VIN V
參數(shù)資料
型號(hào)： AD5280BRUZ50-REEL7
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 14/28頁(yè)
文件大?。?/td> 0K
描述： IC DGTL POT 50K +15V 14-TSSOP
標(biāo)準(zhǔn)包裝： 1,000
接片： 256
電阻（歐姆）： 50k
電路數(shù)： 1
溫度系數(shù)： 標(biāo)準(zhǔn)值 30 ppm/°C
存儲(chǔ)器類(lèi)型： 易失
接口： I²C（設(shè)備位址）
電源電壓： 4.5 V ~ 16.5 V，±4.5 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類(lèi)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)
其它名稱(chēng)： AD5280BRUZ50REEL7
AD5280/AD5282
Rev. C | Page 21 of
28
8-BIT BIPOLAR DAC
0
29
-05
8
VIN
VOUT
U1
A1
+5VREF
U2
VO
A2
U2 –
W
–15V
–5VREF
–15V
+
–
OP2177
+
–
OP2177
B
RR
A
V1
TRIM
ADR425
GND
AD5280
+15V
Figure 58. 8-Bit Bipolar DAC
Figure 58 shows a low cost, 8-bit, bipolar DAC. It offers the same
number of adjustable steps but not the precision of conventional
DACs. The linearity and temperature coefficients, especially at
low value codes, are skewed by the effects of the digital potenti-
ometer wiper resistance. The output of this circuit is
REF
O
V
×
=
1
256
D
2
(6)
BIPOLAR PROGRAMMABLE GAIN AMPLIFIER
02
92
9-
05
9
U2
U1
A2
V1
A1
B1
W2
A2
W1
VDD
A1
VDD
VS8
B2
V
VS8
O
R2
R1
C1
–kVI
V+
V–
+
–
OP2177
V+
V–
+
–
OP2177
AD5282
Figure 59. Bipolar Programmable Gain Amplifier
For applications that require bipolar gain, Figure 59 shows one
implementation similar to the previous circuit. The digital
potentiometer, U1, sets the adjustment range. The wiper voltage
at W2 can therefore be programmed between Vi and –KVi at a
given U2 setting. Configuring A2 in noninverting mode allows
linear gain and attenuation. The transfer function is
()
+
×
+
=
K
R1
V
i
O
1
256
1
D2
R2
V
(7)
where K is the ratio of RWB1/RWA1 set by U1.
As in the previous example, in the simpler and more common
case where K = 1, a single digital AD5280 potentiometer is
used. U1 is replaced by a matched pair of resistors to apply
Vi and Vi at the ends of the digital potentiometer. The
relationship becomes
i
O
V
D2
R1
R2
V
×
+
=
1
256
2
1
(7)
If R2 is large, a compensation capacitor having a few pF may be
needed to avoid any gain peaking.
Table 7 shows the result of adjusting D, with A2 configured as a
unity gain, a gain of 2, and a gain of 10. The result is a bipolar
amplifier with linearly programmable gain and a 256-step
resolution.
Table 7. Result of Bipolar Gain Amplifier
D
R1 = ∞, R2 = 0
R1 = R2
R2 = 9R1
0
1
2
10
64
0.5
1
5
128
0
192
0.5
1
5
255
0.968
1.937
9.680
PROGRAMMABLE VOLTAGE SOURCE WITH
BOOSTED OUTPUT
For applications that require high current adjustments, such as a
laser diode driver or tunable laser, a boosted voltage source can
be considered (see Figure 60).
02
92
9-
06
0
CC
VI
5V
U1 = AD5280
A1 = AD8501, AD8605, AD8541
N1 = FDV301N, 2N7002
U1
RBIAS
IL
N1
VO
V+
V–
+
–
A1
A
B
W
SIGNAL
LD
Figure 60. Programmable Booster Voltage Source
In this circuit, the inverting input of the op amp forces the
VBIAS to be equal to the wiper voltage set by the digital potenti-
ometer. The load current is then delivered by the supply via the
N-channel FET N1. The N1 power handling must be adequate
to dissipate (Vi – VO) × IL power. This circuit can source a
maximum of 100 mA with a 5 V supply. A1 needs to be a rail-
to-rail input type. For precision applications, a voltage reference
such as ADR423, ADR292, or AD1584 can be applied at the
input of the digital potentiometer.
相關(guān)PDF資料
PDF描述
DS1100Z-60 IC DELAY LINE 5TAP 60NS 8-SOIC
MS3100F22-27S CONN RCPT 9POS WALL MNT W/SCKT
AD5260BRUZ20-RL7 IC DCP 1CH 20K SPI 14-TSSOP TR
MS27468T17F6PA CONN RCPT 6POS JAM NUT W/PINS
AD5204BR10-REEL IC DGTL POT QUAD 256POS 24-SOIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD5280BRUZ50-REEL72 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Single/Dual,15 V/5 V,256-Position I2C-Compatible Digital Potentiometer
AD5282 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:+15V, I2C Compatible Digital Potentiometers
AD5282BRU20 功能描述:IC DUAL POT 20K 256POS 16-TSSOP RoHS:否 類(lèi)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(lèi)型:非易失 接口:3 線(xiàn)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(lèi)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)
AD5282BRU200 功能描述:IC DUAL POT 200K 256POS 16-TSSOP RoHS:否 類(lèi)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(lèi)型:非易失 接口:3 線(xiàn)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(lèi)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)
AD5282BRU200-REEL7 功能描述:IC DGTL POT DUAL 256POS 16-TSSOP RoHS:否 類(lèi)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(lèi)型:非易失 接口:3 線(xiàn)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(lèi)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)
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(xiě)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

*
*
*