參數(shù)資料
型號(hào): AD5171BRJZ5-R2
廠商: Analog Devices Inc
文件頁(yè)數(shù): 13/24頁(yè)
文件大?。?/td> 0K
描述: IC DGTL POT OTP 5K 12C SOT23-8
標(biāo)準(zhǔn)包裝: 1
接片: 64
電阻(歐姆): 5k
電路數(shù): 1
溫度系數(shù): 標(biāo)準(zhǔn)值 35 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: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: SOT-23-8
供應(yīng)商設(shè)備封裝: SOT-23-8
包裝: 標(biāo)準(zhǔn)包裝
配用: AD5171EVAL-ND - BOARD EVAL FOR AD5171
其它名稱: AD5171BRJZ5-R2DKR
AD5171
Rev. D | Page 20 of 24
For log taper adjustment, such as volume control, Figure 44
shows another way of resistance scaling. In this circuit, the
smaller the R2 with respect to RAB, the more it behaves like the
pseudo log taper characteristic. The wiper voltage is simply
I
WB
WA
WB
W
V
2
R
2
R
D
V
×
+
=
||
)
||
(
)
(
(6)
VI
R1
B
A
R2
VO
W
0
3
437
-04
4
Figure 44. Resistor Scaling with Log Adjustment Characteristics
RESOLUTION ENHANCEMENT
The resolution can be doubled in the potentiometer mode of
operation by using three digital potentiometers. Borrowed from
the Analog Devices patented RDAC segmentation technique,
users can configure three AD5171s to double the resolution (see
Figure 45). First, U3 must be parallel with a discrete resistor, RP,
which is chosen to be equal to a step resistance (RP = RAB/64).
Adjusting U1 and U2 together forms the coarse 6-bit adjustment,
and adjusting U3 alone forms the finer 6-bit adjustment. As a
result, the effective resolution becomes 12-bit.
U1
A1
B1
W1
U2
A2
B2
W3
W2
U3
A3
B3
RP
COARSE
ADJUSTMENT
FINE
ADJUSTMENT
03
43
7-
04
5
Figure 45. Doubling the Resolution
RDAC CIRCUIT SIMULATION MODEL
The internal parasitic capacitances and the external capacitive
loads dominate the ac characteristics of the digital potentiometers.
Configured as a potentiometer divider, the –3 dB bandwidth of
the AD5171 (5 kΩ resistor) measures 1.5 MHz at half scale.
Figure 14 to Figure 17 provide the large signal BODE plot
characteristics of the four available resistor versions: 5 kΩ,
10 kΩ, 50 kΩ, and 100 kΩ. A parasitic simulation model is
shown in Figure 46. Listing 1 provides a macro model net list
for the 10 kΩ device.
55pF
CA
25pF
CB
25pF
A
B
RDAC
10k
W
CW
034
37
-04
6
Figure 46. Circuit Simulation Model for RDAC = 10 kΩ
Listing 1. Macro Model Net List for RDAC
.PARAM D=64, RDAC=10E3
*
.SUBCKT DPOT (A,W,B)
*
CA
A
0
25E-12
RWA
A
W
{(1-D/64)*RDAC+60}
CW
W
0
55E-12
RWB
W
B
{D/64*RDAC+60}
CB
B
0
25E-12
*
.ENDS DPOT
相關(guān)PDF資料
PDF描述
VI-2NP-MX-B1 CONVERTER MOD DC/DC 13.8V 75W
ISL12028IV27Z IC RTC W/EEPROM 2.7V 14-TSSOP
AD5160BRJZ5-R2 IC POT DGTL 5K 256POS SOT23-8
VE-B3D-MY-F2 CONVERTER MOD DC/DC 85V 50W
VE-B3B-MY-F4 CONVERTER MOD DC/DC 95V 50W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD5171BRJZ5-R7 功能描述:IC DGTL POT OTP 5K SOT23-8 RoHS:是 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 供應(yīng)商設(shè)備封裝:8-TDFN(2x3) 包裝:帶卷 (TR)
AD5171EVAL 功能描述:BOARD EVAL FOR AD5171 RoHS:否 類別:編程器,開(kāi)發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電源管理,電池充電器 嵌入式:否 已用 IC / 零件:MAX8903A 主要屬性:1 芯鋰離子電池 次要屬性:狀態(tài) LED 已供物品:板
AD5172 制造商:AD 制造商全稱:Analog Devices 功能描述:256-Position One-Time Programmable Dual-Channel I2C Digital Potentiometers
AD5172BRM10 功能描述:IC POT DUAL 10K 256POS 10-MSOP 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 供應(yīng)商設(shè)備封裝:8-TDFN(2x3) 包裝:帶卷 (TR)
AD5172BRM100 功能描述:IC POT DUAL 100K 256POS 10-MSOP 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 供應(yīng)商設(shè)備封裝:8-TDFN(2x3) 包裝:帶卷 (TR)