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參數(shù)資料
| 型號： | 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)： | 28/41頁 |
| 文件大?。?/td> | 256K |
| 代理商： | TLC320AD55C |
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4–2
4.4
Electrical Characteristics, T
A
= 25
°
C, V
DD
(ADC) = V
DD
(DAC) = DV
DD
= 5 V,
MCLK = 16.384 MHz, Fk = 8 (unless otherwise noted)
Digital Inputs and Outputs, Outputs Not Loaded
4.4.1
PARAMETER
TEST CONDITIONS
IO = 360
μ
A
IO = 2 mA
VIH = 5 V
VIL = 0.8 V
MIN
TYP
MAX
UNIT
VOH
VOL
IIH
IIL
Ci
Co
4.4.2
High-level output voltage, DOUT
2.4
4.6
V
Low-level output voltage, DOUT
0.2
0.4
V
μ
A
μ
A
pF
High-level input current, any digital input
10
Low-level input current, any digital input
10
Input capacitance
5
Output capacitance
5
pF
ADC Path Filter (see Note 3)
PARAMETER
TEST CONDITIONS
20 Hz
MIN
–0.5
TYP
–0.15
MAX
0.2
UNIT
Filter gain relative to gain at 1020 Hz
l i
l i
l i
dB
200 Hz
–0.5
0.03
0.15
300 Hz to 3 kHz
–0.15
0
0.15
3.3 kHz
–0.35
–0.5
0.3
3.4 kHz
–1
–0.6
–0.1
4 kHz
≥
4.6 kHz
–20
–14
–40
NOTE 3: The filter gain outside of the passband is measured with respect to the gain at 1020 Hz. The analog input test
signal is a sine wave with 0 dB = 6 VI(PP) as the reference level for the analog input signal. The passband is
0 to 3400 Hz.
4.4.3
ADC Dynamic Performance
4.4.3.1
ADC Signal-to-Noise (see Note 4)
PARAMETER
TEST CONDITIONS
VI = –1 dB
VI = –9 dB
Signal-to-noise ratio (SNR)
VI = –40 dB
VI = –65 dB
VI(AUXM, AUXP) = –9 dB
NOTE 4: The test condition is the digital equivalent of a 1020 Hz input signal with an 8 kHz conversion rate. The load
impedance is 600
. Input and output voltages are referred to VDD/2.
4.4.3.2
ADC Signal-to-Distortion (see Note 4)
PARAMETER
TEST CONDITIONS
VI = –1 dB
VI = –9 dB
Signal-to-total harmonic distortion (THD)
VI = –40 dB
VI = –65 dB
VI(AUXM, AUXP) = –9 dB
NOTE 4: The test condition is the digital equivalent of a 1020 Hz input signal with an 8 kHz conversion rate. The load
impedance is 600
. Input and output voltages are referred to VDD/2.
MIN
80
TYP
85
MAX
UNIT
i (SNR)
i (SNR)
dB
72
77
40
45
14
21
72
78
MIN
80
TYP
92
MAX
UNIT
i di
i di
dB
80
94
40
60
15
40
80
92
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