1

LTC1069-6

Single Supply, Very Low

Power, Elliptic Lowpass Filter

FEATURES

The LTC

pass filter optimized for single 3V or single 5V supply

operation. The LTC1069-6 typically consumes 1mA under

single 3V supply operation and 1.2mA under 5V operation.

The cutoff frequency of the LTC1069-6 is clock tunable and it

is equal to the clock frequency divided by 50. The input signal

is sampled twice per clock cycle to lower the risk of aliasing.

The typical passband ripple is

LTC1069-6 features progressive attenuation reaching 42dB

stopband attenuation is 72dB.

The LTC1069-6 can be clock tuned for cutoff frequencies

up to 20kHz (single 5V supply) and for cutoff frequencies

up to 14kHz (single 3V supply).

The low power feature of the LTC1069-6 does not penalize

the device’s dynamic range. With single 5V supply and an

+ THD) ratio is

≥70dB. The wideband noise of the

LTC1069-6 is 125

Other filter responses with higher speed can be obtained.

Please contact LTC Marketing for details.

The LTC1069-6 is available in an 8-pin SO package.

s

8th Order Elliptic Filter in SO-8 Package

s

Single 3V Operation: Supply Current: 1mA (Typ)

S/N Ratio: 72dB

s

Single 5V Operation: Supply Current: 1.2mA (Typ)

S/N Ratio: 79dB

s

s

s

s

s

Wide Dynamic Range, 75dB or More (S/N + THD),

Under Single 5V Operation

s

Wideband Noise: 120

s

s

Internal Sample Rate: 100:1

, LTC and LT are registered trademarks of Linear Technology Corporation.

s

Handheld Instruments

s

Telecommunication Filters

s

Antialiasing Filters

s

Smoothing Filters

s

Audio

s

Multimedia

Frequency Response

FREQUENCY (kHz)

5

–80

–70

–50

–40

–30

15

10

1069-6 TA02

–60

10

20

25

–20

–10

0

Single 3V Supply 10kHz Elliptic Lowpass Filter

AGND

NC

NC

CLK

LTC1069-6

3V

0.47

µF

0.1

µF

1069-6 TA01