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参数资料
| 型号： | MAX1240AEPA |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | ADC |
| 英文描述： | LJT 37C 37#22D SKT PLUG |
| 中文描述： | 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8 |
| 封装： | ROHS COMPLIANT, PLASTIC, DIP-8 |
| 文件页数： | 11/16页 |
| 文件大小： | 280K |
| 代理商： | MAX1240AEPA |
End of conversion (EOC) is signaled by DOUT going
high. DOUT’s rising edge can be used as a framing
signal. SCLK shifts the data out of this register any time
after the conversion is complete. DOUT transitions on
SCLK’s falling edge. The next falling clock edge pro-
duces the MSB of the conversion at DOUT, followed by
the remaining bits. Since there are 12 data bits and one
leading high bit, at least 13 falling clock edges are
needed to shift out these bits. Extra clock pulses occur-
ring after the conversion result has been clocked out,
and prior to a rising edge of
CS
, produce trailing zeros
at DOUT and have no effect on converter operation.
Minimum cycle time is accomplished by using DOUT’s
rising edge as the EOC signal. Clock out the data with
12.5 clock cycles at full speed. Pull
CS
high after read-
ing the conversion’s LSB. After the specified minimum
time (t
CS
),
CS
can be pulled low again to initiate the
next conversion.
Output Coding and T ransfer Func tion
The data output from the MAX1240/MAX1241 is binary,
and Figure 10 depicts the nominal transfer function.
Code transitions occur halfway between successive-
integer LSB values. If V
REF
= +2.500V, then 1 LSB =
610μV or 2.500V/4096.
____________Applic ations Information
Connec tion to S tandard Interfac es
The MAX1240/MAX1241 serial interface is fully compat-
ible with SPI/QSPI and MICROWIRE standard serial
interfaces (Figure 11).
If a serial interface is available, set the CPU’s serial
interface in master mode so the CPU generates the ser-
ial clock. Choose a clock frequency up to 2.1MHz.
1) Use a general-purpose I/O line on the CPU to pull
CS
low. Keep SCLK low.
2) Wait the for the maximum conversion time specified
before activating SCLK. Alternatively, look for a DOUT
rising edge to determine the end of conversion.
3) Activate SCLK for a minimum of 13 clock cycles. The
first falling clock edge produces the MSB of the
DOUT conversion. DOUT output data transitions on
SCLK’s falling edge and is available in MSB-first for-
mat. Observe the SCLK to DOUT valid timing char-
acteristic. Data can be clocked into the μP on
SCLK’s rising edge.
4) Pull
CS
high at or after the 13th falling clock edge. If
CS
remains low, trailing zeros are clocked out after
the LSB.
M
+2.7V, Low-Power,
12-Bit S erial ADCs in 8-Pin S O
______________________________________________________________________________________
11
11
…
111
11
…
110
11
…
101
00
…
011
00
…
010
00
…
001
00
…
000
0
1
2
FS
OUTPUT CODE
FS - 3/2LSB
INPUT VOLTAGE (LSBs)
FS = V
REF
- 1LSB
REF
1LSB = V
FULL-SCALE
TRANSITION
3
…
…
…
…
CS
SCLK
DOUT
INTERNAL
T/H
(TRACK/ACQUIRE)
t
CS0
t
CONV
t
DV
t
APR
t
STR
(HOLD)
(TRACK/ACQUIRE)
B2
B1
B0
t
CH
t
DO
t
CL
t
TR
t
CS
Figure 10. Unipolar Transfer Function, Full Scale (FS) = V
REF
-
1LSB, Zero Scale (ZS) = GND
Figure 9. Detailed Serial-Interface Timing
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1241AEPA | Circular Connector; No. of Contacts:37; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:15-35 RoHS Compliant: No |
| MAX1241BEPA | +2.7V, Low-Power, 12-Bit Serial ADCs in 8-Pin SO |
| MAX1240BEPA | +2.7V, Low-Power, 12-Bit Serial ADCs in 8-Pin SO |
| MAX1240CCSA | +2.7V, Low-Power, 12-Bit Serial ADCs in 8-Pin SO |
| MAX1241CCSA | +2.7V, Low-Power, 12-Bit Serial ADCs in 8-Pin SO |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1240AEPA+ | 功能描述:模数转换器 - ADC 12-Bit 73ksps 3.6V 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 |
| MAX1240AESA | 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 |
| MAX1240AESA/V+ | 功能描述:模数转换器 - ADC 12-Bit 73ksps 3.6V 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 |
| MAX1240AESA/V+T | 功能描述:模数转换器 - ADC 12-Bit 73ksps 3.6V 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 |
| MAX1240AESA+ | 功能描述:模数转换器 - ADC 12-Bit 73ksps 3.6V 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 |
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