8905

3-PHASE BRUSHLESS DC

MOTOR CONTROLLER/DRIVER

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

Limits

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

0.80

0.85

0.95

V

2.4

2.75

3.0

V

Max. FLL Oscillator Frequency

—

—

MHz

10

—

MHz

—

—

±20

—

%

BRAKE Threshold

1.4

1.7

2.0

V

Transconductance Gain

0.26

0.35

0.50

A/V

Centertap Resistors

5.0

10

13

k

Ω

Back-EMF Hysteresis

—

152540

mV

FCOM Transition

-15

-25

-40

mV

ELECTRICAL CHARACTERISTICS continued

A. Minimum CHIP SELECT setup time before CLOCK rising edge ...... 100 ns

B. Minimum CHIP SELECT hold time after CLOCK rising edge ........... 150 ns

C. Minimum DATA setup time before CLOCK rising edge .................... 150 ns

D. Minimum DATA hold time after CLOCK rising edge ........................ 150 ns

E. Minimum CLOCK low time before CHIP SELECT .............................. 50 ns

F. Maximum CLOCK frequency ........................................................... 3.3 MHz

DATA

CLOCK

Dwg. WP-019

A

C

B

D

C

D

CHIP SELECT

E

SERIAL PORT TIMING CONDITIONS