- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9277 > AD8403AR100 (Analog Devices Inc)IC DGTL POT 8BIT 100K 4CH 24SOIC PDF資料下載
參數(shù)資料
| 型號： | AD8403AR100 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 17/32頁 |
| 文件大小： | 0K |
| 描述： | IC DGTL POT 8BIT 100K 4CH 24SOIC |
| 標準包裝： | 31 |
| 接片： | 256 |
| 電阻（歐姆）： | 100k |
| 電路數(shù)： | 4 |
| 溫度系數(shù)： | 標準值 500 ppm/°C |
| 存儲器類型： | 易失 |
| 接口： | 4 線 SPI（芯片選擇） |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-SOIC W |
| 包裝： | 管件 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁當前第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
AD8400/AD8402/AD8403
Rev. E | Page 24 of 32
APPLICATIONS
INVERTING GAIN (V/V)
256
128
0
0.1
1
10
96
64
32
160
192
224
DI
G
IT
A
L
CO
DE
(D
eci
mal
)
01
09
2-
05
3
The digital potentiometer (RDAC) allows many of the applica-
tions of a mechanical potentiometer to be replaced by a solid-
state solution offering compact size and freedom from vibration,
shock, and open contact problems encountered in hostile
environments. A major advantage of the digital potentiometer
is its programmability. Any settings can be saved for later recall
in system memory.
The two major configurations of the RDAC include the
potentiometer divider (basic 3-terminal application) and
the rheostat (2-terminal configuration) connections shown
Certain boundary conditions must be satisfied for proper
AD8400/AD8402/AD8403 operation. First, all analog signals
must remain within the GND to VDD range used to operate the
single-supply AD8400/AD8402/AD8403. For standard
potentiometer divider applications, the wiper output can be
used directly. For low resistance loads, buffer the wiper with
a suitable rail-to-rail op amp such as the OP291 or the OP279.
Second, for ac signals and bipolar dc adjustment applications,
a virtual ground is generally needed. Whichever method is used
to create the virtual ground, the result must provide the necessary
sink and source current for all connected loads, including
adequate bypass capacitance. Figure 41 shows one channel of
the AD8402 connected in an inverting programmable gain
amplifier circuit. The virtual ground is set at 2.5 V, which allows
the circuit output to span a ±2.5 V range with respect to virtual
ground. The rail-to-rail amplifier capability is necessary for the
widest output swing. As the wiper is adjusted from its midscale
reset position (80H) toward the A terminal (code FFH), the
voltage gain of the circuit is increased in successively larger
increments. Alternatively, as the wiper is adjusted toward the B
terminal (code 00H), the signal becomes attenuated. The plot in
Figure 54 shows the wiper settings for a 100:1 range of voltage
gain (V/V). Note the ±10 dB of pseudologarithmic gain around
0 dB (1 V/V). This circuit is mainly useful for gain adjustments
in the range of 0.14 V/V to 4 V/V; beyond this range the step
sizes become very large, and the resistance of the driving circuit
can become a significant term in the gain equation.
Figure 54. Inverting Programmable Gain Plot
ACTIVE FILTER
The state variable active filter is one of the standard circuits
used to generate a low-pass, high-pass, or band-pass filter.
The digital potentiometer allows full programmability of the
frequency, gain, and Q of the filter outputs. Figure 55 shows
the filter circuit using a 2.5 V virtual ground, which allows a
±2.5 VP input and output swing. RDAC2 and RDAC3 set the
LP, HP, and BP cutoff and center frequencies, respectively.
These variable resistors should be programmed with the same
data (as with ganged potentiometers) to maintain the best
Circuit Q. Figure 56 shows the measured filter response at the
band-pass output as a function of the RDAC2 and RDAC3
settings that produce a range of center frequencies from 2 kHz
to 20 kHz. The filter gain response at the band-pass output is
shown in Figure 57. At a center 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
RDAC1
VIN
B
A2
A3
A4
RDAC4
B
10k
Ω
10k
Ω
OP279 × 2
RDAC2
RDAC3
B
0.01
μF
0.01
μF
BAND-
PASS
HIGH-
PASS
LOW-
PASS
0
1
092-
054
Figure 55. Programmable State Variable Active Filter
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1100LU-50/T&R | IC DELAY LINE 5TAP 50NS 8-USOP |
| VE-25B-MY-F2 | CONVERTER MOD DC/DC 95V 50W |
| VE-J33-MZ | CONVERTER MOD DC/DC 24V 25W |
| VI-BNF-MY-F4 | CONVERTER MOD DC/DC 72V 50W |
| VI-BTN-MW-B1 | CONVERTER MOD DC/DC 18.5V 100W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8403AR100-REEL | 功能描述:IC POT DIG QUAD 100K 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:- 標準包裝:2,500 系列:XDCP™ 接片:256 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標準值 ±300 ppm/°C 存儲器類型: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) |
| AD8403AR10-REEL | 功能描述:IC POT DIG QUAD 10K 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:- 標準包裝:3,000 系列:DPP 接片:32 電阻（歐姆）:10k 電路數(shù):1 溫度系數(shù):標準值 300 ppm/°C 存儲器類型: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 供應(yīng)商設(shè)備封裝:8-TDFN（2x3） 包裝:帶卷 (TR) |
| AD8403AR1-REEL | 功能描述:IC POT DIG QUAD 1K 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:- 標準包裝:2,500 系列:XDCP™ 接片:256 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標準值 ±300 ppm/°C 存儲器類型: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) |
| AD8403AR50 | 制造商:Analog Devices 功能描述:Digital Potentiometer 256POS 50KOhm Quad 24-Pin SOIC W 制造商:Rochester Electronics LLC 功能描述:QUAD 8-BIT POTENTIOMETER - Bulk |
| 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:- 標準包裝:2,500 系列:XDCP™ 接片:256 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標準值 ±300 ppm/°C 存儲器類型: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) |
發(fā)布緊急采購，3分鐘左右您將得到回復。