MCP1541-I/TO Microchip Technology, MCP1541-I/TO Datasheet - Page 10

• Manufacturer Part Number: MCP1541-I/TO
• Description: IC VOLTAGE REFRNCE 4.096V TO92-3
• Manufacturer: Microchip Technology

Specifications of MCP1541-I/TO

• Reference Type: Series
• Package / Case: TO-92-3 (Standard Body), TO-226
• Voltage - Output: 4.096V
• Tolerance: ±1%
• Temperature Coefficient: 50ppm/°C
• Voltage - Input: 4.3 ~ 5.5 V
• Number Of Channels: 1
• Current - Quiescent: 100µA
• Current - Output: 2mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Product: Voltage References
• Topology: Series References
• Output Voltage: 4.096 V
• Initial Accuracy: 1 %
• Average Temperature Coefficient (typ): 50 ppm/C
• Series Vref - Input Voltage (max): 7 V
• Series Vref - Input Voltage (min): 4.3 V
• Shunt Current (max): 8 mA (Typ)
• Maximum Operating Temperature: + 85 C
• Input Voltage: 5.5 V
• Minimum Operating Temperature: - 40 C
• Mounting Style: Through Hole
• Series Vref - Supply Current (max): 100 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Cathode: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: MCP1541I/TO

MCP1525/41
4.2
4.2.1
A negative precision voltage reference can be
generated by using the MCP1525 or MCP1541 in the
configuration shown in Figure 4-3.
FIGURE 4-3:
Reference.
In this circuit, the voltage inversion is implemented
using the MCP606 and two equal resistors. The voltage
at the output of the MCP1525 or MCP1541 voltage
reference drives R
input of the MCP606 amplifier. Since the non-inverting
input of the amplifier is biased to ground, the inverting
input will also be close to ground potential. The second
10 k
the amplifier. Since the inverting input of the amplifier is
high-impedance, the current generated through R
also flow through R
voltage of the amplifier is equal to -2.5V for the
MCP1525 and -4.1V for the MCP1541.
DS21653B-page 10
V
DD
resistor is placed around the feedback loop of
V
V
V
Typical Application Circuits
OUT
= 5.0V
SS
IN
MCP1525
MCP1541
NEGATIVE VOLTAGE REFERENCE
V
V
REF
REF
1
= -2.5V, MCP1525
, which is connected to the inverting
= -4.096V, MCP1541
2
C
10 µF
. As a consequence, the output
10 k
0.1%
L
Negative Voltage
R
MCP606
1
V
SS
10 k
= - 5.0V
0.1%
R
2
V
REF
1
will
4.2.2
The MCP1525 and MCP1541 were carefully designed
to provide a voltage reference for Microchip’s 10-bit
and 12-bit families of ADCs. The circuit shown in
Figure 4-4 shows a MCP1541 configured to provide the
reference to the MCP3201, a 12-bit ADC.
FIGURE 4-4:
V
IN
0.1 µF
C
A/D CONVERTER REFERENCE
IN
V
V
V
IN+
IN–
OUT
SS
IN
V
REF
MCP3201
ADC Reference Circuit.
© 2005 Microchip Technology Inc.
10 µF
C
L
3
V
DD
to PICmicro
Microcontroller
0.1 µF
10 µF
= 5.0V
®