Data Sheet

AD9645

Rev. 0 | Page 5 of 36

DIGITAL SPECIFICATIONS

AVDD = 1.8 V, DRVDD = 1.8 V, 2 V p-p differential input, 1.0 V internal reference, AIN = −1.0 dBFS, unless otherwise noted.

Table 3.

Parameter1

Temp

Min

Typ

Max

Unit

CLOCK INPUTS (CLK+, CLK−)

Logic Compliance

CMOS/LVDS/LVPECL

Differential Input Voltage2

Full

0.2

3.6

V p-p

Input Voltage Range

Full

AGND − 0.2

AVDD + 0.2

V

Input Common-Mode Voltage

Full

0.9

V

Input Resistance (Differential)

25°C

15

kΩ

Input Capacitance

25°C

4

pF

LOGIC INPUT (SCLK/DFS)

Logic 1 Voltage

Full

1.2

AVDD + 0.2

V

Logic 0 Voltage

Full

0

0.8

V

Input Resistance

25°C

30

kΩ

Input Capacitance

25°C

2

pF

LOGIC INPUT (CSB)

Logic 1 Voltage

Full

1.2

AVDD + 0.2

V

Logic 0 Voltage

Full

0

0.8

V

Input Resistance

25°C

26

kΩ

Input Capacitance

25°C

2

pF

LOGIC INPUT (SDIO/PDWN)

Logic 1 Voltage

Full

1.2

AVDD + 0.2

V

Logic 0 Voltage

Full

0

0.8

V

Input Resistance

25°C

26

kΩ

Input Capacitance

25°C

5

pF

LOGIC OUTPUT (SDIO/PDWN)3

Logic 1 Voltage (I

Full

1.79

V

Logic 0 Voltage (I

Full

0.05

V

DIGITAL OUTPUTS (D0x±, D1x±), ANSI-644

Logic Compliance

LVDS

Differential Output Voltage Magnitude (V

Full

290

345

400

mV

Output Offset Voltage (V

Full

1.15

1.25

1.35

V

Output Coding (Default)

Twos complement

DIGITAL OUTPUTS (D0x±, D1x±), LOW POWER,

REDUCED SIGNAL OPTION

Logic Compliance

LVDS

Differential Output Voltage Magnitude (V

Full

160

200

230

mV

Output Offset Voltage (V

Full

1.15

1.25

1.35

V

Output Coding (Default)

Twos complement