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參數(shù)資料
| 型號： | LTC1400IS8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | Complete SO-8, 12-Bit, 400ksps ADC with Shutdown |
| 中文描述： | 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SOP-8 |
| 文件頁數(shù)： | 8/20頁 |
| 文件大小： | 515K |
| 代理商： | LTC1400IS8 |
8
LTC1400
APPLICATIO
S I
N
FOR
ATIO
U
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
W
U
THD
V
V
V
1
Vn
V
=
+
+
+…
20
2
3
4
2
2
2
2
log
where V1 is the RMS amplitude of the fundamental fre-
quency and V2 through Vn are the amplitudes of the
second through nth harmonics. THD vs input frequency is
shown in Figure 4. The LTC1400 has good distortion
performance up to the Nyquist frequency and beyond.
Figure 2b. LTC1400 Nonaveraged, 4096 Point FFT
Plot with 200kHz Input Frequency in Bipolar Mode
FREQUENCY (kHz)
0
40
80 100
140
180
20
60
120
160
200
A
LTC1400 F02b
f
SAMPLE
= 400kHz
f
SINAD = 72.1dB
THD = –80dB
Figure 4. Distortion vs Input Frequency in
Bipolar Mode
INPUT FREQUENCY (Hz)
10k
A
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
100k
1M
LTC1400 F04
2ND HARMONIC
THD
3RD HARMONIC
f
SAMPLE
= 400kHz
Intermodulation Distortion
If the ADC input signal consists of more than one spectral
component, the ADC transfer function nonlinearity can
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 fa and fb are applied
to the ADC input, nonlinearities in the ADC transfer func-
tion can create distortion products at sum and difference
frequencies of mfa
±
nfb, where m and n = 0, 1, 2, 3, etc.
For example, the 2nd order IMD terms include (fa + fb) and
(fa – fb) while the 3rd order IMD terms includes (2fa + fb),
(2fa – fb), (fa + 2fb) and (fa – 2fb). If the two input sine
waves are equal in magnitude, the value (in decibels) of the
2nd order IMD products can be expressed by the following
formula.
20logAmplitude at (
IMD fa
fb
fa
fb
±
)
=
±
)
Amplitude at fa
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 expressed as:
Figure 3. Effective Bits and Signal-to-Noise +
Distortion vs Input Frequency in Bipolar Mode
INPUT FREQUENCY (Hz)
10k
E
S
12
11
10
9
8
7
6
5
4
3
2
1
0
74
68
62
56
50
100k
1M
LTC1400 F03
NYQUIST
FREQUENCY
f
SAMPLE
= 400kHz
where N is the effective number of bits of resolution and
S/(N + D) is expressed in dB. At the maximum sampling
rate of 400kHz, the LTC1400 maintains very good ENOBs
up to the Nyquist input frequency of 200kHz (refer to
Figure 3).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1400CS8 | Hex 2-Input OR Drivers 20-PDIP 0 to 70 |
| LTC1400I | Complete SO-8, 12-Bit, 400ksps ADC with Shutdown |
| LTC1400 | Complete SO-8, 12-Bit,400ksps ADC with Shutdown(SO-8封裝，12位,400ksps，模數(shù)轉(zhuǎn)換器（帶關(guān)斷）) |
| LTC1401C | Complete SO-8, 12-Bit, 200ksps ADC with Shutdown |
| LTC1401CS8 | Complete SO-8, 12-Bit, 200ksps ADC with Shutdown |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1400IS8#PBF | 功能描述:IC A/D CONV 12BIT W/SHTDN 8-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1 系列:microPOWER™ 位數(shù):8 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:- 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| LTC1400IS8#TR | 功能描述:IC ADC 12BIT 400KSPS SHTDN 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:- 標準包裝: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 |
| LTC1400IS8#TRPBF | 功能描述:IC A/D CONV 12BIT W/SHTDN 8-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝: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 |
| LTC1400IS8PBF | 制造商:Linear Technology 功能描述:ADC SAR 400ksps 12-Bit Serial SOIC8 |
| LTC1401CS8 | 功能描述:IC A/D CONV 12BIT W/SHTDN 8-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:2,500 系列:- 位數(shù):16 采樣率（每秒）:15 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:480µW 電壓電源:單電源 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數(shù)目和類型:16 個單端，雙極；8 個差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
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