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參數(shù)資料
| 型號(hào)： | tlc320ad56c |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Sigma-Delta Analog Interface Circuit(Sigma-Delta 模擬接口電路) |
| 中文描述： | sigma - delta模擬接口電路（Σ-Δ模擬接口電路） |
| 文件頁(yè)數(shù)： | 25/38頁(yè) |
| 文件大?。?/td> | 253K |
| 代理商： | TLC320AD56C |
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4–2
4.3
Electrical Characteristics Over Recommended Operating Free-Air
Temperature Range, DV
DD
= 5 V, AV
DD
= 5 V (Unless Otherwise Noted)
Digital Inputs and Outputs, MCLK = 4.096 MHz, f
s
= 8 kHz, Outputs Not Loaded
PARAMETER
TEST CONDITIONS
4.3.1
MIN
TYP
MAX
UNIT
VOH
VOL
IIH
IIL
Ci
Co
High-level output voltage, DOUT
IO = 360
μ
A
IO = 2 mA
VIH = 5 V
VIL = 0.8 V
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
4.3.2
Digital Inputs and Outputs, MCLK = 4.096 MHz, f
s
= 8 kHz, Outputs Not Loaded,
DV
DD
= 3 V
PARAMETER
TEST CONDITIONS
IO = 360
μ
A
Low-level output voltage, DOUT
MIN
TYP
MAX
UNIT
VOH
VOL
IIH
IIL
Ci
Co
High-level output voltage, DOUT
2
V
IO = 2 mA
VIH = 3.3 V
VIL = 0.6 V
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
4.3.3
ADC Path Filter, MCLK = 4.096 MHz, f
s
= 8 kHz (see Note 4)
PARAMETER
TEST CONDITIONS
0 to 300 Hz
MIN
–0.5
TYP
MAX
0.2
UNIT
Filter gain relative to gain at 1020 Hz
l i
l i
dB
300 Hz to 3 kHz
–0.35
0.2
3.3 kHz
–0.4
0.3
3.6 kHz
–3
4 kHz
≥
4.4 kHz
–40
–74
NOTE 4: 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 –1 dB pass
band is 0 to 3400 Hz for an 8-kHz sample rate. This pass band scales linearly with the sample rate.
4.3.4
ADC Dynamic Performance, MCLK = 4.096 MHz, f
s
= 8 kHz
4.3.4.1
ADC Signal-to-Noise (see Note 5)
PARAMETER
TEST CONDITIONS
VI = –1 dB
VI = –3 dB
VI = –6 dB
VI = –9 dB
VI = –40 dB
VI = –65 dB
VAUX = –9 dB
MIN
TYP
86
MAX
UNIT
Signal-to-noise ratio (SNR)
i (SNR)
i (SNR)
i (SNR)
dB
80
84
76
81
73
78
42
47
17
73
22
78
NOTE 5: The test condition is a 1020-Hz input signal with an 8-kHz conversion rate. Input and output voltages are
referred to AVDD/2.
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