OP113ES Analog Devices Inc, OP113ES Datasheet - Page 15

• Manufacturer Part Number: OP113ES
• Description: IC OPAMP GP 3.4MHZ LN 40MA 8SOIC
• Manufacturer: Analog Devices Inc

Specifications of OP113ES

• Slew Rate: 1.2 V/µs
• Amplifier Type: General Purpose
• Mounting Type: Surface Mount
• Rohs Status: RoHS non-compliant
• Number Of Circuits: 1
• Gain Bandwidth Product: 3.4MHz
• Current - Input Bias: 240nA
• Voltage - Input Offset: 75µV
• Current - Supply: 3mA
• Current - Output / Channel: 40mA
• Voltage - Supply, Single/dual (±): 4 V ~ 36 V, ±2 V ~ 18 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (3.9mm Width)
• No. Of Amplifiers: 1
• Bandwidth: 3.4MHz
• No. Of Pins: 8
• Peak Reflow Compatible (260 C): No
• Input Bias Current: 1.2nA
• Output Type: -
• -3db Bandwidth: -
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

10µF
To calibrate the circuit, first immerse the RTD in a 0°C ice bath
or substitute an exact 100 Ω resistor in place of the RTD. Adjust
the zero adjust potentiometer for a 0 V output, and then set R9,
linearity adjust potentiometer, to the middle of its adjustment
range. Substitute a 280.9 Ω resistor (equivalent to 500°C) in
place of the RTD, and adjust the full-scale adjust potentiometer
for a full-scale voltage of 5 V.
To calibrate out the nonlinearity, substitute a 194.07 Ω resistor
(equivalent to 250°C) in place of the RTD, and then adjust the
linearity adjust potentiometer for a 2.5 V output. Check and
readjust the full-scale and half-scale as needed.
Once calibrated, the amplifier outputs a 10 mV/°C temperature
coefficient with an accuracy better than ±0.5°C over an RTD
measurement range of −150°C to +500°C. Indeed the amplifier
can be calibrated to a higher temperature range, up to 850°C.
A HIGH ACCURACY THERMOCOUPLE AMPLIFIER
Figure 44 shows a popular K-type thermocouple amplifier with
cold-junction compensation. Operating from a single 12 V
supply, the OPx13 family’s low noise allows temperature
measurement to better than 0.02°C resolution over a 0°C to
1000°C range. The cold-junction error is corrected by using an
inexpensive silicon diode as a temperature measuring device.
It should be placed as close to the two terminating junctions as
physically possible. An aluminum block might serve well as an
isothermal system.
100Ω
RTD
11
12
13
4
6
+
–15V
7
AD588BQ
16
9
+15V
8
2
R
R
R
10
W1
W2
W3
14
15
1
3
Figure 43. Ultraprecision RTD Amplifier
R1
8.25kΩ
50Ω
R3
2
3
+
–
A1
OP213
R2
8.25kΩ
R4
100Ω
1/2
R
G
1
FULL SCALE ADJUST
4.02kΩ
6
5
R5
–
+
A2
+15V
–15V
8
4
100Ω
OP213
49.9kΩ
R7
R8
1/2
7
R9
5kΩ
LINEARITY
ADJUST
@1/2 FS
V
–1.5V = –150°C
+5V = +500°C
OUT
(10mV/°C)
Rev. F | Page 15 of 24
THERMOCOUPLE
R6 should be adjusted for a 0 V output with the thermocouple
measuring tip immersed in a 0°C ice bath. When calibrating, be
sure to adjust R6 initially to cause the output to swing in the
positive direction first. Then back off in the negative direction
until the output just stops changing.
AN ULTRALOW NOISE, SINGLE SUPPLY
INSTRUMENTATION AMPLIFIER
Extremely low noise instrumentation amplifiers can be built
using the OPx13 family. Such an amplifier that operates from a
single supply is shown in Figure 45. Resistors R1 to R5 should
be of high precision and low drift type to maximize CMRR
performance. Although the two inputs are capable of operating
to 0 V, the gain of −100 configuration limits the amplifier input
common-mode voltage to 0.33 V.
SUPPLY SPLITTER CIRCUIT
The OPx13 family has excellent frequency response
characteristics that make it an ideal pseudoground reference
generator, as shown in Figure 46. The OPx13 family serves as a
voltage follower buffer. In addition, it drives a large capacitor
that serves as a charge reservoir to minimize transient load
changes, as well as a low impedance output device at high
frequencies. The circuit easily supplies 25 mA load current with
good settling characteristics.
Figure 45. Ultralow Noise, Single Supply Instrumentation Amplifier
40.7µV/°C
+
–
*ALL RESISTORS ±0.1%, ±25ppm/°C.
K-TYPE
V
0.1µF
12V
IN
Figure 44. Accurate K-Type Thermocouple Amplifier
+
10kΩ
*R1
2
–
+
REF02EZ
–
+
4
5.62kΩ
1N4148
D1
OP213
+
–
R4
1/2
6
10kΩ
*R2
(200Ω + 12.7Ω)
5V
R1
10.7kΩ
R2
2.74kΩ
R3
53.6Ω
200Ω
OP113/OP213/OP413
R6
*R
10kΩ
G
*R3
R5
40.2kΩ
453Ω
R8
5V TO 36V
OP213
124kΩ
+
–
R9
2
3
1/2
10kΩ
OP213
*R4
GAIN =
+
–
1/2
12V
8
4
0.1µF
10µF
+
+
20kΩ
R
1
0V TO 10V
(0°C TO 1000°C)
G
V
OUT
+ 6