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參數(shù)資料
| 型號： | MAX5234-MAX5235 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Single-Supply 3V/5V, Voltage-Output, Dual, Precision 12-Bit DACs |
| 中文描述： | 單電源3V/5V，電壓輸出，雙路，精密12位DAC |
| 文件頁數(shù)： | 13/19頁 |
| 文件大?。?/td> | 565K |
| 代理商： | MAX5234-MAX5235 |
2.0475V output with a 1.25V reference. Table 4 lists the
unipolar output codes.
Bipolar Output
The MAX5234/MAX5235 can be configured for a bipo-
lar output, as shown in Figure 8. The output voltage is
given by the equation:
V
OUT
= V
REF
[((1.6348 x NB) / 4096) - 1]
where NB represents the numeric value of the DAC
’
s
binary input code. Table 5 shows digital codes and the
corresponding output voltage for Figure 8
’
s circuit.
Using an AC Reference
In applications where the reference has an AC signal
component, the MAX5234/MAX5235 have multiplying
capabilities within the reference input voltage range
specifications. Figure 9 shows a technique for applying
a sinusoidal input to REF_, where the AC signal is offset
before being applied to the reference input.
Digital Calibration and
Threshold Selection
Figure 10 shows the MAX5234/MAX5235 in a digital
calibration application. With a bright light value applied
to the photodiode (on), the DAC is digitally ramped until
it trips the comparator. The microprocessor (μP) stores
this
“
high
”
calibration value. Repeat the process with a
dim light (off) to obtain the dark current calibration. The
μP then programs the DAC to set an output voltage at
the midpoint of the two calibrated values. Applications
include tachometers, motion sensing, automatic read-
ers, and liquid clarity analysis.
M
Single-Supply 3V/5V, Voltage-Output, Dual,
Precision 12-Bit DACs
______________________________________________________________________________________
13
16-BIT SERIAL WORD
C2
0
0
C1
0
1
C0
1
0
D11..............D0
12-bit DAC data
12-bit DAC data
S0*
0
0
FUNCTION
Load input register A; DAC registers are unchanged.
Load input register A; all DAC registers are updated.
0
1
1
12-bit DAC data
0
Load all DAC registers from the shift register (start up both DACs
with new data, and load the input registers).
1
0
0
X X X X X X X X X X X X
0
Update both DAC registers from their respective input registers
(start up both DACs with data previously stored in the input
registers).
1
1
0
1
1
0
12-bit DAC data
12-bit DAC data
0
0
Load input register B; DAC registers are unchanged.
Load input register B; all DAC registers are updated.
1
1
1
P1A P1B X X X X X X X X X X
0
Power down both DACs respectively according to bits P1A and
P1B (see Table 3). Internal bias remains active.
0
0
0
0 0 1 X X X X X X X X X
0
Update DAC register A from input register A (start up DAC A with
data previously stored in input register A).
0
0
0
0 1 1 P1A P1B X X X X X X X
0
Full power-down. Power down the main bias generator and
power down both DACs respectively according to bits P1A and
P1B (see Table 3).
0
0
0
1 0 1 X X X X X X X X X
0
Update DAC register B from input register B (start up DAC B with
data previously stored in input register B).
0
0
0
0
0
0
1 1 0 P1A X X X X X X X X
1 1 1 P1B X X X X X X X X
0
0
Power down DAC A according to bit P1A (see Table 3).
Power down DAC B according to bit P1B (see Table 3).
Table 2. Serial Interface Programming Commands
P1(A/B)
0
1
SHUTDOWN MODE
Shut down with internal 1k
load to GND
Shut down with internal 200k
load to GND
Table 3. P1 Shutdown Modes
X = Don’t care.
*
= S0 must be zero for proper operation.
相關PDF資料 |
PDF描述 |
|---|---|
| MAX5234AEUB | Single-Supply 3V/5V, Voltage-Output, Dual, Precision 12-Bit DACs |
| MAX5235 | Single-Supply 3V/5V, Voltage-Output, Dual, Precision 12-Bit DACs |
| MAX5235AEUB | Single-Supply 3V/5V, Voltage-Output, Dual, Precision 12-Bit DACs |
| MAX5250 | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
| MAX5250ACAP | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5235AEUB | 功能描述:數(shù)模轉換器- DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量:1 DAC 輸出端數(shù)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 |
| MAX5235AEUB+ | 功能描述:數(shù)模轉換器- DAC 12-Bit 2Ch Precision DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量:1 DAC 輸出端數(shù)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 |
| MAX5235AEUB+T | 功能描述:數(shù)模轉換器- DAC 12-Bit 2Ch Precision DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量:1 DAC 輸出端數(shù)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 |
| MAX5235AEUB-T | 功能描述:數(shù)模轉換器- DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量:1 DAC 輸出端數(shù)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 |
| MAX5235BEUB | 功能描述:數(shù)模轉換器- DAC RoHS:否 制造商:Texas Instruments 轉換器數(shù)量:1 DAC 輸出端數(shù)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 |
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