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參數(shù)資料
| 型號(hào)： | MAX1065AEUI |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | ADC |
| 英文描述： | Low-Power, 14-Bit Analog-to-Digital Converters with Parallel Interface |
| 中文描述： | 1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO28 |
| 封裝： | 4.40 MM, TSSOP-28 |
| 文件頁(yè)數(shù)： | 10/14頁(yè) |
| 文件大小： | 335K |
| 代理商： | MAX1065AEUI |
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M
Standby Mode
While in standby mode, the supply current is reduced
to less than 1mA (typ). The next falling edge of
CS
with
R/
C
low causes the MAX1065/MAX1066 to exit standby
mode and begin acquisition. The reference and refer-
ence buffer remain active to allow quick turn-on time.
Standby mode allows significant power savings while
running at the maximum sample rate.
Shutdown Mode
In shutdown mode, the reference and reference buffer
are shut down between conversions. Shutdown mode
reduces supply current to 0.5μA (typ) immediately after
the conversion. The falling edge of
CS
with R/
C
low
causes the reference and buffer to wake up and enter
acquisition mode. To achieve 14-bit accuracy, allow
10ms (C
REFADJ
= 0.1μF, C
REF
= 1μF) for the internal
reference to wake up. Increase wakeup time propor-
tionally when using larger values of C
REFADJ
and C
REF
.
Internal and External Reference
Internal Reference
The internal reference of the MAX1065/MAX1066 is
internally buffered to provide 4.096V (typ) output at
REF. Bypass REF to AGND and REFADJ to AGND with
1μF and 0.1μF respectively. Fine adjustments can be
made to the internal reference voltage by sinking or
sourcing current at REFADJ. The input impedance at
REFADJ is nominally 5k
. The internal reference volt-
age is adjustable to ±1.5% with the circuit of Figure 7.
External Reference
An external reference can be placed at either the input
(REFADJ) or the output (REF) of the MAX1065/
MAX1066
’
s internal buffer amplifier. When connecting
an external reference to REFADJ, the input impedance
is typically 5k
. Using the buffered REFADJ input
makes buffering the external reference unnecessary;
however, the internal buffer output must be bypassed
at REF with a 1μF capacitor.
Connect REFADJ to AV
DD
to disable the internal buffer.
Directly drive REF using an external reference. During
conversion, the external reference must be able to
drive 100μA of DC load current and have an output
impedance of 10
or less. REFADJ
’
s impedance is typ-
ically 5k
. The DC input impedance of REF is 40k
minimum.
For optimal performance, buffer the reference through
an op amp and bypass REF with a 1μF capacitor.
Consider the MAX1065/MAX1066
’
s equivalent input
noise (80μV
RMS
) when choosing a reference.
Low-Power, 14-Bit Analog-to-Digital Converters
with Parallel Interface
10
______________________________________________________________________________________
AUTO-ZERO
RAIL
CAPACITIVE DAC
C
DAC
= 32pF
REF
AGND
TRACK
HOLD
HOLD
TRACK
ZERO
R
IN
800
AIN
C
SWITCH
3pF
Figure 4. Equivalent Input Circuit
CS
R/C
EOC
REF
AND
BUFFER
REF POWER-
DOWN BIT
ACQUISITION
CONVERSION
DATA
OUT
Figure 5. Selecting Standby Mode
CS
EOC
REF
AND
BUFFER
REF POWER-
DOWN BIT
ACQUISITION
CONVERSION
DATA
OUT
R/C
Figure 6. Selecting Shutdown Mode
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| MAX1065BCUI | Low-Power, 14-Bit Analog-to-Digital Converters with Parallel Interface |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1065AEUI+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Power 14-Bit w/Parallel Interface 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 輸入類型:Differential 信噪比:107 dB 接口類型: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 |
| MAX1065AEUI+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Power 14-Bit w/Parallel Interface 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 輸入類型:Differential 信噪比:107 dB 接口類型: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 |
| MAX1065AEUI-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 輸入類型:Differential 信噪比:107 dB 接口類型: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 |
| MAX1065BCUI | 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 輸入類型:Differential 信噪比:107 dB 接口類型: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 |
| MAX1065BCUI+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Power 14-Bit w/Parallel Interface 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 輸入類型:Differential 信噪比:107 dB 接口類型: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 |
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