Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - voltage reference Shunt Adjustable SOIC 8

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  

SLVS023J − JANUARY 1989 − REVISED MARCH 2005

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D Operating Current Range ...20 µA to

20 mA

D 1.5% and 3% Initial Voltage Tolerance

D Reference Impedance

− LM385 ...1 Ω Max at 25°C

− All Devices . . . 1.5 Ω Max Over Full

Temperature Range

D Very Low Power Consumption

D Applications

− Portable Meter References

− Portable Test Instruments

− Battery-Operated Systems

− Current-Loop Instrumentation

− Panel Meters

D Interchangeable With Industry-Standard

LM285-2.5 and LM385-2.5

description/ordering information

These micropower two-terminal band-gap voltage references operate over a 20-µA to 20-mA current range and

feature exceptionally low dynamic impedance and good temperature stability. On-chip trimming provides tight

voltage tolerance. The band-gap reference for these devices has low noise and long-term stability.

ORDERING INFORMATION

TOLERANCE

PACKAGE

†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

SOIC (D)

Tube of 75 LM385D-2-5

385-25

SOIC (D)

Reel of 2000 LM385DR-2-5

385-25

TO226/TO-92 (LP)

Tube of 1000 LM385LP-2-5

385-25

3% TO226/TO-92 (LP)

Reel of 2000 LM385LPR-2-5

385-25

TSSOP (PW)

Tube of 150 LM385PW-2-5

385-25

0°C to 70°C

TSSOP (PW)

Reel of 2000 LM385PWR-2-5

385-25

0°C to 70°C

SOIC (D)

Tube of 75 LM385BD-2-5

385B25

SOIC (D)

Reel of 2000 LM385BDR-2-5

385B25

1.5%

TO226/TO-92 (LP)

Tube of 1000 LM385BLP-2-5

385-25

1.5% TO226/TO-92 (LP)

Reel of 2000 LM385BLPR-2-5

385-25

TSSOP (PW)

Tube of 150 LM385BPW-2-5

385B25

TSSOP (PW)

Reel of 2000 LM385BPWR-2-5

385B25

SOIC (D)

Tube of 75 LM285D-2-5

285-25

−40°C to 85°C

1.5%

SOIC (D)

Reel of 2000 LM285DR-2-5

285-25

−40°C to 85°C 1.5%

TO226/TO-92 (LP)

Tube of 1000 LM285LP-2-5 285-25

TO226/TO-92 (LP)

Reel of 2000 LM285LPR-2-5 285-25

†

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

ANODE

CATHODE

LM285-2.5 ...D PACKAGE

LM385-2.5, LM385B-2.5 ...D OR PW PACKAGE

(TOP VIEW)

LM285-2.5, LM385-2.5, LM385B-2.5 . . . LP PACKAGE

(TOP VIEW)

NC − No internal connection

CATHODE

ANODE

NC − No internal connection

Summary of content (18 pages)

PAGE 1
SLVS023J − JANUARY 1989 − REVISED MARCH 2005 D Operating Current Range . . . 20 µA to D D D D D LM285-2.5 . . . D PACKAGE LM385-2.5, LM385B-2.5 . . . D OR PW PACKAGE (TOP VIEW) 20 mA 1.5% and 3% Initial Voltage Tolerance Reference Impedance − LM385 . . . 1 Ω Max at 25°C − All Devices . . . 1.
PAGE 2
SLVS023J − JANUARY 1989 − REVISED MARCH 2005 description/ordering information (continued) The design makes these devices exceptionally tolerant of capacitive loading and, thus, easier to use in most reference applications. The wide dynamic operating temperature range accommodates varying current supplies, with excellent regulation. The extremely low power drain of this series makes them useful for micropower circuitry.
PAGE 3
SLVS023J − JANUARY 1989 − REVISED MARCH 2005 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Reverse current, IR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA Forward current, IF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 4
SLVS023J − JANUARY 1989 − REVISED MARCH 2005 TYPICAL CHARACTERISTICS† REVERSE CURRENT vs REVERSE VOLTAGE REFERENCE VOLTAGE CHANGE vs REVERSE CURRENT 100 16 TA = −55°C to 125°C ∆V Z − Reference Voltage Change − mV I R − Reverse Current − µA TA = −55°C to 125°C 10 1 0.1 0 0.5 1 2.5 2 1.5 12 8 4 0 −4 0.01 3 VR − Reverse Voltage − V 0.1 1 Figure 1 REFERENCE VOLTAGE vs FREE-AIR TEMPERATURE 2.525 1.
PAGE 5
SLVS023J − JANUARY 1989 − REVISED MARCH 2005 TYPICAL CHARACTERISTICS† REFERENCE IMPEDANCE vs FREQUENCY REFERENCE IMPEDANCE vs REFERENCE CURRENT 1000 10 k IZ = 100 µA TA = 25°C z z − Reference Impedance − Ω z z − Reference Impedance − Ω f = 25 Hz TA = MIN to MAX‡ 100 10 1 0.1 0.01 0.1 1 10 1k 100 10 1 0.1 0.01 100 0.
PAGE 6
SLVS023J − JANUARY 1989 − REVISED MARCH 2005 TYPICAL CHARACTERISTICS† TRANSIENT RESPONSE Input and Output Voltage − V 4 ÎÎÎ ÎÎÎ 3 Output 24 kΩ 2 VI VO 1 0 5 ÎÎ ÎÎ Input 0 0 100 t − Time − µs 500 600 Figure 9 † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices.
PAGE 7
SLVS023J − JANUARY 1989 − REVISED MARCH 2005 APPLICATION INFORMATION IO ≈ 60 µA + Two Mercury Cells 2.6 V − V+ 3.3 kΩ 200 kΩ ±1% LM334 cw 2.00 kΩ ±1% cw V− 20 kΩ 500 Ω 412 Ω† ±1% 953 Ω ±1% LM385-2.5 R + Type K − Meter † Adjust for 12.17 mV at 25°C across 412 Ω Figure 10. Thermocouple Cold-Junction Compensator 3.7 V ≤ V+ ≤ 30 V V+ LM334 R V− 2.74 kΩ 2.5 V LM385-2.5 Figure 11. Operation Over a Wide Supply Range 9V 221 kΩ 2.
PAGE 8
PACKAGE OPTION ADDENDUM www.ti.
PAGE 9
PACKAGE OPTION ADDENDUM www.ti.
PAGE 10
PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 11-Apr-2013 Status (1) LM385PWRG4-2-5 ACTIVE Package Type Package Pins Package Drawing Qty TSSOP PW 8 2000 Eco Plan Lead/Ball Finish (2) Green (RoHS & no Sb/Br) MSL Peak Temp Op Temp (°C) Top-Side Markings (3) CU NIPDAU Level-1-260C-UNLIM (4) 0 to 70 385-25 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
PAGE 11
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device LM285DR-2-5 Package Package Pins Type Drawing SOIC SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 LM385BDR-2-5 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 LM385BPWR-2-5 TSSOP PW 8 2000 330.0 12.4 7.0 3.6 1.6 8.0 12.
PAGE 12
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM285DR-2-5 SOIC D 8 2500 340.5 338.1 20.6 LM385BDR-2-5 SOIC D 8 2500 340.5 338.1 20.6 LM385BPWR-2-5 TSSOP PW 8 2000 367.0 367.0 35.0 LM385DR-2-5 SOIC D 8 2500 340.5 338.1 20.6 LM385PWR-2-5 TSSOP PW 8 2000 367.0 367.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.