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參數資料
| 型號： | MAX539BESA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | DAC |
| 英文描述： | +5V, Low-Power, Voltage-Output, Serial 12-Bit DACs |
| 中文描述： | SERIAL INPUT LOADING, 25 us SETTLING TIME, 12-BIT DAC, PDSO8 |
| 封裝： | 0.150 INCH, SOIC-8 |
| 文件頁數： | 8/16頁 |
| 文件大?。?/td> | 207K |
| 代理商： | MAX539BESA |
M
+5V, Low-Power, Voltage-Output
S erial 12-Bit DACs
8
_______________________________________________________________________________________
10
FUNCTION
1
BIPOFF
Bipolar Offset/Gain
Resistor
2
DIN
Serial Data Input
3
CLR
Clear. Asynchronously sets
DAC register to 000 hex.
PIN
—
1
4
SCLK
Serial Clock Input
5
CS
Chip Select, active low
6
DOUT
Serial Data Output for
daisy-chaining
7
DGND
Digital Ground
—
2
3
8
AGND
Analog Ground
9
REFIN
Reference Input
4
—
5
6
—
REFOUT
Reference Output,
2.048V
11
—
V
SS
Negative Power Supply
12
7
VOUT
DAC Output
13
8
V
DD
Positive Power Supply
14
—
RFB
Feedback Resistor
MAX531
MAX538
MAX539
NAME
____________________Pin Desc ription
_______________Detailed Desc ription
General DAC Disc ussion
The MAX531/MAX538/MAX539 use an “inverted” R-2R
ladder network with a single-supply CMOS op amp to con-
vert 12-bit digital data to analog voltage levels (see
Functional Diagram) The term “inverted” describes the
ladder network because the REFIN pin in current-output
DACs is the summing junction, or virtual ground, of an op
amp. However, such use would result in the output voltage
being the inverse of the reference voltage. The
MAX531/MAX538/MAX539’s topology makes the output
the same polarity as the reference input.
An internal reset circuit forces the DAC register to reset to
000 hex on power-up. Additionally, a clear
CLR
pin, when
held low, sets the DAC register to 000 hex.
CLR
operates
asynchronously and independently from the chip-select
(
CS)
pin.
Buffer Amplifier
The output buffer is a unity-gain stable, rail-to-rail output,
BiCMOS op amp. Input offset voltage and CMRR are
trimmed to achieve better than 12-bit performance.
Settling time is 25μs to 0.01% of final value. The settling
time is considerably longer when the DAC code is initially
set to 000 hex, because at this code the op amp is com-
pletely debiased. Start from code 001 hex if necessary.
The output is short-circuit protected and can drive a 2k
load with more than 100pF load capacitance.
t
CSH0
t
CSS
t
CH
t
CL
t
CSH1
t
CSW
t
DS
t
DH
t
DO
CS
SCLK
DIN
DOUT
t
CS1
Figure 1. Timing Diagram
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX539BESA+ | 功能描述:數模轉換器- DAC 12-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 |
| MAX539BESA+T | 功能描述:數模轉換器- DAC 12-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 |
| MAX539BESA-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 |
| MAX5400EKA | 制造商:Maxim Integrated Products 功能描述:256-TAP SOTPOT, 50K OHM, LOW-DRIFT - Bulk |
| MAX5400EKA+ | 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 256POS 50KOHM SGL 8PIN SOT-23 - Bulk |
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