參數(shù)資料
型號(hào)： MAX1162AC_B
廠商： Maxim Integrated Products, Inc.
英文描述： Low-Voltage Adjustable Precision Shunt Regulator 3-SOT-23 -40 to 125
中文描述： 16位，5V的，速度高達(dá)200ksps的10レ關(guān)機(jī)模數(shù)轉(zhuǎn)換器
文件頁(yè)數(shù)： 10/17頁(yè)
文件大?。?/td> 387K
代理商： MAX1162AC_B
M
The data output from the MAX1162 is binary and Figure
8 depicts the nominal transfer function. Code transitions
occur halfway between successive-integer LSB values
(V
REF
= 4.096V and 1LSB = 63μV or 4.096V/65536).
Applications Information
External Reference
The MAX1162 requires an external reference with a
+3.8V and AV
DD
voltage range. Connect the external
reference directly to REF. Bypass REF to AGND (pin 3)
with a 4.7μF capacitor. When not using a low-ESR
bypass capacitor, use a 0.1μF ceramic capacitor in
parallel with the 4.7μF capacitor. Noise on the refer-
ence degrades conversion accuracy.
The input impedance at REF is 40k
for DC currents.
During a conversion the external reference at REF must
deliver 100μA of DC load current and have an output
impedance of 10
or less.
For optimal performance, buffer the reference through
an op amp and bypass the REF input. Consider the
MAX1162
’
s equivalent input noise (38μV
RMS
) when
choosing a reference.
Input Buffer
Most applications require an input buffer amplifier to
achieve 16-bit accuracy. If the input signal is multi-
plexed, switch the input channel immediately after acqui-
sition, rather than near the end of or after a conversion
(Figure 9). This allows the maximum time for the input
buffer amplifier to respond to a large step change in the
input signal. The input amplifier must have a slew rate of
at least 2V/μs to complete the required output voltage
change before the beginning of the acquisition time.
At the beginning of the acquisition, the internal sampling
capacitor array connects to AIN (the amplifier output),
causing some output disturbance. Ensure that the sampled
voltage has settled before the end of the acquisition time.
Digital Noise
Digital noise can couple to AIN and REF. The conver-
sion clock (SCLK) and other digital signals active dur-
ing input acquisition contribute noise to the conversion
result. Noise signals synchronous with the sampling
interval result in an effective input offset. Asynchronous
signals produce random noise on the input, whose
high-frequency components can be aliased into the fre-
quency band of interest. Minimize noise by presenting
a low impedance (at the frequencies contained in the
16-Bit, +5V, 200ksps ADC with 10μA Shutdown
10
______________________________________________________________________________________
COMPLETE CONVERSION SEQUENCE
CONVERSION 0
CONVERSION 1
POWERED UP
POWERED UP
POWERED DOWN
DOUT
CS
TIMING NOT TO SCALE.
Figure 7. Shutdown Sequence
OUTPUT CODE
FULL-SCALE
TRANSITION
11
. . .
111
11
. . .
110
11
. . .
101
00
. . .
011
00
. . .
010
00
. . .
001
00
. . .
000
1
2
3
0
FS
FS - 3/2LSB
FS = V
REF
1LSB = V
REF
INPUT VOLTAGE (LSB)
65536
Figure 8. Unipolar Transfer Function, Full Scale (FS) = V
REF
,
Zero Scale (ZS) = GND
相關(guān)PDF資料
PDF描述
MAX1162AEUB Low-Voltage Adjustable Precision Shunt Regulator 3-SOT-23 -40 to 125
MAX1162AE_B Low-Voltage Adjustable Precision Shunt Regulator 3-SOT-23 -40 to 125
MAX1162BCUB Low-Voltage Adjustable Precision Shunt Regulator 3-SOT-89 -40 to 125
MAX1162BC_B Low-Voltage Adjustable Precision Shunt Regulator 3-SOT-89 -40 to 125
MAX1162BEUB 16-Bit, +5V, 200ksps ADC with 10レA Shutdown
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1162ACUB 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1162ACUB+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1162ACUB+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1162ACUB-T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1162AE_B 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:16-Bit, +5V, 200ksps ADC with 10レA Shutdown
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