CS5451A

6

DS635F3

SWITCHING CHARACTERISTICS

•

Min/Max characteristics and specifications are guaranteed over all Operating Conditions.

•

Typical characteristics and specifications are measured at nominal supply voltages and TA = 25 °C.

•

VA+ = VD+ = 3 V ±10%; VA- = -2 V ±10%; AGND = DGND = 0 V. All voltages with respect to 0 V.

•

Logic Levels: Logic 0 = 0 V, Logic 1 = VD+

Notes:

6.

Specified using 10% and 90% points on wave-form of interest. Output loaded with 50 pF.

7.

Device parameters are specified with XIN = 4.096 MHz.

8.

Device parameters are specified with OWRS = 1.

9.

After SE is asserted, the states of SDO and SCLK are FSO is undefined.

Parameter

Symbol

Min

Typ

Max

Unit

Rise Times

Any Digital Input (except XIN)

(Note 6)

XIN only

Any Digital Output

-

-

-

-

-

50

1.0

10

-

µs

ns

ns

Fall Times

Any Digital Input (except XIN)

(Note 6)

XIN only

Any Digital Output

-

-

-

-

-

50

1.0

10

-

µs

ns

ns

Serial Port Timing

Serial Clock Frequency

OWRS = “0”

(Note 7)

OWRS = “1”

SCLK

SCLK

-

-

500

1000

-

-

kHz

kHz

Serial Clock

Pulse Width High

(Note 7 and 8)

Pulse Width Low

-

-

0.5

0.5

-

-

SCLK

SCLK

SCLK falling to New Data Bit

-

-

50

ns

FSO Falling to SCLK Rising Delay

(Note 7 & 8)

-0.5

-

SCLK

FSO Pulse Width

(Note 7 & 8)

-1

-

SCLK

SE Rising to Output Enabled

(Note 9)

-

-

50

ns

SE Falling to Output in Tri-state

-

-

50

ns

t

7

t

2

t

1

t

3

4

t

5

t

MSB(V1)

MSB(V1) - 1

LSB(I3)

SE

6

t

SDO

SCLK

FSO

Figure 1. Serial Port Timing