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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)： | 12/20頁 |
| 文件大?。?/td> | 191K |
| 代理商： | TMC1185 |
TMC1185
PRODUCT SPECIFICATION
12
Timing Diagram
Notes:
1. “ ” indicates the portion of the waveform that will stretch out at slower sample rates.
2. t
must be 13ns minimum if no missing codes is desired only for the conditions of t
CONV
￡
28ns and f
IN
< 2MHz. Refer to the
Clock Requirements for a possible clock skew circuit for this condition.
Symbol
t
CONV
t
L
t
H
t
D
t
1
t
2
Description
Min
25
12
12
(2)
Typ
Max
100
m
s
Units
ns
ns
ns
ns
ns
ns
Convert Clock Period
Clock Pulse Low
Clock Pulse High
Aperture Delay
Data Hold Time, C
L
= 0pF
New Data Delay Time, C
L
= 15pF max
12.5
12.5
2
3.9
12.5
Track
Hold
"N"
Hold
"N + 1"
Hold
"N + 2"
Hold
"N + 3"
Hold
"N + 4"
Hold
"N + 5
"
Hold
"N + 6"
Track
DatN-7
DaN-6
INTERNAL
TRACK/HOLD
CONVERT
CLOCK
OUTPUT
DATA
t
D
t
2
t
1
DATA LATENCY
(6.5 Clock Cycles)
t
CONV
t
L
t
H
Track
Track
Track
Track
N-3
N-5
N-4
N-2
N-1
N
Track
65-1185-11
Track
Data Valid
(1)
Data Invalid
Applications Discussion
Driving the TMC1185
The TMC1185 has a differential input with a common-mode
of +2.25V. For AC-coupled applications, the simplest way to
create this differential input is to drive the primary winding
of a transformer with a single-ended input. A differential
output is created on the secondary if the center tap is tied to
the common-mode voltage (CM) of +2.25V per Figure 5.
This transformer-coupled input arrangement provides good
high frequency AC performance. It is important to select a
transformer that gives low distortion and does not exhibit
core saturation at full scale voltage levels. Since the trans-
former does not appreciably load the ladder, there is no need
to buffer the common-mode (CM) output in this instance.
In general, it is advisable to keep the current draw from the
CM output pin below 0.5
m
A to avoid nonlinearity in the
internal reference ladder. A FET input operational amplifier
such as the OPA130 can provide a buffered reference for
driving external circuitry. The analog IN and IN inputs
should be bypassed with 22pF capacitors to minimize
track/hold glitches and to improve high input frequency
performance.
Figure 5. AC-Coupled Single-Ended to Differential
Drive Circuit Using a Transformer
Figure 6 illustrates another possible low cost interface circuit
which utilizes resistors and capacitors in place of a trans-
former. Depending on the signal bandwidth, the component
values should be carefully selected in order to maintain the
performance outlined in the data sheet. The input capacitors,
C
IN
, and the input resistors, R
IN
, create a high-pass filter
with the lower corner frequency at f
C
= 1/(2
p
R
IN
C
IN
).
Mini-Circuits
T
T1-6-KK81
or equivalent
22
26
27
65-1185-12
CM
IN
IN
TMC1185
AC Input
Signal
22pF
22pF
0.1pF
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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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