TCA0372

4

MOTOROLA ANALOG IC DEVICE DATA

VCC = +15 V

VEE = –15 V

AV = +100

RL = 50 Ω

t, TIME (100

µs/DIV)

Figure 7. Sine Wave Reponse

Figure 8. Bidirectional DC Motor Control with

Microprocessor–Compatible Inputs

VS = Logic Supply Voltage

Must Have VCC > VS

E1, E2 = Logic Inputs

+

–

+

–

VCC

E2

E1

VS/2

R7

R1

Vin

R2

5.0

Ω

R5

R6

10 k

Rx

R3

0.1

µF

R8

10 k

+

–

+

–

VS

0.1

µF

10 k

10 k

10 k

10 k

Figure 9. Bidirectional Speed Control of DC Motors

For circuit stability, ensure that Rx >

where, RM = internal resistance of motor.

The voltage available at the terminals of the motor is:

where, |Ro| =

and IM is the motor current.

2R3

@ R1

RM

VM + 2(V1 –

VS

2

)

) |Ro| @ IM

2R3

@ R1

Rx

THERMAL INFORMATION

The maximum power consumption an integrated circuit

can tolerate at a given operating ambient temperature can be

found from the equation:

PD(TA) =

TJ(max)–TA

R

θJA (typ)

where, PD(TA) = power dissipation allowable at a given

operating ambient temperature.

This must be greater than the sum of the products of the

supply voltages and supply currents at the worst case

operating condition.

TJ(max)

= Maximum operating junction temperature

as listed in the maximum ratings section.

TA

= Maximum desired operating ambient

temperature.

R

θJA(typ) = Typical thermal resistance junction–to–

ambient.