- 您现在的位置：买卖IC网 > PDF目录16587 > EVAL-AD5282EBZ (Analog Devices Inc)BOARD EVALUATION FOR AD5282 PDF资料下载
参数资料
| 型号： | EVAL-AD5282EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/28页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD5282 |
| 标准包装： | 1 |
| 主要目的： | 数字电位器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | AD5282 |
| 主要属性： | 2 通道，256 位置 |
| 次要属性： | I²C 接口 |
| 已供物品： | 板 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页当前第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
AD5280/AD5282
Rev. C | Page 23 of
28
PROGRAMMABLE LOW-PASS FILTER
At resonance, setting the following balances the bridge:
In analog-to-digital conversion applications, it is common to
include an antialiasing filter to band-limit the sampling signal.
Dual-channel digital potentiometers can be used to construct
a second-order Sallen key low-pass filter (see Figure 63). The
design equations are
2
O
V
ω
=
2
O
i
S
Q
S
V
ω
+
ω
+
(11)
R1R2C1C2
O
1
=
ω
(12)
R2C2
R1C1
Q
1
+
=
(13)
Users can first select some convenient values for the capacitors.
To achieve maximally flat bandwidth where Q = 0.707, let C1 be
twice the size of C2 and let R1 = R2. As a result, R1 and R2 can be
adjusted to the same settings to achieve the desirable bandwidth.
VI
U1
VO
R1
A
R
W
B
R2
A
R
W
B
C2
C
C1
C
+2.5V
V+
V–
–2.5V
AD8601
ADJUSTED TO
SAME SETTING
02
92
9-
0
6
3
Figure 63. Sallen Key Low-Pass Filter
PROGRAMMABLE OSCILLATOR
In a classic Wien-bridge oscillator (Figure 64), the Wien
network (R, R', C, C') provides positive feedback, while R1
and R2 provide negative feedback. At the resonant frequency, fO,
the overall phase shift is 0, and the positive feedback causes the
circuit to oscillate. With R = R', C = C', and R2 = R2A//(R2B +
Rdiode), the oscillation frequency is
RC
f
or
RC
o
O
π
ω
1
=
2
(14)
where R is equal to RWA such that
AB
R
D
R
256
=
(15)
2
=
R1
R2
(16)
In practice, R2/R1 should be set slightly larger than 2 to ensure
that oscillation can start. On the other hand, the alternate turn-
on of Diode D1 and Diode D2 ensures that R2/R1 are smaller
than 2 momentarily and, therefore, stabilizes the oscillation.
Once the frequency is set, the oscillation amplitude can be
tuned by R2B because
D
B
D
O
V
R2
I
V
+
=
3
2
(17)
VO, ID, and VD are interdependent variables. With proper
selection of R2B, an equilibrium is reached such that VO
converges. R2B can be in series with a discrete resistor to
increase the amplitude, but the total resistance cannot be
too large to prevent saturation of the output.
FREQUENCY
ADJUSTMENT
C
2.2nF
CI
2.2nF
RI
10k
R
10k
BA
A
W
V+
V–
B
W
D1
D2
VO
U1
VP
A
VN
–2.5V
+2.5V
R1
1k
R2B
10k
R2A
2.1k
R1 = R1I = R2B = AD5282
D1 = D2 = 1N4148
AMPLITUDE
ADJUSTMENT
02
92
9-
06
4
OP1177
Figure 64. Programmable Oscillator with Amplitude Control
相关PDF资料 |
PDF描述 |
|---|---|
| ECO-S2WB101BA | CAP ALUM 100UF 450V 20% SNAP |
| EVAL-AD5262EBZ | BOARD EVAL FOR AD5262 |
| MC13783JVK5 | IC PWR MGT AUD CIRCUIT 247MAPBGA |
| V300B36E150BG3 | CONVERTER MOD DC/DC 36V 150W |
| EVAL-AD5100EBZ | BOARD EVAL FOR AD5100 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EVAL-AD5290EBZ | 功能描述:BOARD EVAL FOR AD5290 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
| EVAL-AD5292EBZ | 功能描述:BOARD EVAL FOR AD5292 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
| EVAL-AD5360EBZ | 功能描述:BOARD EVAL FOR AD5360 RoHS:是 类别:编程器，开发系统 >> 评估板 - 数模转换器 (DAC) 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- DAC 的数量:4 位数:12 采样率（每秒）:- 数据接口:串行，SPI? 设置时间:3µs DAC 型:电流/电压 工作温度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581 |
| EVAL-AD5360EBZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:16-Channel, 16-/14-Bit, Serial Input, Voltage-Output DAC |
| EVAL-AD5361EBZ | 功能描述:BOARD EVAL FOR AD5361 RoHS:是 类别:编程器，开发系统 >> 评估板 - 数模转换器 (DAC) 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- DAC 的数量:4 位数:12 采样率（每秒）:- 数据接口:串行，SPI? 设置时间:3µs DAC 型:电流/电压 工作温度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581 |
发布紧急采购，3分钟左右您将得到回复。