- 您現在的位置：買賣IC網 > PDF目錄362090 > AD524C (Analog Devices, Inc.) Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier PDF資料下載
參數資料
| 型號： | AD524C |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 運動控制電子 |
| 英文描述： | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
| 中文描述： | 單電源，軌至軌，低成本儀表放大器 |
| 文件頁數： | 9/16頁 |
| 文件大?。?/td> | 364K |
| 代理商： | AD524C |
REV. A
–9–
AD5241/AD5242
OPERATION
The AD5241/AD5242 provides a single-/dual-channel, 256-
position digitally controlled variable resistor (VR) device. The
terms VR, RDAC, and programmable resistor are commonly
used interchangeably to refer to digital potentiometer.
To program the VR settings, refer to the Digital Interface sec-
tion. Both parts have an internal power ON preset that places
the wiper in midscale during power-on, which simplifies the
fault condition recovery at power-up. In addition, the shutdown
SHDN
pin of AD5241/AD5242 places the RDAC in an almost
zero power consumption state where Terminal A is open cir-
cuited and the Wiper W is connected to Terminal B, resulting
in only leakage current being consumed in the VR structure.
During shutdown, the VR latch contents are maintained when
the RDAC is inactive. When the part is returned from shut-
down, the stored VR setting will be applied to the RDAC.
SW
SHDN
SW
N
2
–
1
R
R
SW
N
2
–
2
RDAC
LATCH &
DECODER
R
R
AB
/2
N
B
W
DIGITAL CIRCUITRY
OMITTED FOR CLARITY
A
SW
1
SW
0
R
R
D7
D6
D5
D4
D3
D2
D1
D0
SHDN
Figure 4. AD5241/AD5242 Equivalent RDAC Circuit
PROGRAMMING THE VARIABLE RESISTOR
Rheostat Operation
The nominal resistance of the RDAC between Terminals A and
B are available in 10 k
, 100 k
, and 1 M
. The final two or
three digits of the part number determine the nominal resistance
value, e.g. 10 k
= 10; 100 k
= 100; 1 M
= 1 M. The
nominal resistance (R
AB
) of the VR has 256 contact points
accessed by the wiper terminal, plus the B terminal contact.
The 8-bit data in the RDAC latch is decoded to select one of
the 256 possible settings. Assume a 10 k
part is used; the
wiper’s first connection starts at the B terminal for data 00
H
.
Since there is a 60
wiper contact resistance, such connection
yields a minimum of 60
resistance between terminals W and
B. The second connection is the first tap point corresponds to
99
(R
WB
= R
AB
/256 + R
W
= 39 + 60) for data 01
H
. The third
connection is the next tap point representing 138
(39
×
2 + 60)
for data 02
H
and so on. Each LSB data value increase moves the
wiper up the resistor ladder until the last tap point is reached at
10021
[R
AB
– 1 LSB + R
W
]. Figure 4 shows a simplified dia-
gram of the equivalent RDAC circuit where the last resistor
string will not be accessed; therefore, there is 1 LSB less of the
nominal resistance at full scale in addition to the wiper resistance.
The general equation determining the digitally programmed
resistance between W and B is:
R
D
( )
=
D
R
R
WB
AB
W
×
+
256
(1)
where:
D
is the decimal equivalent of the binary code between 0
and 255 which is loaded in the 8-bit RDAC register.
R
AB
is the nominal end-to-end resistance.
R
W
is the wiper resistance contributed by the on-resistance
of the internal switch.
Again, if
R
AB
= 10 k
and A terminal can be either open circuit
or tied to W, the following output resistance at
R
WB
will be set
for the following RDAC latch codes.
FREQUENCY
–
Hz
6
–
36
–
42
–
48
–
54
G
–
100k
10k
1k
100
–
30
–
24
–
18
–
12
–
6
0
FF
H
80
H
40
H
20
H
10
H
08
H
04
H
02
H
01
H
TPC 13. AD5242 100 k
Gain vs. Frequency vs. Code
FREQUENCY
–
Hz
6
–
36
–
42
–
48
–
54
G
–
100k
10k
1k
100
–
30
–
24
–
18
–
12
–
6
0
FF
H
80
H
40
H
20
H
10
H
08
H
04
H
02
H
01
H
TPC 14. AD5242 1 M
Gain vs. Frequency vs. Code
相關PDF資料 |
PDF描述 |
|---|---|
| AD524CD | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
| AD524S | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
| AD524SD | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
| AD524AR-16 | VARISTOR 150V RMS 14MM RADIAL |
| AD524AR-16-REEL | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD524CD | 功能描述:IC AMP INST 1MHZ PREC LN 16CDIP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 其它有關文件:TS1854A View All Specifications 標準包裝:50 系列:- 放大器類型:通用 電路數:4 輸出類型:滿擺幅 轉換速率:0.25 V/µs 增益帶寬積:630kHz -3db帶寬:- 電流 - 輸入偏壓:16nA 電壓 - 輸入偏移:1000µV 電流 - 電源:162µA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 6 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:14-SO 包裝:管件 |
| AD524CD/+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Instrumentation Amp， Pin-Programmable |
| AD524CDZ | 功能描述:IC AMP INST 1MHZ PREC LN 16CDIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:2,500 系列:- 放大器類型:通用 電路數:4 輸出類型:- 轉換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| AD524CE | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述: |
| AD524S | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision Instrumentation Amplifier |
發(fā)布緊急采購，3分鐘左右您將得到回復。