AD8321 datasheet(3/20 Pages) AD

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AD8321

LOGIC INPUTS (TTL/CMOS Logic) (DATEN, CLK, SDATA, V

CC = +9 V; Full Temperature Range)

Parameter

Min

Typ

Max

Unit

Logic “1” Voltage

Logic “0” Voltage

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

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

Logic “1” Current (VINH = 5 V) PD

Logic “0” Current (VINL = 0 V) PD

2.1

–600

–250

5.0

0.8

–100

190

–30

TIMING REQUIREMENTS (Full Temperature Range, V

CC = +9 V, TR = TF = 4 ns, fCLK = 8 MHz unless otherwise noted.)

Parameter

Min

Typ

Max

Unit

Clock Pulsewidth (TWH)

Clock Period (TC)

Setup Time SDATA vs. Clock (TDS)

Setup Time

DATEN vs. Clock (T

ES)

Hold Time SDATA vs. Clock (TDH)

Hold Time

DATEN vs. Clock (T

EH)

Input Rise and Fall Times, SDATA,

DATEN, Clock (T

R, TF)

16.0

32.0

5.0

15.0

5.0

3.0

Specifications subject to change without notice.

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

REV. A

–3–

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