STLC7550TQFP Просмотр технического описания (PDF) - STMicroelectronics
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STLC7550TQFP Datasheet PDF : 17 Pages
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STLC7550
ELECTRICAL SPECIFICATIONS (continued)
Transmit Characteristics
Performance of the Tx channel
Typical values are given for AVDD = 3V, Tamb = 25°C and for nominal master clock MCLK = 1.536MHz,
differential mode and oversampling ratio = 160. Measurement band = 100Hz to 0.425 x Sampling frequency.
Symbol
Gabs
Ripple
THD
DR
CRxTx
Parameter
Absolute Gain at 1kHz
Ripple in Band : 0 to 0.425 x FS
Total Harmonic Distortion (differential Tx signal : VOUT = 1.25VPP, f = 1kHz)
Dynamic Range (f = 1kHz) (measured over the full 0 to FS/2 with a -20dBr
output signal and extrapolated to full scale) (see Note 2)
Crosstalk (transmit channel to receive channel)
Min. Typ. Max. Unit
-0.5 0 0.5 dB
±0.2
dB
-85 -92
dB
87
dB
85
dB
Smoothing filter transfer characteristics
The cut-off frequency of the single pole switch-capacitor low-pass filter following the DAC is :
fc−3dB
=
n ⋅ 32 ⋅ FS
2 ⋅ π ⋅ 10
with n = 2, 3, 4, 5, 6 (see paragraph Functional Description 1.2).
Receive Characteristics
Performance of the Rx channel
Typical values are given for AVDD =3V, Tamb = 25°C and for nominal master clock MCLK = 1.536MHz,
differential mode and oversampling ratio = 160. Measurement band = 100Hz to 0.425 x Sampling Frequency.
Symbol
Gabs
Ripple
THD
DR
PSRR
CTxRx
Parameter
Absolute Gain at 1kHz
Ripple in Band : 0 to 0.425 x FS
Total Harmonic Distortion (differential Rx signal : VIN = 1.25VPP, f = 1kHz)
Dynamic Range (f = 1kHz) (measured over the full 0 to FS/2 with a -20dBr
input and extrapolated to full scale) (see Note 2)
Power Supply Rejection Ratio (f = 1kHz, VAC = 200mVPP)
Crosstalk (transmit channel to receive channel)
Min. Typ. Max. Unit
-0.5 0 0.5 dB
±0.2
dB
-92
dB
87
dB
50
dB
85
dB
Note
2
:
The
dynamic
range
can
be
measured
in
bit
with
:
Nbit
=
DR − 1.76
6.02
with DR in dB.
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