REF102AP [BB]
IC ; IC内部から
| 型号： | REF102AP |
| 厂家： | 
BURR-BROWN CORPORATION |
| 描述： | IC
|
| 文件： | 总9页 (文件大小：184K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
REF102
REF102
REF102
Precision
VOLTAGE REFERENCE
FEATURES
APPLICATIONS
● +10V ±0.0025V OUTPUT
● PRECISION-CALIBRATED VOLTAGE
STANDARD
● VERY LOW DRIFT: 2.5ppm/°C max
● D/A AND A/D CONVERTER REFERENCE
● PRECISION CURRENT REFERENCE
● EXCELLENT STABILITY:
5ppm/1000hr typ
● EXCELLENT LINE REGULATION:
● ACCURATE COMPARATOR THRESHOLD
1ppm/V max
REFERENCE
● EXCELLENT LOAD REGULATION:
● DIGITAL VOLTMETERS
● TEST EQUIPMENT
10ppm/mA max
● LOW NOISE: 5µVp-p typ, 0.1Hz to 10Hz
● WIDE SUPPLY RANGE: 11.4VDC to 36VDC
● LOW QUIESCENT CURRENT: 1.4mA max
● PC-BASED INSTRUMENTATION
● PACKAGE OPTIONS: HERMETIC TO-99,
PLASTIC DIP, SOIC
V+
Trim
5
2
DESCRIPTION
The REF102 is a precision 10V voltage reference. The
drift is laser-trimmed to 2.5ppm/°C max (CM grade)
over the industrial temperature range and 5ppm/°C
max (SM grade) over the military temperature range.
The REF102 achieves its precision without a heater.
This results in low power, fast warm-up, excellent
stability, and low noise. The output voltage is ex-
tremely insensitive to both line and load variations and
can be externally adjusted with minimal effect on drift
and stability. Single supply operation from 11.4V to
36V and excellent overall specifications make the
REF102 an ideal choice for demanding instrumenta-
tion and system reference applications.
R5
50kΩ
R2
R3
14kΩ
22kΩ
8kΩ
R1
–
+
6
A1
VOUT
R6
7kΩ
R4
DZ1
4kΩ
8
4
Noise Common
Reduction
International Airport Industrial Park
•
Mailing Address: PO Box 11400, Tucson, AZ 85734
FAXLine: (800) 548-6133 (US/Canada Only)
• Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/
•
•
Cable: BBRCORP
•
Telex: 066-6491
•
FAX: (520) 889-1510
•
Immediate Product Info: (800) 548-6132
©1989 Burr-Brown Corporation
PDS-900E
Printed in U.S.A. October, 1993
SPECIFICATIONS
ELECTRICAL
At TA = +25°C and VS = +15V power supply, unless otherwise noted.
REF102A, R
REF102B, S
TYP
REF102C, M
TYP
PARAMETER
CONDITIONS
A = 25°C
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNITS
OUTPUT VOLTAGE
Initial
vs Temperature (1)
vs Supply
T
9.99
10.01
10
9.995
10.005
5
9.9975
10.0025
2.5
V
ppm/°C
(Line Regulation)
vs Output Current
(Load Regulation)
V
S = 11.4V to 36V
2
1
1
ppm/V
I
L = 0mA to +10mA
L = 0mA to –5mA
A = 25°
20
40
10
20
10
20
ppm/mA
ppm/mA
I
vs Time
T
M Package
5
20
✻
✻
✻
ppm/1000hr
ppm/1000hr
P, U Packages (2)
Trim Range (3)
Capacitive Load, max
±3
✻
✻
%
pF
1000
5
✻
✻
✻
✻
NOISE
(0.1Hz to 10Hz)
µVp-p
OUTPUT CURRENT
+10, –5
+11.4
✻
✻
✻
✻
mA
INPUT VOLTAGE
RANGE
+36
✻
✻
✻
✻
V
QUIESCENT CURRENT
WARM-UP TIME (4)
(IOUT = 0)
(To 0.1%)
+1.4
mA
µs
15
✻
✻
TEMPERATURE
RANGE
Specification
REF102A, B, C
REF102R, S
–25
–55
+85
+125
✻
✻
✻
✻
✻
✻
°C
°C
✻ Specifications same as REF102A/R.
NOTES: (1)The“box”methodisusedtospecifyoutputvoltagedriftvstemperature. SeetheDiscussionofPerformancesection. (2)Typically5ppm/1000hrsafter168hr
powered stabilization. (3) Trimming the offset voltage affects drift slightly. See Installation and Operating Instructions for details. (4) With noise reduction pin floating.
See Typical Performance Curves for details.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
®
2
REF102
ORDERING INFORMATION
TEMPERATURE
RANGE
MAX INITIAL
ERROR (mV)
MAX DRIFT
(ppm/°C)
PRODUCT
PACKAGE
REF102AU
REF102AP
REF102BP
REF102AM
REF102BM
REF102CM
REF102RM
REF102SM
8-Pin SOIC
8-Pin Plastic DIP
8-Pin Plastic DIP
Metal TO-99
Metal TO-99
Metal TO-99
–25°C to +85°C
–25°C to +85°C
–25°C to +85°C
–25°C to +85°C
–25°C to +85°C
–25°C to +85°C
–55°C to +125°C
–55°C to +125°C
±10
±10
±5
±10
±5
±2.5
±10
±5
±10
±10
±5
±10
±5
±2.5
±10
±5
Metal TO-99
Metal TO-99
PIN CONFIGURATIONS
ABSOLUTE MAXIMUM RATINGS
Input Voltage ...................................................................................... +40V
Operating Temperature
P,U .................................................................................. –25°C to +85°C
M ................................................................................... –55°C to +125°C
Storage Temperature Range
P,U .................................................................................. –40°C to +85°C
M ................................................................................... –65°C to +150°C
Lead Temperature (soldering, 10s)................................................ +300°C
(SOIC, 3s) ....................................................... +260°C
Top View
DIP/SOIC
Noise Reduction
NC
V+
1
2
3
4
8
7
6
5
NC
NC
VOUT
Trim
Com
Short-Circuit Protection to Common or V+............................... Continuous
Top View
TO-99
Noise Reduction
PACKAGE INFORMATION
8
NC
NC
PACKAGE DRAWING
1
3
7
5
PRODUCT
PACKAGE
NUMBER(1)
2
6
V+
NC
VOUT
Trim
REF102AU
REF102AP
REF102BP
REF102AM
REF102BM
REF102CM
REF102RM
REF102SM
8-Pin SOIC
8-Pin Plastic DIP
8-Pin Plastic DIP
Metal-TO-99
Metal-TO-99
Metal-TO-99
182
006
006
001
001
001
001
001
4
Common
Metal-TO-99
Metal-TO-99
ELECTROSTATIC
DISCHARGE SENSITIVITY
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
®
3
REF102
TYPICAL PERFORMANCE CURVES
At TA = +25°C, VS = +15V, unless otherwise noted.
POWER TURN-ON RESPONSE
POWER TURN-ON RESPONSE with 1µF Cn
V
V
OUT
OUT
VIN
VIN
Time (10ms/div)
Power Turn-On
Time (5µs/div)
Power Turn-On
POWER SUPPLY REJECTION vs FREQUENCY
130
LOAD REGULATION
+1.5
120
110
100
90
+1.0
+0.5
0
–0.5
–1.0
–1.5
80
70
60
–5
0
+5
+10
1
100
Frequency (Hz)
1k
10k
Output Current (mA)
QUIESCENT CURRENT vs TEMPERATURE
RESPONSE TO THERMAL SHOCK
+600
+300
0
1.6
1.4
1.2
1.0
0.8
–300
REF102CM Immersed in +85°C Fluorinert Bath
TA = +85°C
TA
+25°C
–600
=
0
15
30
45
60
–75
–50 –25
0
+25
+50
+75 +100 +125
Temperature (°C)
Time (s)
®
4
REF102
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, VS = +15V, unless otherwise noted.
TYPICAL REF102 REFERENCE NOISE
20Ω
2kΩ
6
4
Oscilloscope
2
–
8KΩ
100µF
OPA27
0
+
DUT
2µF
–2
–4
–6
15.8kΩ
Gain = 100V/V
f–3dB = 0.1Hz and 10Hz
Noise Test Circuit.
Low Frequency Noise (1s /div)
(See Noise Test Circuit)
®
5
REF102
THEORY OF OPERATION
INSTALLATION AND
Refer to the diagram on the first page of this data sheet. The
10V output is derived from a compensated buried zener
diode DZ1, op amp A1, and resistor network R1–R6.
OPERATING INSTRUCTIONS
BASIC CIRCUIT CONNECTION
Figure 2 shows the proper connection of the REF102. To
achieve the specified performance, pay careful attention to
layout. A low resistance star configuration will reduce volt-
age errors, noise pickup, and noise coupled from the power
supply. Commons should be connected as indicated being
sure to minimize interconnection resistances.
Approximately 8.2V is applied to the non-inverting input of
A1 by DZ1. R1, R2, and R3 are laser-trimmed to produce an
exact 10V output. The zener bias current is established from
the regulated output voltage through R4. R5 allows user-
trimming of the output voltage by providing for small
external adjustment of the amplifier gain. Because the TCR
of R5 closely matches the TCR of R1, R2 and R3 , the voltage
trim has minimal effect on the reference drift. The output
voltage noise of the REF102 is dominated by the noise of the
zener diode. A capacitor can be connected between the
Noise Reduction pin and ground to form a low-pass filter
with R6 and roll off the high-frequency noise of the zener.
(1)
2
(2)
V+
6
+
1µF
Tantalum
REF102
RL 1
RL 2
RL 3
DISCUSSION
4
OF PERFORMANCE
(1)
(2)
The REF102 is designed for applications requiring a preci-
sion voltage reference where both the initial value at room
temperature and the drift over temperature are of importance
to the user. Two basic methods of specifying voltage refer-
ence drift versus temperature are in common usage in the
industry—the “butterfly method” and the “box method.”
The REF102 is specified with the more commonly used
“box method.” The “box” is formed by the high and low
specification temperatures and a diagonal, the slope of
which is equal to the maximum specified drift.
NOTES: (1) Lead resistances here of up to a few ohms have negligible
effect on performance. (2) A resistance of 0.1Ω in series with these
leads will cause a 1mV error when the load current is at its maximum of
10mA. This results in a 0.01% error of 10V.
FIGURE 2. REF102 Installation.
OPTIONAL OUTPUT VOLTAGE ADJUSTMENT
Optional output voltage adjustment circuits are shown in
Figures 3 and 4. Trimming the output voltage will change
the voltage drift by approximately 0.008ppm/°C per mV of
trimmed voltage. In the circuit in Figure 3, any mismatch in
TCR between the two sections of the potentiometer will also
affect drift, but the effect of the ∆TCR is reduced by a factor
of five by the internal resistor divider. A high quality
potentiometer, with good mechanical stability, such as a
cermet, should be used. The circuit in Figure 3 has a
minimum trim range of ±300mV. The circuit in Figure 4 has
less range but provides higher resolution. The mismatch in
TCR between RS and the internal resistors can introduce
some slight drift. This effect is minimized if RS is kept
significantly larger than the 50kΩ internal resistor. A TCR
of 100ppm/°C is normally sufficient.
Since the shape of the actual drift curve is not known, the
vertical position of the box is not exactly known either. It is,
however, bounded by VUPPER BOUND and VLOWER BOUND (see
Figure 1). Figure 1 uses the REF102CM as an example. It
has a drift specification of 2.5ppm/°C maximum and a
specification temperature range of –25°C to +85°C. The
“box” height, V1 to V2, is 2.75mV.
REF102BM VUPPER BOUND
+10.00275
V
1
2.75mV
VNOMINAL
V+
Worst-case
∆VOUT for
REF102CM
+10.0000
+
1µF
Tantalum
2
V
2
VOUT
6
+9.99725
REF102BM VLOWER BOUND
+10V
REF102
VTRIM
5
20kΩ
–25
0
+25
+50
+85
Output
Voltage
Adjust
Temperature (°C)
4
FIGURE 1. REF102CM Output Voltage Drift.
Minimum range (±300mV) and minimal
degradation of drift.
FIGURE 3. REF102 Optional Output Voltage Adjust.
®
6
REF102
APPLICATIONS INFORMATION
V+
High accuracy, extremely low drift, outstanding stability,
and low cost make the REF102 an ideal choice for all
instrumentation and system reference applications. Figures 6
through 14 show a variety of useful application circuits.
+
1µF
Tantalum
2
VOUT
6
+10V
REF102
VTRIM
5
RS
20kΩ
V+ (1.4V to 26V)
2
Output
Voltage
Adjust
1MΩ
4
6
REF102
1.4mA < (5V –IL ) < 5.4mA
RS
Higher resolution, reduced range (typically ±25mV).
4
FIGURE 4. REF102 Optional Output Voltage Fine Adjust.
–10V Out
IL
RS
OPTIONAL NOISE REDUCTION
V+ (1.4V to 26V)
–15V
2
The high-frequency noise of the REF102 is dominated by
the zener diode noise. This noise can be greatly reduced by
connecting a capacitor between the Noise Reduction pin and
ground. The capacitor forms a low pass filter with R6 (refer
to the figure on the first page of the data sheet) and attenu-
ates the high-frequency noise generated by the zener. Figure
5 shows the effect of a 1µF noise reduction capacitor on the
high frequency noise of the REF102. R6 is typically 7kΩ so
the filter has a –3dB frequency of about 22Hz. The result is
a reduction in noise from about 800µVp-p to under 200µ
Vp-p. If further noise reduction is required, use the circuit in
Figure 14.
a) Resister Biased –10V Reference
R1
2kΩ
REF102
10V
6
C1
1000pF
4
–10V Out
OPA27
b) Precision –10V Reference.
See AB-004 for more detail
FIGURE 6. –10V Reference Using a) Resistor or b) OPA27.
NO CN
CN = 1µF
FIGURE 5. Effect of 1µF Noise Reduction Capacitor on
Broadband Noise (f–3dB = 1MHz).
®
7
REF102
V+
V+
V+
2
220Ω
–
OPA27
+10V
2N2905
6
2
2
IL
+
REF102
R1 = VCC – 10V
IL (TYP)
6
+10V
IL
6
REF102
REF102
+10V
4
IL
4
4
a) –20mA < IL < +20mA
(OPA27 also improves transient immunity)
b) –5mA < IL < +100mA
c) I L (MAX) = I L (TYP) +10mA
I L (MIN) = I L (TYP) –5mA
FIGURE 7. +10V Reference With Output Current Boosted to: a) ±20mA, b) +100mA, and c) IL (TYP) +10mA, –5A.
+15V
28mA
357Ω
1/2W
2
28.5mA
6
+5V
350Ω Strain
REF102
Gauge Bridge
5
–
4
8
VOUT
x100
RG
INA101
2
3
+
–
OPA27
+
10
6
–5V
357Ω
1/2W
–15V
FIGURE 8. Strain Gauge Conditioner for 350Ω Bridge.
V+
2
V+
2
6
REF102
6
+10V
REF102
Out
2
5
6
–10V
Out
R
25kΩ
25kΩ
–
IOUT
4
OPA111
4
25kΩ
25kΩ
+
LOAD
3
1
Can be connected
to ground or –VS .
INA105
IOUT = 10V , R ≥ 1kΩ
R
See AB-002 for more details and I Sink Circuit.
See AB-005 for more details.
FIGURE 9. ±10V Reference.
FIGURE 10. Positive Precision Current Source.
®
8
REF102
V+
31.4V to 56V
2
2
6
+10V
+30V
6
REF102
REF102
INA105
2
5
4
4
2
–
+
6
+5V
3
+20V
6
REF102
1
4
2
REF102
4
FIGURE 13. +5V and +10V Reference.
+10V
6
V+
2
2kΩ
6
REF102
(1)
VOUT 1
NOTES: (1) REF102s can be stacked to obtain voltages in multiples of 10V.
(2) The supply voltage should be between 10n + 1.4 and 10n + 26 where n
is the number of REF102s. (3) Output current of each REF102 must not
exceed its rated output current of +10, –5mA. This includes the current
delivered to the lower REF102.
R2
2kΩ
4
FIGURE 11. Stacked References.
C2
V+
1µF
OPA27
2
2
3
–
V+
2
2kΩ
6
+
R1
1k
REF102
(2)
VOUT 2
Ω
+10V
VREF
+5V
6
C1
1µF
Out
REF102
2
4
INA105
4
–5V
Out
V+
2
5
6
–
+
2kΩ
6
REF102
(N)
V
REF = (VO1 + VO2 ....VOUT
)
N
VOUT N
N
eN = 5µVp-p (f = 0.1Hz to 1Mhz)
N
4
1
3
See AB-003 for more details.
FIGURE 14. Precision Voltage Reference with Extremely
Low Noise.
FIGURE 12. ±5V Reference.
®
9
REF102
相关型号：
REF102BM
Three Terminal Voltage Reference, 1 Output, 10V, Trim/Adjustable, MBCY8, METAL CAN, TO-99, 8 PIN
BB
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