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參數資料
| 型號： | MAX5489EUD+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 3/13頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC POT DGTL DUAL 256-TAP 14TSSOP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 接片： | 256 |
| 電阻（歐姆）： | 100k |
| 電路數： | 2 |
| 溫度系數： | 標準值 35 ppm/°C |
| 存儲器類型： | 非易失 |
| 接口： | 3 線串行（芯片選擇） |
| 電源電壓： | 2.7 V ~ 5.25 V |
| 工作溫度： | -40°C ~ 85°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) |
MAX5487/MAX5488/MAX5489
Dual, 256-Tap, Nonvolatile, SPI-Interface,
Linear-Taper Digital Potentiometers
______________________________________________________________________________________
11
Use the following equations to calculate the gain (A)
and the -3dB cutoff frequency (fC):
Adjustable Voltage Reference
Figure 7 shows the MAX5487/MAX5488/MAX5489 used
as the feedback resistors in multiple adjustable volt-
age-reference applications. Independently adjust the
output voltages of the MAX6160s from 1.23V to VIN -
0.2V by changing the wiper positions of the MAX5487/
MAX5488/MAX5489.
Offset Voltage and Gain Adjustment
Connect the high and low terminals of one potentiome-
ter of a MAX5487/MAX5488/MAX5489 to the NULL
inputs of a MAX410, and connect the wiper to the op
amp’s positive supply to nullify the offset voltage over
the operating temperature range. Install the other
potentiometer in the feedback path to adjust the gain of
the MAX410 (see Figure 8).
Chip Information
PROCESS: BiCMOS
f
RC
C =
××
1
2
3
π
A
R
=+
1
2
Figure 4. Positive LCD-Bias Control Using a Voltage-Divider
VOUT
30V
5V
W_
H_
L_
MAX5487
MAX5488
MAX5489
MAX480
Figure 5. Positive LCD-Bias Control Using a Variable Resistor
VOUT
30V
5V
W_
H_
L_
MAX5487
MAX5488
MAX5489
MAX480
14
13
12
11
10
9
8
1
2
3
4
5
6
7
VDD
SCLK
DIN
CS
HB
LA
WA
HA
TOP VIEW
MAX5487
MAX5488
MAX5489
N.C.
GND
N.C.
LB
WB
TSSOP
+
Figure 6. Programmable Filter
1/2 MAX5487
1/2 MAX5488
1/2 MAX5489
1/2 MAX5487
1/2 MAX5488
1/2 MAX5489
VIN
R2
HB
WB
LB
R1
VOUT
R3
HA
WA
LA
C
MAX410
V+
V-
R2, R3 = RHL x D / 256
WHERE RHL = END-TO-END RESISTANCE
AND D = DECIMAL VALUE OF WIPER CODE
Pin Configurations (continued)
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