參數(shù)資料
型號(hào): TLC320AD55C
廠商: Texas Instruments, Inc.
英文描述: Sigma-Delta Analog Interface Circuit(Sigma-Delta 模擬接口)
中文描述: sigma - delta模擬接口電路(Σ-Δ模擬接口)
文件頁數(shù): 29/41頁
文件大小: 256K
代理商: TLC320AD55C
4–3
4.4.3.3
ADC Signal-to-Distortion+Noise (see Note 5)
PARAMETER
TEST CONDITIONS
VI = –9 dB
VI = –1 dB
VI = –40 dB
VI = –65 dB
VI(AUXM, AUXP) = –9 dB
MIN
80
TYP
83
MAX
UNIT
Total harmonic distortion+noise (THD+N)
i di
i di
(THD N)
(THD N)
dB
72
76
40
45
14
20
72
77
NOTE 5: The test condition is a 1020 Hz input signal with an 8 kHz conversion rate. Input and output voltages are
referred to VDD/2.
4.4.4
ADC Channel
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Dynamic range
86
dB
Interchannel isolation
80
dB
Gain error
VI = –1 dB at 1020 Hz
INP = 3 V, INM = 2 V
±
0.5
dB
Gain error, dc
±
0.6
dB
Off-set error, ADC converter
8
mV
CMRR
Common-mode rejection ratio INM, INP or
AUXM, AUXP
VI = 0 dB at 1020 kHz
80
dB
Idle channel noise (on-chip reference)
50
μ
V rms
k
Ri
Input resistance
TA = 25
°
C
70
100
4.4.5
DAC Path Filter (see Note 6)
PARAMETER
TEST CONDITIONS
20 Hz
MIN
–0.5
TYP
0.08
MAX
0.15
UNIT
Fil
g
i
l i
i
1020 H
dB
200 Hz
–0.5
0.08
0.15
300 Hz to 3 kHz
–0.15
0.08
0.15
3.3 kHz
–0.35
0.11
0.3
g
3.4 kHz
–1
–.48
–0.1
4 kHz
4.6 kHz
–20
–14
–40
NOTE 6: The filter gain outside of the passband is measured with respect to the gain at 1020 Hz. The input signal is the
digital equivalent of a sine wave (digital full scale = 0 dB). The nominal differential DAC channel peak-to-peak
output voltage with this input condition is 6 V. The pass band is 0 to 3600 Hz.
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