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参数资料
| 型号： | MAX1271BCNG |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | ADC |
| 英文描述： | Multirange, +5V, 8-Channel, Serial 12-Bit ADCs |
| 中文描述： | 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP24 |
| 封装： | 0.300 INCH, PLASTIC, DIP-24 |
| 文件页数： | 13/20页 |
| 文件大小： | 808K |
| 代理商： | MAX1271BCNG |
M
Multirange, +5V, 8-Channel,
Serial 12-Bit ADCs
______________________________________________________________________________________
13
Internal Clock Mode (PD1 = 0, PD0 = 0)
In internal clock mode, the MAX1270/MAX1271 gener-
ate their conversion clock internally. This frees the
microprocessor from the burden of running the acquisi-
tion and the SAR conversion clock, and allows the con-
version results to be read back at the processor’s
convenience, at any clock rate from 0 to typically
10MHz.
SSTRB goes low after the falling edge of the last bit
(PD0) of the control byte has been shifted in, and
returns high when the conversion is complete.
Acquisition is completed and conversion begins on the
falling edge of the 4th internal clock pulse after the con-
trol byte; conversion ends on the falling edge of the
16th internal clock pulse (12 internal clock cycle pulses
are used for conversion). SSTRB will remain low for a
maximum of 15μs, during which time SCLK should
remain low for best noise performance. An internal reg-
ister stores data while the conversion is in progress.
The MSB of the result byte (D11) is present at DOUT
starting at the falling edge of the last internal clock of
conversion. Successive falling edges of SCLK will shift
the remaining data out of this register (Figure 9).
Additional SCLK edges will result in zeros on DOUT.
When internal clock mode is selected, SSTRB does not
go into a high-impedance state when
CS
goes high.
Pulling
CS
high prevents data from being clocked in
and tri-states DOUT, but does not adversely affect a
t
SDV
t
SSTRB
SCLK 12
t
STR
SSTRB
SCLK
CS
t
SSTRB
HIGH-Z
HIGH-Z
Figure 7. External Clock Mode—SSTRB Detailed Timing
CS
SCLK
DIN
DOUT
A/D STATE
13
19
24
26
31
32
14
16
37
START
SEL2 SEL1 SEL0
BIP
RNG
PD1 PD0
D11 D10 D9
D7
D8
D6
D5
D4
D2
D3
D1
D0
LSB
8
1
MSB
LSB
MSB
START
SEL2 SEL1 SEL0
BIP
RNG
PD1 PD0
START
SEL2
CONTROL BYTE 0
RESULT
CONTROL BYTE 1
CONTROL BYTE 2
18 SCLK
18 SCLK
SSTRB
D10
D11
D9
D8
D6
D7
D5
RESULT 1
ACQUISITION
6 SCLK
CONVERSION
12 SCLK
ACQUISITION
6 SCLK
CONVERSION
12 SCLK
HIGH-Z
HIGH-Z
Figure 8. External Clock Mode—18 Clocks/Conversion Timing
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1270BENG | Multirange, +5V, 8-Channel, Serial 12-Bit ADCs |
| MAX1271BENG | Multirange, +5V, 8-Channel, Serial 12-Bit ADCs |
| MAX1270 | Multirange, +5V, 8-Channel, Serial 12-Bit ADCs |
| MAX1270-MAX1271 | Multirange, +5V, 8-Channel, Serial 12-Bit ADCs |
| MAX1270ACAI | Multirange, +5V, 8-Channel, Serial 12-Bit ADCs |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1271BCNG+ | 功能描述:模数转换器 - ADC 12-Bit 8Ch 110ksps 4.18V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1271BEAI | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1271BEAI+ | 功能描述:模数转换器 - ADC 12-Bit 8Ch 110ksps 4.18V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1271BEAI+T | 功能描述:模数转换器 - ADC 12-Bit 8Ch 110ksps 4.18V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1271BEAI-T | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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