參數(shù)資料
型號： MAX5151BCEE+T
廠商： Maxim Integrated Products
文件頁數(shù)： 6/16頁
文件大?。?/td> 0K
描述： IC DAC 13BIT DUAL LP SER 16-QSOP
標準包裝： 2,500
設(shè)置時間： 16µs
位數(shù)： 13
數(shù)據(jù)接口： 串行
轉(zhuǎn)換器數(shù)目： 2
電壓電源： 單電源
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 16-SSOP（0.154"，3.90mm 寬）
供應商設(shè)備封裝： 16-QSOP
包裝： 帶卷 (TR)
輸出數(shù)目和類型： 2 電壓，單極；2 電壓，雙極
采樣率（每秒）： *
MAX5150/MAX5151
Bipolar Output
The MAX5150/MAX5151 can be configured for a bipo-
lar output, as shown in Figure 11. The output voltage is
given by the equation (OS_ = AGND):
VOUT = VREF [((2 x NB) / 8192) - 1]
where NB represents the numeric value of the DAC’s
binary input code. Table 3 shows digital codes and the
corresponding output voltage for Figure 11’s circuit.
Using an AC Reference
In applications where the reference has an AC signal
component, the MAX5150/MAX5151 have multiplying
capabilities within the reference input voltage range
specifications. Figure 12 shows a technique for apply-
ing a sinusoidal input to REF_, where the AC signal is
offset before being applied to REF.
Harmonic Distortion and Noise
The total harmonic distortion plus noise (THD+N) is typ-
ically less than -78dB at full scale with a 1Vp-p input
swing at 5kHz. The typical -3dB frequency is 300kHz
for both devices, as shown in the
Typical Operating
Characteristics.
Digital Calibration and
Threshold Selection
Figure 13 shows the MAX5150/MAX5151 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 stores this
“high” calibration value. Repeat the process with a
dim light (off) to obtain the dark current calibration.
Low-Power, Dual, 13-Bit Voltage-Output DACs
with Serial Interface
14
______________________________________________________________________________________
Table 3. Bipolar Code Table
ANALOG OUTPUT
11111
1111
10000
0000
0001
DAC CONTENTS
MSB
LSB
10000
0000
0V
01111
1111
00000
0000
00000
0000
0001
+V
4095
4096
REF
+V
1
4096
REF
-V
1
4096
REF
-V
4095
4096
REF
-V
4096
- V
REF
=
AGND
DGND
R
TOLERANCES: 10k
± 0.1%
MAX5150
MAX5151
DAC _
REF_
OS_
OUT_
10k
V-
V+
VDD
VOUT
+5V/+3V
Figure 11. Bipolar Output Circuit
DAC_
OUT
MAX5150
MAX5151
10k
26k
OS_
REF
R
VDD
GND
AGND
+5V/
+3V
AC
REFERENCE
INPUT
500mVp-p
MAX495
+5V/+3V
Figure 12. AC Reference Input Circuit
AGND
DIN
P
DGND
MAX5150
MAX5151
DAC _
REF_
OS_
OUT_
R
V-
V+
PHOTODIODE
V+
VDD
VOUT
RPULLDOWN
+5V/+3V
Figure 13. Digital Calibration
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