TS4657 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
TS4657
STMicroelectronics
TS4657 Datasheet PDF : 26 Pages
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Electrical characteristics
TS4657
Table 7. VCC = 5 V, Rload = 10 kΩ, Cload = 100 pF, T = 25° C (unless otherwise specified)
Symbol
Parameter
Min.
Typ.
Max.
Unit
Dynamic range; A-weighted
DR
16-bit data; measured at -60 dBFS, FS = 48 kHz, Fin = 1 kHz
88
93
dB
Signal-to-noise ratio, FS = 48 kHz, Fin = 1 kHz, referred to
output
SNR
Vin at -6 dBFS; A-weighted, 18-bit data input
Vin at -6 dBFS; unweighted, 18-bit data input
Vin at 0 dBFS; A-weighted, 16-bit data input
89
95
dB
93
93
THD+N
Total harmonic distortion and noise. Fin = 1 kHz
Vin at -20 dBFS
Vin at -6 dBFS
Vin at 0 dBFS
72
dB
74
82.5
81.5
PSRR
Power supply rejection ratio, Vripple = 200 mVpp
F= 217 Hz
F= 1 kHz
20 Hz < F < 20 kHz
80
dB
73
48
LRiso Channel separation. 1 kHz, Vin at 0 dBFS
Voo Output offset voltage
Gain channel balance
twu
Wake-up time(1)
1. See timing diagram in application information.
100
dB
-20
20
mV
-0.2
0.01
0.2
dB
3
4.5
6
ms
3.3.1
Terminology
SNR: signal-to-noise ratio is expressed in dB. The theoretical formula is:
SNRdB
=
10log
⎛
⎜
⎝
V---V--n---Ho---i-s1---e2---2-⎠⎟⎞
where Vnoise is the integrated noise from 20 Hz to 20 kHz and VH1 is the fundamental of the
signal.
For unweighted measurements, the SNR is given by:
∫ SNRdB
=
10log
-----------------------------V----H-----1---2-----------------------------
20kHz u(f)(vnoise(f)) 2df
20 H z
where vnoise is the noise spectral density and u(f) is the unweighted filter transfer function
(20 Hz, 20 kHz).
For A-weighted measurements:
∫ SNRdBA
=
10log
-----------------------------V----H-----1---2-----------------------------
20kHz A(f)(vnoise(f)) 2df
20 H z
where vnoise is the noise spectral density and A(f) is the A-weighted filter transfer function.
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