參數(shù)資料
型號(hào)： MAX5155BCEE+T
廠商： Maxim Integrated Products
文件頁數(shù)： 6/16頁
文件大?。?/td> 0K
描述： IC DAC 12BIT DUAL LP SER 16-QSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
設(shè)置時(shí)間： 15µs
位數(shù)： 12
數(shù)據(jù)接口： 串行
轉(zhuǎn)換器數(shù)目： 2
電壓電源： 單電源
功率耗散（最大）： 667mW
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(yīng)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）： *
MAX5154/MAX5155
Bipolar Output
The MAX5154/MAX5155 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) / 4096) - 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 MAX5154/MAX5155 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 the reference input.
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 MAX5154/MAX5155 in a digital
calibration application. With a bright light value applied
to the photodiode (on), the DAC is digitally ramped until
Low-Power, Dual, 12-Bit Voltage-Output DACs
with Serial Interface
14
______________________________________________________________________________________
Table 3. Bipolar Code Table
ANALOG OUTPUT
1111 1111 1 111 (0)
1000 0000 0 001 (0)
DAC CONTENTS
MSB
LSB
1000 0000 0 000 (0)
0V
0111 1111 1 111 (0)
0000 0000 0 000 (0)
0000 0000 0 001 (0)
+V
2047
2048
REF
+V
1
2048
REF
-V
1
2048
REF
-V
2047
2048
REF
-V
2048
- V
REF
=
AGND
DGND
R
MAX5154
MAX5155
DAC _
REF_
OS_
OUT_
10k
V-
V+
VDD
VOUT
+5V/+3V
Figure 11. Bipolar Output Circuit
DAC_
OUT_
MAX5154
MAX5155
10k
26k
OS_
REF
R
VDD
DGND
AGND
+5V/
+3V
AC
REFERENCE
INPUT
500mVp-p
MAX495
+5V/+3V
Figure 12. AC Reference Input Circuit
AGND
DIN
P
DGND
MAX5154
MAX5155
DAC _
REF_
OS_
OUT_
R
V-
V+
PHOTODIODE
V+
VDD
VOUT
RPULLDOWN
+5V/+3V
Figure 13. Digital Calibration
Note: ( ) are for the sub bit.
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