REF195G Analog Devices, REF195G Datasheet

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REF195G

Manufacturer Part Number
REF195G
Description
Analog Devices -
Manufacturer
Analog Devices
Datasheet

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GENERAL DESCRIPTION
REF19x series precision bandgap voltage references use a pat-
ented temperature drift curvature correction circuit and laser
trimming of highly stable thin film resistors to achieve a very low
temperature coefficient and a high initial accuracy.
The REF19x series are micropower, Low Dropout Voltage
(LDV) devices providing a stable output voltage from supplies
as low as 100 mV above the output voltage and consuming less
than 45 A of supply current. In sleep mode, which is enabled
by applying a low TTL or CMOS level to the sleep pin, the
output is turned off and supply current is further reduced to less
than 15 A.
The REF19x series references are specified over the extended
industrial temperature range (–40 C to +85 C) with typical
performance specifications over –40 C to +125 C for applica-
tions such as automotive.
All electrical grades are available in 8-Lead SOIC; the PDIP and
TSSOP are only available in the lowest electrical grade. Prod-
ucts are also available in die form.
Test Pins (TP)
The test pins, Pin 1 and Pin 5, are reserved for in-package
zener-zap. To achieve the highest level of accuracy at the out-
put, the zener-zapping technique is used to trim the output
voltage. Since each unit may require a different amount of ad-
justment, the resistance value at the test pins will vary widely
from pin-to-pin as well as from part-to-part. The user should
not make any physical nor electrical connections to Pin 1 and
Pin 5.
REV. D
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.
FEATURES
Initial Accuracy:
Temperature Coefficient: 5 ppm/ C max
Low Supply Current: 45 A max
Sleep Mode: 15 A max
Low Dropout Voltage
Load Regulation: 4 ppm/mA
Line Regulation: 4 ppm/V
High Output Current: 30 mA
Short Circuit Protection
APPLICATIONS
Portable Instrumentation
A-to-D and D-to-A Converters
Smart Sensors
Solar Powered Applications
Loop Current Powered Instrumentations
2 mV max
Precision Micropower, Low Dropout,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
Model
REF19xGP
REF19xES
REF19xFS
REF19xGS
REF19xGRU –40 C to +85 C
REF19xGBC +25 C
NOTES
1
2
3
N = Plastic DIP, SO = Small Outline, RU = Thin Shrink Small Outline.
8-Lead plastic DIP only available in “G” grade.
REF193 and REF196 are available in “G” grade only.
Part Number
REF191
REF192
REF193
REF194
REF195
REF196
REF198
3
3
8-Lead Narrow-Body SO and TSSOP
Temperature
Range
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
SLEEP
SLEEP
8-Lead Epoxy DIP (P Suffix)
NC = NO CONNECT
TP PINS ARE FACTORY TEST POINTS
NO USER CONNECTION
PIN CONFIGURATIONS
GND
GND
(S Suffix and RU Suffix)
TP
TP
V
V
S
S
ORDERING GUIDE
World Wide Web Site: http://www.analog.com
4
1
2
3
4
1
2
3
Voltage References
(Not to Scale)
(Not to Scale)
Nominal Output Voltage (V)
2.048
2.50
3.00
4.50
5.00
3.30
4.096
TOP VIEW
TOP VIEW
REF19x
SERIES
REF19x
SERIES
Table I
REF19x Series
Package
Description
8-Lead Plastic DIP
8-Lead SOIC
8-Lead SOIC
8-Lead SOIC
8-Lead TSSOP
DICE
8
7
5
8
7
6
5
6
© Analog Devices, Inc., 1999
NC
OUTPUT
TP
NC
NC
NC
OUTPUT
TP
2
Package
Option
N-8
SO-8
SO-8
SO-8
RU-8
1

Related parts for REF195G

REF195G Summary of contents

Page 1

... Pin 1 and Pin 5. REV. D 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 ...

Page 2

REF19x Series REF191–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter 1 INITIAL ACCURACY “E” Grade “F” Grade “G” Grade 2 LINE REGULATION “E” Grade “F & G” Grades 2 LOAD REGULATION “E” Grade “F & G” Grades DROPOUT VOLTAGE 3 LONG-TERM STABILITY NOISE VOLTAGE ...

Page 3

REF191–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter 1, 2 TEMPERATURE COEFFICIENT “E” Grade “F” Grade 3 “G” Grade 4 LINE REGULATION “E” Grade “F & G” Grades 4 LOAD REGULATION “E” Grade “F & G” Grades DROPOUT VOLTAGE NOTES 1 For proper operation, ...

Page 4

REF19x Series REF192–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter 1 INITIAL ACCURACY “E” Grade “F” Grade “G” Grade 2 LINE REGULATION “E” Grade “F & G” Grades 2 LOAD REGULATION “E” Grade “F & G” Grades DROPOUT VOLTAGE 3 LONG-TERM STABILITY NOISE VOLTAGE ...

Page 5

REF192–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter 1, 2 TEMPERATURE COEFFICIENT “E” Grade “F” Grade 3 “G” Grade 4 LINE REGULATION “E” Grade “F & G” Grades 4 LOAD REGULATION “E” Grade “F & G” Grades DROPOUT VOLTAGE NOTES 1 For proper operation, ...

Page 6

REF19x Series REF193–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter 1, 2 TEMPERATURE COEFFICIENT 3 “G” Grade 4 LINE REGULATION “G” Grade 4 LOAD REGULATION “G” Grade DROPOUT VOLTAGE SLEEP PIN Logic High Input Voltage Logic High Input Current Logic Low Input Voltage Logic ...

Page 7

REF194–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter 1 INITIAL ACCURACY “E” Grade “F” Grade “G” Grade 2 LINE REGULATION “E” Grade “F & G” Grades 2 LOAD REGULATION “E” Grade “F & G” Grades DROPOUT VOLTAGE 3 LONG-TERM STABILITY NOISE VOLTAGE NOTES 1 ...

Page 8

REF19x Series REF194–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter 1, 2 TEMPERATURE COEFFICIENT “E” Grade “F” Grade 3 “G” Grade 4 LINE REGULATION “E” Grade “F & G” Grades 4 LOAD REGULATION “E” Grade “F & G” Grades DROPOUT VOLTAGE NOTES 1 For ...

Page 9

REF195–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter 1 INITIAL ACCURACY “E” Grade “F” Grade “G” Grade 2 LINE REGULATION “E” Grade “F & G” Grades 2 LOAD REGULATION “E” Grade “F & G” Grades DROPOUT VOLTAGE 3 LONG-TERM STABILITY NOISE VOLTAGE NOTES 1 ...

Page 10

REF19x Series REF195–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter 1, 2 TEMPERATURE COEFFICIENT “E” Grade “F” Grade 3 “G” Grade 4 LINE REGULATION “E” Grade “F & G” Grades 4 LOAD REGULATION “E” Grade “F & G” Grades DROPOUT VOLTAGE NOTES 1 For ...

Page 11

REF196–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter 1, 2 TEMPERATURE COEFFICIENT 3 “G” Grade 4 LINE REGULATION “G” Grade 4 LOAD REGULATION “G” Grade DROPOUT VOLTAGE SLEEP PIN Logic High Input Voltage Logic High Input Current Logic Low Input Voltage Logic Low Input ...

Page 12

REF19x Series REF198–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter 1 INITIAL ACCURACY “E” Grade “F” Grade “G” Grade 2 LINE REGULATION “E” Grade “F & G” Grades 2 LOAD REGULATION “E” Grade “F & G” Grades DROPOUT VOLTAGE 3 LONG-TERM STABILITY NOISE VOLTAGE ...

Page 13

REF198–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter 1, 2 TEMPERATURE COEFFICIENT “E” Grade “F” Grade 3 “G” Grade 4 LINE REGULATION “E” Grade “F & G” Grades 4 LOAD REGULATION “E” Grade “F & G” Grades DROPOUT VOLTAGE NOTES 1 For proper operation, ...

Page 14

REF19x Series WAFER TEST LIMITS Parameter Symbol INITIAL ACCURACY REF191 V O REF192 REF193 REF194 REF195 REF196 REF198 LINE REGULATION V O LOAD REGULATION V O DROPOUT VOLTAGE V – SLEEP MODE INPUT Logic Input High V IH ...

Page 15

TYPICAL PARTS 5.003 5.15V < V < 15V IN 5.002 5.001 5.000 4.999 4.998 4.997 4.996 –50 – TEMPERATURE – C Figure 1. REF195 Output Voltage vs. Temperature 32 28 +5.15V V 15V ...

Page 16

REF19x Series 0 –20 –40 –60 –80 –100 –120 10 100 1k 10k FREQUENCY – Hz Figure 7a. Ripple Rejection vs. Frequency REF19x V = +15V REF Figure 7b. ...

Page 17

Figure 12. Line Transient Response Figure 14. Simplified Schematic APPLICATIONS SECTION Output Short Circuit Behavior The REF19x family of devices is totally protected from damage due to accidental output shorts to GND or to ...

Page 18

REF19x Series Membrane Switch Controlled Power Supply With output load currents in the tens of mA, the REF19x family of references can operate as a low dropout power supply in hand-held instrument applications. In the circuit shown in Figure 16, ...

Page 19

A Negative Precision Reference without Precision Resistors In many current-output CMOS DAC applications, where the output signal voltage must be of the same polarity as the reference voltage often required to reconfigure a cur- rent-switching DAC into a ...

Page 20

REF19x Series + > V +0.15V S OUT2 U1 REF192 C1 0 (U1 (D1) O AD589 V IN COMMON Figure 20. Stacking Voltage References with the REF19x A Precision Current Source Many times, ...

Page 21

There is one application caveat that should be understood about this circuit, which comes about due to the wire-OR nature. Since U1 and U2 can only source current effectively, negative going output voltage changes, which require the sinking of cur- ...

Page 22

REF19x Series conditions, two REF195 devices are used for U1 and U2, with their ON/OFF switching controlled by the presence or absence of the primary dc supply source backup source that supplies power to the load ...

Page 23

REV. D OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 8-Lead Plastic DIP (P Suffix) (N-8) 0.430 (10.92) 0.348 (8.84 0.280 (7.11) 0.240 (6.10 0.325 (8.25) 0.300 (7.62) 0.060 (1.52) PIN 1 0.015 (0.38) 0.210 (5.33) ...

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