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參數(shù)資料
| 型號： | AD7824 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | High Speed 4-Channel 8-Bit ADC(四通道LC2MOS高速8位A/D轉(zhuǎn)換器) |
| 中文描述： | 高速4通道8位ADC（四通道LC2MOS高速8位的A / D轉(zhuǎn)換器） |
| 文件頁數(shù)： | 8/12頁 |
| 文件大小： | 273K |
| 代理商： | AD7824 |
AD7824/AD7828
REV. C
–8–
UNIPOLAR OPE RAT ION
T he analog input range for any channel of the AD7824/ AD7828
is 0 V to 5 V as shown in the unipolar operational diagram of Fig-
ure 10. Figure 11 shows the designed code transitions which
occur midway between successive integer L SB values (i.e.,
1/2 LSB, 3/2 LSB, 5/2 LSB, FS 3/2 LSBs). T he output code is
Natural Binary with 1 LSB = FS/256 = (5/256) V = 19.5 mV.
Figure 10. AD7824/AD7828 Unipolar 0 V to 5 V Operation
Figure 11. Ideal Input/Output Transfer Characteristic for
Unipolar 0 V to +5 V Operation
BIPOLAR OPE RAT ION
T he circuit of Figure 12 is designed for bipolar operation. An
AD544 op-amp conditions the signal input (V
IN
) so that only
positive voltages appear at AIN 1. T he closed loop transfer
function of the op amp for the resistor values shown is given
below:
AIN
1 = (2.5 – 0.625
)
Volts
T he analog input range is
±
4 V and the LSB size is 31.25 mV.
T he output code is complementary offset binary. T he ideal
input/output characteristic is shown in Figure 13.
Figure 12. AD7824/AD7828 Bipolar
±
4 V Operation
Figure 13. Ideal Input/Output Transfer Characteristic for
±
4 V Operation
T IMING AND CONT ROL
T he AD7824/AD7828 has two digital inputs for timing and
control. T hese are Chip Select (
CS
) and Read (
RD
). A READ
operation brings
CS
and
RD
low which starts a conversion on
the channel selected by the multiplexer address inputs (see
T able I). T here are two modes of operation as outlined by the
timing diagrams of Figures 14 and 15. Mode 0 is designed for
microprocessors which can be driven into a WAIT state. A
READ operation (i.e.,
CS
and
RD
are taken low) starts a con-
version and data is read when conversion is complete. Mode l
does not require microprocessor WAIT states. A READ opera-
tion initiates a conversion and reads the previous conversion
results.
T able I. T ruth T able for Input Channel Selection
AD7824
A1
AD7828
A1
A0
A2
A0
Channel
0
0
1
1
0
1
0
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
AIN 1
AIN 2
AIN 3
AIN 4
AIN 5
AIN 6
AIN 7
AIN 8
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| AD7834AR | 2.35V-5.25V, 12 bit, 1MSPS, Serial ADC 6-SOT-23 -40 to 125 |
| AD7834BN | 2.35V-5.25V, 12 bit, 1MSPS, Serial ADC 6-SC70 -40 to 125 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7824BCHIPS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single-Ended Data Acquisition System |
| AD7824BQ | 功能描述:IC ADC 8BIT LC2MOS 4CH HS 24CDIP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 其它有關(guān)文件:TSA1204 View All Specifications 標準包裝:1 系列:- 位數(shù):12 采樣率（每秒）:20M 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:155mW 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:48-TQFP 供應(yīng)商設(shè)備封裝:48-TQFP（7x7） 包裝:Digi-Reel® 輸入數(shù)目和類型:4 個單端，單極；2 個差分，單極 產(chǎn)品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6 |
| AD7824BQ/+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single-Ended Data Acquisition System |
| AD7824CQ | 功能描述:IC ADC 8BIT LC2MOS 4CH HS 24CDIP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝: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 個單端，雙極 |
| AD7824CQ/+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single-Ended Data Acquisition System |
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