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REF03GPPMIN/a1669avai+2.5V Precision Voltage Reference
REF03GSAD ?N/a3avai+2.5V Precision Voltage Reference


REF03GP ,+2.5V Precision Voltage ReferenceGENERAL DESCRIPTION . +2.5 Volt Output ........................... "c0.6% Max The REF-03 precisi ..
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REF03GP-REF03GS
+2.5V Precision Voltage Reference
ANALOG
DEVICES
+2.5V Precision
Voltage Reference
FEATURES
. +2.5 Volt Output ........................... i0.6% Max
. Wide Input Voltage Range ................... 4.5V to 33V
. Supply Current ............................ 1.4mA Max
. Output Voltage Tempco .................. 50ppm/°C Max
0 Line Regulation .......................... 50ppm/V Max
0 Load Regulation ...................... 100ppm/mA Max
q Extended Industrial Temp Range ......... -40°C to +85°C
q Low Cost
q Available in Die Form
ORDERING INFORMATION
OPERATING
TEMPERATURE
PLASTIC PACKAGE RANGE
REFO3GP XIND
REF03GStt XIND
t Burn-in is available on commercial and industrial temperature range parts in
plastic DIP
tt For availability and burn-in information on so and PLCC packages, contact
your local sales office.
SIMPLIFIED SCHEMATIC
REF-03
GENERAL DESCRIPTION
The REF-03 precision voltage reference provides a stable +2.5V
output, with minimal change for variations in supply voltage,
ambient temperature or loading conditions. Single-supply
operation over an input voltage range of +4.5V to +33V with a
current drain of 1mA and good temperature stability is achieved
using an improved bandgap design. Primarily targeted at price-
sensitive applications, the REF-03 is available in plastic mini-
dips and surface-mountable small outline plastic packages. For
improved performance or -55''C/1250C operation, see the
REF-43 data sheet.
PIN CONNECTIONS
8-PIN PLASTIC DIP
(P-Suffix)
8-PIN so
(S-Suffix)
i H7 7
OINPUT
f r--E) OUTPUT
GROUND
REV. C
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, USA
Tel: 617/329-4700 Fax: 617/326-8703 wa: 710/394-6577
Telex: 924491 Cable: ANALOG NORWOODMASS
REF-U3
ABSOLUTE MAXIM UM RATINGS (Note 1)
Supply Voltage .................................................................. +40V
Output Short-Circuit Duration ..................................... Indefinite
Operating Temperature Range
REF-OSG (P,S) ........................................... -40°C to +85°C
Storage Temperature Range .. ..-65"C to +175°C
Junction Temperature Range ........................ -65''C to +175°C
Lead Temperature (Soldering, 10 sec) ......................... +300°C
PACKAGE TYPE l, (NOTE 2) lc UNITS
8-Pin Plastic DIP (P) 110 50 mm
8-Pin so (S) 160 44 °CNV
NOTES:
1. Absolute maximum ratings apply to both DICE and packaged parts, unless
otherwise noted.
2. ' is specified for worst case mounting conditions, i.e., B A is specified for
device in socket for P-DIP package; ' is specified for device soldered to
printed circuit board for SO package.
ELECTRICAL CHARACTERISTICS at VIN = +15V. -4ty'C S TA 5 +85°C, unless otherwise noted.
REF-MG
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Voltage V0 No Load 2.485 2 500 2.515 v
Output Voltage Tolerance No Load - 0.2 0.6 %
tt,',C,)t1ia,rcoeo,ient TCVO (Note 1) - 10 50 ppm/DC
Line Regulation . vm--- +4.5Vto +33v - - 20 50 ppm/V
- 0.002 0.005 %/V
Load Regulation IL: OmA to 10mA - _ 60 100 ppm/mA
- 0.006 0.010 %/mA
Load Current (Sourcing) IL 10 21 - mA
Load Current (Sinking) ls H) 3 -0.5 - Tn:
Short-Circuit Output Current lsc Output Shorted to Ground - 24 - mA
Ouiescent Supply Current lsy No Load - 1.0 1.4 mA
Turn-On Settling Time tON To t0.1% of Final Value - 5 - pM)
Output Voltage Noise enn-p 0.1Hz to 10Hz - 6 - sn/p-p
Output Adjustment Range AVTRIM RPOT =10kfl t6 - 11 - %
Input Voltage Range 4.5 15 33 V
Temperature Voltage Output v, (Note 2) - 620 - mV
NOTES:
l, TCVO is measured by the endpoint method,
and is equal to
BURN-IN CIRCUIT
V(85°C) - V(-400C)
(2.5 x10'6) (125°C)
in ppm/°C.
2. Limit current in or out of pin 310 SOnA and capacitance on pin 3to 30pF.
OUTPUT VOLTAGE TRIM METHOD
REV. C
REF-03
DICE CHARACTERISTICS
. TEMP
. GROUND
. TRIM
DIE SIZE 0.048 X 0.074 inch, 3552 sq. mils
(1.22 X 1.88 mm, 2.29 sq. mm)
WAFER TEST LIMITS at V,N = +15V, TA = 25°C.
REF-03G
PARAMETER SYMBOL CONDITIONS LIMIT UNITS
2.500 $0.015 V MAX
t t V Ita T I V I = 0
Ou pu o ge o erance 0 L 0.6 % MAX
_ T 50 ppm/V MAX
= +4. Vt +33
Line Regulation VIN 5 0 V 0005 % MAX
Output Adjust Range VTRIM Rp=10kn t6 % MIN
Quiescent Supply Current ISY No Load 1.4 mA MAX
Electrical tests are performed at wafer probe to the limits shown. Due to variations in assembly methods and normal yield loss, yield after packaging is not
guaranteed for standard product dice. Consult factory to negotiate specifications based on dice lot qualification through sample lot assembly and testing,
TYPICAL PERFORMANCE CHARACTERISTICS
MAXIMUM LOAD CURRENT
" INPUT VOLTAGE
Ta = 25''C
D r \-
4 8 12 16 20 24 28 32
INPUT VOLTAGE (VOLTS)
LOAD REGULATION
(AIL =10mA)
vs INPUT VOLTAGE
7.225%:
5 so '
Sh "s,
a "s,,
t 55 "s,
O 50 R
4 B 12 16 20 24 28
INPUT VOLTAGE (VOLTS)
LINE REGULATION
" INPUT VOLTAGE
Ta-- 25°C
LINE REGULATION (ppm/V)
12 16 20 24 "
INPUT VOLTAGE (VOLTS)
REF-03
TYPICAL PERFORMANCE CHARACTERISTICS
NORMALIZED
LINE REGULATION
MAXIMUM LOAD CURRENT (4.5V TO 33V) t2UIESCENT CURRENT
vs TEMPERATURE " TEMPERATURE " TEMPERATURE
35 , 1.2 1.2
vm=115v vmi IW l
25 ' - d 1.1 11 % a
LINE REG (T)/LINE REG (25°C)
OUIESCENT CURRENT (mA)
MAXIMUM LOAD CURRENT (mA)
IO g ,,w"'''
I 0.9 0.9 I
o l 0.3 0.5 J I l
40 20 a 20 40 so an 100 -40 -20 0 20 no so " 100 -40 -20 o 20 40 60 M 100
TEMPERATURE CCI TEMPERATURE CC) TEMPERATURE CC)
WIDEBAND OUTPUT NOISE
NORMALIZED LOAD vs BANDWIDTH
LINE REGULATION REGULATION (AIL =10mA) (0.1 Hz TO FREQUENCY
vs FREQUENCY vs TEMPERATURE INDICATED)
92 l 1 1 rlll H 1 _ 10 1.4 1000
1 / 1 f H li 1 i , VIN =15V TA _ 25''C
" F .. F w» ._ \ I H- _ 32 A 1.3 Pm--itw
1 [ 1 A g
a 72 l / [ m- 1 . . " 100 E g 1.2 "h i
s 1 1 w ' a g g' 100
s 1 1 I 1 1 ; = 1.t a
F- 62 1 Wm ; 320 o 3 g
, I ' l I I _ E S 1o 6
D .1 = 2
g 52 ( - ' _ , 1000 a t. -
, l [ E g 0.9 g 10
g 42 1 3200 'li E M 8
32 Wu: 25°C - 10,000 0.7
Vm = 15it k
22 } HJIIlh 32,000 0.6 [ 1
10 100 " 10k 100k 1M -4t -20 o 20 no so an 100 1a 100 " 10k 100k 1M
FREQUENCY(Hz) TEMPERATURE (°C) FREQUENCY (m)
TYPICAL DISTRIBUTION
TYPICAL DISTRIBUTION OF OUTPUT
OF OUTPUT VOLTAGE NOISE VOLTAGE TEMPCO
b = 25°C
VIN = 15V
0.1M: TO 10H:
-40''C s as +as°c
vIN = 15V
3.2 5.9 " " -30 15 0 15 30 45
OUYPUT VOLTAGE NOISE (“VP-D) OUTPUT VOLTAGE TEMPCO (ppm/°C)
-4- REV C
REF-03
APPLICATIONS INFORMATION
The REF-OS provides a stable +2.5V output voltage with min-
imal dependence on load current, line voltage or tempera-
ture. This voltage is typically used to set an absolute refer-
ence point in data conversion circuits, or in analog circuits
such as log amps, 4-20mA transmitters and power supplies.
The REF-03 is of particular value in systems requiring a
precision reference using a single +5V supply rail.
Because an onboard operational amplifier is used to amplify
the basic bandgap cell voltage to 2.5V, supply decoupling is
critical to the transient performance of a voltage reference.
The supply line should be bypassed with a 10F tantalum
capacitor in parallel with a 0.01PF to 0.1pF ceramic capacitor
for best results as shown in Figure 1. For less critical condi-
tions, a single 0.1;4F capacitor is adequate. The bypass
capacitors should be located as close to the reference as
possible. Inadequate bypassing can lead to instabilities.
Output bypass capacitors are not generally recommended. If
necessary for high-frequency output impedance reduction,
the capacitance value used should be at least 1pF.
FIGURE 1: Basic Connections
---0-+-
0.1ssF
I-HI--
REF-03 vOUT "--ovou, +2.5v
GENERATING AN ADJUSTABLE BIPOLAR
VOLTAGE REFERENCE
Many times, there is a requirement for an adjustable bipolar
reference. A simple method of generating such a reference is
to connect the output of the REF-03 to an op amp in an
adjustable gain configuration as shown in Figure 2. Thetrim-
able resistor is then used to generate the desired output
voltage from -2SV to +2.51/.
GENERATING A -2.5V REFERENCE
Often, there is a requirement for a negative reference voltage.
The simplest method of generating a -2.5V reference with the
REF-03 is to connect an op amp in a gain of -1 to the output,
as shown in Figure 3. This provides both positive and nega-
tive 2.5V references. Figure 4 shows another method of
obtaining a negative reference, in which the current-output
element is a PNP transistor, with the REF-03 in a servo loop to
ensure that the output remains 2.5V below ground.
REV. C
FIGURE 2: Adjustable Bipolar Reference
. O Vow
-2SV TO m2.5V
>6-w-o 15v
REF-03 vOUT
'-:, -22iV
2N2905
A 6.2V
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