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參數(shù)資料
| 型號： | CAT525 |
| 元件分類： | 數(shù)字電位計 |
| 英文描述： | Configured Digitally Programmable Potentiometer (DPP⑩): Programmable Voltage Applications |
| 中文描述： | 配置數(shù)字可編程電位（民進黨⑩）：可編程電壓應(yīng)用 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 82K |
| 代理商： | CAT525 |
CAT525
7
Doc. No. 25078-00 4/01 - A M-1
MSB LSB
1111 1111
255
(.98 REF
1000 0000
128
(.98 REF
0111 1111
255
(.98 REF
0000 0001
255
(.98 REF
0000 0000
0
(.98 REF
REF
REF
F
VREF
RI
OUT
DAC INPUT DAC OUTPUT ANALOG
OUTPUT
REF
REF
OUT
REF
REF
OUT
REF
REF
OUT
REF
REF
OUT
FS
VZERO
REF
REF
VDAC
CODE
(VFS
ZERO
ZERO
Figure 3. Temporary Change in Output
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
D0
D1
D2
D3
D4
D5
D6
D7
1
NEW DAC DATA
CURRENT DAC DATA
DO
DI
CS
PROG
DAC
OUTPUT
to
CURRENT
NON-VOLATILE
DANEW
VOLATILE
CURRENT
NON-VOLATILE
RDY/BSY
setting is reloaded into the DAC control register. Since
this value is the same as that which had been there
previously no change in the DAC
’
s output is noticed.
Had the value held in the control register been different
from that stored in EEPROM then
a change would
occur
at the read cycle
’
s conclusion.
TEMPORARILY CHANGE OUTPUT
The CAT525 allows temporary changes in DAC
’
s output
to be made without disturbing the settings retained in
EEPROM memory. This feature is particularly useful
when testing for a new output setting and allows for user
adjustment of preset or default values without losing the
original factory settings.
Figure 3 shows the control and data signals needed to
effect a temporary output change. DAC settings may be
changed as many times as required and can be made to
any of the four DACs in any order or sequence. The
temporary setting(s) remain in effect long as CS remains
high. When CS returns low all four DACs will return to the
output values stored in EEPROM memory.
When it is desired to save a new setting acquired using
this feature, the new value must be reloaded into the
DAC control register prior to programming. This is be-
cause the CAT525
’
s internal control circuitry discards
from the programming register the new data two clock
cycles after receiving it if no PROG signal is received.
Amplified DAC Output
APPLICATION CIRCUITS
+5V
Bipolar DAC Output
OPT 505
GND
VDD
REF
REF
CONTROL
& DATA
+
–
OP 07
OUT
RF
R +
-15V
+15V
R
R
I
F
RI
I
RF
VDAC
For RI
OUT
RF
I
DAC
Vi
VOUT
CAT525
GND
VDD
REF
REF
CONTROL
& DATA
+
–
OP 07
VOUT
-15V
+15V
+5V
R
R
I
F
OUT RI
–––
) V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT5251WI00 | 制造商:ON Semiconductor 功能描述:DPP, NV, QUAD 256 TAPS, SPI - Rail/Tube |
| CAT5251WI-00 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述: |
| CAT5251WI-00-T1 | 功能描述:數(shù)字電位計 IC DPP NV QUAD 256 TAP SPI RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| CAT5251WI50 | 功能描述:數(shù)字電位計 IC Ind Temp 50K Up/Dwn Quad 256-Tap SPI RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| CAT5251WI-50 | 制造商:ON Semiconductor 功能描述:IC DIGITAL POT 50KOHM 256 QUAD SOIC-24 |
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