TLC32044C Datasheet, PDF (25/39 Pages) Texas Instruments – VOICE-BAND ANALOG INTERFACE CIRCUITS

TLC32044C, TLC32044E, TLC32044I, TLC32044M, TLC32045C, TLC32045I
VOICE-BAND ANALOG INTERFACE CIRCUITS
SLAS017F – MARCH 1988 – REVISED MAY 1995
low-pass filter transfer function^†, SCF f_clock = 288 kHz (see Note 9)
PARAMETER
TEST CONDITIONS
FREQUENCY RANGE ADJUSTMENT ADDEND‡
MIN TYP^§ MAX UNIT
f = 0 Hz to 3100 Hz
K1 × 0 dB
– 0.25
0 0.25
Filter gain,
TLC32044C,
TLC32044E,
TLC32044I
Input signal reference is 0 dB
f = 3100 Hz to 3300 Hz
f = 3300 Hz to 3650 Hz
f = 3800 Hz
f = 4000 Hz
f ≥ 4400 Hz
K1 × 0 dB
K1 × 0 dB
K1 × 2.3 dB
K1 × 2.7 dB
K1 × 3.2 dB
– 0.3
0 0.3
– 0.5
0 0.5
–3 –1
– 17 – 16
– 40
f ≥ 5000 Hz
K1 × 0 dB
– 65
f = 0 Hz to 3100 Hz
K1 × 0 dB
– 0.25
0 0.25
f = 3100 Hz to 3300 Hz
K1 × 0 dB
– 0.3
0 0.3
Filter gain,
TLC32044M
Input signal reference is 0 dB
f = 3300 Hz to 3500 Hz
f = 3800 Hz
f = 4000 Hz
K1 × 0 dB
K1 × 2.3 dB
K1 × 2.7 dB
– 0.5
0 0.5
– 3 – 0.5 dB
– 17 – 16
f ≥ 4400 Hz
K1 × 3.2 dB
– 40
f ≥ 5000 Hz
K1 × 0 dB
– 65
f = 0 Hz to 3100 Hz
K1 × 0 dB
– 0.25
0 0.25
f = 3100 Hz to 3300 Hz
K1 × 0 dB
– 0.3
0 0.3
Filter gain,
TLC32045C,
TLC32045I
Input signal reference is 0 dB
f = 3300 Hz to 3650 Hz
f = 3800 Hz
f = 4000 Hz
K1 × 0 dB
K1 × 2.3 dB
K1 × 2.7 dB
– 0.5
0 0.5
–3 –1
– 17 – 16
f ≥ 4400 Hz
K1 × 3.2 dB
– 40
f ≥ 5000 Hz
K1 × 0 dB
– 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.
serial port
PARAMETER
VOH High-level output voltage
VOL Low-level output voltage
II
Input current
Ci
Input capacitance
Co Output capacitance
† _{All typical values are at TA = 25°C.}
TEST CONDITIONS
IOH = – 300 µA
IOL = 2 mA
MIN TYP†
2.4
15
15
MAX
0.4
± 10
UNIT
V
V
µA
pF
pF
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