MCP1525/41
2.5V and 4.096V Voltage References
Features
•
•
•
•
•
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Precision Voltage Reference
Output Voltages: 2.5V and 4.096V
Initial Accuracy: ±1% (max.)
Temperature Drift: ±50 ppm/°C (max.)
Output Current Drive: ±2 mA
Maximum Input Current: 100 µA @ +25°C (max.)
Packages: TO-92 and SOT-23-3
Industrial Temperature Range: -40°C to +85°C
Description
The Microchip Technology Inc. MCP1525/41 devices
are 2.5V and 4.096V precision voltage references that
use a combination of an advanced CMOS circuit
design and EPROM trimming to provide an initial
tolerance of ±1% (max.) and temperature stability of
±50 ppm/°C (max.). In addition to a low quiescent
current of 100 µA (max.) at 25°C, these devices offer a
clear advantage over the traditional Zener techniques
in terms of stability across time and temperature. The
output voltage is 2.5V for the MCP1525 and 4.096V for
the MCP1541. These devices are offered in SOT-23-3
and TO-92 packages, and are specified over the
industrial temperature range of -40°C to +85°C.
Applications
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Battery-powered Systems
Handheld Instruments
Instrumentation and Process Control
Test Equipment
Data Acquisition Systems
Communications Equipment
Medical Equipment
Precision Power supplies
8-bit, 10-bit, 12-bit A/D Converters (ADCs)
D/A Converters (DACs)
Temperature Drift
2.525
2.520
2.515
2.510
2.505
2.500
2.495
2.490
2.485
2.480
2.475
4.140
4.130
4.120
4.110
MCP1541
4.100
4.090
4.080
MCP1525
4.070
4.060
4.050
4.040
-50 -25 0
25 50 75 100
Ambient Temperature (°C)
MCP1525 Output Voltage
(V)
MCP1541 Output Voltage
(V)
Typical Application Circuit
V
DD
C
IN
0.1 µF
(optional)
V
REF
MCP1525
MCP1541
V
IN
V
SS
V
OUT
C
L
1 µF to 10 µF
Basic Configuration
Package Types
MCP1525
MCP1541
TO-92
MCP1525
MCP1541
SOT-23-3
V
IN
1
3 V
SS
V
OUT
2
123
V
OUT
V
SS
V
IN
2001-2012 Microchip Technology Inc.
DS21653C-page 1
MCP1525/41
1.0
ELECTRICAL
CHARACTERISTICS
† Notice:
Stresses above those listed under “Absolute
Maximum Ratings” may cause permanent damage to the
device. This is a stress rating only and functional operation of
the device at those or any other conditions above those
indicated in the operational listings of this specification is not
implied. Exposure to maximum rating conditions for extended
periods may affect device reliability.
Absolute Maximum Ratings †
V
IN
– V
SS
..........................................................................7.0V
Input Current (V
IN
) .......................................................20 mA
Output Current (V
OUT
) .............................................. ±20 mA
Continuous Power Dissipation (T
A
= 125°C)............. 140 mW
All Inputs and Outputs .....................V
SS
– 0.6V to V
IN
+ 1.0V
Storage Temperature.....................................-65°C to +150°C
Maximum Junction Temperature (T
J
) .......................... +125°C
ESD protection on all pins (HBM)
4
kV
DC ELECTRICAL SPECIFICATIONS
Electrical Characteristics:
Unless otherwise indicated, T
A
= +25°C, V
IN
= 5.0V, V
SS
= GND, I
OUT
= 0 mA and C
L
= 1 µF.
Parameter
Output
Output Voltage,
MCP1525
Output Voltage,
MCP1541
Output Voltage Drift
Long-Term Output Stability
Load Regulation
Sym
V
OUT
V
OUT
TCV
OUT
V
OUT
V
OUT
/I
OUT
V
OUT
/I
OUT
V
OUT
/I
OUT
V
OUT
/I
OUT
Min
2.475
4.055
—
—
—
—
—
—
—
—
—
—
—
Typ
2.5
4.096
27
2
0.5
0.6
—
—
115
±8
137
107
—
Max
2.525
4.137
50
—
1
1
1.3
1.3
—
—
—
300
350
Units
V
V
ppm/°C
ppm/hr
mV/mA
mV/mA
mV/mA
mV/mA
ppm
mA
mV
µV/V
µV/V
Conditions
2.7V
V
IN
5.5V
4.3V
V
IN
5.5V
T
A
= -40°C to 85°C
(Note 1)
Exposed 1008 hrs @ +125°C
(see Figure 1-1), measured @ +25°C
I
OUT
= 0 mA to -2 mA
I
OUT
= 0 mA to 2 mA
I
OUT
= 0 mA to -2 mA,
T
A
= -40°C to 85°C
I
OUT
= 0 mA to 2 mA,
T
A
= -40°C to 85°C
Note 2
T
A
= -40°C to 85°C, V
IN
= 5.5V
I
OUT
= 2 mA
V
IN
= 2.7V to 5.5V for
MCP1525,
V
IN
= 4.3V to 5.5V for
MCP1541
V
IN
= 2.7V to 5.5V for
MCP1525,
V
IN
= 4.3V to 5.5V for
MCP1541,
T
A
= -40°C to 85°C
T
A
= -40°C to 85°C
T
A
= -40°C to 85°C
No load
No load, T
A
= -40°C to 85°C
Output Voltage Hysteresis
Maximum Load Current
Input-to-Output
Dropout Voltage
Line Regulation
V
HYS
I
SC
V
DROP
V
OUT
/V
IN
V
OUT
/V
IN
Input
Input Voltage, MCP1525
Input Voltage, MCP1541
Input Current
Note 1:
2:
V
IN
V
IN
I
IN
I
IN
2.7
4.3
—
—
—
—
86
95
5.5
5.5
100
120
V
V
µA
µA
Output temperature coefficient is measured using a “box” method, where the +25°C output voltage is trimmed as close
to typical as possible. The 85°C output voltage is then again trimmed to zero out the tempco.
Output Voltage Hysteresis is defined as the change in output voltage measured at +25°C before and after cycling the
temperature to +85°C and -40°C; refer to
Section 1.1.10 “Output Voltage Hysteresis”.
DS21653C-page 2
2001-2012 Microchip Technology Inc.
MCP1525/41
AC ELECTRICAL SPECIFICATIONS
Electrical Characteristics:
Unless otherwise indicated, T
A
= +25°C, V
IN
= 5.0V, V
SS
= GND, I
OUT
= 0 mA and C
L
= 1 µF.
Parameter
AC Response
Bandwidth
Input Capacitor
Load Capacitor
Noise
MCP1525
Output Noise Voltage
MCP1541
Output Noise Voltage
Note 1:
2:
Sym
BW
C
IN
C
L
E
no
E
no
E
no
E
no
Min
—
—
1
—
—
—
—
Typ
100
0.1
—
90
500
145
700
Max
—
—
10
—
—
—
—
Units
kHz
µF
µF
µV
P-P
µV
P-P
µV
P-P
µV
P-P
Notes 1
Notes 2
Conditions
Input and Load Capacitors (see Figure 4-1)
0.1 Hz to 10 Hz
10 Hz to 10 kHz
0.1 Hz to 10 Hz
10 Hz to 10 kHz
The input capacitor is optional; Microchip recommends using a ceramic capacitor.
These parts are tested at both 1 µF and 10 µF to ensure proper operation over this range of load capacitors. A wider
range of load capacitor values has been characterized successfully, but is not tested in production.
TEMPERATURE SPECIFICATIONS
Electrical Characteristics:
Unless otherwise indicated, T
A
= +25°C, V
IN
= 5.0V and V
SS
= GND.
Parameter
Temperature Ranges
Specified Temperature Range
Operating Temperature Range
Storage Temperature Range
Thermal Package Resistances
Thermal Resistance, TO-92
Thermal Resistance, SOT-23-3
Note 1:
Sym
T
A
T
A
T
A
JA
JA
Min
-40
-40
-65
—
—
Typ
—
—
—
132
336
Max
+85
+125
+150
—
—
Units
°C
°C
°C
°C/W
°C/W
Note 1
Conditions
These voltage references operate over the Operating Temperature Range, but with reduced performance. In any case,
the internal Junction Temperature (T
J
) must not exceed the Absolute Maximum specification of +150°C.
1.1
1.1.1
Specification Descriptions and
Test Circuits
OUTPUT VOLTAGE
1.1.3
OUTPUT VOLTAGE DRIFT (TCV
OUT
)
Output voltage is the reference voltage that is available
on the output pin (V
OUT
).
The output temperature coefficient or voltage drift is a
measure of how much the output voltage (V
OUT
) will
vary from its initial value with changes in ambient
temperature. The value specified in the electrical
specifications is measured and equal to:
1.1.2
INPUT VOLTAGE
EQUATION 1-1:
V
OUT
V
NO M
TCV
O UT
=
------------------------------------
T
A
Where:
V
NOM
= 2.5V,
MCP1525
V
NOM
= 4.096V,
MCP1541
ppm
C
The input (operating) voltage is the range of voltage
that can be applied to the V
IN
pin and still have the
device produce the designated output voltage on the
V
OUT
pin.
2001-2012 Microchip Technology Inc.
DS21653C-page 3
MCP1525/41
1.1.4
DROPOUT VOLTAGE
1.1.9
LONG-TERM OUTPUT STABILITY
The dropout voltage of these devices is measured by
reducing V
IN
to the point where the output drops by 1%.
Under these conditions the dropout voltage is equal to:
The long-term output stability is measured by exposing
the devices to an ambient temperature of 125°C
(Figure 2-9) while configured in the circuit shown in
Figure 1-1. In this test, all electrical specifications of the
devices are measured periodically at +25°C.
V
IN
= 5.5V
by
ambient
MCP1525
MCP1541
V
IN
V
OUT
V
SS
C
L
1 µF
±2 mA
square wave
@ 10 Hz
R
L
EQUATION 1-2:
V
D RO P
=
V
IN
–
V
O UT
The dropout voltage is affected
temperature and load current.
In Figure 2-18, the dropout voltage is shown over a
negative and positive range of output current. For
currents above zero milliamps, the dropout voltage is
positive. In this case, the voltage reference is primarily
powered by V
IN
. With output currents below zero
milliamps, the dropout voltage is negative. As the
output current becomes more negative, the input
current (I
IN
) reduces. Under this condition, the output
current begins to provide the needed power to the
voltage reference.
FIGURE 1-1:
Configuration.
1.1.10
Dynamic Life Test
OUTPUT VOLTAGE HYSTERESIS
1.1.5
LINE REGULATION
Line regulation is a measure of the change in output
voltage (V
OUT
) as a function of a change in the input
voltage (V
IN
). This is expressed as
V
OUT
/V
IN
and is
measured in either µV/V or ppm. For example, a 1 µV
change in V
OUT
caused by a 500 mV change in V
IN
would net a
V
OUT
/V
IN
of 2 µV/V, or 2 ppm.
The output voltage hysteresis is a measure of the
output voltage error once the powered devices are
cycled over the entire operating temperature range.
The amount of hysteresis can be quantified by
measuring the change in the +25°C output voltage after
temperature excursions from +25°C to +85°C to +25°C
and also from +25°C to -40°C to +25°C.
1.1.6
LOAD REGULATION (V
OUT
/I
OUT
)
Load regulation is a measure of the change in the
output voltage (V
OUT
) as a function of the change in
output current (I
OUT
). Load regulation is usually
measured in mV/mA.
1.1.7
INPUT CURRENT
The input current (operating current) is the current that
sinks from V
IN
to V
SS
without a load current on the out-
put pin. This current is affected by temperature and the
output current.
1.1.8
INPUT VOLTAGE REJECTION
RATIO
The Input Voltage Rejection Ratio (IVRR) is a measure
of the change in output voltage versus the change in
input voltage over frequency, as shown in Figure 2-7.
The calculation used for this plot is:
EQUATION 1-3:
V
IN
IVRR
=
20 log
-------------
V
O UT
dB
DS21653C-page 4
2001-2012 Microchip Technology Inc.
MCP1525/41
2.0
Note:
TYPICAL PERFORMANCE CURVES
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note:
Unless otherwise indicated, T
A
= +25°C, V
IN
= 5.0V, V
SS
= GND, I
OUT
= 0 mA and C
L
= 1 µF.
2.525
2.520
2.515
2.510
2.505
2.500
2.495
2.490
2.485
2.480
2.475
4.140
4.130
4.120
4.110
MCP1541
4.100
4.090
4.080
MCP1525
4.070
4.060
4.050
4.040
-50 -25 0
25 50 75 100
Ambient Temperature (°C)
140
MCP1525 Output Voltage
(V)
MCP1541 Output Voltage
(V)
Line Regulation (µV/V)
120
100
80
60
40
20
0
-50
MCP1525
V
IN
= 2.7V to 5.5V
MCP1541
V
IN
= 4.3V to 5.5V
-25
0
25
50
75
Ambient Temperature (°C)
100
FIGURE 2-1:
Temperature.
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
Output Voltage vs. Ambient
FIGURE 2-4:
Temperature.
7
Output Impedance (:)
6
5
4
3
2
1
Line Regulation vs. Ambient
Load Regulation (mV/mA)
MCP1525 and MCP1541
MCP1525 and MCP1541
Source Current =
0 mA to 2 mA
I
OUT
= +2 mA
Sink Current =
0 mA to -2 mA
I
OUT
= -2 mA
-50
-25
0
25
50
75
Ambient Temperature (°C)
100
0
1
10
100
1k
10k
100k
1M
1.E+00 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06
Frequency (Hz)
FIGURE 2-2:
Load Regulation vs.
Ambient Temperature.
100
90
80
70
60
50
40
30
20
10
0
-50
-25
FIGURE 2-5:
Frequency.
Output Noise Voltage Density
(μV/Hz)
1,000
Output Impedance vs.
MCP1541
MCP1525
Input Current (µA)
MCP1541
100
MCP1525
10
1
0
25
50
75
Ambient Temperature (°C)
100
0.1
1
10
100
1k
Frequency (Hz)
10k
100k
FIGURE 2-3:
Temperature.
Input Current vs. Ambient
FIGURE 2-6:
Output Noise Voltage
Density vs. Frequency.
2001-2012 Microchip Technology Inc.
DS21653C-page 5
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