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參數(shù)資料
| 型號： | 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)： | 11/20頁 |
| 文件大小： | 442K |
| 代理商： | MAX1069 |
Detailed Description
The MAX1069 analog-to-digital converter (ADC) uses
successive-approximation conversion (SAR) tech-
niques and on-chip track-and-hold (T/H) circuitry to
capture and convert an analog signal to a serial 14-bit
digital output.
The MAX1069 performs a unipolar conversion on its
single analog input using its internal 4MHz clock. The
full-scale analog input range is determined by the inter-
nal reference or by an externally applied reference volt-
age ranging from 1V to AV
DD
.
The flexible 2-wire serial interface provides easy con-
nection to microcontrollers (μCs) and supports data
rates up to 1.7MHz.
Figure 3
shows the simplified func-
tional diagram for the MAX1069 and
Figure 4
shows the
typical application circuit.
Power Supply
To maintain a low-noise environment, the MAX1069
provides separate analog and digital power-supply
inputs. The analog circuitry requires a +5V supply and
consumes only 900μA at sampling rates up to
58.6ksps. The digital supply voltage accepts voltages
from +2.7V to +5.5V to ensure compatibility with low-
voltage ASICs. The MAX1069 wakes up in shutdown
mode when power is applied irrespective of the AV
DD
and DV
DD
sequence.
Analog Input and Track/Hold
The MAX1069 analog input contains a track-and-hold
(T/H) capacitor, T/H switches, comparator, and a
switched capacitor digital-to-analog converter (DAC)
(
Figure 5
).
As shown in
Figure 11c
, the MAX1069 acquisition peri-
od is the two clock cycles prior to the conversion peri-
od. The T/H switches are normally in the hold position.
During the acquisition period the T/H switches are in
the track position and C
T/H
charges to the analog input
signal. Before a conversion begins, the T/H switches
move to the hold position retaining the charge on C
T/H
as a sample of the analog input signal.
During the conversion interval, the switched capacitive
DAC adjusts to restore the comparator input voltage to
zero within the limits of 14-bit resolution. This is equiva-
lent to transferring a charge of 35pF
×
(V
AIN
- V
AGNDS
)
from C
T/H
to the binary-weighted capacitive DAC,
M
58.6ksps, 14-Bit, 2-Wire Serial ADC
in a 14-Pin TSSOP
______________________________________________________________________________________
11
Pin Description
PIN
NAME
FUNCTION
1
DGND
Digital Ground
2
SCL
Clock Input
3
SDA
Data Input/Output
4
ADD2
Address Select Input 2
5
ADD1
Address Select Input 1
6
ADD0
Address Select Input 0
7
DV
DD
Digital Power Input. Bypass to DGND with a 0.1μF capacitor.
8
AV
DD
Analog Power Input. Bypass to AGND with a 0.1μF capacitor.
9
AGND
Analog Ground
10
AIN
Analog Input
11
AGNDS
Analog Signal Ground. Negative reference for analog input. Connect to AGND.
12
REFADJ
Internal Reference Output and Reference Buffer Input. Bypass to AGND with a 0.1μF capacitor.
Connect REFADJ to AV
DD
to disable the internal bandgap reference and reference-buffer amplifier.
13
REF
Reference Buffer Output and External Reference Input. Bypass to AGND with a 10μF capacitor
when using the internal reference.
14
ADD3
Address Select Input 3
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相關代理商/技術參數(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)轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1069ACUD+ | 功能描述:模數(shù)轉換器 - ADC Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1069ACUD+T | 功能描述:模數(shù)轉換器 - ADC Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1069ACUD-T | 功能描述:模數(shù)轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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