WM2638 データシートの表示（PDF） - Wolfson Microelectronics plc

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WM2638

Dual 12-Bit Serial Input Voltage Output DAC with Internal reference

Wolfson Microelectronics plc 

WM2638

SERIAL INTERFACE

NCS

SCLK

DIN

tSUCSS

tWCL tWCH

D15

tSUDCLK

D14

tHDCLK

D13

Production Data

tSUCS1

tSUCS2

D12

D11 D0

Figure 1 Timing Diagram

Test Conditions:

RL = 10kΩ, CL = 100pF. VDD = 5V ± 10%, VREF = 2.048V and VDD = 3V ± 10%, VREF = 1.024V over recommended operating free-

air temperature range (unless noted otherwise)

SYMBOL TEST CONDITIONS

MIN

tSUCSS

Setup time NCS low before SCLK low

10

Setup time, rising edge of SCLK to rising edge of NCS,

tSUSCS1

external end of write

10

Setup time, rising edge of SCLK to falling edge of NCS,

tSUSCS2

start of next write cycle

5

tWCL

Pulse duration, SCLK high

25

tWCH

Pulse duration, SCLK low

25

tSUDCLK

Setup time, data ready before SCLK falling edge

10

tHDCLK

Hold time, data held valid after SCLK falling edge

5

TYP

MAX

UNIT

ns

ns

ns

ns

ns

ns

ns

WOLFSON MICROELECTRONICS LTD

PD Rev 1.0 July 99

5

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