參數(shù)資料
型號(hào)： EVAL-AD7609EDZ
廠商： Analog Devices Inc
文件頁數(shù)： 16/36頁
文件大?。?/td> 0K
描述： BOARD EVAL FOR AD7609
標(biāo)準(zhǔn)包裝： 1
ADC 的數(shù)量： 8
位數(shù)： 18
采樣率（每秒）： 200k
數(shù)據(jù)接口： DSP，MICROWIRE?，并聯(lián)，QSPI?，串行，SPI?
輸入范圍： ±10 V
在以下條件下的電源（標(biāo)準(zhǔn)）： 100mW @ 200kSPS
工作溫度： -40°C ~ 85°C
已用 IC / 零件： AD7609
已供物品： 板
Data Sheet
AD7609
Rev. A | Page 23 of 36
INTERNAL/EXTERNAL REFERENCE
The AD7609 contains an on-chip 2.5 V band gap reference. The
REFIN/REFOUT pin allows access to the 2.5 V reference that
generates the on-chip 4.5 V reference internally, or it allows an
external reference of 2.5 V to be applied to the AD7609. An
externally applied reference of 2.5 V is also amplified to 4.5 V using
the internal buffer. This 4.5 V buffered reference is the reference
used by the SAR ADC.
The REF SELECT pin is a logic input pin that allows the user to
select between the internal reference and the external reference.
If this pin is set to logic high, the internal reference is selected
and is enabled; if this pin is set to logic low, the internal refer-
ence is disabled and an external reference voltage must be
applied to the REFIN/REFOUT pin. The internal reference
buffer is always enabled. After a reset, the AD7609 operates in
the reference mode selected by the REF SELECT pin. Decoupling
is required on the REFIN/REFOUT pin for both the internal
or external reference options. A 10 F ceramic capacitor is
required on the REFIN/REFOUT to ground close to the
REFGND pins. The AD7609 contains a reference buffer
configured to amplify the REF voltage up to ~4.5 V, as shown
in Figure 38. The REFCAPA and REFCAPB pins must be
shorted together externally and a ceramic capacitor of 10 μF
applied to REFGND to ensure the reference buffer is in
closed-loop operation. The reference voltage available at the
REFIN/REFOUT pin is 2.5 V.
When the AD7609 is configured in external reference mode,
the REFIN/REFOUT pin is a high input impedance pin. For
applications using multiple AD7609 devices, the following
configurations are recommended depending on the application
requirements.
External Reference Mode
One ADR421 external reference can be used to drive the
REFIN/REFOUT pins of all AD7609 devices (see Figure 39). In
this configuration, each AD7609 REFIN/REFOUT pin should
be decoupled with a 100 nF decoupling capacitor.
Internal Reference Mode
One AD7609 device, configured to operate in the internal
reference mode, can be used to drive the remaining AD7609
devices, which are configured to operate in external reference
mode (see Figure 40). The REFIN/REFOUT pin of the AD7609,
configured in internal reference mode, should be decoupled
using a 10 F ceramic decoupling capacitor. The other AD7609
devices, configured in external reference mode, should use a
100 nF decoupling capacitor on their REFIN/REFOUT pins.
BUF
SAR
2.5V
REF
REFCAPB
REFIN/REFOUT
REFCAPA
10F
09760-
035
Figure 38. Reference Circuitry
AD7609
REF SELECT
REFIN/REFOUT
+
10F
AD7609
REF SELECT
REFIN/REFOUT
100nF
AD7609
REF SELECT
REFIN/REFOUT
100nF
VDRIVE
09760-
036
Figure 39. Single External Reference Driving Multiple AD7609
REFIN/REFOUT Pins
AD7609
REF SELECT
REFIN/REFOUT
AD7609
REF SELECT
REFIN/REFOUT
100nF
0.1F
100nF
AD7609
REF SELECT
REFIN/REFOUT
100nF
ADR421
09760-
037
Figure 40. Internal Reference Driving Multiple AD7609 REFIN Pins
相關(guān)PDF資料
PDF描述
VI-J1J-EY CONVERTER MOD DC/DC 36V 50W
UVR1V103MRD CAP ALUM 10000UF 35V 20% RADIAL
381LX332M050J022 CAP ALUM 3300UF 50V 20% SNAP
UVR1H682MRD CAP ALUM 6800UF 50V 20% RADIAL
0210490248 CABLE JUMPER 1.25MM .203M 18POS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
EVAL-AD7610CB 制造商:Analog Devices 功能描述:EVAL KIT FOR 16BIT, 250 KSPS, UNIPOLAR/BIPOLAR PROGRAMMABLE - Bulk
EVAL-AD7610CBZ 功能描述:BOARD EVALUATION FOR AD7610 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:PulSAR® 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
EVAL-AD7610EDZ 功能描述:BOARD EVAL FOR AD7610 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:* 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
EVAL-AD7612CB 制造商:Analog Devices 功能描述:EVAL BD FOR AD7612 - Bulk
EVAL-AD7612CBZ 功能描述:BOARD EVALUATION FOR AD7612 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:PulSAR® 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
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。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。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

我的聯(lián)系方式

*
*
*