REF02CS Analog Devices Inc, REF02CS Datasheet - Page 17

• 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

BIPOLAR VOLTAGE REFERENCE
Many applications require both a positive and reference voltage
of the same magnitude. A simple method of generating such a
bipolar reference is shown in Figure 42.
In this configuration, the negative rail is generated simply
with an inverting amplifier with a gain of −1. A low offset
op amp should be used to minimize the voltage error at the
negative output.
U1
REF03
GND
V
V+
IN
2
V
4
OUT
Figure 42. Bipolar Voltage Reference
6
100kΩ
100kΩ
2
3
U2
OP97
V–
4
7
6
+2.5V
–2.5V
Rev. K | Page 17 of 20
ADJUSTABLE REFERENCE WITH POSITIVE AND
NEGATIVE SWING
The output voltage of the REF0x references can be readily
adjusted via a simple trim circuit (explained in the Output
Adjustment section). The circuit shown in Figure 43 extends
the negative range of adjustment beyond that obtainable with
the simple trim circuit by employing a precision op amp with
a potentiometer feeding the op amp’s noninverting input.
The voltage output from the op amp can be adjusted by
changing the value of the potentiometer: as shown, the op
amp outputs +2.5 V when the pot is pulled completely high,
and −2.5V when pulled completely low. In this configuration,
the load current is sourced by the op amp; therefore, a low
offset op amp with a current rating that meets or exceeds the
current requirements of the load should be used.
U1
REF03
GND
V
V+
IN
2
V
4
OUT
Figure 43. Negatively Adjustable Reference
6
50kΩ
50kΩ
50kΩ
2
3
REF01/REF02/REF03
OP97
V+
4
7
+15V
U2
6
V
–2.5V TO +2.5V
OUT