- 您现在的位置：买卖IC网 > PDF目录16242 > AD5171EVAL (Analog Devices Inc)BOARD EVAL FOR AD5171 PDF资料下载
参数资料
| 型号： | AD5171EVAL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/24页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR AD5171 |
| 标准包装： | 1 |
| 主要目的： | 数字电位器 |
| 已用 IC / 零件： | AD5171 |
| 已供物品： | 板 |
| 相关产品： | AD5171BRJZ5-R2DKR-ND - IC DGTL POT OTP 5K 12C SOT23-8 AD5171BRJZ50-R2DKR-ND - IC DGTL POT OTP 50K I2C SOT23-8 AD5171BRJZ10-R2DKR-ND - IC DGTL POT OTP 10K I2C SOT23-8 AD5171BRJZ100R2DKR-ND - IC DGTL POT OTP 100K I2C SOT23-8 AD5171BRJZ5-R7-ND - IC DGTL POT OTP 5K SOT23-8 AD5171BRJZ50-R7-ND - IC DGTL POT OTP 50K SOT23-8 AD5171BRJZ100-R7-ND - IC DGTL POT OTP 100K SOT23-8 AD5171BRJZ10-R7-ND - IC DGTL POT OTP 10K SOT23-8 AD5171BRJZ50-R2CT-ND - IC DGTL POT OTP 50K I2C SOT23-8 AD5171BRJZ5-R2CT-ND - IC DGTL POT OTP 5K 12C SOT23-8 更多... |
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
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.
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
相关PDF资料 |
PDF描述 |
|---|---|
| UPB2E221MHD | CAP ALUM 220UF 250V 20% RADIAL |
| UPS2G470MRD6 | CAP ALUM 47UF 400V 20% RADIAL |
| DS2786BG+ | IC FUEL GAUGE OCV-BASED 10-TDFN |
| UPS2W330MRD6 | CAP ALUM 33UF 450V 20% RADIAL |
| GMM10DSXH | CONN EDGECARD 20POS DIP .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD5172 | 制造商:AD 制造商全称: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 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:3,000 系列:DPP 接片:32 电阻（欧姆）:10k 电路数:1 温度系数:标准值 300 ppm/°C 存储器类型:非易失 接口:3 线串行（芯片选择，递增，增/减） 电源电压:2.5 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 供应商设备封装:8-TDFN（2x3） 包装:带卷 (TR) |
| AD5172BRM100 | 功能描述:IC POT DUAL 100K 256POS 10-MSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:3,000 系列:DPP 接片:32 电阻（欧姆）:10k 电路数:1 温度系数:标准值 300 ppm/°C 存储器类型:非易失 接口:3 线串行（芯片选择，递增，增/减） 电源电压:2.5 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 供应商设备封装:8-TDFN（2x3） 包装:带卷 (TR) |
| AD5172BRM100-RL7 | 制造商:Analog Devices 功能描述:Digital Potentiometer 256POS 100KOhm Dual 10-Pin MSOP T/R 制造商:Analog Devices 功能描述:DGTL POTENTIOMETER 256POS 100KOHM DUAL 10MSOP - Tape and Reel |
| AD5172BRM10-RL7 | 功能描述:IC DGTL POT DUAL OTP 10-MSOP T/R RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:3,000 系列:DPP 接片:32 电阻（欧姆）:10k 电路数:1 温度系数:标准值 300 ppm/°C 存储器类型:非易失 接口:3 线串行（芯片选择，递增，增/减） 电源电压:2.5 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 供应商设备封装:8-TDFN（2x3） 包装:带卷 (TR) |
发布紧急采购，3分钟左右您将得到回复。