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參數(shù)資料
| 型號： | MAX1072CTC-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | ADC |
| 英文描述： | 1.8Msps, Single-Supply, Low-Power, True-Differential, 10-Bit ADCs |
| 中文描述： | 1-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, QCC12 |
| 封裝： | 4 X 4 MM, 0.80 MM, MO-220, TQFN-12 |
| 文件頁數(shù)： | 11/18頁 |
| 文件大?。?/td> | 1124K |
| 代理商： | MAX1072CTC-T |
Applications Information
External Reference
An external reference is required for the MAX1072/
MAX1075. Use a 4.7μF and 0.01μF bypass capacitor on
the REF pin for best performance. The reference input
structure allows a voltage range of +1V to V
DD
.
How to Start a Conversion
An analog-to-digital conversion is initiated by CNVST,
clocked by SCLK, and the resulting data is clocked out
on DOUT by SCLK. With SCLK idling high or low, a
falling edge on CNVST begins a conversion. This causes
the analog input stage to transition from track to hold
mode, and DOUT to transition from high impedance to
being actively driven low. A total of 16 SCLK cycles are
required to complete a normal conversion. If CNVST is
low during the 16th falling SCLK edge, DOUT returns to
high impedance on the next rising edge of CNVST or
SCLK, enabling the serial interface to be shared by multi-
ple devices. If CNVST returns high after the 14th, but
before the 16th SCLK rising edge, DOUT remains active
so continuous conversions can be sustained. The high-
est throughput is achieved when performing continuous
conversions. Figure 10 illustrates a conversion using a
typical serial interface.
Connection to
Standard Interfaces
The MAX1072/MAX1075 serial interface is fully compati-
ble with SPI/QSPI and MICROWIRE (see Figure 11). If a
serial interface is available, set the CPU
’
s serial interface
in master mode so the CPU generates the serial clock.
Choose a clock frequency up to 28.8MHz.
SPI and MICROWIRE
When using SPI or MICROWIRE, the MAX1072/MAX1075
are compatible with all four modes programmed with the
CPHA and CPOL bits in the SPI or MICROWIRE control
register. Conversion begins with a CNVST falling edge.
DOUT goes low, indicating a conversion is in progress.
Two consecutive 1-byte reads are required to get the full
10 bits from the ADC. DOUT transitions on SCLK rising
edges. DOUT is guaranteed to be valid t
DOUT
later and
remains valid until t
DHOLD
after the following SCLK rising
edge. When using CPOL = 0 and CPHA = 0 or CPOL = 1
and CPHA = 1, the data is clocked into the μP on the
following rising edge. When using CPOL = 0 and CPHA
= 1 or CPOL = 1 and CPHA = 0, the data is clocked
into the μP on the next falling edge. See Figure 11 for
connections and Figures 12 and 13 for timing. See the
Timing Characteristics
section to determine the best
mode to use.
M
1.8Msps, Single-Supply, Low-Power,
True-Differential, 10-Bit ADCs
______________________________________________________________________________________
11
OUTPUT CODE
FULL-SCALE
TRANSITION
111...111
1
2
3
0
FS
FS - 3/2 LSB
FS = V
REF
DIFFERENTIAL INPUT
VOLTAGE (LSB)
1 LSB = V
REF
1024
111...110
111...101
000...011
000...010
000...001
000...000
ZS = 0
Figure 8. Unipolar Transfer Function (MAX1072 Only)
OUTPUT CODE
FULL-SCALE
TRANSITION
FS
0
FS
FS - 3/2 LSB
DIFFERENTIAL INPUT
VOLTAGE (LSB)
011...111
011...110
000...010
000...001
000...000
111...111
111...110
111...101
100...001
100...000
1 LSB = V
REF
1024
FS = V
REF
2
- FS = -V
REF
2
ZS = 0
Figure 9. Bipolar Transfer Function (MAX1075 Only)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1072ETC | 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 |
| MAX1072ETC+ | 功能描述:模數(shù)轉換器 - ADC 10Bit 1.8Msps Single Sply True Diff 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 |
| MAX1072ETC+T | 功能描述:模數(shù)轉換器 - ADC 10Bit 1.8Msps Single Sply True Diff 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 |
| MAX1072ETC-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 |
| MAX1075 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:1.8Msps, Single-Supply, Low-Power, True-Differential, 10-Bit ADCs |
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