Figure 15. An RC Network at IN
參數(shù)資料
型號: LTC2435CGN#TRPBF
廠商: Linear Technology
文件頁數(shù): 20/42頁
文件大?。?/td> 0K
描述: IC ADC DIFF I/REF 20BIT 16-SSOP
標(biāo)準(zhǔn)包裝: 2,500
位數(shù): 20
采樣率(每秒): 15
數(shù)據(jù)接口: MICROWIRE?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 2
功率耗散(最大): 1mW
電壓電源: 單電源
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 16-SSOP(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 16-SSOP
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 1 個差分,雙極
LTC2435/LTC2435-1
27
24351fc
For more information www.linear.com/LTC2435
applicaTions inForMaTion
Figure 15. An RC Network at IN+ and IN
Figure 16. +FS Error vs RSOURCE at IN+ or IN(Small CIN)
Figure 17. –FS Error vs RSOURCE at IN+ or IN(Small CIN)
CIN
2435 F19
VINCM + 0.5VIN
RSOURCE
IN+
LTC2435/
LTC2435-1
CPAR
20pF
CIN
VINCM – 0.5VIN
RSOURCE
IN
CPAR
20pF
RSOURCE (W)
1
+FS
ERROR
VARIATION
(ppm)
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
10000
2435 F16
10
100
1000
100000
CIN = 0pF
CIN = 100pF
CIN = 0.01μF
CIN = 0.001μF
VCC = 5V
VREF+ = 5V
VREF– = GND
VIN+ = 3.75V
VIN– = 1.25V
FO = GND
TA = 25°C
RSOURCE (W)
1
–FS
ERROR
VARIATION
(ppm)
100
90
80
70
60
50
40
30
20
10
0
–10
10000
2435 F17
10
100
1000
100000
CIN = 0pF
CIN = 0.01μF
VCC = 5V
VREF+ = 5V
VREF– = GND
VIN+ = 1.25V
VIN– = 3.75V
FO = GND
TA = 25°C
CIN = 100pF
CIN = 0.001μF
the sampling charge transfers when integrated over a
substantial time period (longer than 64 internal clock
cycles).
The effect of this input dynamic current can be analyzed
using the test circuit of Figure 15. The CPAR capacitor
includes the LTC2435/LTC2435-1 pin capacitance
(5pF typical) plus the capacitance of the test fixture
used to obtain the results shown in Figures 16 and
17. A careful implementation can bring the total input
capacitance (CIN + CPAR) closer to 5pF thus achieving
better performance than the one predicted by Figures
16 and 17. For simplicity, two distinct situations can
be considered.
For relatively small values of input capacitance (CIN <
0.01F), the voltage on the sampling capacitor settles
almostcompletelyandrelativelylargevaluesforthesource
impedance result in only small errors. Such values for CIN
will deteriorate the converter offset and gain performance
without significant benefits of signal filtering and the user
is advised to avoid them. Nevertheless, when small val-
ues of CIN are unavoidably present as parasitics of input
multiplexers, wires, connectors or sensors, the LTC2435/
LTC2435-1 can maintain their exceptional accuracy while
operating with relative large values of source resistance
as shown in Figures 16 and 17. These measured results
may be slightly different from the first order approxima-
相關(guān)PDF資料
PDF描述
LTC2442IG#PBF IC ADC 24BIT 4CH 36-SSOP
LTC2446IUHF#TRPBF IC ADC 24BIT 8CH HI SPEED 38QFN
LTC2448IUHF#TRPBF IC ADC 24BIT HI SPEED 38QFN
LTC2451ITS8#TRPBF IC ADC 16BIT DELTA SIG TSOT23-8
LTC2452ITS8#TRPBF IC ADC 16BIT DELTA SIG TSOT23-8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC2435IGN 功能描述:IC CONV A/D 20BIT DIFF 16-SSOP 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: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
LTC2435IGN#PBF 功能描述:IC ADC DIFF I/REF 20BIT 16-SSOP 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: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
LTC2435IGN#TR 功能描述:IC CONV A/D 20BIT DIFF 16-SSOP 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
LTC2435IGN#TRPBF 功能描述:IC ADC DIFF I/REF 20BIT 16-SSOP 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
LTC2436-1CGN 功能描述:IC ADC 2CH DIFF-IN 16BIT 16SSOP 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: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