參數(shù)資料
型號(hào)： DC1011A-B
廠商： Linear Technology
文件頁(yè)數(shù)： 18/32頁(yè)
文件大小： 0K
描述： BOARD DELTA SIGMA ADC LTC2496
軟件下載： QuikEval System
設(shè)計(jì)資源： DC1011A Schematic
DC1011A Design Files
標(biāo)準(zhǔn)包裝： 1
系列： Easy Drive™, QuikEval™
ADC 的數(shù)量： 1
位數(shù)： 16
采樣率（每秒）： 6.9
數(shù)據(jù)接口： MICROWIRE?，串行，SPI?
已用 IC / 零件： LTC2496
已供物品： 板
相關(guān)產(chǎn)品： LTC2496CUHF#TRPBF-ND - IC ADC 16BIT DELTA SIG 38-QFN
LTC2496IUHF#TRPBF-ND - IC ADC 16BIT DELTA SIG 38-QFN
LTC2496CUHF#PBF-ND - IC ADC 16BIT DELTA SIG 38-QFN
LTC2496IUHF#PBF-ND - IC ADC 16BIT DELTA SIG 38-QFN
LTC2496
2496fb
applicaTions inForMaTion
Automatic Offset Calibration of External Buffers/
Amplifiers
In addition to the Easy Drive input current cancellation,
the LTC2496 enables an external amplifier to be inserted
between the multiplexer output and the ADC input, see
Figure 11. This is useful in applications where balanced
source impedances are not possible. One pair of external
buffers/amplifiers can be shared between all 17 analog
inputs.TheLTC2496preformsaninternaloffsetcalibration
every conversion cycle in order to remove the offset and
drift of the ADC. This calibration is performed through a
combination of front end switching and digital process-
ing. Since the external amplifier is placed between the
multiplexer and the ADC, it is inside this correction loop.
This results in automatic offset correction and offset drift
removal of the external amplifier.
The LTC6078 is an excellent amplifier for this function.
It operates with supply voltages as low as 2.7V and its
noise level is 18nV/√Hz. The Easy Drive input technology
of the LTC2496 enables an RC network to be added directly
to the output of the LTC6078. The capacitor reduces the
magnitude of the current spikes seen at the input to the
ADC and the resistor isolates the capacitor load from the
op-amp output enabling stable operation.
Reference Current
Similar to the analog inputs, the LTC2496 samples the
differential reference pins (REF+ and REF–) transferring
small amounts of charge to and from these pins, thus
producing a dynamic reference current. If incomplete set-
tling occurs (as a function the reference source resistance
andreferencebypasscapacitance)linearityandgainerrors
are introduced.
Forrelativelysmallvaluesofexternalreferencecapacitance
(CREF < 1nF), the voltage on the sampling capacitor settles
for reference impedances of many k
Ω (if CREF = 100pF up
to 10k
Ω will not degrade the performance), see Figures
12 and 13.
Figure 11. External Buffers Provide High Impedance Inputs and
Amplifier Offsets are Automatically Cancelled.
0.1F
–
+
–
+
1/2 LTC6078
1
2
3
5
6
7
∑ ADC
WITH
EASY DRIVE
INPUTS
INPUT
MUX
MUXOUTP
MUXOUTN
17
2496 F11
LTC2496
ANALOG
INPUTS
SDI
SCK
SDO
CS
1k
Figure 12. +FS Error vs RSOURCE at VREF (Small CREF)
Figure 13. –FS Error vs RSOURCE at VREF (Small CREF)
RSOURCE ( )
0
+FS
ERROR
(ppm)
50
70
90
10k
2496 F12
30
10
40
60
80
20
0
–10
10
100
1k
100k
VCC = 5V
VREF = 5V
VIN+ = 3.75V
VIN– = 1.25V
fO = GND
TA = 25°C
CREF = 0.01F
CREF = 0.001F
CREF = 100pF
CREF = 0pF
RSOURCE ( )
0
–FS
ERROR
(ppm) –30
–10
10
10k
2496 F13
–50
–70
–40
–20
0
–60
–80
–90
10
100
1k
100k
VCC = 5V
VREF = 5V
VIN+ = 1.25V
VIN– = 3.75V
fO = GND
TA = 25°C
CREF = 0.01F
CREF = 0.001F
CREF = 100pF
CREF = 0pF
相關(guān)PDF資料
PDF描述
EVAL-AD5501EBZ BOARD EVAL FOR AD5501
V24C48C50BL CONVERTER MOD DC/DC 48V 50W
V24C36C50BL CONVERTER MOD DC/DC 36V 50W
EVAL-AD5443EBZ BOARD EVAL FOR AD5433
DC1011A-A BOARD DELTA SIGMA ADC LTC2498
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DC1011A-C 功能描述:BOARD DELTA SIGMA ADC LTC2494 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:Easy Drive™, QuikEval™ 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件
DC-1012 制造商:BCM Advanced Research 功能描述:BCM NANO-ITX POWER BOARD - Bulk
DC1012080 WAF 制造商:ON Semiconductor 功能描述:
DC1012-103L 制造商:Coilcraft Inc 功能描述:Power inductor, 10% tol, RoHS
DC1012-104L 制造商:Coilcraft Inc 功能描述:Power inductor, 10% tol, RoHS
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*