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參數(shù)資料
| 型號： | MAX1084BESA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | ADC |
| 英文描述： | 400ksps/300ksps, Single-Supply, Low-Power, Serial 10-Bit ADCs with Internal Reference |
| 中文描述： | 1-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
| 封裝： | 0.150 INCH, SOIC-8 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大小： | 235K |
| 代理商： | MAX1084BESA |
M
400ksps/300ksps, Single-Supply, Low-Power,
Serial 10-Bit ADCs with Internal Reference
12
______________________________________________________________________________________
3) Pull
CS
high at or after the 13th rising clock edge. If
CS
remains low, the two sub-bits and trailing zeros
are clocked out after the LSB.
4) With
CS
= high, wait the minimum specified time, t
CS
,
before initiating a new conversion by pulling
CS
low.
If a conversion is aborted by pulling
CS
high before
the conversion completes, wait the minimum acquisi-
tion time, t
ACQ
, before starting a new conversion.
CS
must be held low until all data bits are clocked out.
Data can be output in 2 bytes or continuously, as shown
in Figure 8. The bytes contain the result of the conversion
padded with three leading zeros, 2 sub-bits, and trailing
zeros if SCLK is still active with
CS
kept low.
SPI and Microwire
When using SPI or QSPI, set CPOL = 0 and CPHA = 0.
Conversion begins with a
CS
falling edge. DOUT goes
low, indicating a conversion is in progress. Two con-
secutive 1-byte reads are required to get the full 10+2
bits from the ADC. DOUT output data transitions on
SCLK’s rising edge and is clocked into the μP on the
following rising edge.
The first byte contains 3 leading zeros, and 5 bits of
conversion result. The second byte contains the remain-
ing 5 bits, 2 sub-bits, and 1 trailing zero. See Figure 11
for connections and Figure 12 for timing.
QSPI
Unlike SPI, which requires two 1-byte reads to acquire
the 10 bits of data from the ADC, QSPI allows the mini-
mum number of clock cycles necessary to clock in the
data. The MAX1084/MAX1085 require 13 clock cycles
from the μP to clock out the 10 bits of data. Additional
clock cycles clock out the 2 sub-bits followed by trailing
zeros. Figure 13 shows a transfer using CPOL = 0 and
CPHA = 1. The result of conversion contains two zeros
followed by the 10 bits of data in MSB-first format.
Layout and Grounding
For best performance, use PC boards. Wire-wrap
boards are not recommended. Board layout should
ensure that digital and analog signal lines are separat-
ed from each other. Do not run analog and digital
(especially clock) lines parallel to one another, or digital
lines underneath the ADC package.
Figure 14 shows the recommended system ground con-
nections. Establish a single-point analog ground (“star”
11
…
111
11
…
110
11
…
101
00
…
011
00
…
010
00
…
001
00
…
000
0
1
2
INPUT VOLTAGE (LSB)
FS
OUTPUT CODE
FS - 3/2LSB
FS = V
REF
- 1LSB
REF
1LSB = V
FULL-SCALE
TRANSITION
3
Figure 10. Unipolar Transfer Function, Full Scale (FS) = V
REF
-
1LSB, Zero Scale (ZS) = GND
CS
SCLK
DOUT
I/O
SCK
MISO
+3V OR +5V
SS
a) SPI
CS
SCLK
DOUT
CS
SCK
MISO
+3V OR +5V
SS
b) QSPI
MAX1084
MAX1085
MAX1084
MAX1085
MAX1084
MAX1085
CS
SCLK
DOUT
I/O
SK
SI
c) MICROWIRE
Figure 11. Common Serial-Interface Connections to the
MAX1084/MAX1085
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1084BESA+ | 功能描述:模數(shù)轉換器 - ADC 300/400ksps Sgl-Sply 4Ch Serial 10Bit 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 |
| MAX1084BESA+T | 功能描述:模數(shù)轉換器 - ADC 300/400ksps Sgl-Sply 4Ch Serial 10Bit 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 |
| MAX1084BESA-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 |
| MAX1085 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:400ksps/300ksps.Single-Supply.Low-Power.Serial 10-Bit ADCs with Internal Reference |
| MAX1085ACSA | 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 |
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