MF10ACN datasheet(5/20 Pages) NSC

5 / 20 page

Typical Performance Characteristics (Continued)

vs Clock Frequency

fCLK fO Deviation

vs Clock Frequency

fCLK fO Deviation

Deviation of

fCLK

vs Nominal Q

Deviation of

fCLK

vs Nominal Q

TLH10399 – 3

Pin Descriptions

LP(120) BP(219) The second order lowpass bandpass

NAPHP(318)

and

notchallpasshighpass

outputs

These outputs can typically sink 15 mA

and source 3 mA Each output typically

swings to within 1V of each supply

INV(417)

The inverting input of the summing op-

amp of each filter These are high im-

pedance inputs but the non-inverting in-

put is internally tied to AGND making

INVA and INVB behave like summing

junctions (low impedance current in-

puts)

S1(516)

S1 is a signal input pin used in the all-

pass filter configurations (see modes 4

and 5) The pin should be driven with a

source impedance of less than 1 kX If

S1 is not driven with a signal it should be

tied to AGND (mid-supply)

SAB(6)

This pin activates a switch that connects

one of the inputs of each filter’s second

summer to either AGND (SAB tied to

Vb) or to the lowpass (LP) output (SAB

tied to Va) This offers the flexibility

needed for configuring the filter in its

various modes of operation

VAa(7)VDa(8)

Analog positive supply and digital posi-

tive supply These pins are internally

connected through the IC substrate and

therefore VAa and VDa should be de-

rived from the same power supply

source They have been brought out

separately so they can be bypassed by

separate capacitors

if desired

They

can be externally tied together and by-

passed by a single capacitor

VAb(14) VDb(13) Analog and digital negative supplies

The same comments as for VA

and

apply here

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