R1, R2, R3 and R4 must be selected in relation to RIN to " />
參數(shù)資料
型號(hào): LTC2379HMS-18#PBF
廠商: Linear Technology
文件頁(yè)數(shù): 4/26頁(yè)
文件大?。?/td> 0K
描述: IC ADC 18BIT SPI/SRL 16MSOP
產(chǎn)品培訓(xùn)模塊: LTC2379- 18-/16-bit Fully-Differential SAR ADC Family Overview
標(biāo)準(zhǔn)包裝: 37
位數(shù): 18
采樣率(每秒): 1.6M
數(shù)據(jù)接口: 串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 21.5mW
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: 16-TFSOP(0.118",3.00mm 寬)
供應(yīng)商設(shè)備封裝: 16-MSOP
包裝: 管件
輸入數(shù)目和類型: 1 個(gè)差分,雙極
配用: DC1783A-E-ND - BOARD SAR ADC LTC2379-18
LTC2379-18
12
237918fa
R1, R2, R3 and R4 must be selected in relation to RIN to
achieve the desired attenuation and to maintain a balanced
input impedance in the first amplifier. Table 1 shows the
resulting SNR and THD for several values of RIN, R1, R2,
R3 and R4 in this configuration. Figure 6b shows the re-
sulting FFT when using the LT6350 as shown in Figure 6a.
Table 1. SNR, THD vs RIN for ±10V Single-Ended Input Signal.
RIN
(Ω)
R1
(Ω)
R2
(Ω)
R3
(Ω)
R4
(Ω)
SNR
(dB)
THD
(dB)
2k
499
2k
402
100.8
–99
10k
2.49k
10k
2k
100.5
–94
100k
24.9k
100k
20k
94.8
–96
Fully Differential Inputs
To achieve the full distortion performance of the
LTC2379-18, a low distortion fully differential signal source
driven through the LT6203 configured as two unity gain
buffers as shown in Figure 7 can be used to get the full
data sheet THD specification of –120dB.
APPLICATIONS INFORMATION
LT6350
R1 = 499Ω
R2 = 499Ω
R3 = 2k
R4 = 402Ω
VCM = VREF/2
VCM
237918 F06a
OUT1
RINT
RIN = 2k
OUT2
8
4
5
2
1
+
+
+
220pF
10μF
200pF
0V
5V
–10V
10V
0V
5V
Digital Gain Compression
The LTC2379-18 offers a digital gain compression (DGC)
feature which defines the full-scale input swing to be be-
tween 10% and 90% of the ±VREF analog input range. To
enable digital gain compression, bring the REF/DGC pin
low. This feature allows the LT6350 to be powered off of
a single +5.5V supply since each input swings between
0.5V and 4.5V as shown in Figure 8. Needing only one
Figure 6a. LT6350 Converting a ±10V Single-Ended Signal to
a ±5V Differential Input Signal
Figure 6b. 32k Point FFT Plot with fIN = 2kHz
for Circuit Shown in Figure 6a
Figure 7. LT6203 Buffering a Fully Differential Signal Source
–180
AMPLITUDE
(dBFS)
–60
–40
–20
–80
–100
–120
–140
–160
0
237918 F06b
SNR = 100.8dB
THD = –99.3dB
SINAD = 97.8dB
SFDR = 101.2dB
FREQUENCY (kHz)
0
100 200 300 400
800
700
600
500
LT6203
237918 F07
0V
5V
0V
5V
3
1
2
+
0V
5V
5
7
6
+
0V
5V
LT6350
VCM = VREF/2
237918 F05a
0V
5V
0V
5V
OUT1
RINT
OUT2
8
4
5
2
1
+
+
+
0V
5V
FREQUENCY (kHz)
0
100 200 300 400
800
700
600
500
–180
AMPLITUDE
(dBFS)
–60
–40
–20
–80
–100
–120
–140
–160
0
237918 F05b
SNR = 101dB
THD = –111.5dB
SINAD = 100.8dB
SFDR = 114.5dB
Figure 5a. LT6350 Converting a 0V-5V Single-Ended
Signal to a ±5V Differential Input Signal
Figure 5b. 32k Point FFT Plot with fIN = 2kHz
for Circuit Shown in Figure 5a
相關(guān)PDF資料
PDF描述
LTC2380HMS-16#TRPBF IC ADC 16BIT 2MSPS 16-MSOP
LTC2382HMS-16#PBF IC ADC 16BIT 1CH 500KSPS 16-MSOP
LTC2383HMS-16#PBF IC ADC 16BIT 1CH 1MSPS 16-MSOP
LTC2393IUK-16#TRPBF IC ADC 16BIT SER/PAR 1M 48-QFN
LTC2410IGN#TRPBF IC ADC 24BIT DIFF INP/REF 16SSOP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC2379IDE-18#PBF 功能描述:IC ADC 18BIT SPI/SRL 16DFN 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: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(gè)單端,單極 產(chǎn)品目錄頁(yè)面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6
LTC2379IDE-18#PBF-ES 制造商:Linear Technology 功能描述:18-BIT, 1.6MSPS, 101DB SNR, LO
LTC2379IDE-18#TRPBF 功能描述:IC ADC 18BIT SPI/SRL 16DFN 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
LTC2379IDE-18#TRPBF-ES 制造商:Linear Technology 功能描述:ADC Single SAR 1.6Msps 18-bit Serial 16-Pin DFN EP T/R
LTC2379IMS-18#PBF 功能描述:IC ADC 18BIT SPI/SRL 16MSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 其它有關(guān)文件:TSA1204 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:- 位數(shù):12 采樣率(每秒):20M 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:2 功率耗散(最大):155mW 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-TQFP 供應(yīng)商設(shè)備封裝:48-TQFP(7x7) 包裝:Digi-Reel® 輸入數(shù)目和類型:4 個(gè)單端,單極;2 個(gè)差分,單極 產(chǎn)品目錄頁(yè)面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6