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參數資料
| 型號： | MAX5489ETE+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 12/13頁 |
| 文件大小： | 0K |
| 描述： | IC POT DGTL DUAL 256-TAP 16-TQFN |
| 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： | 16-WFQFN 裸露焊盤 |
| 供應商設備封裝： | 16-TQFN（3x3） |
| 包裝： | 帶卷 (TR) |
MAX5487/MAX5488/MAX5489
Dual, 256-Tap, Nonvolatile, SPI-Interface,
Linear-Taper Digital Potentiometers
8
_______________________________________________________________________________________
Detailed Description
The MAX5487/MAX5488/MAX5489 contain two resistor
arrays, with 255 resistive elements each. The MAX5487
has an end-to-end resistance of 10k
, while the
MAX5488 and MAX5489 have resistances of 50k
and
100k
, respectively. The MAX5487/MAX5488/MAX5489
allow access to the high, low, and wiper terminals on
both potentiometers for a standard voltage-divider con-
figuration. Connect the wiper to the high terminal, and
connect the low terminal to ground, to make the device
a variable resistor (see Figure 1).
A simple 3-wire serial interface programs either wiper
directly to any of the 256 tap points. The nonvolatile
memory stores the wiper position prior to power-down
and recalls the wiper to the same point upon power-up
or by using an interface command (see Table 1). The
nonvolatile memory is guaranteed for 200,000 wiper
store cycles and 50 years for wiper data retention.
SPI Digital Interface
The MAX5487/MAX5488/MAX5489 use a 3-wire SPI-
compatible serial data interface (Figures 2 and 3). This
write-only interface contains three inputs: chip-select
(
CS), data clock (SCLK), and data in (DIN). Drive CS low
to enable the serial interface and clock data synchro-
nously into the shift register on each SCLK rising edge.
The WRITE commands (C1, C0 = 00 or 01) require 16
clock cycles to clock in the command, address, and data
(Figure 3a). The COPY commands (C1, C0 = 10, 11) can
use either eight clock cycles to transfer only command
and address bits (Figure 3b) or 16 clock cycles, with the
device disregarding 8 data bits (Figure 3a).
After loading data into the shift register, drive
CS high
to latch the data into the appropriate potentiometer
control register and disable the serial interface. Keep
CS low during the entire serial data stream to avoid cor-
ruption of the data.
Digital-Interface Format
The data format consists of three elements: command
bits, address bits, and data bits (see Table 1 and
Figure 3). The command bits (C1 and C0) indicate the
action to be taken such as changing or storing the
wiper position. The address bits (A1 and A0) specify
which potentiometer the command affects and the 8
data bits (D7 to D0) specify the wiper position.
PIN
TQFN
TSSOP
NAME
FUNCTION
114
VDD
Power Supply. Bypass VDD to GND with a 0.1F capacitor as close to the device as possible.
2
13
SCLK
Serial-Interface Clock Input
3
12
DIN
Serial-Interface Data Input
411
CS
Active-Low Chip-Select Digital Input
5, 6, 9
7, 9, 10
N.C.
No Connection. Not internally connected.
7
8
GND
Ground
8, 16
—
I.C.
Internally connected to EP. Leave unconnected.
10
6
LB
Low Terminal of Resistor B. The voltage at L can be greater than or less than the voltage at H.
Current can flow into or out of L.
11
5
WB
Wiper Terminal of Resistor B
12
4
HB
High Terminal of Resistor B. The voltage at H can be greater than or less than the voltage at L.
Current can flow into or out of H.
13
3
LA
Low Terminal of Resistor A. The voltage at L can be greater than or less than the voltage at H.
Current can flow into or out of L.
14
2
WA
Wiper Terminal of Resistor A
15
1
HA
High Terminal of Resistor A. The voltage at H can be greater than or less than the voltage at L.
Current can flow into or out of H.
—
EP
Exposed Pad (TQFN only). Internally connected to pins 8 and 16. Leave unconnected.
Pin Description
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX5489EUD | 制造商:Maxim Integrated Products 功能描述:DUAL, 256-TAP, NONVOLATILE, SPI-INTERFACE, LI - Rail/Tube |
| MAX5489EUD+ | 功能描述:數字電位計 IC Dual 256-Tap NV SPI-Interface RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數:35 PPM / C 容差:25 % POT 數量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數字接口: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 |
| MAX5489EUD+T | 功能描述:數字電位計 IC Dual 256-Tap NV SPI-Interface RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數:35 PPM / C 容差:25 % POT 數量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數字接口: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 |
| MAX5489EUD-T | 制造商:Maxim Integrated Products 功能描述:DUAL, 256-TAP, NONVOLATILE, SPI-INTERFACE, LI - Tape and Reel |
| MAX548AC/D | 功能描述:數模轉換器- DAC RoHS:否 制造商:Texas Instruments 轉換器數量:1 DAC 輸出端數量:1 轉換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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