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参数资料
| 型号： | MAX1229AEEP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/22页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 300KSPS 20-QSOP |
| 标准包装： | 2,500 |
| 位数： | 12 |
| 采样率（每秒）： | 300k |
| 数据接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 727mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 20-QSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 12 个单端，单极；12 个单端，双极；6 个差分，单极；6 个差分，双极 |
MAX1227/MAX1229/MAX1231
12-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
______________________________________________________________________________________
15
Temperature Measurements
The MAX1227/MAX1229/MAX1231 perform tempera-
ture measurements with an internal diode-connected
transistor. The diode bias current changes from 68A
to 4A to produce a temperature-dependent bias volt-
age difference. The second conversion result at 4A is
subtracted from the first at 68A to calculate a digital
value that is proportional to absolute temperature. The
output data appearing at DOUT is the above digital
code minus an offset to adjust from Kelvin to Celsius.
The reference voltage used for the temperature mea-
surements is derived from the internal reference source
to ensure that 1 LSB corresponds to 1/8 of a degree.
Output Data Format
Figures 4–7 illustrate the conversion timing for the
MAX1227/MAX1229/MAX1231. The 12-bit conversion
result is output in MSB-first format with four leading
zeros. DIN data is latched into the serial interface on
the rising edge of SCLK. Data on DOUT transitions on
the falling edge of SCLK. Conversions in clock modes 00
and 01 are initiated by CNVST. Conversions in clock
modes 10 and 11 are initiated by writing an input data
byte to the conversion register. Data is binary for unipo-
lar mode and two’s complement for bipolar mode.
BIT NAME
BIT
FUNCTION
UCH0/1
7 (MSB)
Set to 1 to configure AIN0 and AIN1 for unipolar differential conversion.
UCH2/3
6
Set to 1 to configure AIN2 and AIN3 for unipolar differential conversion.
UCH4/5
5
Set to 1 to configure AIN4 and AIN5 for unipolar differential conversion.
UCH6/7
4
Set to 1 to configure AIN6 and AIN7 for unipolar differential conversion.
UCH8/9
3
Set to 1 to configure AIN8 and AIN9 for unipolar differential conversion (MAX1229/MAX1231 only).
UCH10/11
2
Set to 1 to configure AIN10 and AIN11 for unipolar differential conversion (MAX1229/MAX1231 only).
UCH12/13
1
Set to 1 to configure AIN12 and AIN13 for unipolar differential conversion (MAX1231 only).
UCH14/15
0 (LSB)
Set to 1 to configure AIN14 and AIN15 for unipolar differential conversion (MAX1231 only).
Table 4. Unipolar Mode Register (Addressed Through Setup Register)
BIT NAME
BIT
FUNCTION
BCH0/1
7 (MSB)
Set to 1 to configure AIN0 and AIN1 for bipolar differential conversion.
BCH2/3
6
Set to 1 to configure AIN2 and AIN3 for bipolar differential conversion.
BCH4/5
5
Set to 1 to configure AIN4 and AIN5 for bipolar differential conversion.
BCH6/7
4
Set to 1 to configure AIN6 and AIN7 for bipolar differential conversion.
BCH8/9
3
Set to 1 to configure AIN8 and AIN9 for bipolar differential conversion (MAX1229/MAX1231 only).
BCH10/11
2
Set to 1 to configure AIN10 and AIN11 for bipolar differential conversion (MAX1229/MAX1231 only).
BCH12/13
1
Set to 1 to configure AIN12 and AIN13 for bipolar differential conversion (MAX1231 only).
BCH14/15
0 (LSB)
Set to 1 to configure AIN14 and AIN15 for bipolar differential conversion (MAX1231only).
Table 5. Bipolar Mode Register (Addressed Through Setup Register)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1229BCEP | 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 |
| MAX1229BCEP+ | 功能描述:模数转换器 - ADC 12-Bit 12Ch 300ksps 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 |
| MAX1229BCEP+T | 功能描述:模数转换器 - ADC 12-Bit 12Ch 300ksps 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 |
| MAX1229BCEP-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 |
| MAX1229BEEP | 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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