參數(shù)資料
型號(hào)： MAX5115-MAX5116
廠(chǎng)商： Maxim Integrated Products, Inc.
英文描述： Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface
中文描述： 非易失，四路，8位DAC，2線(xiàn)串行接口
文件頁(yè)數(shù)： 11/19頁(yè)
文件大?。?/td> 459K
代理商： MAX5115-MAX5116
M
Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial
Interface
______________________________________________________________________________________
11
Detailed Description
The MAX5115/MAX5116 8-bit DACs feature internal,
nonvolatile registers that store the DAC states for initial-
ization during power-up. These devices consist of resis-
tor-string DACs, rail-to-rail output buffers, a shift
register, power-on reset (POR) circuitry, and volatile
and nonvolatile memory registers (Figures 1 and 2).
The shift register decodes the control and address bits,
routing the data to the proper registers. Writing data to
a selected volatile register immediately updates the
DAC outputs.
The volatile registers retain data as long as the device
is powered. Removing power clears the volatile regis-
ters. The nonvolatile registers retain data even after
power is removed. On startup, when power is first
applied, data from the nonvolatile registers is trans-
ferred to the volatile registers to automatically initialize
the device. Read data from the nonvolatile or volatile
registers using the 2-wire serial interface.
DAC Operation
The MAX5115/MAX5116 use a DAC matrix decoding
architecture that saves power. A resistor string divides
the difference between the external reference voltages,
V
REFH_
and V
REFL_
. Row and column decoders select
the appropriate tap from the resistor string, providing
the equivalent analog voltage. The resistor string pre-
sents a code-independent input impedance to the ref-
erence and guarantees a monotonic output. Figure 3
shows a simplified diagram of one DAC.
Output Buffer Amplifiers
The MAX5115/MAX5116 analog outputs are internally
buffered by a precision unity-gain amplifier. The outputs
swing from GND to V
DD
with a V
REFL_
-to-V
REFH_
output
transition. The amplifier outputs typically settle to ±0.5 LSB
in 8μs when loaded with 5k
in parallel with 100pF.
DAC Registers
The MAX5115/MAX5116 feature two registers per DAC,
a volatile and a nonvolatile register, that store the DAC
data. The volatile DAC register holds the current value
of each DAC. Write data to the volatile registers directly
from the 2-wire serial interface or by loading the previ-
ously stored data from the respective nonvolatile regis-
ter. Clear the volatile registers by removing power to
the device. The volatile registers are read/write.
The nonvolatile register retains the DAC values even
after power is removed. Read stored data using the 2-
wire serial interface. On power-up, the devices auto-
matically initialize with data stored in the nonvolatile
registers. The nonvolatile registers are read/write and
programmed to all zeros at the factory.
REFH_
REFL_
R1
R15
R16
R255
R0
D7
D6
D5
D4
DAC
M
D3
D0
D2
D1
LSB DECODER
Figure 3. DAC Simplified Circuit Diagram
相關(guān)PDF資料
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MAX5116 Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX5116 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:Nonvolatile, Quad, 8-Bit DACs with 2-Wire Serial Interface
MAX5116EEE 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(lèi)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
MAX5116EEE+ 功能描述:數(shù)模轉(zhuǎn)換器- DAC 8-Bit 4Ch 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(lèi)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
MAX5116EEE+T 功能描述:數(shù)模轉(zhuǎn)換器- DAC 8-Bit 4Ch 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(lèi)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
MAX5116EEE-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(lèi)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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