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參數(shù)資料
| 型號(hào)： | MAX551BCUB |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | DAC |
| 英文描述： | +3V/+5V, 12-Bit, Serial, Multiplying DACs in 10-Pin レMAX Package |
| 中文描述： | SERIAL INPUT LOADING, 0.08 us SETTLING TIME, 12-BIT DAC, PDSO10 |
| 封裝： | UMAX-10 |
| 文件頁(yè)數(shù)： | 11/12頁(yè) |
| 文件大?。?/td> | 99K |
| 代理商： | MAX551BCUB |
Figure 5 shows the MAX551 connected as a voltage
output DAC. In this mode of operation, the OUT pin is
connected to the reference-voltage source, and the
GND pin is connected to the PCB ground plane. The
DAC output now appears at the REF pin, which has a
constant resistance equal to the reference input resis-
tance (11k
typ). This output should be buffered with
an op amp when a lower output impedance is required.
The RFB pin is not used in this mode. The reference
input (OUT) impedance is code dependent, and the
circuit’s response time depends on the reference
source’s behavior with changing load conditions.
An advantage of voltage mode operation is that a neg-
ative reference is not required for a positive output.
Note that the reference input (OUT) must always be
positive and is limited to no more than 2V when V
DD
is
5V. The unipolar and bipolar circuits in Figures 3 and 4
can be converted to voltage mode.
Current Mode
Figure 6 shows the MAX551/MAX552 in a current out-
put configuration in which the output amplifier is pow-
ered from a single supply, and AGND is biased to
1.23V. With 0V applied to the REF input, the output can
be programmed from 1.23V (zero code) to 2.46V (full
scale). With 2.45V applied to REF, the output can be
programmed from 1.23V (zero code) to 0.01V (full
scale).
The MAX4166 op amp that drives AGND maintains the
1.23V bias as AGND’s impedance changes with the
DAC’s digital code, from high impedance (zero code)
to 7k
minimum (full scale).
Using an AC Referenc e
In applications where reference voltage has AC signal
components, the MAX551/MAX552 have multiplying
capability within the reference input range of ±6V. If the
DAC and the output amplifier are operated with a single
supply voltage, then an AC reference input can be off-
set with the circuit shown in Figure 7 to prevent the
DAC output voltage from exceeding the output amplifi-
er’s negative output rail. The reference input’s typical
-3dB bandwidth is greater than 700kHz, as shown in
the Typical Operating Characteristics graphs.
Offsetting AGND
The MAX551/MAX552 provide separate AGND and
GND inputs in the μMAX package. With this package,
AGND can be biased above GND to provide an arbi-
trary nonzero output voltage for a “0” input code
(Figure 8).
Layout, Grounding, and Bypassing
Bypass V
DD
with a 0.1μF capacitor, located as close to
V
DD
and GND as possible. The ground pins (AGND
and GND) should be connected in a star configuration
to the highest quality ground available, which should be
located as close to the MAX551/MAX552 as possible.
Since OUT and the output amplifier’s noninverting input
are sensitive to offset voltage, nodes that are to be
M
+3V /+5V, 12-Bit, S erial, Multiplying DACs
in 10-Pin μMAX Pac kage
______________________________________________________________________________________
11
V
DD
REF
10k
AC
REFERENCE
INPUT
+5V
(+3V)
10k
OUT
GND
MAX551
MAX552
MAX4166
( ) ARE FOR MAX552
RFB
V
DD
V
OUT
REF
+5V (+3V)
OUT
OUT
106M
ADJ
DGND
C1
+1.43V TO+12.6V
AGND
MAX551
MAX552
MAX6160
( ) ARE FOR MAX552
MAX4167
MAX4167
Figure 7. Single-Supply AC Reference Input Circuit
Figure 6. Single-Supply, Current Mode Operation
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PDF描述 |
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| MAX5532 | Dual, Ultra-Low-Power, 12-Bit, Voltage-Output DACs |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX551BCUB+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 12-Bit 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 |
| MAX551BCUB+T | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 12-Bit 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 |
| MAX551BCUB-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 |
| MAX551BEPA | 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 |
| MAX551BEPA+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 12-Bit 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 |
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