using the test circuit" />
參數(shù)資料
型號(hào): LTC2413CGN#TR
廠商: Linear Technology
文件頁數(shù): 18/44頁
文件大小: 0K
描述: IC ADC 24BIT 50/60HZ MPWR 16SSOP
標(biāo)準(zhǔn)包裝: 2,500
位數(shù): 24
采樣率(每秒): 6.8
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(gè)差分,雙極
LTC2413
25
sn2413 2413fs
APPLICATIO S I FOR ATIO
WU
U
The effect of this input dynamic current can be analyzed
using the test circuit of Figure 17. The CPAR capacitor
includes the LTC2413 pin capacitance (5pF typical) plus
the capacitance of the test fixture used to obtain the results
shown in Figures 18 and 19. A careful implementation can
bring the total input capacitance (CIN + CPAR) closer to 5pF
thus achieving better performance than the one predicted
by Figures 18 and 19. For simplicity, two distinct situa-
tions can be considered.
Figure 16. LTC2413 Equivalent Analog Input Circuit
Figure 17. An RC Network at IN+ and IN
Figure 19. –FS Error vs RSOURCE at IN
+ or IN(Small CIN)
Figure 18. +FS Error vs RSOURCE at IN
+ or IN(Small CIN)
IIN
VV
V
R
IIN
VV
V
R
I REF
VV
V
R
V
VR
I REF
VV
V
R
V
VR
where
AVG
IN
INCM
REFCM
EQ
AVG
IN
INCM
REFCM
EQ
AVG
REF
INCM
REFCM
EQ
IN
REF
EQ
AVG
REF
INCM
REFCM
EQ
IN
REF
EQ
+
+
() = +
() = +
() =
+
() =
+
+
05
15
05
15
05
2
.
::
.
./
V
REF
V
REF
VIN
IN
V
IN
R
M
INTERNAL OSCILLATOR
R
f
EXTERNAL OSCILLATOR
REF
REFCM
IN
INCM
EQ
EOSC
=
+
=
=
()
+
2
397
0 555 1012
VREF+
VIN+
VCC
RSW (TYP)
20k
ILEAK
VCC
ILEAK
VCC
RSW (TYP)
20k
CEQ
18pF
(TYP)
RSW (TYP)
20k
ILEAK
IIN+
VIN
IIN
IREF+
IREF
2413 F16
ILEAK
VCC
ILEAK
SWITCHING FREQUENCY
fSW = 69900Hz INTERNAL OSCILLATOR
fSW = 0.5 fEOSC EXTERNAL OSCILLATOR
VREF
RSW (TYP)
20k
CIN
2413 F17
VINCM + 0.5VIN
RSOURCE
IN+
LTC2413
CPAR
20pF
CIN
VINCM – 0.5VIN
RSOURCE
IN
CPAR
20pF
RSOURCE ()
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
+FS
ERROR
(ppm
OF
V
REF
)
2413 F18
50
40
30
20
10
0
VCC = 5V
REF+ = 5V
REF = GND
IN+ = 5V
IN= 2.5V
FO = GND
TA = 25°C
CIN = 0.01F
CIN = 0.001F
CIN = 100pF
CIN = 0pF
RSOURCE ()
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
FS
ERROR
(ppm
OF
V
REF
)
2413 F19
0
–10
–20
–30
–40
–50
VCC = 5V
REF+ = 5V
REF = GND
IN+ = GND
IN= 2.5V
FO = GND
TA = 25°C
CIN = 0.01F
CIN = 0.001F
CIN = 100pF
CIN = 0pF
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