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參數(shù)資料
| 型號： | STLC7550TQFP |
| 廠商： | 意法半導體 |
| 英文描述： | LOW POWER LOW VOLTAGE ANALOG FRONT END |
| 中文描述： | 低電壓低功耗模擬前端 |
| 文件頁數(shù)： | 13/17頁 |
| 文件大?。?/td> | 174K |
| 代理商： | STLC7550TQFP |
Transmit Characteristics
Performance of the Tx channel
Typical values are given for AV
DD
= 3V, T
amb
= 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
Parameter
Min.
-0.5
Typ.
0
±
0.2
-92
Max.
0.5
Unit
dB
dB
dB
Absolute Gain at 1kHz
Ripple in Band : 0 to 0.425 x FS
Total Harmonic Distortion (differential Tx signal : V
OUT
= 1.25V
PP
, 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)
-85
DR
87
dB
CRxTx
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 AV
DD
=3V, T
amb
= 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
Parameter
Min.
-0.5
Typ.
0
±
0.2
-92
Max.
0.5
Unit
dB
dB
dB
Absolute Gain at 1kHz
Ripple in Band : 0 to 0.425 x FS
Total Harmonic Distortion (differential Rx signal : V
IN
= 1.25V
PP
, 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, V
AC
= 200mV
PP
)
Crosstalk (transmit channel to receive channel)
DR
87
dB
PSRR
CTxRx
50
85
dB
dB
Note 2 : The dynamic range can be measured in bit with : N
bit
=
DR
1.76
6.02
with DR in dB.
ELECTRICAL SPECIFICATIONS
(continued)
STLC7550
13/17
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