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參數(shù)資料
| 型號： | LTC1196 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 8-Bit, SO-8,1MSPS ADCs(SO-8封裝，8位，1MSPS，模數(shù)轉(zhuǎn)換器（差分輸入）) |
| 中文描述： | 8位，SO - 8封裝，1MSPS模數(shù)轉(zhuǎn)換器（以SO - 8封裝，8位，1MSPS，模數(shù)轉(zhuǎn)換器（差分輸入）） |
| 文件頁數(shù)： | 22/28頁 |
| 文件大?。?/td> | 373K |
| 代理商： | LTC1196 |
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22
LTC1196/LTC1198
U
S
A
rate of 1.2MHz with a 5V supply the LTC1196 maintains
above 7.5 ENOBs at 400kHz input frequency. Above 500kHz
the ENOBs gradually decline, as shown in Figure 11, due
to increasing second harmonic distortion. The noise floor
remains low.
O
PPLICATI
U
U
produce intermodulation distortion (IMD) in addition to
THD. IMD is the change in one sinusoidal input caused by
the presence of another sinusoidal input at a different
frequency.
If two pure sine waves of frequencies f
a
and f
b
are applied
to the ADC input, nonlinearities in the ADC transfer func-
tion can create distortion products at sum and difference
frequencies of mf
a
±
nf
b
, where m and n = 0, 1, 2, 3, etc.
For example, the 2nd order IMD terms include (f
a
+ f
b
) and
(f
a
– f
b
) while 3rd order IMD terms include (2f
a
+ f
b
),
(2f
a
– f
b
), (f
a
+ 2f
b
), and (f
a
– 2f
b
). If the two input sine
waves are equal in magnitudes, the value (in dB) of the 2nd
order IMD products can be expressed by the following
formula:
IMD f
f
mplitude f
a
f
a
b
a
b
±
(
)
=
±
(
)
20log
amplitude at f
a
For input frequencies of 499kHz and 502kHz, the IMD of
the LTC1196/LTC1198 is 51dB with a 5V supply.
Peak Harmonic or Spurious Noise
The peak harmonic or spurious noise is the largest spec-
tral component excluding the input signal and DC. This
value is expressed in dBs relative to the RMS value of a full-
scale input signal.
Full-Power and Full-Linear Bandwidth
The full-power bandwidth is that input frequency at which
the amplitude of the reconstructed fundamental is re-
duced by 3dB for a full-scale input.
The full-linear bandwidth is the input frequency at which
the effective bits rating of the ADC falls to 7 bits. Beyond
this frequency, distortion of the sampled input signal
increases. The LTC1196/LTC1198 have been designed to
optimize input bandwidth, allowing the ADCs to
undersample input signals with frequencies above the
converters’ Nyquist Frequency.
Figure 11. Effective Bits and S/(N + D) vs Input Frequency
Total Harmonic Distortion
Total Harmonic Distortion (THD) is the ratio of the RMS
sum of all harmonics of the input signal to the fundamental
itself. The out-of-band harmonics alias into the frequency
band between DC and half of the sampling frequency. THD
is defined as:
THD
=
+
+
+
+
20log
V
V
V
V
V
2
2
3
2
4
2
N
2
1
...
where V
1
is the RMS amplitude of the fundamental fre-
quency and V
2
through V
N
are the amplitudes of the
second through the N
th
harmonics. The typical THD speci-
fication in the Dynamic Accuracy table includes the 2nd
through 5th harmonics. With a 100kHz input signal, the
LTC1196/LTC1198 have typical THD of 50dB and 49dB
with V
CC
= 5V and V
CC
= 3V, respectively.
Intermodulation Distortion
If the ADC input signal consists of more than one spectral
component, the ADC transfer function nonlinearity can
INPUT FREQUENCY (Hz)
1k
S
8
7
6
5
4
3
2
1
0
10k
100k
1M
1196/98 G24
50
44
E
V
=
V
= 2.7V
f
SMPL
= 383kHz (LTC1196)
f
SMPL
= 287kHz (LTC1198)
V
=
V
f
SMPL
= 1MHz (LTC1196)
f
SMPL
= 750kHz (LTC1198)
T
A
= 25°C
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1199 | 10-Bit, 500ksps ADCs with Auto Shutdown(5V,10位, 500ksps 模數(shù)轉(zhuǎn)換器（帶自動關(guān)斷）) |
| LTC1199L | 10-Bit, 500ksps ADCs with Auto Shutdown(2.7V,10位, 500ksps 模數(shù)轉(zhuǎn)換器（帶自動關(guān)斷）) |
| LTC1235 | Microprocessor Supervisory Circuit |
| LTC1235C | Microprocessor Supervisory Circuit |
| LTC1235CN | Microprocessor Supervisory Circuit |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1196_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:8-Bit, SO-8, 1Msps ADCs with Auto-Shutdown Options |
| LTC1196-1AC | 制造商:LINER 制造商全稱:Linear Technology 功能描述:8-Bit, SO-8, 1MSPS ADCs with Auto-Shutdown Options |
| LTC11961ACS8 | 制造商:Linear Technology 功能描述: |
| LTC1196-1ACS8 | 功能描述:IC A/DCONV 8BIT 1MHZ SAMPL 8SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
| LTC1196-1ACS8#PBF | 功能描述:IC A/DCONV 8BIT 1MHZ SAMPL 8SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
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