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
f
≤ 100 Hz
K1
× 0 dB
– 33
– 29
– 25
f = 200 Hz
K1
× –0.26 dB
– 4
– 2
– 1
f = 300 Hz to 6200 Hz
K1
× 0 dB
– 0.25
0
0.25
Input signal
f = 6200 Hz to 6600 Hz
K1
× 0 dB
– 0.3
0
0.3
Filter gain
Input signal
reference is 0 dB
f = 6600 Hz to 7300 Hz
K1
× 0 dB
0
0.5
dB
reference is 0 dB
f = 7600 Hz
K1
× 2.3 dB
–2
– 0.5
f = 8000 Hz
K1
× 2.7 dB
– 16
– 14
f
≥ 8800 Hz
K1
× 3.2 dB
– 40
f
≥ 10000 Hz
K1
× 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
K1
× 0 dB
– 0.25
0
0.25
f = 6200 Hz to 6600 Hz
K1
× 0 dB
– 0.3
0
0.3
It il
f = 6600 Hz to 7300 Hz
K1
× 0 dB
– 0.5
0
0.5
Filter gain
Input signal
reference is 0 dB
f = 7600 Hz
K1
× 2.3 dB
– 2
– 0.5
dB
reference is 0 dB
f = 8000 Hz
K1
× 2.7 dB
– 16
– 14
f
≥ 8800 Hz
K1
× 3.2 dB
– 40
f
≥ 10000 Hz
K1
× 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.