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參數(shù)資料
| 型號(hào)： | MAX5188 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dual, 8-Bit, 40MHz, Current/Voltage, Alternate-Phase Output DACs |
| 中文描述： | 雙路、8位、40MHz、電流/電壓、輸出交替更新DAC |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 226K |
| 代理商： | MAX5188 |
M
Dual, 8-Bit, 40MHz, Current/Voltage,
Alternate-Phase Output DACs
8
_______________________________________________________________________________________
Detailed Description
The MAX5188/MAX5191 are dual 8-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 integrat-
ed +1.2V voltage reference and control amplifier deter-
mine the data converters’ full-scale output currents/
voltages. Careful reference design ensures close gain
matching and excellent drift characteristics. The
MAX5191’s 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 MAX5188/MAX5191 provide an integrated
50ppm/°C, +1.2V, low-noise bandgap reference that
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 MAX5188/MAX5191 also employ a control amplifi-
er, designed to simultaneously regulate the full-scale
output current I
FS
for both MAX5188/MAX5191 outputs.
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 MAX5188.
This current is mirrored into the current-source array,
where it is equally distributed between matched current
segments and summed to valid output current readings
for the DACs.
Inside the MAX5191, 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 integrated reference output current resistor of the
MAX5191 (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
INPUT
LATCHES
*INTERNAL 400
AND 9.6k
RESISTORS FOR MAX5191 ONLY.
INPUT
LATCHES
AV
DD
AGND
CS
DACEN
PD
DV
DD
DGND
D7
–
D0
CREF2
MAX5188
MAX5191
CREF1
OUT2P
OUT2N
OUT1P
OUT1N
4
*
4
*
4
*
Figure 1. Functional Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5188_01 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Dual, 8-Bit, 40MHz, Current/Voltage,Alternate-Phase Output DACs |
| MAX5188BEEI | 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 |
| MAX5188BEEI+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 8-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(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 |
| MAX5188BEEI+T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 8-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(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 |
| MAX5188BEEI-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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