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參數(shù)資料
| 型號： | MAX5182BEEI |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | DAC |
| 英文描述： | Dual, 10-Bit, 40MHz Current/Voltage Alternate-Phase Output DACs |
| 中文描述： | PARALLEL, WORD INPUT LOADING, 0.025 us SETTLING TIME, 10-BIT DAC, PDSO28 |
| 封裝： | 0.150 INCH, 0.025 INCH PITCH, QSOP-28 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 244K |
| 代理商： | MAX5182BEEI |
M
Dual, 10-Bit, 40MHz Current/Voltage
Alternate-Phase Output DACs
8
_______________________________________________________________________________________
Detailed Description
The MAX5182/MAX5185 are dual 10-bit digital-to-analog
converters (DACs) capable of operating with clock
speeds up to 40MHz. Each of these dual converters
consists of separate input and DAC registers, followed
by a current-source array capable of generating up to
1.5mA full-scale output current (Figure 1). An integrated
+1.2V voltage reference and control amplifier determine
the data converters’ full-scale output currents/voltages.
Careful reference design ensures close gain matching
and excellent drift characteristics. The MAX5185, with
its voltage output operation, features matched 400
on-
chip resistors that convert the current from the current
array into a voltage.
Internal Reference and Control Amplifier
The MAX5182/MAX5185 provide an integrated
50ppm/°C, +1.2V, low-noise bandgap reference, which
can be disabled and overridden by an external refer-
ence voltage. REFO serves either as an input for an
external reference or as an output for the integrated ref-
erence. If
REN
is connected to DGND, the internal ref-
erence is selected and REFO provides a +1.2V output.
Due to its limited 10μA output drive capability, the
REFO pin must be buffered with an external amplifier if
heavier loading is required.
The MAX5182/MAX5185 also employ a control amplifier
designed to simultaneously regulate the full-scale out-
put current IFS for both outputs of the ICs. The output
current is calculated as follows:
I
FS
= 8
·
I
REF
where I
REF
is the reference output current (I
REF
=
V
REFO
/R
SET
), and I
FS
is the full-scale output current.
R
SET
is the reference resistor that determines the
amplifier’s output current (Figure 2) on the MAX5182.
This current is mirrored into the current-source array,
where it is equally distributed between matched current
segments, and summed to valid output current read-
ings for the DACs.
Inside the MAX5185, each output current (DAC1 and
DAC2) is converted to an output voltage (V
OUT1
,
V
OUT2
) with two internal, ground-referenced 400
load
resistors. Using the internal +1.2V reference voltage, the
MAX5185’s integrated reference output current resistor
(R
SET
= 9.6k
), sets I
REF
to 125μA and I
FS
to 1mA.
9.6k*
REFR
REFO
1.2V REF
REN
CURRENT-
SOURCE ARRAY
DAC 1 SWITCHES
DAC 2 SWITCHES
4
MSB DECODE
CLK
OUTPUT
LATCHES
OUTPUT
LATCHES
MSB DECODE
*INTERNAL 400
AND 9.6k
RESISTORS FOR MAX5185 ONLY.
AV
DD
AGND
CS
DACEN
PD
*
4
*
*
4
*
4
DV
DD
DGND
CREF2
MAX5182
MAX5185
CREF1
OUT2P
OUT2N
OUT1P
OUT1N
D9
–
D0
INPUT
LATCHES
INPUT
LATCHES
Figure 1. Functional Diagram
相關PDF資料 |
PDF描述 |
|---|---|
| MAX5185BEEI | Dual, 10-Bit, 40MHz Current/Voltage Alternate-Phase Output DACs |
| MAX5188BEEI | Dual, 8-Bit, 40MHz, Current/Voltage, Alternate-Phase Output DACs |
| MAX5191BEEI | Dual, 8-Bit, 40MHz, Current/Voltage, Alternate-Phase Output DACs |
| MAX5188 | Dual, 8-Bit, 40MHz, Current/Voltage, Alternate-Phase Output DACs |
| MAX5189BEEI | Dual, 8-Bit, 40MHz, Current/Voltage, Simultaneous-Output DACs |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5182BEEI+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 10-Bit 2Ch High Speed 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 |
| MAX5182BEEI+T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 10-Bit 2Ch High Speed 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 |
| MAX5182BEEI-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 |
| MAX5183 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Low-Power.90Msps.6-Bit ADC[MAX1011/MAX1011CEG/MAX1011CEG-T ] |
| MAX5183BEEI | 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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