参数资料
型号: ADN2850BCPZ250-RL7
厂商: Analog Devices Inc
文件页数: 17/28页
文件大小: 0K
描述: IC DGTL RHEO DL 25K 9BIT16LFCSP
产品变化通告: Metal Edit Change 03/Feb/2012
标准包装: 1,500
接片: 1024
电阻(欧姆): 250k
电路数: 2
温度系数: 标准值 35 ppm/°C
存储器类型: 非易失
接口: 4 线 SPI(芯片选择)
电源电压: 3 V ~ 5.5 V,±2.25 V ~ 2.75 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-VQFN 裸露焊盘,CSP
供应商设备封装: 16-LFCSP
包装: 带卷 (TR)
ADN2850
Data Sheet
Rev. E | Page 24 of 28
RESISTANCE TOLERANCE, DRIFT, AND
TEMPERATURE COEFFICIENT MISMATCH
CONSIDERATIONS
In operation, such as gain control, the tolerance mismatch
between the digital resistor and the discrete resistor can cause
repeatability issues among various systems (see Figure 42).
Because of the inherent matching of the silicon process, it is
practical to apply the dual-channel device in this type of
application. As such, R1 can be replaced by one of the channels
of the digital resistor and programmed to a specific value. R2 can
be used for the adjustable gain. Although it adds cost, this approach
minimizes the tolerance and temperature coefficient mismatch
between R1 and R2. This approach also tracks the resistance
drift over time. As a result, these less than ideal parameters
become less sensitive to system variations.
AD8601
+
Vi
U1
VO
C1
B
W
R2
R1*
* REPLACED WITH ANOTHER
CHANNEL OF RDAC
0
2
6
0
-0
6
1
Figure 42. Linear Gain Control with Tracking Resistance Tolerance,
Drift, and Temperature Coefficient
RDAC CIRCUIT SIMULATION MODEL
The internal parasitic capacitances and the external capacitive
loads dominate the ac characteristics of the RDACs. A parasitic
simulation model is shown in Figure 43.
RDAC
25k
W
80pF
CB
11pF
B
02660-
063
Figure 43. RDAC Circuit Simulation Model (RDAC = 25 k)
The following code provides a macro model net list for the
25 k RDAC:
.PARAM D = 1024, RDAC = 25E3
*
.SUBCKT DPOT ( W, B)
*
CW
W
0
80E-12
RWB W
B
{D/1024 * RDAC + 50}
CB
B
0
11E-12
*
.ENDS DPOT
相关PDF资料
PDF描述
D38999/20FH55PN CONN RCPT 55POS WALL MNT W/PINS
VI-27L-MW CONVERTER MOD DC/DC 28V 100W
DS1100LU-20+T IC DELAY LINE 5TAP 20NS 8-USOP
VI-27K-MX-B1 CONVERTER MOD DC/DC 40V 75W
DS1135Z-6+T&R IC DELAY LINE 6NS 8-SOIC
相关代理商/技术参数
参数描述
ADN2850BCPZ25-RL7 功能描述:IC DGTL RHEO DL 25K 9BIT16LFCSP RoHS:是 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)
ADN2850BRU25 制造商:Analog Devices 功能描述:
adn2850bru25-rl7 制造商:Analog Devices 功能描述:
ADN2850BRUZ25 制造商:Analog Devices 功能描述:DUAL 9-BIT SPI DIG. POT - Rail/Tube 制造商:Analog Devices 功能描述:Dual 10-B Progable Non-Volatile Resistor
ADN2850BRUZ25-RL7 制造商:Analog Devices 功能描述: