Data Sheet

AD6649

Rev. C | Page 7 of 40

Parameter

Temperature

Min

Typ

Max

Unit

LOGIC INPUTS (OEB, PDWN)3

High Level Input Voltage

Full

1.22

2.1

V

Low Level Input Voltage

Full

0

0.6

V

High Level Input Current

Full

45

70

µA

Low Level Input Current

Full

−5

+5

µA

Input Resistance

Full

26

kΩ

Input Capacitance

Full

5

pF

DIGITAL OUTPUTS

FDA and FDB

High Level Output Voltage

Full

1.79

V

Full

1.75

V

Low Level Output Voltage

Full

0.2

V

Full

0.05

V

LVDS Data and OR Outputs

Full

250

350

450

mV

ANSI Mode

Full

1.15

1.22

1.35

V

Full

150

200

280

mV

Reduced Swing Mode

Full

1.15

1.22

1.35

V

1

A −1.0 dBFS input level at the analog inputs corresponds to an output level of −2.5 dBFS when using the fixed-frequency NCO and 95 MHz FIR filter. When using the

tunable-frequency NCO and 100 MHz FIR filter, the output level is −1.3 dBFS. These respective output level reductions are due to FIR filter losses. See the FIR Filters

section for more details.

2

Pull-up.

3

Pull-down.