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参数资料
型号： MAX186CMJP
厂商： MAXIM INTEGRATED PRODUCTS INC
元件分类： ADC
英文描述： Low-Power, 8-Channel, Serial 12-Bit ADCs
中文描述： 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CDIP20
封装： CERDIP-20
文件页数： 9/24页
文件大小： 245K
代理商： MAX186CMJP
Full Scale
V
REFADJ
x A*
Analog Input Range and Input Protec tion
Internal protection diodes, which clamp the analog
input to V
DD
and V
SS
, allow the channel input pins to
swing from V
SS
- 0.3V to V
DD
+ 0.3V without damage.
However, for accurate conversions near full scale, the
inputs must not exceed V
DD
by more than 50mV, or be
lower than V
SS
by 50mV.
If the analog input exceeds 50mV beyond the sup-
plies, do not forward bias the protection diodes of
off-channels over two milliamperes, as excessive
current will degrade the conversion accuracy of the
on-channel.
The full-scale input voltage depends on the voltage at
VREF. See Tables 1a and 1b.
Quic k Look
To evaluate the analog performance of the
MAX186/MAX188 quickly, use the circuit of Figure 5.
The MAX186/MAX188 require a control byte to be writ-
ten to DIN before each conversion. Tying DIN to +5V
feeds in control bytes of $FF (HEX), which trigger
M
Low-Power, 8-Channel,
S erial 12-Bit ADCs
_______________________________________________________________________________________
9
Reference
Zero
Scale
Full Scale
Internal Reference
(MAX186 only)
External Reference
at REFADJ
0V
+4.096V
0V
at VREF
0V
VREF
Reference
Negative
Full Scale
Zero
Scale
Internal Reference
(MAX186 only)
External Reference
at REFADJ
at VREF
-4.096V/2
0V
-1/2V
REFADJ
x A*
-1/2 VREF
0V
0V
+4.096V/2
+1/2V
REFADJ
x A*
+1/2 VREF
0.1μF
V
DD
DGND
AGND
V
SS
CS
SCLK
DIN
DOUT
SSTRB
SHDN
+5V
N.C.
0.01μF
CH7
REFADJ
VREF
C2
0.01μF
+2.5V
REFERENCE
C1
4.7μF
D1
1N4148
+5V
0V TO
4.096V
ANALOG
INPUT
+2.5V
**
OSCILLOSCOPE
CH1
CH2
CH3
CH4
* FULL-SCALE ANALOG INPUT, CONVERSION RESULT = $FFF (HEX)
**REQUIRED FOR MAX188 ONLY. A POTENTIOMETER MAY BE USED IN PLACE OF THE REFERENCE FOR TEST PURPOSES.
MAX186
MAX188
+5V
2MHz
OSCILLATOR
SCLK
SSTRB
DOUT*
Figure 5. Quick-Look Circuit
*A = 1.678 for the MAX186, 1.638 for the MAX188
Table 1b. Bipolar Full Scale, Zero Scale, and
Negative Full Scale
Table 1a. Unipolar Full Scale and Zero Scale
*A = 1.678 for the MAX186, 1.638 for the MAX188
相关PDF资料
PDF描述
MAX186ACAP Low-Power, 8-Channel, Serial 12-Bit ADCs
MAX186ACPP Low-Power, 8-Channel, Serial 12-Bit ADCs
MAX186ACWP Low-Power, 8-Channel, Serial 12-Bit ADCs
MAX186CCAP Low-Power, 8-Channel, Serial 12-Bit ADCs
MAX186BCPP Low-Power, 8-Channel, Serial 12-Bit ADCs
相关代理商/技术参数
参数描述
MAX186DC/D 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
MAX186DCAP 功能描述:模数转换器 - ADC Integrated Circuits (ICs) 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
MAX186DCAP+ 功能描述:模数转换器 - ADC 12-Bit 8Ch 133ksps 5.25V 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
MAX186DCAP+T 功能描述:模数转换器 - ADC 12-Bit 8Ch 133ksps 5.25V 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
MAX186DCAP-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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