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參數資料
| 型號： | MAX536 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Calibrated, Quad, 12-Bit Voltage-Output DACs with Serial Interface |
| 中文描述： | 校準型、四路、12位、電壓輸出DAC，串行接口 |
| 文件頁數： | 13/24頁 |
| 文件大?。?/td> | 361K |
| 代理商： | MAX536 |
M
Calibrated, Quad, 12-Bit
Voltage-Output DACs with S erial Interfac e
The input impedance at each reference input is code
dependent, ranging from a low value of typically 6k
(with an input code of 0101 0101 0101) to a high value
of 60k
(with an input code of 0000 0000 0000). Since
the input impedance at the reference pins is code
dependent, load regulation of the reference source is
important.
The REFAB and REFCD reference inputs have a 5k
guaranteed minimum input impedance. When the two
reference inputs are driven from the same source, the
effective minimum impedance becomes 2.5k
. A volt-
age reference with a load regulation of 0.001%/mA,
such as the MAX674, would typically deviate by
0.164LSB (0.328LSB worst case) when simultaneously
driving both MAX536 reference inputs at 10V.
An op amp, such as the MAX400 or OP07, can be used
to buffer the reference to increase reference accuracy.
The op amp’s closed-loop output impedance should be
kept below 0.05
to ensure an error of less than
0.08LSB. Reference accuracy is also improved by driv-
ing the REFAB and REFCD pins separately, or by using
a reference with excellent accuracy and superior load
regulation, such as the MAX676/MAX677/MAX678.
The reference input capacitance is also code depen-
dent and typically ranges from 125pF to 300pF.
Output Buffer Amplifiers
All MAX536/MAX537 voltage outputs are internally
buffered by precision unity-gain followers with a typical
slew rate of 5V/
μ
s for the MAX536 and 3V/
μ
s for the
MAX537.
With a full-scale transition at the MAX536 output (0V to
10V or 10V to 0V), the typical settling time to ±1/2LSB is
3
μ
s when loaded with 5k
in parallel with 100pF (loads
less than 5k
degrade performance).
With a full-scale transition at the MAX537 output (0V to
2.5V or 2.5V to 0V), the typical settling time to ±1/2LSB
is 5
μ
s when loaded with 5k
in parallel with 100pF
(loads less than 5k
degrade performance).
Output dynamic responses and settling performances
of the MAX536/MAX537 output amplifier are shown in
the Typical Operating Characteristics.
Serial-Interface Configurations
The MAX536/MAX537’s 3-wire or 4-wire serial interface is
compatible with both Microwire (Figure 2) and SPI/QSPI
(Figure 3). In Figures 2 and 3,
LDAC
can be tied either
high or low for a 3-wire interface, or used as the fourth
input with a 4-wire interface. The connection between
SDO and the serial-interface port is not necessary, but
may be used for data echo. (Data held in the shift register
SCK
SDI
SDO*
CS
LDAC**
SK
SO
SI*
I/O
I/O
MAX536
MAX537
MICROWIRE
PORT
5V
1k
*THE SDO-SI CONNECTION IS NOT REQUIRED FOR WRITING TOTHE MAX536,
BUT MAY BE USED FOR READBACK PURPOSES.
**THE LDAC CONNECTION IS NOT REQUIRED WHEN USING THE 3-WIRE INTERFACE.
THE MAX537 HAS AN INTERNAL ACTIVE PULL-UP TOV
DD,
SOR
P
IS NOT NECESSARY.
R
P
Figure 2. Connections for Microwire
Figure 3. Connections for SPI/QSPI
SDO*
SDI
SCK
CS
LDAC**
MISO*
MOSI
SCK
I/O
I/O
SPI/QSPI
PORT
SS
5V
CPOL = 0,CPHA = 0
1k
*THE SDO-MISOCONNECTION IS NOT REQUIRED FOR WRITING TOTHE MAX536,
BUT MAY BE USED FOR READBACK PURPOSES.
**THE LDAC CONNECTION IS NOT REQUIRED WHEN USING THE 3-WIRE INTERFACE.
THE MAX537 HAS AN INTERNAL ACTIVE PULL-UP TOV
DD,
SOR
P
IS NOT NECESSARY.
MAX536
MAX537
R
P
_______________________________________________________________________________________
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX5360LEUK | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX5360LEUK+ | 制造商:Maxim Integrated Products 功能描述:DAC SGL CURRENT STEERING 6-BIT 5PIN SOT-23 - Rail/Tube |
| MAX5360LEUK+T | 功能描述:數模轉換器- DAC 6-Bit Precision 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 |
| MAX5360LEUK-T | 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 |
| MAX5360MEUK | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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