4

MD2134

Supertex inc.

www.supertex.com

Doc.# DSFP-MD2134

C102412

DAC Input and Output Description

MSB

DAC Value Register

LSB

PA or PB Output Current

D7

D6

D5

D4

D3

D2

D1

D0

0

0

0

0

0

0

0

0

(0/255)I

0

0

0

0

0

0

0

1

(1/255)I

0

1

1

1

1

1

1

1

(127/255)I

1

0

0

0

0

0

0

0

(128/255)I

1

1

1

1

1

1

1

0

(254/255)I

1

1

1

1

1

1

1

1

(255/255)I

AC Electrical Characteristics

Output Current Level Control Data Register LAx or LBx

MSB

Current Level Data Register LAx or LBx

LSB

Ratio of full scale

Output Polarity Control

D6

D5

D4

D3

D2

D1

D0

1

1

1

1

1

1

1

127/127

M3 = 0 output to PA

M3 = 1 output to PB

1

1

1

1

1

1

0

126/127

...

...

0

0

0

0

0

0

1

1/127

0

0

0

0

0

0

0

0

Sym

Parameter

Min

Typ

Max

Units Conditions

f

SCK

Serial clock maximum frequency

40

50

-

MHz ---

t

CSR

Clock input slew rate

1.0

-

-

V/ns

---

t

DSR

Control / data input slew rate

1.0

-

-

V/ns

---

THD

Total harmonic distortion

-

-45

-40

dB

---

t

EN-Off

EN fall to PA/PB turn-off time

-

5.0

8.0

ns

50% to 90%

t

EN-On

EN rise to PA/PB turn-on time

-

13.5

20.0

µs

50% to 10%