參數(shù)資料
型號： AD5263BRUZ20
廠商： Analog Devices Inc
文件頁數(shù)： 17/28頁
文件大?。?/td> 0K
描述： IC DGTL POT QUAD 20K 24-TSSOP
標準包裝： 62
接片： 256
電阻（歐姆）： 20k
電路數(shù)： 4
溫度系數(shù)： 標準值 30 ppm/°C
存儲器類型： 易失
接口： I²C，SPI（芯片選擇，設備位址）
電源電壓： 2.7 V ~ 5.5 V，5 V ~ 15 V
工作溫度： -40°C ~ 125°C
安裝類型： 表面貼裝
封裝/外殼： 24-TSSOP（0.173"，4.40mm 寬）
供應商設備封裝： 24-TSSOP
包裝： 管件
產(chǎn)品目錄頁面： 787 (CN2011-ZH PDF)
AD5263
Data Sheet
Rev. F | Page 24 of 28
8-BIT BIPOLAR DAC
Figure 60 shows a low cost, 8-bit, bipolar DAC. It offers the
same number of adjustable steps, but not the precision as compared
to conventional DACs. The linearity and temperature coefficient,
especially at low values codes, are skewed by the effects of the
digital potentiometer wiper resistance. The output of this circuit is
REF
O
V
D
V
×
=
1
256
2
(4)
03142-
059
A
B
A1
W
U1
VIN
GND
VO
1
VOUT
ADR425
+15V
TRIM
+5VREF
–5VREF
A2
VI
AD5263
OP2177
V–
V+
+15V
–15V
OP2177
V–
V+
Figure 60. 8-Bit Bipolar DAC
BIPOLAR PROGRAMMABLE GAIN AMPLIFIER
For applications requiring bipolar gain, Figure 61 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 the noninverting mode
allows linear gain and attenuation. The transfer function is
(
)
+
×
+
=
K
D2
R1
R2
V
I
O
1
256
1
(5)
where K is the ratio of RWB1/RWA1 set by U1.
03142-
060
A1
AD5263
W1
VO
A2
B2
VSS
VDD
U2
–KVI
B1
A1
C1
VI
R2
R1
AD5263
U1
W2
VDD
VSS
OP2177
V–
V+
OP2177
V–
V+
Figure 61. Bipolar Programmable Gain Amplifier
Similar to the previous example, in the simpler (and much more
usual) case where K = 1, a single channel is used and 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
(6)
If R2 is large, a compensation capacitor of a few pF may be
needed to avoid any gain peaking.
Table 10 shows the result of adjusting D, with A2 configured with
unity gain, gain of 2, and gain of 10. The result is a bipolar amplifier
with linearly programmable gain and 256-step resolution.
Table 10. Result of Bipolar Gain Amplifier
D
R1 = ∞, R2 = 0
R1 = R2
R2 = 9 × R1
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 adjustment, such as a
laser diode driver or tunable laser, a boosted voltage source can
be considered. See Figure 62.
03142-
061
+V
W
SIGNAL
CC
RBIAS
LD
VIN
A
B
VOUT
U1
AD5263
U3 2N7002
U2
–V
IL
AD8601
Figure 62. Programmable Booster Voltage Source
In this circuit, the inverting input of the op amp forces the VOUT to
be equal to the wiper voltage set by the digital potentiometer. The
load current is then delivered by the supply via the N-channel
FET, N1. N1 power handling must be adequate to dissipate power
equal to (VIN VOUT) × IL. This circuit can source a maximum of
100 mA with a 5 V supply. For precision applications, a voltage
reference such as ADR421 or ADR03 can be applied at the A
terminal of the digital potentiometer.
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參數(shù)描述
AD5263BRUZ20 制造商:Analog Devices 功能描述:DIG POT, QUAD, 256, 15V, 20KOHM, 24TSSOP; End To End Resistance:20kohm; Track Taper:Linear; Resistance Tolerance: 30%; Supply Voltage Min:4.5V; Supply Voltage Max:16.5V; Potentiometer IC Case Style:TSSOP; No. of Pins:24; No. of ;RoHS Compliant: Yes
AD5263BRUZ200 功能描述:IC POT QUAD 200K 256POS 24-TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 接片:256 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標準值 35 ppm/°C 存儲器類型:非易失 接口:3 線串口 電源電壓:2.7 V ~ 5.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應商設備封裝:8-TDFN-EP（3x3） 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:1399 (CN2011-ZH PDF) 其它名稱:MAX5423ETA+TCT
AD5263BRUZ200-R7 制造商:Analog Devices 功能描述:QUAD, 15 V, 256-POSITION DIGITAL POTENTIOMETER WITH PIN-SELE - Tape and Reel
AD5263BRUZ20-REEL7 功能描述:IC DGTL POT QUAD 20K 24-TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 接片:256 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標準值 35 ppm/°C 存儲器類型:非易失 接口:3 線串口 電源電壓:2.7 V ~ 5.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應商設備封裝:8-TDFN-EP（3x3） 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:1399 (CN2011-ZH PDF) 其它名稱:MAX5423ETA+TCT
AD5263BRUZ50 功能描述:IC POT QUAD 50K 256POS 24-TSSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 接片:256 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標準值 35 ppm/°C 存儲器類型:非易失 接口:3 線串口 電源電壓:2.7 V ~ 5.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應商設備封裝:8-TDFN-EP（3x3） 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:1399 (CN2011-ZH PDF) 其它名稱:MAX5423ETA+TCT
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