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Details, datasheet, quote on part number:LM385PW-2-5
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Datasheet text preview:
LM285-2.5, LM385-2.5, LM385B-2.5 MICROPOWER VOLTAGE REFERENCES
SLVS023H JANUARY 1989 REVISED AUGUST 2003
D D D D D
D
Operating Current Range . . . 20 µA to 20 mA 1.5% and 3% Initial Voltage Tolerance Reference Impedance LM385 . . . 1 Max at 25°C All Devices . . . 1.5 Max Over Full Temperature Range Very Low Power Consumption Applications: Portable Meter References Portable Test Instruments Battery-Operated Systems Current-Loop Instrumentation Panel Meters Interchangeable With Industry-Standard LM285-2.5 and LM385-2.5
LM285-2.5 . . . D PACKAGE LM385-2.5, LM385B-2.5 . . . D OR PW PACKAGE (TOP VIEW)
NC NC NC ANODE
1 2 3 4
8 7 6 5
CATHODE NC NC NC
NC No internal connection LM285-2.5, LM385-2.5, LM385B-2.5 . . . LP PACKAGE (TOP VIEW)
ANODE CATHODE NC
NC No internal connection
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
TA VZ TOLERANCE SOIC (D) 3% TO226 / TO-92 (LP) TSSOP (PW) 0°C to 70 C 70°C SOIC (D) 1.5% TO226 / TO-92 (LP) TSSOP (PW) SOIC (D) 40°C to 85 C 85°C 1.5% TO226 / TO-92 (LP) PACKAGE Tube of 75 Reel of 2000 Tube of 1000 Reel of 2000 Tube of 150 Reel of 2000 Tube of 75 Reel of 2000 Tube of 1000 Reel of 2000 Tube of 150 Reel of 2000 Tube of 75 Reel of 2000 Tube of 1000 Reel of 2000 ORDERABLE PART NUMBER LM385D-2-5 LM385DR-2-5 LM385LP-2-5 LM385LPR-2-5 LM385PW-2-5 LM385PWR-2-5 LM385BD-2-5 LM385BDR-2-5 LM385BLP-2-5 LM385BLPR-2-5 LM385BPW-2-5 LM385BPWR-2-5 LM285D-2-5 LM285DR-2-5 LM285LP-2-5 LM285LPR-2-5 TOP-SIDE MARKING 385-25 385-25 385-25 385B25 385-25 385B25 285-25 285-25
285-25 Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.
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.
Copyright 2003, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
1
LM285-2.5, LM385-2.5, LM385B-2.5 MICROPOWER VOLTAGE REFERENCES
SLVS023H JANUARY 1989 REVISED AUGUST 2003
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. These voltage references can be used to make portable meters, regulators, or general-purpose analog circuitry, with battery life approaching shelf life. The wide operating current range allows them to replace older references with tighter-tolerance parts.
symbol
ANODE CATHODE
schematic
CATHODE
7.5 k
600 k Q12
Q13
Q4
Q7 Q11
200 k
Q3 Q10 Q1 20 pF Q2 Q5 Q6 Q8 20 pF Q9
50 k
300 k
500
Q14
100 k
500
60 k
500 ANODE
NOTE A: All component values shown are nominal.
2
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
LM285-2.5, LM385-2.5, LM385B-2.5 MICROPOWER VOLTAGE REFERENCES
SLVS023H JANUARY 1989 REVISED AUGUST 2003
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Reverse current, IR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA Forward current, IF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mA Package thermal impedance, JA (see Notes 1 and 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W LP package . . . . . . . . . . . . . . . . . . . . . . . . . . 140°C/W PW package . . . . . . . . . . . . . . . . . . . . . . . . . 149°C/W Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. Maximum power dissipation is a function of TJ(max), JA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) TA)/JA. Operation at the absolute maximum TJ of 150°C can affect reliability. 2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions
MIN IZ TA Reference current Operating free-air temperature range LM285-2.5 LM385-2.5, LM385B-2.5 0.02 40 0 MAX 20 85 70 UNIT mA °C
electrical characteristics at specified free-air temperature
PARAMETER VZ Reference voltage Average temperature coefficient of reference voltage§ Change in reference voltage with current Long-term change in reference voltage Minimum reference current Reference impedance Broadband noise voltage IZ = 100 µA IZ = 100 µA, f = 10 Hz to 10 kHz TEST CONDITIONS IZ = 20 µA to 20 mA IZ = 20 µA to 20 mA TA 25°C LM285-2.5 MIN 2.462 TYP 2.5 MAX 2.538 LM385-2.5 MIN 2.425 TYP 2.5 MAX 2.575 LM385B-2.5 MIN 2.462 TYP 2.5 MAX 2.538 UNIT V
VZ
25°C
±20
±20
±20
ppm/°C
VZ
IZ = 20 µA to 1 mA IZ = 1 µA to 20 mA
25°C Full range 25°C Full range 25°C ±20
1 1.5 10 30 ±20
2 2 20 30 ±20
2 2 20 30 mV
VZ/t
IZ = 100 µA
ppm/khr
IZ(min)
Full range 25°C Full range 25°C
8 0.2
20 0.6 1.5
8 0.4
20 1 1.5
8 0.4
20 1 1.5
µA µV
zz
Vn
120
120
120
Full range is 0°C to 70°C for the LM385-2.5 and LM385B-2.5, and 40°C to 85°C for the LM285-2.5. § The average temperature coefficient of reference voltage is defined as the total change in reference voltage divided by the specified temperature range.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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