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參數(shù)資料
型號(hào): AD8403AR50
廠商: ANALOG DEVICES INC
元件分類: 數(shù)字電位計(jì)
英文描述: 32-Tap. Nonvolatile. Linear-Taper Digital Potentiometers in SOT23
中文描述: QUAD 50K DIGITAL POTENTIOMETER, 3-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDSO24
封裝: MS-013AD, SOIC-24
文件頁(yè)數(shù): 16/20頁(yè)
文件大小: 496K
代理商: AD8403AR50
AD8400/AD8402/AD8403
–16–
REV. B
ACTIVE FILTER
One of the standard circuits used to generate a low-pass, high-
pass or bandpass filter is the state variable active filter. The digi-
tal potentiometer allows full programmability of the frequency,
gain and Q of the filter outputs. Figure 44 shows the filter cir-
cuit using a +2.5 V virtual ground, which allows a
±
2.5 V
P
input
and output swing. RDAC2 and 3 set the LP, HP and BP cutoff
and center frequencies respectively. These variable resistors
should be programmed with the same data (as with ganged po-
tentiometers) to maintain the best circuit Q. Figure 45 shows
the measured filter response at the bandpass output as a func-
tion of the RDAC2 and RDAC3 settings which produce a range
of center frequencies from 2 kHz to 20 kHz. The filter gain re-
sponse at the bandpass output is shown in Figure 46. At a cen-
ter frequency of 2 kHz, the gain is adjusted over a –20 dB to
+20 dB range determined by RDAC1. Circuit Q is adjusted by
RDAC4. For more detailed reading on the state variable active
filter, see Analog Devices’ application note, AN-318.
A1
A2
A3
A4
~
10k
RDAC4
10k
RDAC2
RDAC3
0.01μF
2.5V
0.01μF
RDAC1
V
IN
OP279
×
2
HIGH-
PASS
LOW-
PASS
BAND-
PASS
±
B
B
B
B
Figure 44. Programmable State Variable Active Filter
FREQUENCY – Hz
40
20
–8020
100k
100
1k
10k
0
–20
–40
–60
200k
A
–0.16
20.0000 k
Figure 45. Programmed Center Frequency Bandpass
Response
FREQUENCY – Hz
40
20
–80
20
100k
100
1k
10k
0
–20
–40
–60
200k
A
–19.01
2.00000 k
Figure 46. Programmed Amplitude Bandpass Response
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AD8403AR50-REEL 功能描述:IC POT DIG QUAD 50K 8BIT 24SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:XDCP™ 接片:256 電阻(歐姆):100k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 ±300 ppm/°C 存儲(chǔ)器類型:非易失 接口:I²C(設(shè)備位址) 電源電壓:2.7 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP(0.173",4.40mm 寬) 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR)
AD8403ARU1 功能描述:IC POT DIG QUAD 1K 8BIT 24TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:XDCP™ 接片:256 電阻(歐姆):100k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 ±300 ppm/°C 存儲(chǔ)器類型:非易失 接口:I²C(設(shè)備位址) 電源電壓:2.7 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP(0.173",4.40mm 寬) 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR)
AD8403ARU10 功能描述:IC DGTL POT 8BIT 10K 4CH 24TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:DPP 接片:32 電阻(歐姆):10k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 300 ppm/°C 存儲(chǔ)器類型:非易失 接口:3 線串行(芯片選擇,遞增,增/減) 電源電壓:2.5 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:8-TDFN(2x3) 包裝:帶卷 (TR)
AD8403ARU100 功能描述:IC POT DIG QUAD 100K 8B 24TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:DPP 接片:32 電阻(歐姆):10k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 300 ppm/°C 存儲(chǔ)器類型:非易失 接口:3 線串行(芯片選擇,遞增,增/減) 電源電壓:2.5 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:8-TDFN(2x3) 包裝:帶卷 (TR)
AD8403ARU100-REEL 功能描述:IC POT DIG QUAD 100K 8B 24TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:DPP 接片:32 電阻(歐姆):10k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 300 ppm/°C 存儲(chǔ)器類型:非易失 接口:3 線串行(芯片選擇,遞增,增/減) 電源電壓:2.5 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:8-TDFN(2x3) 包裝:帶卷 (TR)
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