參數(shù)資料
型號(hào): MAX1069
廠商: Maxim Integrated Products, Inc.
英文描述: 58.6ksps, 14-Bit, 2-Wire Serial ADC
中文描述: 58.6ksps、14位、2線串行ADC,14引腳TSSOP封裝
文件頁數(shù): 17/20頁
文件大?。?/td> 442K
代理商: MAX1069
Internal Reference
The MAX1069 contains an internal 4.096V bandgap ref-
erence. This bandgap reference is connected to
REFADJ through a 5k
resistor. Bypass REFADJ with a
0.1μF capacitor to AGND. The MAX1069 reference
buffer has a unity gain to provide +4.096V at REF.
Bypass REF with a 10μF capacitor to AGND when the
internal reference is used (
Figure 12
).
The internal reference is adjustable to ±1.5% using the
Figure 13
circuit.
External Reference
For external reference operation, disable the internal
reference by connecting REFADJ to AV
DD
. During con-
version, an external reference at REF must deliver up to
100μA of DC load current and have an output imped-
ance of less than 10
.
For optimal performance, buffer the reference through
an op amp and bypass REF with a 10μF capacitor.
Consider the MAX1069
s equivalent input noise
(80μV
RMS
) when choosing a reference.
Transfer Function
The MAX1069 has a standard unipolar transfer function
with a valid analog input voltage range from V
AGNDS
to
V
REF
. Output data coding is binary with 1LSB =
(V
REF
/2
N
) where
N
is the number of bits (14). Code
transitions occur halfway between successive-integer
LSB values.
Figure 14
shows the MAX1069 input/output
(I/O) transfer function.
Input Buffer
Most applications require an input buffer amplifier to
achieve 14-bit accuracy. If the input signal is multi-
plexed, the input channel should be switched immedi-
ately after acquisition, rather than near the end of or
M
58.6ksps, 14-Bit, 2-Wire Serial ADC
in a 14-Pin TSSOP
______________________________________________________________________________________
17
Figure 12. Internal Reference
4.096V
BANDGAP
REFERENCE
5k
SAR
ADC
REF
0.1
μ
F
10
μ
F
REF
REFADJ
4.096V
AGND
9
DGND
1
A
V
= 1.0
12
13
MAX1069
Figure 13. Adjusting the Internal Reference
4.096V
BANDGAP
REFERENCE
5k
SAR
ADC
REF
0.1
μ
F
10
μ
F
REF
REFADJ
4.096V
AGND
9
DGND
1
A
V
= 1.0
12
13
MAX1069
0.1
μ
F
150k
100k
POTENTIOMETER
68k
AV
DD
5.0V
8
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1069_10 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:58.6ksps, 14-Bit, 2-Wire Serial ADC in a 14-Pin TSSOP
MAX1069ACUD 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
MAX1069ACUD+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Integrated Circuits (ICs) 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
MAX1069ACUD+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Integrated Circuits (ICs) 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
MAX1069ACUD-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