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參數(shù)資料
| 型號： | MAX5527GUA+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 12/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC POT DGTL 1TIME PROGR 8-UMAX |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 接片： | 64 |
| 電阻（歐姆）： | 100k |
| 電路數(shù)： | 1 |
| 溫度系數(shù)： | 標準值 35 ppm/°C |
| 存儲器類型： | 非易失 |
| 接口： | 2 線串行（芯片選擇，增/減） |
| 電源電壓： | 2.7 V ~ 5.25 V |
| 工作溫度： | -40°C ~ 105°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 8-uMAX |
| 包裝： | 帶卷 (TR) |
MAX5527/MAX5528/MAX5529
One-Time Programmable, Linear-Taper Digital
Potentiometers
_______________________________________________________________________________________
9
Change the wiper’s power-up position using the PV
one-time programming sequence after power-up (see
Figure 5). After setting the wiper to the desired power-
up position, perform the following six-step sequence:
1)
Set U/D and CS high.
2)
Connect an external voltage source at PV in the
range of +11V to +11.55V.
3)
Pull CS low.
4a)
Pulse CS high for six cycles, consisting of CS
starting low and going high for at least tCH, and
then low for at least tCL, to change the wiper
power-up position. The wiper remains adjustable.
4b)
Pulse CS high for seven cycles, consisting of CS
starting low and going high for at least tCH and then
low for at least tCL, to change the wiper power-up
position and lock the wiper in that same position.
The seventh CS pulse is labeled the optional lock-
out bit in Figure 5.
5)
Connect PV to GND or release the voltage source,
leaving PV floating.
6)
Pull CS high.
Pulse CS high for six cycles to change the wiper power-
up position. The wiper position returns to this pro-
grammed position on power-up, but remains adjustable.
Pulse CS high for seven cycles to lock the MAX5527/
MAX5528/MAX5529 to a specific wiper position with no
further adjustments allowed. This effectively converts
the potentiometer to a fixed resistor-divider. The sev-
enth pulse locks the wiper position and disables the
up/down interface. Once locked, connect U/D and CS
high, low, or leave them floating without increasing the
supply current (see Table 1).
If six clock pulses are used, the interface is enabled
and the device can be put into program mode again.
However, the part uses one-time programmable (OTP)
memory and should be programmed only once. If the
part is programmed more than once, all applied values
are ORed together. Thus, if 010101 is programmed the
first time and 101010 is programmed the second time,
the result will be 111111.
The external PV power supply must source at least 5mA
and have a good transient response. Decouple the PV
power supply with a 22F capacitor to GND. Ensure that
no more than 250H of inductance and/or 40
of para-
sitic resistance exists between the capacitor and the
device (see Figure 6).
PV
CS
+11V
0V
tPC
6 PULSES RECORD WIPER POSITION
OPTIONAL 7TH
LOCKOUT BIT
tCH
tCL
tCP
tPH
U/
D
Figure 5. One-Time Program Mode, Serial-Interface Timing Diagram
11V
22
F
LPARASITIC
< 250
H
RPARASITIC
< 40
TRACE PARASITICS
PV
MAX5527
MAX5528
MAX5529
Figure 6. PV Power-Supply Decoupling
MODE
POWER-ON RESET
WIPER POSITION
ADJUSTABLE
WIPER
Factory Default
(Unprogrammed)
Tap 31
Yes
Programmed by
Six
CS Pulses
Programmed position
Yes
Programmed by
Seven
CS Pulses
Programmed position
No
Table 1. One-Time Programming Options
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| MAX5528GTA | 制造商:Maxim Integrated Products 功能描述:ONE-TIME PROGRAMMABLE LINEAR-TAPER - Rail/Tube |
| MAX5528GTA+ | 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 64POS 50KOHM SGL 8TDFN EP - Rail/Tube |
| MAX5528GTA+T | 功能描述:數(shù)字電位計 IC 64-Tap One-Time Programmable 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MAX5528GTA-T | 功能描述:數(shù)字電位計 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MAX5528GUA | 功能描述:數(shù)字電位計 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
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