AD8321 datasheet(3/19 Pages) AD

3 / 19 page

AD8321

–3–

REV. 0

LOGIC INPUTS (TTL/CMOS Logic)

Parameter

Min

Typ

Max

Units

Logic “1” Voltage

2.1

5.0

Logic “0” Voltage

0.8

Logic “1” Current (VINH = 5 V) CLK, SDATA, DATEN

020

Logic “0” Current (VINL = 0 V) CLK, SDATA, DATEN

–600

–100

Logic “1” Current (VINH = 5 V) PD

190

µA

Logic “0” Current (VINL = 0 V) PD

–250

–30

µA

TIMING REQUIREMENTS

Parameter

Min

Typ

Max

Units

Clock Pulsewidth (TWH)

16.0

Clock Period (TC)

32.0

Setup Time SDATA vs. Clock (TDS)

5.0

Setup Time

DATEN vs. Clock (T

ES)

15.0

Hold Time SDATA vs. Clock (TDH)

5.0

Hold Time

DATEN vs. Clock (T

EH)

3.0

Input Rise and Fall Times, SDATA,

DATEN, Clock (T

R, TF)10

TES

VALID DATA WORD G1

MSB. . . .LSB

GAIN TRANSFER (G1)

TDS

TEH

8 CLOCK CYCLES

GAIN TRANSFER (G2)

TOFF

TGS

ANALOG

OUTPUT

SIGNAL AMPLITUDE (p-p)

PEDESTAL

CLK

SDATA

DATEN

TON

TWH

VALID DATA WORD G2

Figure 2. Serial Interface Timing

VALID DATA BIT

MSB

MSB-1

MSB-2

TDS

TDH

SDATA

CLK

Figure 3. SDATA Timing

(

DATEN, CLK, SDATA, V

CC = +9 V; Full Temperature Range)

(Full Temperature Range, VCC = +9 V, TR = TF = 4 ns, fCLK = 8 MHz unless otherwise noted.)

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