TLC320AC02C_15 Datasheet, PDF (41/86 Pages) Texas Instruments – Single-Supply Analog Interface Circuit

3.5.2
VI(PP)
CMRR
ri
ADC Channel Input, V_DD = 5 V, Input Amplifier Gain = 0 dB (Unless Otherwise
Noted)
PARAMETER
TEST CONDITIONS
MIN TYP† MAX UNIT
Peak-to-peak input voltage (see Note 4)
Single-ended
Differential
3
V
6
V
ADC converter offset error
Band-pass filter selected
10 30 mV
Common-mode rejection ratio at IN +, IN –,
AUX IN +, AUX IN – (see Note 5)
55
dB
Input resistance at IN +, IN –, AUX IN +,
AUX IN –
100
kΩ
Squelch
DS03, DS02 = 0 in
register 4
60
dB
† _{All typical values are at VDD = 5 V and TA = 25°C.}
NOTES: 4. The differential range corresponds to the full-scale digital output.
5. Common-mode rejection ratio is the ratio of the ADC converter offset error with no signal and the ADC
converter offset error with a common-mode nonzero signal applied to either IN + and IN – together or
AUX IN + and AUX IN – together.
3.5.3 ADC Channel Signal-to-Distortion Ratio, V_DD = 5 V, f_s = 8 kHz (Unless
Otherwise Noted)
PARAMETER
TEST CONDITIONS
AV = 0 dB
MIN MAX
AV = 6 dB
AV = 12 dB
UNIT
MIN MAX MIN MAX
VI = – 6 dB to – 1 dB
64
—
—
VI = – 12 dB to – 6 dB
59
64
—
VI = – 18 dB to – 12 dB
56
59
64
ADC channel signal-to-
distortion ratio
VI = – 24 dB to – 18 dB
50
56
59
dB
(see Note 6)
VI = – 30 dB to – 24 dB
44
50
56
VI = – 36 dB to – 30 dB
38
44
50
VI = – 42 dB to – 36 dB
32
38
44
VI = – 48 dB to – 42 dB
26
32
38
NOTE 6: The analog-input test signal is a 1020-Hz sine wave with 0 dB = 6 V peak to peak as the reference level for
the analog-input signal.
3.5.4 DAC Channel Filter Transfer Function, FCLK = 144 kHz, f_s = 9.6 kHz, V_DD = 5 V
PARAMETER
TEST CONDITIONS MIN MAX UNIT
Gain relative to gain at fi = 1020 Hz (see Note 7)
fi < 200 Hz
0.15
fi = 200 Hz
– 0.5 0.2
fi = 300 Hz to 3 kHz – 0.15 0.2
fi = 3.3 kHz
– 0.35 0.03 dB
fi = 3.4 kHz
– 1 – 0.1
fi = 4 kHz
– 14
fi ≥ 4.6 kHz
– 32
NOTE 7: The input signal is the digital equivalent of a 1020-Hz sine wave (digital full scale = 0 dB). The nominal
differential DAC channel output with this input condition is 6 V peak to peak.
3–3