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參數(shù)資料
| 型號： | TMC1185 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | 10-Bit, 40 Msps Sampling Analog-to-Digital Converter(10位,采樣速率40Msps,A/D轉(zhuǎn)換器) |
| 中文描述： | 10位，40 Msps的采樣模擬到數(shù)字轉(zhuǎn)換器（10位，40Msps采樣速率，的A / D轉(zhuǎn)換器） |
| 文件頁數(shù)： | 13/20頁 |
| 文件大?。?/td> | 191K |
| 代理商： | TMC1185 |
PRODUCT SPECIFICATION
TMC1185
13
The corner frequency can be reduced by either increasing the
value of R
IN
or C
IN
. If the circuit operates with a 50
W
or
75
W
impedance level, the resistors are fixed and only the
value of the capacitor can be increased. Usually AC-coupling
capacitors are electrolytic or tantalum capacitors with values
of 1
m
F or higher. It should be noted that these large capaci-
tors become inductive with increased input frequency, which
could lead to signal amplitude errors or oscillation. To main-
tain a low AC-coupling impedance throughout the signal
band, a small value (e.g. 1
m
F) ceramic capacitor could be
added in parallel with the polarized capacitor.
Capacitors C
SH1
and C
SH2
are used to minimize current
glitches resulting from the switching in the input track-and-
hold stage and to improve signal-to-noise performance.
These capacitors can also be used to establish a low-pass
filter and effectively reduce the noise bandwidth. In order to
create a real pole, resistors R
SER1
and R
SER2
were added in
series with each input. The cut-off frequency of the filter is
determined by f
C
= 1/(2
p
R
SER
(C
SH
+C
ADC
)) where R
SER
is the resistor in series with the input, C
SH
is the external
capacitor from the input to ground, and C
ADC
is the internal
input capacitance of the A/D converter (typically 4pF).
Resistors R
1
and R
2
are used to derive the necessary
common mode voltage from the buffered top and bottom
references. The total load of the resistor string should be
selected so that the current does not exceed 1mA. Although
the circuit in Figure 6 uses two resistors of equal value so
that the common mode voltage is centered between the top
Figure 6. AC-Coupled Differential Input Circuit
Figure 7. A Low Distortion DC-Coupled,
Single-Ended to Differential Input Driver Circuit
TMC1185
*R
49.9
R
3
1k
R
2
(6k
)
R
1
(6k
)
C
2
0.1
μ
F
C
22pF
C
22pF
C
3
0.1
μ
F
C
1
0.1
μ
F
C
IN
0.1
μ
F
V
CM
C
IN
0.1
μ
F
R
IN1
25
R
IN2
25
*R
49.9
+3.25V
Top Reference
+1.25V
Bottom Reference
IN
NOTE: * indicates optional component.
IN
65-1185-13
604
301
W
301
W
301
W
604
W
49.9
W
301
W
604
W
2.49k
W
2.49k
W
+2.25V
OPA642
OPA131
301
W
0.1
μ
F
OPA642
OPA642
+5V
–5V
+5V
65-1185-14
(2)
+5V
–5V
+5V
+5V
+5V
–5V
BAS16
(1)
BAS16
(1)
301
W
24.9
W
Input Level
Shift Buffer
Optional
High Impedance
Input Amplifier
DC-Coupled
Input Signal
26
IN
22 CM
27 IN
TMC1185
NOTES: (1) A Philips BAS16 diode or equivalent may be used.
(2) Supply bypassing not shown. (3) OPA620 or OPA650 may be
substituted. See "Driving the TMC1185" section.
22pF
22pF
604
W
W
0.1
μ
F
0.1
μ
F
(3)
(3)
(3)
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| TMC1203KLC40 | 功能描述:視頻模擬/數(shù)字化轉(zhuǎn)換器集成電路 Video a/D Converter Tripple 8Bit 4MSPS RoHS:否 制造商:Texas Instruments 輸入信號類型:Differential 轉(zhuǎn)換器數(shù)量:1 ADC 輸入端數(shù)量:4 轉(zhuǎn)換速率:3 Gbps 分辨率:8 bit 結(jié)構(gòu): 輸入電壓:3.3 V 接口類型:SPI 信噪比: 電壓參考: 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TCSP-48 封裝:Reel |
| TMC1203KLC40_Q | 功能描述:視頻模擬/數(shù)字化轉(zhuǎn)換器集成電路 Video a/D Converter Tripple 8Bit 4MSPS RoHS:否 制造商:Texas Instruments 輸入信號類型:Differential 轉(zhuǎn)換器數(shù)量:1 ADC 輸入端數(shù)量:4 轉(zhuǎn)換速率:3 Gbps 分辨率:8 bit 結(jié)構(gòu): 輸入電壓:3.3 V 接口類型:SPI 信噪比: 電壓參考: 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TCSP-48 封裝:Reel |
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