參數(shù)資料
型號(hào)： AD9629BCPZRL7-65
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 11/32頁(yè)
文件大?。?/td> 0K
描述： IC ADC 12BIT 65MSPS 32LFCSP
標(biāo)準(zhǔn)包裝： 1,500
位數(shù)： 12
采樣率（每秒）： 65M
數(shù)據(jù)接口： 串行，SPI?
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 86mW
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： 32-VFQFN 裸露焊盤(pán)，CSP
供應(yīng)商設(shè)備封裝： 32-LFCSP-VQ
包裝： 帶卷 (TR)
輸入數(shù)目和類型： 2 個(gè)單端，單極；1 個(gè)差分，單極
AD9629
Rev. 0 | Page 19 of 32
VOLTAGE REFERENCE
A stable and accurate 1.0 V voltage reference is built into the
AD9629. The VREF can be configured using either the internal
1.0 V reference or an externally applied 1.0 V reference voltage.
The various reference modes are summarized in the sections
that follow. The Reference Decoupling section describes the
best practices PCB layout of the reference.
Internal Reference Connection
A comparator within the AD9629 detects the potential at the
SENSE pin and configures the reference into two possible modes,
which are summarized in Table 10. If SENSE is grounded, the
reference amplifier switch is connected to the internal resistor
divider (see Figure 42), setting VREF to 1.0 V.
VREF
SENSE
0.5V
ADC
SELECT
LOGIC
0.1F
1.0F
VIN–
VIN+
ADC
CORE
08
54
0-
0
12
Figure 42. Internal Reference Configuration
If the internal reference of the AD9629 is used to drive multiple
converters to improve gain matching, the loading of the reference
by the other converters must be considered. Figure 43 shows
how the internal reference voltage is affected by loading.
0
–3.0
02
LOAD CURRENT (mA)
RE
F
E
RE
NCE
V
O
L
T
AG
E
RR
O
R
(
%
)
.0
–0.5
–1.0
–1.5
–2.0
–2.5
0.2
0.4
0.6
0.8
1.0
1.4
1.6
1.8
1.2
INTERNAL VREF = 0.996V
08
54
0-
0
14
Figure 43. VREF Accuracy vs. Load Current
External Reference Operation
The use of an external reference may be necessary to enhance
the gain accuracy of the ADC or improve thermal drift charac-
teristics. Figure 44 shows the typical drift characteristics of the
internal reference in 1.0 V mode.
4
3
2
1
0
–1
–2
–3
–4
–5
–6
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
V
RE
F
E
RRO
R
(
m
V
)
VREF ERROR (mV)
0
85
40
-05
2
Figure 44. Typical VREF Drift
When the SENSE pin is tied to AVDD, the internal reference is
disabled, allowing the use of an external reference. An internal
reference buffer loads the external reference with an equivalent
7.5 kΩ load (see Figure 27). The internal buffer generates the
positive and negative full-scale references for the ADC core.
Therefore, the external reference must be limited to a maximum
of 1.0 V.
Table 10. Reference Configuration Summary
Selected Mode
SENSE Voltage (V)
Resulting VREF (V)
Resulting Differential Span (V p-p)
Fixed Internal Reference
AGND to 0.2
1.0 internal
2.0
Fixed External Reference
AVDD
1.0 applied to external VREF pin
2.0
相關(guān)PDF資料
PDF描述
AD7575AQ IC ADC 8BIT LC2MOS W/HOLD 18CDIP
LTC1282BCSW#TRPBF IC A/D CONV SAMPLING W/REF24SOIC
LTC1278-4ISW#TR IC ADC 12BIT SAMPL SHTDWN 24SOIC
MS27656T17B26SA CONN RCPT 26POS WALL MNT W/SCKT
MS27505E17B35S CONN RCPT 55POS BOX MNT W/SCKT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD9629BCPZRL7-80 功能描述:IC ADC 12BIT 80MSPS 32LFCSP 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
AD9629XCPZ-40 功能描述:IC ADC 12BIT 40MSPS 制造商:analog devices inc. 系列:* 零件狀態(tài):上次購(gòu)買時(shí)間 標(biāo)準(zhǔn)包裝:1
AD9630 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Distortion 750 MHz Closed-Loop Buffer Amp
AD9630AN 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Distortion 750 MHz Closed-Loop Buffer Amp
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(xiě)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

*
*
*