8902–A

3-PHASE BRUSHLESS DC

MOTOR CONTROLLER/DRIVER

115 Northeast Cutoff, Box 15036

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

SERIAL PORT TIMING CONDITIONS

Limits

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

Charging

-9.0

-10

-11

µA

0.22

0.25

0.28

V

2.25

2.5

2.75

V

Max. FLL Oscillator Frequency

°C12

——

MHz

—

D3 = 0, D4 = 0

1.0

1.2

1.4

A

D3 = 0, D4 = 1

0.9

1.0

1.1

A

D3 = 1, D4 = 0

0.5

0.6

0.7

A

D3 = 1, D4 = 1

—

250

—

mA

BRAKE Threshold

1.5

1.75

2.0

V

BRAKE Hysteresis Current

—

20

—

µA

Transconductance Gain

0.42

0.50

0.58

A/V

Centertap Resistors

5.0

10

13

k

Ω

Back-EMF Hysteresis

—

5.0

20

37

mV

FCOM Transition

-5.0

-20

-37

mV

ELECTRICAL CHARACTERISTICS continued

DATA

CLOCK

Dwg. WP-019

A

C

B

D

C

D

CHIP SELECT

E

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