TLC32046MFKB datasheet(35/56 Pages) TI

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3–5

3.3.10

Receive Channel Band-Pass Filter Transfer Function, SCF fclock = 288 kHz,

Input (IN+ – IN –) Is A

±3-V Sine Wave‡ (see Note 9)

PARMETER

TEST

FREQUENCY

ADJUSTMENT

MIN

TYP†

MAX

UNIT

PARMETER

CONDITION

FREQUENCY

ADJUSTMENT

MIN

TYP†

MAX

UNIT

≤ 100 Hz

× 0 dB

– 33

– 29

– 25

f = 200 Hz

× –0.26 dB

– 4

– 2

– 1

f = 300 Hz to 6200 Hz

× 0 dB

– 0.25

0.25

Input signal

f = 6200 Hz to 6600 Hz

× 0 dB

– 0.3

0.3

Filter gain

Input signal

reference is 0 dB

f = 6600 Hz to 7300 Hz

× 0 dB

0.5

reference is 0 dB

f = 7600 Hz

× 2.3 dB

–2

– 0.5

f = 8000 Hz

× 2.7 dB

– 16

– 14

≥ 8800 Hz

× 3.2 dB

– 40

≥ 10000 Hz

× 0 dB

– 65

3.3.11

Receive and Transmit Channel Low-Pass Filter Transfer Function,

SCF fclock = 288 kHz (see Note 9)

TEST

FREQUENCY

ADJUSTMENT

MIN

TYP†

MAX

UNIT

CONDITION

RANGE

ADDEND‡

MIN

TYP†

MAX

UNIT

f = 0 Hz to 6200 Hz

× 0 dB

– 0.25

0.25

f = 6200 Hz to 6600 Hz

× 0 dB

– 0.3

0.3

It il

f = 6600 Hz to 7300 Hz

× 0 dB

– 0.5

0.5

Filter gain

Input signal

reference is 0 dB

f = 7600 Hz

× 2.3 dB

– 2

– 0.5

reference is 0 dB

f = 8000 Hz

× 2.7 dB

– 16

– 14

≥ 8800 Hz

× 3.2 dB

– 40

≥ 10000 Hz

× 0 dB

– 65

† All typical values are at TA = 25°C.

‡ The MIN, TYP, and MAX specifications are given for a 288-kHz SCF clock frequency. A slight error in the 288-kHz SCF

may result from inaccuracies in the MSTR CLK frequency, resulting from crystal frequency tolerances. If this frequency

error is less than 0.25%, the ADJUSTMENT ADDEND should be added to the MIN, TYP, and MAX specifications,

where K1 = 100

• [(SCF frequency – 288 kHz)/288 kHz]. For errors greater than 0.25%, see Note 9.

NOTE 9: The filter gain outside of the pass band is measured with respect to the gain at 1 kHz (2 kHz for M version).

The filter gain within the pass band is measured with respect to the average gain within the pass band. The

pass bands are 300 Hz to 7200 Hz and 0 to 7200 Hz for the band-pass and low-pass filters, respectively. For

switched-capacitor filter clocks at frequencies other than 288 kHz, the filter response is shifted by the ratio of

switched-capacitor filter clock frequency to 288 kHz.

TLC32046MFKB Datasheet(PDF) 35 Page - Texas Instruments

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