LM2907MSLASHNOPB datasheet(3/31 Pages) TI1

3 / 31 page

LM2907-N, LM2917-N

www.ti.com

SNAS555C – JUNE 2000 – REVISED MARCH 2013

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

ABSOLUTE MAXIMUM RATINGS

(1) (2)

Supply Voltage

28V

Supply Current (Zener Options)

25 mA

Collector Voltage

28V

Differential Input Voltage

Tachometer

28V

Op Amp/Comparator

28V

Input Voltage Range

Tachometer

LM2907-8, LM2917-8

±28V

LM2907, LM2917

0.0V to +28V

Op Amp/Comparator

0.0V to +28V

Power Dissipation

LM2907-8, LM2917-8

1200 mW

LM2907-14, LM2917-14(1)

1580 mW

Operating Temperature Range

−40°C to +85°C

Storage Temperature Range

−65°C to +150°C

Soldering Information

PDIP Package

Soldering (10 seconds)

260°C

SOIC Package

Vapor Phase (60 seconds)

215°C

Infrared (15 seconds)

220°C

(1)

For operation in ambient temperatures above 25°C, the device must be derated based on a 150°C maximum junction temperature and a

thermal resistance of 101°C/W junction to ambient for LM2907-8 and LM2917-8, and 79°C/W junction to ambient for LM2907-14 and

LM2917-14.

(2)

If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and

specifications.

ELECTRICAL CHARACTERISTICS

VCC = 12 VDC, TA = 25°C, see test circuit

Symbol

Parameter

Conditions

Min

Typ

Max

Units

TACHOMETER

Input Thresholds

VIN = 250 mVp-p @ 1 kHz

(1)

±10

±25

±40

Hysteresis

VIN = 250 mVp-p @ 1 kHz

(1)

Offset Voltage

VIN = 250 mVp-p @ 1 kHz

(1)

LM2907/LM2917

3.5

LM2907-8/LM2917-8

Input Bias Current

VIN = ±50 mVDC

0.1

μA

VOH

Pin 2

VIN = +125 mVDC

(2)

8.3

VOL

Pin 2

VIN = −125 mVDC

(2)

2.3

I2, I3

Output Current

V2 = V3 = 6.0V(3)

140

180

240

μA

Leakage Current

I2 = 0, V3 = 0

0.1

μA

Gain Constant

See(2)

0.9

1.0

1.1

Linearity

fIN = 1 kHz, 5 kHz, 10 kHz

(4)

−1.0

0.3

+1.0

OP/AMP COMPARATOR

VOS

VIN = 6.0V

IBIAS

VIN = 6.0V

500

Input Common-Mode

VCC−1.5V

Voltage

(1)

Hysteresis is the sum +VTH − (−VTH), offset voltage is their difference. See test circuit.

(2)

VOH is equal to ¾ × VCC − 1 VBE, VOL is equal to ¼ × VCC − 1 VBE therefore VOH − VOL = VCC/2. The difference, VOH − VOL, and the

mirror gain, I2/I3, are the two factors that cause the tachometer gain constant to vary from 1.0.

(3)

Be sure when choosing the time constant R1 × C1 that R1 is such that the maximum anticipated output voltage at pin 3 can be reached

with I3 × R1. The maximum value for R1 is limited by the output resistance of pin 3 which is greater than 10 MΩ typically.

(4)

Nonlinearity is defined as the deviation of VOUT (@ pin 3) for fIN = 5 kHz from a straight line defined by the VOUT @ 1 kHz and VOUT @

10 kHz. C1 = 1000 pF, R1 = 68k and C2 = 0.22 mFd.

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