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參數(shù)資料
| 型號(hào)： | MAX5187BEEG |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | DAC |
| 英文描述： | 8-Bit, 40MHz, Current/Voltage-Output DACs |
| 中文描述： | PARALLEL, 8 BITS INPUT LOADING, 0.025 us SETTLING TIME, 8-BIT DAC, PDSO24 |
| 封裝： | 0.150 INCH, 0.025 INCH PITCH, QSOP-24 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 226K |
| 代理商： | MAX5187BEEG |
M
8-Bit, 40MHz, Current/Voltage-Output DACs
8
_______________________________________________________________________________________
Detailed Description
The MAX5187/MAX5190 are 8-bit DACs capable of
operating with clock speeds up to 40MHz. Each con-
verter consists of separate input and DAC registers, fol-
lowed by a current-source array capable of generating
up to 1.5mA full-scale output current (Figure 1). An inte-
grated +1.2V voltage reference and control amplifier
determine the data converters’ full-scale output cur-
rents/voltages. Careful reference design ensures close
gain matching and excellent drift characteristics. The
MAX5190’s voltage-output operation features matched
400
on-chip resistors that convert the current array
current into a voltage.
Internal Reference
and Control Amplifier
The MAX5187/MAX5190 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 external refer-
ence input or an integrated reference output. If
REN
is
connected to DGND, the internal reference is selected
and REFO provides a +1.2V output. Due to its limited
10μA output drive capability, REFO must be buffered
with an external amplifier if heavier loading is required.
The MAX5187/MAX5190 also employ a control amplifi-
er, designed to simultaneously regulate the full-scale
output current (I
FS
) for both outputs of the devices. 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 on the MAX5187 (Figure 2).
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.
The MAX5190 converts this output current into a differ-
ential output voltage (V
OUT
) with two internal, ground-
referenced 400
load resistors. Using the internal
+1.2V reference voltage, the MAX5190’s integrated
reference output current resistor (R
SET
= 9.6k
) sets
I
REF
to 125μA and I
FS
to 1mA.
REFR
REFO
1.2V REF
REN
CURRENT-
SOURCE ARRAY
DAC SWITCHES
400
400
*
MSB DECODE
CLK
OUTPUT
LATCHES
OUTPUT
LATCHES
MSB DECODE
*INTERNAL 400
AND 9.6k
RESISTORS FOR MAX5190 ONLY.
AV
DD
AGND
CS
DACEN
PD
*
DV
DD
DGND
D7
–
D0
MAX5187
MAX5190
CREF
OUTN
OUTP
INPUT
LATCHES
INPUT
LATCHES
9.6k*
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 |
|---|---|
| MAX5187BEEG+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 8-Bit 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 |
| MAX5187BEEG+T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 8-Bit 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 |
| MAX5187BEEG-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 |
| MAX5188 | 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 |
| 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 |
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