參數(shù)資料
型號(hào)： EVAL-AD7322CBZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 14/37頁(yè)
文件大?。?/td> 0K
描述： BOARD EVALUATION FOR AD7322
標(biāo)準(zhǔn)包裝： 1
系列： iCMOS®
ADC 的數(shù)量： 1
位數(shù)： 12
采樣率（每秒）： 1M
數(shù)據(jù)接口： 串行
輸入范圍： ±10 V
在以下條件下的電源（標(biāo)準(zhǔn)）： 30mW @ 1MSPS
工作溫度： -40°C ~ 85°C
已用 IC / 零件： AD7322
已供物品： 板，CD
相關(guān)產(chǎn)品： AD7322BRUZ-REEL-ND - IC ADC 12BIT+SAR 2CHAN 14-TSSOP
AD7322BRUZ-REEL7-ND - IC ADC 12BIT+ SAR 2CHAN 14TSSOP
AD7322BRUZ-ND - IC ADC 12BIT+ SAR 2CHAN 14TSSOP
AD7322
Data Sheet
Rev. B | Page 20 of 36
8
–8
6
4
2
0
–2
–4
–6
±2.5V
RANGE
±10V
RANGE
±10V
RANGE
±5V RANGE
±2.5V
RANGE
±5V RANGE
0V TO +10V
RANGE
0V TO +10V
RANGE
±16.5V VDD/VSS
±12V VDD/VSS
04863-
039
VCC = 5V
VREF = 2.5V
PSEU
D
O
I
N
PU
T
VO
L
T
A
G
E
R
A
N
G
E
(V)
Figure 40. Pseudo Input Range with VCC = 5 V
±2.5V
RANGE
±10V
RANGE
±10V
RANGE
±5V RANGE
±2.5V
RANGE
±5V RANGE
0V TO +10V
RANGE
0V TO +10V
RANGE
±16.5V VDD/VSS
±12V VDD/VSS
4
–8
2
0
–2
–4
–6
04863-
040
VCC = 3V
VREF = 2.5V
PSEU
D
O
I
N
PU
T
VO
L
T
A
G
E
R
A
N
G
E
(V)
Figure 41. Pseudo Input Range with VCC = 3 V
DRIVER AMPLIFIER CHOICE
In applications where the harmonic distortion and signal-to-
noise ratio are critical specifications, the analog input of the
AD7322 should be driven from a low impedance source. Large
source impedances significantly affect the ac performance of the
ADC and can necessitate the use of an input buffer amplifier.
When no amplifier is used to drive the analog input, the source
impedance should be limited to low values. The maximum source
impedance depends on the amount of THD that can be tolerated
in the application. The THD increases as the source impedance
increases and performance degrades. Figure 21 and Figure 22
show graphs of the THD vs. the analog input frequency for various
source impedances. Depending on the input range and analog
input configuration selected, the AD7322 can handle source
impedances of up to 4.7 k before the THD starts to degrade.
Due to the programmable nature of the analog inputs on the
AD7322, the choice of op amp used to drive the inputs is a
function of the particular application and depends on the input
configuration and the analog input voltage ranges selected.
The driver amplifier must be able to settle for a full-scale step to
a 13-bit level, 0.0122%, in less than the specified acquisition
time of the AD7322. An op amp such as the AD8021 meets this
requirement when operating in single-ended mode. The
AD8021 needs an external compensating NPO type of
capacitor. The AD8022 can also be used in high frequency
applications where a dual version is required.
For lower frequency applications, op amps such as the AD797,
AD845, and the AD8610 can be used in the AD7322 single-
ended mode configuration.
Differential operation requires that VIN+ and the VIN be simulta-
neously driven with two signals of equal amplitude that are 180°
out of phase. The common mode must be set up externally to the
AD7322. The common-mode range is determined by the REFIN/
OUT voltage, the VCC supply voltage, and the particular amplifier
used to drive the analog inputs. Differential mode with either an
ac input or a dc input provides the best THD performance over a
wide frequency range. Because not all applications have a signal
preconditioned for differential operation, there is often a need to
perform the single-ended-to-differential conversion.
This single-ended-to-differential conversion can be performed
using an op amp pair. Typical connection diagrams for an op
amp pair are shown in Figure 42 and Figure 43. In Figure 42 the
common-mode signal is applied to the noninverting input of
the second amplifier.
VIN
V+
V–
3k
1.5k
1.5k
1.5k
1.5k
10k
20k
VCOM
04863-
029
Figure 42. Single-Ended-to-Differential Configuration with the AD845
VIN
V+
V–
442
442
442
442
442
100
AD8021
442
04863-
030
Figure 43. Single-Ended-to-Differential Configuration with the AD8021
相關(guān)PDF資料
PDF描述
EEM31DTMS CONN EDGECARD 62POS R/A .156 SLD
0210490887 CABLE JUMPER 1.25MM .152M 19POS
GEM30DRMI CONN EDGECARD 60POS .156 SQ WW
EEM28DTKH CONN EDGECARD 56POS DIP .156 SLD
EVAL-AD7484CBZ BOARD EVALUATION FOR AD7484
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
EVAL-AD7323CB 制造商:AD 制造商全稱:Analog Devices 功能描述:500 kSPS, 4-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC
EVAL-AD7323CBZ 功能描述:BOARD EVALUATION FOR AD7323CBZ 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:iCMOS® 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-AD7324CB 制造商:AD 制造商全稱:Analog Devices 功能描述:4-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC
EVAL-AD7324CBZ 功能描述:BOARD EVALUATION FOR AD7324CBZ 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:iCMOS® 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-AD7327CB 制造商:AD 制造商全稱:Analog Devices 功能描述:500 kSPS, 8-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC
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

*
*
*