REF02CS Analog Devices Inc, REF02CS Datasheet - Page 12

• Manufacturer Part Number: REF02CS
• Description: IC VOLT REFERENCE PREC 5V 8SOIC
• Manufacturer: Analog Devices Inc

Specifications of REF02CS

• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Rohs Status: RoHS non-compliant
• Reference Type: Series
• Voltage - Output: 5V
• Tolerance: ±14%
• Temperature Coefficient: 65ppm/°C
• Voltage - Input: 7 ~ 40 V
• Number Of Channels: 1
• Current - Quiescent: 1.4mA
• Current - Output: 10mA
• Operating Temperature: -40°C ~ 85°C
• Peak Reflow Compatible (260 C): No
• Output Voltage: 5V
• Current Rating: 21A
• Output Voltage Max: 5V
• Leaded Process Compatible: No
• Fixed / Adjust / Prog: Precision
• Output Voltage (max): 5V
• Reference Voltage Accuracy (max): 1
• Line Regulation: 150ppm/V
• Load Regulation: 150ppm/mA
• Input Voltage (max): 40V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 8
• Package Type: SOIC N
• Current - Cathode: -
• Lead Free Status / Rohs Status: Not Compliant

REF02
PRECISION CURRENT SOURCE
A current source with 35 V output compliance and excellent
output impedance can be obtained using this circuit. REF02
keeps the line voltage and power dissipation constant in the
device; the only important error consideration at room
temperature is the negative supply rejection of the op amp. The
typical 3 µV/V PSRR of the OP02E creates a 20 ppm change
(3 µV/V × 35 V/5 V) in output current over a 25 V range. For
example, a 5 mA current source can be built (R = 1 kΩ) with
350 MΩ output impedance.
REF02
R
O
GND
V
1
=
IN
2
4
20
3
V
×
O
TEMP
10
35V
REF02
–6
6
Figure 22. Precision Current Source
GND
I
×
15V
V
OUT
5mA
IN
4
2
TRIM
Figure 23. Current Source
VOLTAGE COMPLIANCE: –25V TO +8V
V
R
C
O
6
6
6
5
V
O
REF02
OP02E
+50V
GND
4
–5V
V
2
IN
2
7
4
R
2
3
I
OUT
= +
C
5V
R
+ 1mA
R
(TRIM FOR
CALIBRATION)
I
O
=
5V
V
R
TO 25V
O
= 0V
Rev. I | Page 12 of 16
SUPPLY BYPASSING
For best results, it is recommended that the power supply pin be
bypassed with a 0.1 µF disc ceramic capacitor.
0.1µF
REF02
+15V
V
GND
+7.5V (±10%)
REF02HJ
IN
2
4
V
GND
3
O
V
IN
TEMP
5
2
4
6
REF02
V
O
GND
–15V
5kΩ
5kΩ
I
V
OUT
IN
6
1/2 OP04CK
4
5kΩ
2kΩ
2
TRIM
R4
Figure 25. DAC Reference
Figure 26. ±3 V Reference
Figure 24. Current Sink
MSB
+15V
V
B1 B2 B3 B4 B5 B6 B7 B8
R1
20kΩ
R2
13.3kΩ
O
V+
VOLTAGE COMPLIANCE: –9V TO +25V
5
6
–15V
–7.5V (±10%)
DAC08
V–
+7.5V
–7.5V
–7.5V
A2
A1
R
C
C
I
OUT
1/2 OP04CK
1kΩ
R3
V
LSB
LC
V
= +
O
l
l
O
O
(+) = +3V
5V
R
4
2
+ 1mA
V
O
(–) = –3V
OP02
+15V
–15V
5kΩ
E
O