LINER LM199 Precision reference Datasheet

LM199/LM399
LM199A/LM399A
Precision Reference
U
FEATURES
DESCRIPTIO
■
The LM199/LM399 precision shunt reference features
excellent temperature stability over a wide range of voltage, temperature and operating current conditions. A
stabilizing heater is incorporated with the active Zener on
a monolithic substrate which nearly eliminates changes in
voltage with temperature. The subsurface Zener operates
over a current range of 0.5mA to 10mA, and offers minimal
noise and excellent long-term stability.
■
■
■
■
■
■
6.95V Shunt Reference
Guaranteed 0.5ppm/°C Temperature Coefficient
Guaranteed 1Ω Maximum Dynamic Impedance
Guaranteed 20µVRMS Maximum Noise
Guaranteed Initial Tolerance of 2%
Wide Operating Current Range
Available in 4-Lead TO-46 Metal Can
U
APPLICATIO S
■
■
■
■
Ideal applications for the LM199/LM399 include digital voltmeters, precision calibration equipment, current sources
and a variety of other precision low cost references. A 10V
buffered reference application is shown below.
Precision Voltage Reference for Multimeters
Calibration Equipment Voltage Standards
Laboratory Measurement Equipment
Industrial Monitor/Control Instruments
High Accuracy Data Converters
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
U
■
TYPICAL APPLICATIO
10V Buffered Reference
Reverse Voltage Change
15V
+
1
3
8
9k
0.1%
2
LM399H
–
7
LT®1001
6.95V
3
6
+
4
20k
0.1%
–
4
2
LM199 TA01a
10V
REVERSE VOLTAGE CHANGE (mV)
7.5k
5%
7
6
5
STABILIZED
(TJ ≈ 90°C)
4
TJ = 25°C
3
2
1
0
0
2
4
8
6
REVERSE CURRENT (mA)
10
LM199 TA01b
LM199399fb
1
LM199/LM399
LM199A/LM399A
U
W W
W
ABSOLUTE
AXI U RATI GS
U
W
U
PACKAGE/ORDER I FOR ATIO
(Note 1)
Temperature Stabilizer ..............................................40V
Reverse Breakdown Current...................................20mA
Forward Current .......................................................1mA
Reference to Substrate Voltage, VRS (Note 2) ........–0.1V
Operating Temperature Range
LM199/LM199A (OBSOLETE) ............ –55°C to 125°C
LM399/LM399A ....................................... 0°C to 70°C
Storage Temperature Range
LM199/LM199A (OBSOLETE) ............ –65°C to 150°C
LM399/LM399A ................................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
TOP VIEW
+
1
4
–
3
+
H
–
2
H PACKAGE
4-LEAD TO-46 METAL CAN
INSIDE THERMAL SHIELD
ORDER PART NUMBER
LM399H
LM399AH
LM199H
LM199AH
LM199AH-20
LM399AH-20
LM399AH-50
OBSOLETE
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 3)
SYMBOL PARAMETER
CONDITIONS
VZ
Reverse Breakdown Voltage
0.5mA ≤ IR ≤ 10mA
●
ΔVZ
Reverse Breakdown Voltage Change
with Current
0.5mA ≤ IR ≤ 10mA
●
rZ
Reverse Dynamic Impedance
ΔVZ
ΔTemp
Temperature Coefficient
LM199/LM399
LM199A/LM399A
LM399/LM399A
MIN
TYP
MAX
6.8
6.75
6.95
7.1
6
IR = 1mA (Note 6) (10Hz ≤ f ≤ 100Hz) ●
UNITS
6.95
7.3
V
9
6
12
mV
0.5
1
0.5
1.5
Ω
–55°C ≤ TA ≤ 85°C
85°C ≤ TA ≤ 125°C
0°C ≤ TA ≤ 70°C
0.3
5
1
15
–55°C ≤ TA ≤ 85°C
85°C ≤ TA ≤ 125°C
0°C ≤ TA ≤ 70°C
0.2
5
en
RMS Noise
10Hz ≤ f ≤ 10kHz
ΔVZ
ΔTime
IH
Long-Term Stability
Stabilized, 22°C ≤ TA ≤ 28°C,
1000 Hours, IR = 1mA ±0.1%
VH
LM199/LM199A
MIN
TYP
MAX
0.3
Temperature Stabilizer Supply Current TA = 25°C, Still Air, VH = 30V
TA = –55°C (Note 5)
●
Temperature Stabilizer Supply Voltage
Warm-Up Time to ±0.05% VZ
VH = 30V
Initial Turn-On Current
9V ≤ VH ≤ 40V (Note 5)
7
20
7
8
(Note 4)
8
8.5
22
14
28
8.5
9
40
3
140
1
ppm/°C
ppm/°C
ppm/°C
50
µV
0.5
10
0.3
●
2
ppm/°C
ppm/°C
ppm/°C
9
(Note 4) ppm/√kH
15
40
3
200
140
mA
V
Seconds
200
mA
LM199399fb
2
LM199/LM399
LM199A/LM399A
ELECTRICAL CHARACTERISTICS
Note 4: Devices with maximum guaranteed long-term stability of
20ppm/√kH are available. Drift decreases with time.
Note 5: This initial current can be reduced by adding an appropriate
resistor and capacitor to the heater circuit. See the Typical Performance
Characteristics graphs to determine values.
Note 6: Guaranteed by “Reverse Breakdown Change with Current.”
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The substrate is electrically connected to the negative terminal
of the temperature stabilizer. The voltage that can be applied to either
terminal of the reference is 40V more positive or 0.1V more negative than
the substrate.
Note 3: These specifications apply for 30V applied to the temperature
stabilizer and –55°C ≤ TA ≤ 125°C for the LM199; and 0°C ≤ TA ≤ 70°C for
the LM399.
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Reverse Characteristics
Dynamic Impedance
10
1
TJ = 25°C
0.1
STABILIZED
(TJ ≈ 90°C)
0.01
6.25
1
10
STABILIZED
(TJ ≈ 90°C)
1
7.05
10
–2
100
1k
10k
FREQUENCY (Hz)
–4
100k
4
12
16
8
HEATER ON TIME (SECONDS)
0
LM199 G02
Initial Heater Current
Heater Current
160
80
VH = 40V
20
LM199 G03
Heater Current
TA = 25°C
140
200
150
100
50
60
HEATER CURRENT (mA)
HEATER CURRENT (mA)
INITIAL HEATER CURRENT (mA)
TA = –55°C
–1
–3
LM199 G01
250
TA = 25°C
TJ = 25°C
0.1
6.85
6.45
6.65
REVERSE VOLTAGE (V)
VH = 15V
0
OUTPUT (mV)
DYNAMIC IMPEDANCE (Ω)
REVERSE CURRENT (mA)
Stabilization Time
100
100
VH = 10V
40
VH = 20V
VH = 30V
20
LM199 G04
0
25 45 65
–55 –35 –15 5
TEMPERATURE (°C)
100
80
VH = 10V
60
VH = 20V
VH = 30V
40
20
VH = 40V
0
–55 –35 –15 5 25 45 65 85 105 125
TURN ON TEMPERATURE (°C)
120
VH = 40V
0
85
105
LM199 G05
0
2
4
6 8 10 12 14 16 18
TIME (SECONDS)
LM199 G06
LM199399fb
3
LM199/LM399
LM199A/LM399A
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Response Time
8
OUTPUT
7
150
STABILIZED
(TJ ≈ 90°C)
100
5
VOLTAGE SWING (V)
NOISE (nV/√Hz)
6
4
Limiting Surge Current
STABILIZED
(TJ ≈ 90°C)
MAXIMUM SURGE LIMITING RESISTOR (Ω)
Zener Noise Voltage
200
TJ = 25°C
3
7.5k
2
1
INPUT
0
OUTPUT
20
TJ = 25°C
INPUT
10
0
50
10
100
1k
10k
FREQUENCY (Hz)
100k
0
100
200
TIME (µs)
300
LM199 G07
400
LM199 G08
800
700
600
500
25°C (46mA)
5°C (60mA)
–15°C (71mA)
–35°C (87mA)
–55°C (105mA)
400
300
200
100
0
0
20
10
30
MINIMUM SUPPLY VOLTAGE (V)
40
HEATER MUST BE BYPASSED WITH A 2µF OR LARGER
TANTALUM CAPACITOR IF RESISTORS ARE USED
LM199 G09
Long-Term Reference
Performance, 44 Units Tested
Low Frequency Noise Voltage
12
8
NOISE(10µV/DIV)
DRIFT (ppm)
10
3 SIGMA
6
4
MEAN
2
0
2
4
6
8
MONTHS
10
12
LM199 G10
0
50
150
100
TIME (SECONDS)
200
250
LM199 G11
LM199399fb
4
LM199/LM399
LM199A/LM399A
W
U
U
FU CTIO AL BLOCK DIAGRA
3
1
+
+
H
–
–
4
2
LT199 FD
U
TYPICAL APPLICATIO S
Single Supply Operation
Split Supply Operation
9V TO 40V
Negative Heater Supply with
Positive Reference
15V
15V
RS
7.5k
+
7.5k
+
+
LM399
LM399
LM399
6.95V
6.95V
6.95V
–
–
–
LM199 TA02
–9V TO –33V
–15V
LM199 TA04
LM199 TA03
Standard Cell Replacement
15V TO 20V
1% REGULATED
1µF
7.5k
+
–
1
3
4
OUTPUT
ADJUST
LM199A
12k
0.1%
6.95V
20k
22k
2
–
2k 3
+
100k
2M
2
2k
0.1%
7
LT1001AC
6
OUTPUT
4
1µF
LM199 TA05
LM199399fb
5
LM199/LM399
LM199A/LM399A
U
TYPICAL APPLICATIO S
Portable Calibrator
8.8k
1%
2
200k
+
12V TO
18V
–
7
LT1001AC
3
+
6
OUTPUT
10V
4
5k
+
19k
1%
LM399
6.95V
3k
TRIM
–
LM199 TA06
W
W
SCHE ATIC DIAGRA S
Temperature Stabilizer
Reference
3
1
Q9
Q5
Q2
+
1k
Q3
6.3V
50Ω Q10
+
Q15
Q8
Q6
Q1
Q14
2k
Q12
15pF
Q7
10pF
30pF
2k
Q16
Q13
10k
11.2k
2k
D1
6.3V
Q3 Q4
4.2Ω
D2
6.3V
2k
Q11
2.6k
30k
1k
4
LM199 SD01
–
2
–
LM199 SD02
LM199399fb
6
LM199/LM399
LM199A/LM399A
U
PACKAGE DESCRIPTIO
H Package
4-Lead TO-46 Metal Can
Thermal Shield* for TO-46, H Package
(Reference LTC DWG # 05-08-1341)
.209 – .219
(5.309 – 5.563)
.178 – .195
(4.521 – 4.953)
REFERENCE
PLANE
.085 – .105
(2.159 – 2.667)
.500
(12.700)
MIN
.025
(0.635)
MAX
SEATING*
PLANE
.016 – .019**
(0.406 – 0.483)
DIA
.050
(1.270)
TYP
.100
(2.540)
TYP
.399 – .409
(10.135 – 10.389)
DIA
.244 – .234
(5.690 – 5.943)
SEATING
PLANE
.400
(10.160)
.016 – .019
(0.406 – 0.483)
TYP DIA
.100
(2.540)
.050
(1.270)
.050
(1.270)
TYP
* THERMAL SHIELD MATERIAL IS VALOXTM.
VALOX IS A TRADEMARK OF GENERAL ELECTRIC
PIN 1
45°
.036 – .046
(0.914 – 1.168)
.028 – .048
(0.711 – 1.219)
H4(TO-46) 0801
*LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE
AND .050" BELOW THE REFERENCE PLANE
.016 – .024
**FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS
(0.406 – 0.610)
LM199399fb
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
7
LM199/LM399
LM199A/LM399A
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1021
Precision References for Series or Shunt Operation
Industry Standard Pinout, –40°C to 125°C
LT1389
1.25V, 2.5V, 4V and 5V Nanopower Shunt Reference
800nA, 0.05% Accuracy, 10ppm/°C Drift
LT1634
1.25 and 2.5V Micropower Shunt Reference
0.05%, 10ppm/°C, 10µA Current
LTZ1000
7V Ultra Precision, Stable Shunt Reference
0.05ppm/°C, 1.2mVP-P Noise
LM199399fb
8
Linear Technology Corporation
LT 1005 REV B • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 1987
Similar pages