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參數(shù)資料
| 型號(hào)： | AD7266ASU |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | Differential Input, Dual 2 MSPS, 12-Bit, 3-Channel SAR ADC |
| 中文描述： | DUAL 3-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQFP32 |
| 封裝： | MS-026ABA, TQFP-32 |
| 文件頁數(shù)： | 12/17頁 |
| 文件大小： | 752K |
| 代理商： | AD7266ASU |
AD7266
Preliminary Technical Data
TRANSFER FUNCTIONS
The designed code transitions occur at successive integer LSB
values (i.e., 1 LSB, 2 LSB, and so on). The LSB size is V
REF
/4096.
The ideal transfer characteristic for the AD7266 when straight
binary coding is output is shown in Figure 6, and the ideal
transfer characteristic for the AD7266 when twos complement
coding is output is shown in Figure 7.
0
000...000
111...111
1LSB = V
REF
/4096
1LSB
V
REF
– 1LSB
ANALOG INPUT
A
0V
000...001
000...010
111...110
111...000
011...111
Figure 6. Straight Binary Transfer Characteristic
0
100...000
011...111
1LSB = 2
×
V
REF
/4096
+V
REF
– 1 LSB
–V
REF
+ 1LSB V
REF
– 1LSB
ANALOG INPUT
A
100...001
100...010
011...110
000...001
000...000
111...111
Figure 7. Twos Complement Transfer Characteristic with V
REF
±V
REF
Input
Range
DIGITAL INPUTS
The digital inputs applied to the AD7266 are not limited by the
maximum ratings that limit the analog inputs. Instead, the
digital inputs applied can go to 7 V and are not restricted by the
V
DD
+ 0.3 V limit as on the analog inputs. See the Absolute
Maximum Ratings. Another advantage of SCLK, RANGE,
A0–A2, and CS not being restricted by the V
DD
+ 0.3 V limit is
that power supply sequencing issues are avoided. If one of these
digital inputs is applied before V
DD
, there is no risk of latch-up,
as there would be on the analog inputs if a signal greater than
0.3 V were applied prior to V
DD
.
V
DRIVE
The AD7266 also has the V
DRIVE
feature, which controls the
voltage at which the serial interface operates. V
DRIVE
allows the
ADC to easily interface to both 3 V and 5 V processors. For
example, if the AD7266 was operated with a V
DD
of 5 V, the
V
DRIVE
pin could be powered from a 3 V supply, allowing a large
dynamic range with low voltage digital processors. For example,
the AD7266 could be used with the 2 × V
REF
input range, with a
V
DD
of 5 V while still being able to interface to 3 V digital parts.
Rev. PrG | Page 12 of 17
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|---|---|
| AD7266BCP | 制造商:Analog Devices 功能描述:ADC Dual SAR 2Msps 12-bit Serial 32-Pin LFCSP EP 制造商:Rochester Electronics LLC 功能描述:DUAL, 2 MSPS, 3-CH SIMULTANEOUS SAMPLING ADC - Bulk |
| AD7266BCP-U1 | 制造商:Analog Devices 功能描述: |
| AD7266BCPZ | 功能描述:IC ADC 12BIT 3CH 2MSPS 32-LFCSP 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:microPOWER™ 位數(shù):8 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:- 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個(gè)單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
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| AD7266BCPZ-REEL7 | 功能描述:IC ADC 12BIT 2MSPS 3CH 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:microPOWER™ 位數(shù):8 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:- 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個(gè)單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
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