuit board for SOIC package.
AMP04 Die Size 0.075 × 0.99 inch, 7,425 sq. mils.
Substrate (Die Backside) Is Connected to V+.
Transistor Count, 81.
ORDERING GUIDE
Model
AMP04EP
AMP04ES
AMP04FP
AMP04FS
AMP04FS-REEL
AMP04FS-REEL7
AMP04GBC
Temperature
Range
XIND
XIND
XIND
XIND
XIND
XIND
+25°C
VOS @ +5 V
TA = +25؇C
150 µV
150 µV
300 µV
300 µV
150 µV
150 µV
300 µV
Package
Description
Plastic DIP
SOIC
Plastic DIP
SOIC
SOIC
SOIC
Package
Option
N-8
SO-8
N-8
SO-8
SO-8
SO-8
REV. A
–5–
5 Page 
AMP04
not interact with one another. Calibration is simple and easy
with the NULL adjusted first, followed by SPAN adjust. The
entire circuit can be remotely placed, and powered from the
4-20 mA 2-wire loop.
4-20 mA Loop Receiver
At the receiving end of a 4-20 mA loop, the AMP04 makes a
convenient differential receiver to convert the current back to a
usable voltage (Figure 13). The 4-20 mA signal current passes
through a 100 Ω sense resistor. The voltage drop is differentially
amplified by the AMP04. The 4 mA offset is removed by the
offset correction circuit.
Single Supply Programmable Gain Instrumentation Amplifier
Combining with the single supply ADG221 quad analog switch,
the AMP04 makes a useful programmable gain amplifier that
can handle input and output signals at zero volts. Figure 15
shows the implementation. A logic low input to any of the gain
control ports will cause the gain to change by shorting a gain-
set resistor across AMP04’s Pins 1 and 8. Trimming is required
at higher gains to improve accuracy because the switch ON-
resistance becomes a more significant part of the gain-set
resistance. The gain of 500 setting has two switches connected
in parallel to reduce the switch resistance.
–
4–20mA
TRANS-
MITTER +
IN 4002
4–20mA
1k 3
4–20mA
100Ω 1%
1k
2
WIRE RE-
SISTANCE
+–
POWER
SUPPLY
+15V
100k
7
1
0.15µF
AMP-04
5
4
86
VOUT
0–1.6V FS
–0.400V
2
–15V
6
OP-177
3
27k
–15V
10k
–+
AD589
Figure 13. 4-to-20 mA Line Receiver
Low Power, Pulsed Load-Cell Amplifier
Figure 14 shows a 350 Ω load cell that is pulsed with a low duty
cycle to conserve power. The OP295’s rail-to-rail output capa-
bility allows a maximum voltage of 10 volts to be applied to the
bridge. The bridge voltage is selectively pulsed on when a mea-
surement is made. A negative-going pulse lasting 200 ms should
be applied to the MEASURE input. The long pulse width is
necessary to allow ample settling time for the long time constant
of the low-pass filter around the AMP04. A much faster settling
time can be achieved by omitting the filter capacitor.
330Ω
1/2
OP-295
+12V
1k
10k
10V
IN
OUT REF-01
GND
+5V TO +30V
+
10µF
0.1µF
GAIN OF 500
GAIN OF 100
GAIN OF 10
WR
–
INPUT
+
13
ADG221
10
9
5
4
11
200Ω
76
8 200Ω
15 14
16 715Ω
2 3 10.9k
1
12 100k
RG
1
RG
8
2 V+ 7
36
4 V–
REF 5
AMP-04
0.22µF
+5V
TO +30V VOUT
0.1µF
Figure 15. Single Supply Programmable Gain Instrumen-
tation Amplifier
The switch ON resistance is lower if the supply voltage is
12 volts or higher. Additionally the overall amplifier’s tempera-
ture coefficient also improves with higher supply voltage.
350Ω
2N3904
+12V
7
31
86
AMP-04
2
5
4
MEASURE
50k
1N4148
0.22µF
VOUT
Figure 14. Pulsed Load Cell Bridge Amplifier
REV. A
–11–
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AMP04.PDF ] | |
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