參數(shù)資料
型號(hào)： MAX5253BEAP+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 6/16頁(yè)
文件大?。?/td> 0K
描述： IC DAC 12BIT QUAD 3V 20-SSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,000
設(shè)置時(shí)間： 16µs
位數(shù)： 12
數(shù)據(jù)接口： 串行
轉(zhuǎn)換器數(shù)目： 4
電壓電源： 單電源
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 20-SSOP（0.209"，5.30mm 寬）
供應(yīng)商設(shè)備封裝： 20-SSOP
包裝： 帶卷 (TR)
輸出數(shù)目和類型： 4 電壓，單極；4 電壓，雙極
采樣率（每秒）： *
MAX5253
Using an AC Reference
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 1V sig-
nal swing and input frequencies up to 25kHz. The typi-
cal -3dB frequency is 650kHz, as shown in the Typical
Operating Characteristics graphs.
Digitally Programmable Current Source
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:
IOUT = (VREF / 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 Serial Interface
14
______________________________________________________________________________________
MAX5253
DAC A
DAC B
DAC C
DAC D
VREFAB = VREFCD = 1.25V
OUTA
10k
10k
10k
10k
16k
16k
16k
16k
OUTB
OUTC
OUTD
DGND
AGND
REFAB
REFCD
REFERENCE INPUTS
+3.3V
VDD
FBA
FBB
FBC
FBD
Figure 10. Unipolar Rail-to-Rail Output Circuit
DAC
VOUT
+5V
-5V
R1 = R2 = 10k
± 0.1%
MAX5253
REF_
R1
R2
FB_
OUT_
Figure 11. Bipolar Output Circuit
DAC_
OUT_
MAX5253
10k
26k
REF_
VDD
AGND
DGND
+3.3V
AC
REFERENCE
INPUT
500mVP-P
1/2 MAX492
Figure 12. AC Reference Input Circuit
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