參數(shù)資料
型號(hào): LTC1411
廠商: Linear Integrated Systems
元件分類: ADC
英文描述: Single Supply 14-Bit 2.5Msps ADC
中文描述: 單電源14位2.5Msps模數(shù)轉(zhuǎn)換器
文件頁數(shù): 9/16頁
文件大小: 230K
代理商: LTC1411
9
LTC1411
1411f
Effective Number of Bits
The effective number of bits (ENOBs) is a measurement of
the resolution of an ADC and is directly related to the
S/(N + D) by the equation:
ENOB
S
= [S/(N + D) – 1.76]/6.02
where S/(N + D) is expressed in dB. At the maximum
sampling rate of 2.5MHz the LTC1411 maintains good
ENOBs up to the Nyquist input frequency of 1.25MHz.
Refer to Figure3.
Total Harmonic Distortion
Total harmonic distortion (THD) is the ratio of the RMS
sum of all harmonics of the input signal to the fundamental
APPLICATIOU
W
U
U
INPUT FREQUENCY (kHz)
0
–60
–40
0
1411 G14
–80
–100
–120
–140
–20
A
SINAD = 78.8dB
SFDR = 95dB
f
SAMPLE
= 2.5MHz
f
IN
= 100kHz
1000
250
500
750
1250
Figure 2a. LTC1411 Nonaveraged, 4096 Point FFT,
Input Frequency = 100kHz
itself. The out-of-band harmonics alias into the frequency
band between DC and half the sampling frequency. THD is
expressed as:
THD
V
V
V
V
V
N
=
+
+
+…
20
2
2
3
2
4
2
2
1
log
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 Nth harmonics. THD vs input frequency is
shown in Figure 4. The LTC1411 has good distortion
performance up to the Nyquist frequency and beyond.
FREQUENCY (kHz)
0
–40
–20
0
1000
1411 G15
–60
–80
250
500
750
1250
–100
–120
–140
A
SINAD = 75dB
SFDR = 81dB
f
SAMPLE
= 2.5MHz
f
IN
Figure 2b. LTC1411 4096 Point FFT,
Input Frequency = 1MHz
Figure 3. Effective Bits and Signal/(Noise + Distortion)
vs Input Frequency
INPUT FREQUENCY (kHz)
10
38
32
S
E
50
44
62
56
100
1000
10000
1411 TA02
26
20
14
86
80
74
68
10
14
13
12
11
Figure 4. Distortion vs Input Frequency
INPUT FREQUENCY (kHz)
10
–80
–90
D
–60
–70
–40
–50
100
1000
10000
1411 G03
–100
–110
0
–20
–30
–10
2ND
3RD
THD
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參數(shù)描述
LTC1411CG 功能描述:IC A/D CONV 14BIT 2.5MSPS 36SSOP 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 系列:- 位數(shù):14 采樣率(每秒):83k 數(shù)據(jù)接口:串行,并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散(最大):95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP(0.600",15.24mm) 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個(gè)單端,雙極
LTC1411CG#PBF 功能描述:IC ADC 14BIT 2.5MSPS 36SSOP 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 系列:- 位數(shù):14 采樣率(每秒):83k 數(shù)據(jù)接口:串行,并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散(最大):95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP(0.600",15.24mm) 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個(gè)單端,雙極
LTC1411CG#TR 功能描述:IC A/D CONV 14BIT 2.5MSPS 36SSOP 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 系列:- 位數(shù):14 采樣率(每秒):83k 數(shù)據(jù)接口:串行,并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散(最大):95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP(0.600",15.24mm) 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個(gè)單端,雙極
LTC1411CG#TRPBF 功能描述:IC A/D CONV 14BIT 2.5MSPS 36SSOP 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 系列:- 位數(shù):14 采樣率(每秒):83k 數(shù)據(jù)接口:串行,并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散(最大):95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP(0.600",15.24mm) 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個(gè)單端,雙極
LTC1411IG 功能描述:IC A/D CONV 14BIT 2.5MSPS 36SSOP 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 系列:- 位數(shù):14 采樣率(每秒):83k 數(shù)據(jù)接口:串行,并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散(最大):95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP(0.600",15.24mm) 供應(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個(gè)單端,雙極