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4.9V LOW POWER PRECISION REFERENCE SOURCE
Description
The ZRT050 is a monolithic integrated circuit providing a
precise stable reference voltage of 4.9V at 500μA.
The circuit features a knee current of 150μA and operation
over a wide range of temperatures and currents.
The ZRT050 is available in a SOT223 package for surface
mount applications. This device offers a trim facility whereby
the output voltage can be adjusted as shown in the
schematic diagram. This facility is used when compensating
for system errors or setting the reference output to a
particular value. When the trim facility is not used, the pin
should be left open circuit.
Features
• Trimmable output
• Excellent temperature stability
• Low output noise figure
• -40 to 85°C operating temperature range
• 1% initial voltage tolerance
• No external stabilizing capacitor required in most cases
• Low slope resistance
• No derating required at low temperatures
• SOT223 small outline package
Pin Assignments
T
RIM
GND
V
R
(Pin 4 floating or
connected to pin 2)
SOT223
1
2
3
Top View
ZRT050
4
Schematic Diagram
This circuit will allow the reference to be trimmed over a wide range. The device is specified over a ±5% trim range.
ZRT050
Document number: DS33259 Rev. 4 - 2
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ZRT050
4.9V LOW POWER PRECISION REFERENCE SOURCE
Absolute Maximum Ratings
Parameter Symbol Value Unit
Reverse Current (Note 1) 60 mA
Operating Temperature: C grade T
Storage Temperature T
Notes: 1. Above 72°C this figure should be linearly derated to 15mA @ 125°C
OMP
-55 to +150 °C
STG
Power Dissipation (@T
= 25°C unless otherwise stated)
amb
Package Value Unit
SOT223 2 W
Temperature Dependent Electrical Characteristics
Symbol Parameter
ΔVR
TCVR
Output voltage change over operating temperature
range
Output voltage temperature coefficient
(see Note B)
Electrical Characteristics (@T
Symbol Parameter Conditions Min. Typ. Max. Unit
VR
V
TRIM
TCV
TRIM
IR Operating current range (See Note C) 0.15 60 mA
ton
t
off
e
np-p
RS Slope resistance (see Note D) IR = 0.5mA to 5mA 1.25 2.0 Ω
Output voltage:
1% tolerance
Output voltage adjustment range RT = 100kΩ ±5 %
Change in TCVR with output adjustment 2.5 ppm/°C
Turn-on time
Turn-off time
Output voltage noise
(over the range 0.1 to 10Hz)
= 25°C unless otherwise stated)
amb
Peak to peak
measurement
-40 to +85 °C
Grade C
-40 to 85°C
Typ. Max.
5.4 17.2 mV
15.0 50.0 ppm/°C
IR = 500 µA 4.85 4.90 4.95 V
RL = 1kΩ
50 µV
100
0.3
µs
Unit
ZRT050
Document number: DS33259 Rev. 4 - 2
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Typical Characteristics
ZRT050
4.9V LOW POWER PRECISION REFERENCE SOURCE
(a) Output change with temperature
The absolute maximum difference between the maximum
output voltage and the minimum output voltage over the
specified temperature range:
ΔV
R=VMAX
(b) Output temperature coefficient (T
The ratio of the output change with temperature to the
specified temperature range expressed in ppm/°C:
ΔT= Full temperature range
(c) Operating current (I
Maximum operating current must be derated as indicated in
maximum ratings.
)
R
ZRT050
Document number: DS33259 Rev. 4 - 2
- V
MIN
)
CVR
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(d) Slope resistance (RS)
The slope resistance is defined as:
(e) Line regulation
The ratio of change in output voltage to the change in
input voltage producing it:
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4.9V LOW POWER PRECISION REFERENCE SOURCE
Ordering Information
Device Tol %
ZRT050GC1 1 -40 to +85°C ZRT050C1 7” 12mm 1000
Operating
Temperature
Part Mark
Reel
Size
Package Outline Dimensions (All Dimensions in mm)
SOT223
Tape
Width
ZRT050
Quantity
Per Reel
DIM
A - 1.80 - 0.071 e 2.30 BSC 0.0905 BSC
A1 0.02 0.10 0.0008 0.004 e1 4.60 BSC 0.181 BSC
b 0.66 0.84 0.026 0.033 E 6.70 7.30 0.264 0.287
b2 2.90 3.10 0.114 0.122 E1 3.30 3.70 0.130 0.146
C 0.23 0.33 0.009 0.013 L 0.90 - 0.355 D 6.30 6.70 0.248 0.264 - - - - -
Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches.
ZRT050
Document number: DS33259 Rev. 4 - 2
Millimeters Inches
Min Max Min Max Min Max Min Max
DIM
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Millimeters Inches
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ZRT050
4.9V LOW POWER PRECISION REFERENCE SOURCE
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ZRT050
Document number: DS33259 Rev. 4 - 2
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