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參數(shù)資料
| 型號(hào)： | MAX532BEPE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | DAC |
| 英文描述： | Single Universal Serial Bus Port Transient Suppressor 6-SOT-23 -40 to 85 |
| 中文描述： | DUAL, SERIAL INPUT LOADING, 2.5 us SETTLING TIME, 12-BIT DAC, PDIP16 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-16 |
| 文件頁(yè)數(shù)： | 9/16頁(yè) |
| 文件大?。?/td> | 162K |
| 代理商： | MAX532BEPE |
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M
Dual, S erial-Input,
Voltage-Output, 12-Bit MDAC
_______________________________________________________________________________________
9
Figure 4. Connections for Microwire
SCLK
DIN
DOUT
CS
LDAC
SK
SO
SI
I/O
I/O
MAX532
MIPORT
5V
1k
THE DOUT-SI CONNECTION IS NOT REQUIRED FOR WRITING TO THE
MAX532, BUT MAY BE USED FOR READ-BACK PURPOSES.
Figure 5. Connections for SPI
DOUT
DIN
SCLK
CS
LDAC
MISO
MOSI
SCK
I/O
I/O
MAX532
SPI
SS
5V
CPOL = 0,CPHA = 0
1k
THE DOUT-MISOCONNECTION IS NOT REQUIRED FOR WRITING TOTHE MAX532,
BUT MAY BE USED FOR READ-BACK PURPOSES.
_______________Detailed Desc ription
Digital Interfac e
The MAX532 is Microwire and SPI compatible (Figures
4 and 5). Both DACs are programmed by writing three
8-bit words (see Figures 2 and 3, and the Functional
Diagram. Serial data is clocked into the data registers
MSB first, with DACB information preceding DACA
information. Data is clocked in on the rising edge of
SCLK while
CS
is low. With
CS
high, data can not be
clocked into DIN, and DOUT is high impedance. SCLK
can be driven at rates up to 6.25MHz.
The MAX532 uses either a 3-wire or a 4-wire serial
interface. Three wires may be used (
CS
, DIN, SCLK)
by tying
LDAC
low. With
LDAC
low, the DACs are
updated simultaneously when
CS
goes high (see
Figure 2 and the Functional Diagram. The 3-wire inter-
face may be used if the MAX532 is used alone, or if two
or more MAX532s are cascaded (DOUT of one device
tied to DIN of the other) (Figure 6).
The 4-wire interface (
LDAC
,
CS
, DIN, SCLK) is required
if several serial devices are tied to the same data line,
and it is desirable to update them simultaneously
(Figure 7). With the 4-wire interface, the DACs are
updated when
LDAC
goes low (see Figure 3 and the
Functional Diagram.
A serial output, DOUT, allows cascading of two or more
MAX532s and allows read-back of the data written to
the device’s 24-bit shift register. The data at DOUT is
delayed 24 clock cycles from the data at DIN (see
Figures 2 and 3, and the Functional Diagram. DOUT
is an open-drain N-channel MOSFET that requires an
external pull-up resistor (typically 1k
if pulled up to
+5V, and 3k
if pulled up to +12V or +15V). Logic lev-
els are guaranteed with sink currents up to 5mA (see
Electrical Characteristics). Output data changes on the
falling edge of SCLK when
CS
is low. If
CS
is high,
DOUT is three-state (high-impedance).
Daisy-Chaining Devic es
Any number of MAX532s can be daisy-chained by con-
necting the DOUT pin of one device (with a pull-up
resistor) to the DIN pin of the following device in the
chain (Figure 6).
When daisy-chaining devices, t
CSS0
(
CS
low to SCLK
high), must be the greater of t
DV
+ t
DS
or t
DS
+ (t
RC
+ t
TR
- t
CS
), where t
CSW
is the
CS
pulse width used in the sys-
tem and the term (t
RC
+ t
TR
- t
CSW
) accounts for the time
spent charging the DOUT capacitance with the external
pull-up resistor. So, for t
RC
< 250ns, t
CSS0
is simply t
DV
+ t
DS
. Calculate t
RC
using the following equation:
t
RC
= R
P
x C x ln (V
PULL-UP
/(V
PULL-UP
- 2.4V))
where V
PULL-UP
is the voltage that the pull-up resistor
is connected to, R
P
is the value of the pull-up resistor,
and C is the capacitance at DOUT. Values of t
RC
are
given in Table 1.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX532BMJE | Single Universal Serial Bus Port Transient Suppressor 6-SOT-23 -40 to 85 |
| MAX532BEWE | Dual, Serial-Input, Voltage-Output, 12-Bit MDAC |
| MAX533ACEE | 2.7V, Low-Power, 8-Bit Quad DAC with Rail-to-Rail Output Buffers |
| MAX533ACPE | 2.7V, Low-Power, 8-Bit Quad DAC with Rail-to-Rail Output Buffers |
| MAX533AEEE | 2.7V, Low-Power, 8-Bit Quad DAC with Rail-to-Rail Output Buffers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX532BEPE+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 12-Bit 2Ch Precision DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX532BEWE | 功能描述:數(shù)模轉(zhuǎn)換器- DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX532BEWE+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 12-Bit 2Ch Precision DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX532BEWE+T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 12-Bit 2Ch Precision DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| MAX532BEWE-T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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