LT6600-10

6

6600f

to either or both input pins through identical external

differential outputs is 402

for the 2nd Filter Stage. Its value programs the common

mode voltage of the differential output of the filter. Pin 2

is a high impedance input, which can be driven from an

external voltage reference, or Pin 2 can be tied to Pin 7 on

the PC board. Pin 2 should be bypassed with a 0.01

µF

ceramic capacitor unless it is connected to a ground

plane.

3.3V or 5V supply (Pin 6 grounded) a quality 0.1

µF

ceramic bypass capacitor is required from the positive

supply pin (Pin 3) to the negative supply pin (Pin 6). The

bypass should be as close as possible to the IC. For dual

supply applications, bypass Pin 3 to ground and Pin 6 to

ground with a quality 0.1

µF ceramic capacitor.

the filter differential outputs. Each pin can drive a 100

Ω

and/or 50pF load to AC ground.

supply, see block diagram. For single supply operation the

capacitor to Pin 6. For dual supply operation, Pin 7 can be

bypassed or connected to a high quality DC ground. A

ground plane should be used. A poor ground will increase

noise and distortion. Pin 7 sets the output common mode

voltage of the 1st stage of the filter. It has a 5.5K

Ω

impedance, and it can be overridden with an external low

impedance voltage source.

BLOCK DIAGRA

PI FU CTIO S

–

+ –

+

–

–

+

+

402

Ω

402

Ω

200

Ω

200

Ω

200

Ω

200

Ω

1

2

3

4

11k

11k

8

7

6

5

OP AMP

PROPRIETARY

LOWPASS

FILTER STAGE

–

+

6600 BD