
TLC32044C, TLC32044E, TLC32044I, TLC32044M TLC32045C, TLC32045I
VOICE-BAND ANALOG INTERFACE CIRCUITS
SLAS017F – MARCH 1988 – REVISED MAY 1995
24
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
delay distortion
bandpass filter transfer function, SCF f
clock
= 288 kHz IN+ – IN– is a
±
3 V sinewave
(see Note 9)
PARAMETER
TEST CONDITIONS
FREQUENCY RANGE
f
≤
50 Hz
f = 100 Hz
ADJUSTMENT ADDEND
K1
×
0 dB
K1
×
–0.26 dB
K1
×
0 dB
K1
×
0 dB
K1
×
0 dB
K1
×
2.3 dB
K1
×
2.7 dB
K1
×
3.2 dB
K1
×
0 dB
MIN
TYP
§
MAX
UNIT
–33
–29
–25
–4
–2
–1
f = 150 Hz to 3100 Hz
–0.25
0
0.25
Filter gain,
TLC32044C,
TLC32044E,
TLC32044I
f = 3100 Hz to 3300 Hz
–0.3
0
0.3
Input signal reference to 0 dB
f = 3300 Hz to 3650 Hz
–0.5
0
0.5
f = 3800 Hz
–3
–1
f = 4000 Hz
f
≥
4400 Hz
f
≥
5000 Hz
–17
–16
–40
–65
f
≤
50 Hz
f = 100 Hz
K1
×
0 dB
K1
×
–0.26 dB
K1
×
0 dB
K1
×
0 dB
K1
×
0 dB
K1
×
2.3 dB
K1
×
2.7 dB
K1
×
3.2 dB
K1
×
0 dB
–33
–29
–25
–4
–2
–1
f = 150 Hz to 3100 Hz
–0.25
0
0.25
Filter gain,
TLC32044M
f = 3100 Hz to 3300 Hz
–0.3
0
0.3
Input signal reference to 0 dB
f = 3300 Hz to 3500 Hz
–0.5
0
0.5
dB
f = 3800 Hz
–3
–0.5
f = 4000 Hz
f
≥
4400 Hz
f
≥
5000 Hz
–17
–16
–40
–65
f
≤
50 Hz
f = 100 Hz
K1
×
0 dB
K1
×
–0.26 dB
K1
×
0 dB
K1
×
0 dB
K1
×
0 dB
K1
×
2.3 dB
K1
×
2.7 dB
K1
×
3.2 dB
K1
×
0 dB
–33
–29
–25
–4
–2
–1
f = 150 Hz to 3100 Hz
–0.25
0
0.25
Filter gain,
TLC32045C,
TLC32045I
f = 3100 Hz to 3300 Hz
–0.3
0
0.3
Input signal reference to 0 dB
f = 3300 Hz to 3650 Hz
–0.5
0
0.5
f = 3800 Hz
–3
–1
f = 4000 Hz
f
≥
4400 Hz
f
≥
5000 Hz
–17
–16
–40
–65
See filter curves in typical characteristics
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 8.
§All typical values are at TA = 25
°
C.
NOTE 9: The filter gain outside of the passband is measured with respect to the gain at 1 kHz. The filter gain within the passband is measured
with respect to the average gain within the passband. The passbands are 150 to 3600 Hz and 0 to 3600 Hz for the bandpass 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.