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參數(shù)資料
| 型號： | MAX5477EUD |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers |
| 中文描述： | 10K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDSO14 |
| 封裝： | 4.40 X 5 MM, MO-153AB-1, TSSOP-14 |
| 文件頁數(shù)： | 12/15頁 |
| 文件大?。?/td> | 383K |
| 代理商： | MAX5477EUD |
M
Dual, 256-Tap, Nonvolatile, I
2
C-Interface,
Digital Potentiometers
12
______________________________________________________________________________________
ADDRESS BYTE
3
4
COMMAND BYTE
10 11 12 13 14 15 16 17
DATA BYTE
1
2
5
6
7
8
9
18
19 20 21 22 23 24 25 26
27
SCL CYCLE
NUMBER
START
(S)
A6 A5 A4 A3 A2 A1 A0
ACK
(A)
TX NV V R3 R2 R1 R0(A)
D7 D6 D5 D4 D3 D2 D1 D0(A)
STOP
(P)
NOTES
VREG
NVREG
NVREGxVREG
VREGxNVREG
VREG
NVREG
NVREGxVREG
VREGxNVREG
VREG
NVREG
NVREGxVREG
VREGxNVREG
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1 A2 A1 A0 0
1 A2 A1 A0 0
1 A2 A1 A0 0
1 A2 A1 A0 0
1 A2 A1 A0 0
1 A2 A1 A0 0
1 A2 A1 A0 0
1 A2 A1 A0 0
1 A2 A1 A0 0
1 A2 A1 A0 0
1 A2 A1 A0 0
1 A2 A1 A0 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
1
1
0
0
1
1
0
0
1
1
0
1
0
0
1
1
0
0
1
1
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
WIPER A
ONLY
WIPER B
ONLY
WIPERS
A AND B
Table 2. Command Byte Summary
Standby
The MAX5477/MAX5478/MAX5479 feature a low-power
standby mode. When the device is not being pro-
grammed, it enters into standby mode and supply cur-
rent drops to 500nA (typ).
Applications Information
The MAX5477/MAX5478/MAX5479 are ideal for circuits
requiring digitally controlled adjustable resistance,
such as LCD contrast control (where voltage biasing
adjusts the display contrast), or for programmable fil-
ters with adjustable gain and/or cutoff frequency.
Positive LCD Bias Control
Figures 9 and 10 show an application where the
MAX5477/MAX5478/MAX5479 provide an adjustable,
positive LCD bias voltage. The op amp provides buffer-
ing and gain to the resistor-divider network made by
the potentiometer (Figure 9) or by a fixed resistor and a
variable resistor (see Figure 10).
Programmable Filter
Figure 11 shows the MAX5477/MAX5478/MAX5479 in a
1st-order programmable application filter. Adjust the
gain of the filter with R
2
, and set the cutoff frequency
with R
3
. Use the following equations to calculate the
gain (A) and the -3dB cutoff frequency (f
C
):
A
R
R
f
R
C
C
1
×
×
=
+
=
1
2
1
2
3
π
V
OUT
30V
5V
W_
H_
L_
MAX5477
MAX5478
MAX5479
MAX480
V
OUT
30V
5V
W_
H_
L_
MAX5477
MAX5478
MAX5479
MAX480
Figure 9. Positive LCD Bias Control Using a Voltage-Divider
Figure 10. Positive LCD Bias Control Using a Variable Resistor
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PDF描述 |
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| MAX5479ETE | Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers |
| MAX5478 | Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers |
| MAX5478ETE | Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers |
| MAX5478EUD | Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers |
| MAX5479 | Dual, 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5477EUD+ | 功能描述:數(shù)字電位計(jì) IC Dual 256-Tap NV I2C-Interface 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 |
| MAX5477EUD+T | 功能描述:數(shù)字電位計(jì) IC Dual 256-Tap NV I2C-Interface 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 |
| MAX5477EUD-T | 制造商:Maxim Integrated Products 功能描述:DUAL, 256-TAP, NONVOLATILE, I2C-INTERFACE, DI - Tape and Reel |
| MAX5478ETD | 制造商:Maxim Integrated Products 功能描述:DUAL, 256-TAP, NONVOLATILE, I2C-INTERFACE, DI - Rail/Tube |
| MAX5478ETE | 功能描述:數(shù)字電位計(jì) IC 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 |
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