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參數(shù)資料
| 型號(hào)： | MAX5253BMJP |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | DAC |
| 英文描述： | 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 |
| 中文描述： | SERIAL INPUT LOADING, 16 us SETTLING TIME, 12-BIT DAC, CDIP20 |
| 封裝： | CERDIP-20 |
| 文件頁(yè)數(shù)： | 14/16頁(yè) |
| 文件大?。?/td> | 135K |
| 代理商： | MAX5253BMJP |
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M
Using an AC Referenc e
In applications where the reference has AC signal com-
ponents, the MAX5253 has multiplying capability within
the reference input range specifications. Figure 12
shows a technique for applying a sine-wave signal to
the reference input where the AC signal is offset before
being applied to REFAB/REFCD. The reference voltage
must never be more negative than DGND.
The MAX5253’s total harmonic distortion plus noise
(THD + N) is typically less than -72dB, given a 1Vp-p
signal swing and input frequencies up to 25kHz. The
typical -3dB frequency is 650kHz, as shown in the
Typical Operating Characteristics graphs.
Digitally Programmable Current S ourc e
The circuit of Figure 13 places an NPN transistor
(2N3904 or similar) within the op-amp feedback loop to
implement a digitally programmable, unidirectional cur-
rent source. This circuit can be used to drive 4mA to
20mA current loops, which are commonly used in
industrial-control applications. The output current is cal-
culated with the following equation:
I
OUT
= (V
REF
/ R) x (NB / 4096)
where NB is the numeric value of the DAC’s binary
input code and R is the sense resistor shown in
Figure 13.
+3V, Quad, 12-Bit Voltage-Output DAC
with S erial Interfac e
14
______________________________________________________________________________________
MAX5253
DAC A
DAC B
DAC C
DAC D
V
REFAB
= V
REFCD
= 1.25V
OUTA
FBB
10k
10k
10k
10k
16k
16k
16k
16k
OUTB
FBC
OUTC
FBD
OUTD
DGND
AGND
REFAB
REFCD
REFERENCE INPUTS
+3.3V
V
DD
FBA
Figure 10. Unipolar Rail-to-Rail Output Circuit
DAC
V
OUT
+5V
-5V
R1 = R2 = 10k
± 0.1%
MAX5253
REF_
R1
R2
FB_
OUT_
Figure 11. Bipolar Output Circuit
DAC_
OUT_
MAX5253
AGND
10k
26k
REF_
V
DD
DGND
+3.3V
AC
REFERENCE
INPUT
500mVp-p
1/2 MAX492
Figure 12. AC Reference Input Circuit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX5253BCPP | +3V, Quad, 12-Bit Voltage-Output DAC with Serial Interface |
| MAX5253AEAP | RECTIFIER FAST-RECOVERY SINGLE 3A 100V 150A-ifsm 1.2V-vf 150ns 5uA-ir DO-201AD 1.2K/REEL-13 |
| MAX525 | Low-Power, Quad, 12-Bit Voltage-Output DAC with Serial Interface |
| MAX525ACAP | 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 |
| MAX525ACPP | 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 |
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