MCP1501
High-Precision Buffered Voltage Reference
Features
• Maximum Temperature Coefficient: 50 ppm/°C
from -40°C to +125°C
• Initial Accuracy: 0.08% (± 0.82 mV on
MCP1501-10)
• Operating Temperature Range: -40 to +125°C
• Low Typical Operating Current: 140
μA
• Line Regulation: 50 ppm/V maximum
• Load Regulation: 40 ppm/mA maximum
• 8 Voltage variants available:
- 1.024V
- 1.250V
- 1.800V
- 2.048V
- 2.500V
- 3.000V
- 3.300V
- 4.096V
• Output Noise (0.1 Hz to 10 Hz): < 0.1 µV
P-P
Introduction
The MCP1501 is a buffered voltage reference capable
of sinking and sourcing 20 mA of current. The voltage
reference is a low-drift bandgap-based reference. The
bandgap uses chopper-based amplifiers, reducing the
drift to zero, providing high current output with no
degradation in performance.
The MCP1501 is available in the following packages:
• 6-Lead SOT-23
• 8-Lead SOIC
• 8-Lead 2 mm x 2 mm WDFN
Package Types
MCP1501
6-Lead SOT-23
OUT 1
GND 2
GND 3
6 V
DD
5 GND
4 SHDN
Applications
•
•
•
•
•
Precision Data Acquisition Systems
High-Resolution Data Converters
Medical Equipment Applications
Industrial Controls
Battery-Powered Devices
MCP1501
8-Lead SOIC
V
DD
1
NC
2
SHDN
3
GND
4
8
FEEDBACK
7
OUT
6
GND
5
GND
MCP1501
2x2 WDFN*
V
DD
GND
SHDN
GND
1
2
3
4
EP
9
8
7
6
5
FEEDBACK
OUT
GND
GND
*Includes Exposed Thermal Pad (EP). See
Table 3-1
2015-2016 Microchip Technology Inc.
DS20005474B-page 1
MCP1501
BLOCK DIAGRAM
V
DD
Σ
OUT
FEEDBACK
Shutdown
Circuitry
SHDN
GND
DS20005474B-page 2
2015-2016 Microchip Technology Inc.
MCP1501
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
(†)
V
DD
.............................................................................................................................................................................5.5V
Thermal Resistance (θ
JA
) for SOT-23-6.........................................................................................................+190.5°C/W
Thermal Resistance (θ
JA
) for SOIC-8 ............................................................................................................+149.5°C/W
DFN-8 Thermal Resistance............................................................................................................................+141.3°C/W
Maximum current into V
DD
pin ............................................................................................................................... 30 mA
Clamp current, I
K
(V
PIN
< 0 or V
PIN
> V
DD
)........................................................................................................... ±20 mA
Maximum output current sunk by OUTPUT pin ......................................................................................................30 mA
Maximum output current sourced by OUTPUT pin .................................................................................................30 mA
(HBM:CDM:MM)................................................................................................................................ (2 kV:±1.5 kV:200V)
† 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 operation listings of this specification is not implied. Exposure above maximum rating conditions for
extended periods may affect device reliability.
TABLE 1-1:
DC CHARACTERISTICS
Sym.
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
V
DD
V
POR
—
V
OUT
Min.
1.65
1.7
2.0
2.25
2.70
3.2
3.5
4.3
—
—
1.0230
1.2490
1.7985
2.0460
2.4980
2.9975
3.2975
4.0925
—
—
—
Typ.
—
—
—
—
—
—
—
—
1.45
0.8
1.024
1.250
1.800
2.048
2.500
3.000
3.300
4.096
10
—
—
Max.
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
—
—
1.0250
1.2510
1.8015
2.0500
2.5020
3.0025
3.3025
4.0995
50
50
40 ppm –
sink
70 ppm –
source
200
Units
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
ppm/C
ppm/V
V
DD(MIN)
< V
DD
< 5.5V
Conditions
MCP1501-10
MCP1501-12
MCP1501-18
MCP1501-20
MCP1501-25
MCP1501-30
MCP1501-33
MCP1501-40
Electrical Characteristics:
Unless otherwise specified, V
DD(MIN)
V
DD
5.5V at -40C
T
A
+125C.
Characteristic
Supply Voltage
Power-on-Reset
Release Voltage
Power-on-Reset
Rearm Voltage
Output Voltage MCP1501-10
MCP1501-12
MCP1501-18
MCP1501-20
MCP1501-25
MCP1501-30
MCP1501-33
MCP1501-40
Temperature
MCP1501-XX
Coefficient
Line
Regulation
Load
Regulation
T
C
V
OUT
/
V
IN
V
OUT
/
I
OUT
V
DD(MIN)
< V
DD
< 5.5V
ppm/mA V
DD(MIN)
< V
DD
< 5.5V
-5 mA < I
LOAD
< +5 mA
Dropout
Voltage
V
DO
—
—
mV
V
DD(MIN)
< V
DD
< 5.5V
-5 mA < I
LOAD
< +2 mA
2015-2016 Microchip Technology Inc.
DS20005474B-page 3
MCP1501
TABLE 1-1:
DC CHARACTERISTICS (CONTINUED)
Sym.
PSRR
Min.
Typ.
94 dB
Max.
Units
Conditions
1.024V option, V
IN
= 5.5V,
1 kHz at 100 mV
P-P
V
IN
= 5.5V
Refer to
Section 1.1.10
“Output Voltage
Hysteresis”
for additional
details on testing conditions.
0.1 Hz to 10 Hz, T
A
= +25C
10 Hz to 10 kHz, T
A
= +25C
0.1 Hz to 10 Hz, T
A
= +25C
10 Hz to 10 kHz, T
A
= +25C
0.1 Hz to 10 Hz, T
A
= +25C
10 Hz to 10 kHz, T
A
= +25C
T
A
= +25°C
2.048V option
No Load
No Load, T
A
= +25°C
T
A
= +25°C
Electrical Characteristics:
Unless otherwise specified, V
DD(MIN)
V
DD
5.5V at -40C
T
A
+125C.
Characteristic
Power Supply
Rejection
Ratio
Shutdown
Output Voltage
Hysteresis
V
IL
V
IH
∆V
OUT_HYST
1.35
3.80
300 µV
Output Noise
MCP1501-10
MCP1501-20
MCP1501-40
e
N
e
N
e
N
I
LOAD
I
DD
Maximum
Load Current
Supply
Current
Shutdown
Current
MCP1501-10
MCP1501-20
MCP1501-40
—
—
—
—
—
—
—
—
—
0.1
5
0.1
10
0.1
20
±20
140
—
205
185
185
—
—
—
—
—
—
—
550
350
µV
P-P
µV
P-P
µV
P-P
mA
µA
nA
I
SHDN
1.1
1.1.1
Terminology
OUTPUT VOLTAGE
EQUATION 1-1:
TC
OUTPUT
CALCULATION
Output voltage is the reference voltage that is available
on the output pin.
OUT MAX
–
OUT MIN
6
TC OUT = -------------------------------------------------------
10 ppm/
C
-
T
OUTNOM
Where:
OUT
MAX
= Maximum output voltage over the
temperature range
OUT
MIN
= Minimum output voltage over the
temperature range
OUT
NOM
= Average output voltage over the
temperature range
T
= Temperature range over which the
data was collected
1.1.2
INPUT VOLTAGE
The input voltage (V
IN
) is the range of voltage that can
be applied to the V
DD
pin and still have the device
produce the designated output voltage on the OUT pin.
1.1.3
TEMPERATURE COEFFICIENT
(TC
OUTPUT
)
The output temperature coefficient or voltage drift is a
measure of how much the output voltage will vary from
its initial value with changes in ambient temperature.
The value specified in the electrical specifications is
measured as shown in
Equation
.
1.1.4
DROPOUT VOLTAGE
The dropout voltage is related to Line Regulation and is
defined as the voltage difference between the input and
output where the output voltage under load is main-
tained to 1% of the typical output voltage.
Equation 1-2
is used to calculate the dropout voltage.
EQUATION 1-2:
V DROP = V IN
–
V OUT | IOUT = Cons tan t
DS20005474B-page 4
2015-2016 Microchip Technology Inc.
MCP1501
1.1.5
LINE REGULATION
An ideal voltage reference will maintain a constant
output voltage regardless of any changes to the input
voltage; however, when real devices are considered a
small error may be measured on the output when an
input voltage change occurs.
Line regulation is defined as the change in output
voltage (
V
OUT
) as a function of a change in input
voltage (
V
IN
) and expressed in percent as shown in
Equation 1-3.
As an example, if the MCP1501-20 is implemented in a
design and a 2 µV change in output voltage is
measured from a 250 mV change on the input then the
error in percent, ppm, percent/volt, and ppm/volt is
shown in
Equation 1-6 – Equation 1-9.
EQUATION 1-6:
V OUT
2
V
-
-------------------
100%
------------------
100%
= .0008%
250 mV
V IN
EQUATION 1-7:
V OUT
6
6
2
V
-
-------------------
10
------------------
10
= 8 ppm
VIN
250 mV
EQUATION 1-8:
V OUT
2
V
----------------
-
2.048V
%
-
--------------------
100% =
----------------------
100% = 0.000390625 ----
-
V
V IN
250 mV
EQUATION 1-3:
VOUT
-------------------
100% = % Line Regulation
-
V IN
Line regulation may also be expressed as %/V or in
ppm/V, as shown in
Equation 1-4
and
Equation 1-5,
respectively.
EQUATION 1-4:
V OUT
---------------------------------------
V OUT
NOM
%
--------------------------------------------
100% = ---- Line Regulation
-
-
VIN
V
EQUATION 1-9:
V OUT
2
V
----------------
-
2.048V
6
6
ppm
--------------------
10 =
----------------------
10 =
3.90625
-----------
-
-
V IN
V
250 mV
EQUATION 1-5:
V OUT
---------------------------------------
V OUT
NOM
6
ppm
--------------------------------------------
10 = ---------- Line Regulation
-
-
VIN
V
2015-2016 Microchip Technology Inc.
DS20005474B-page 5
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