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参数资料
| 型号： | MAX1231EVKIT |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/22页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX1231 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 300k |
| 数据接口： | 串行 |
| 输入范围： | ±VREF/2 |
| 在以下条件下的电源（标准）： | 1.86mW @ 300kSPS |
| 工作温度： | 0°C ~ 70°C |
| 已用 IC / 零件： | MAX1231 |
| 已供物品： | 板，CD |
MAX1227/MAX1229/MAX1231
12-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
______________________________________________________________________________________
13
bits in the setup register. Bits 5 and 4 (CKSEL1 and
CKSEL0) control the clock mode, acquisition and sam-
pling, and the conversion start. Bits 3 and 2 (REFSEL1
and REFSEL0) control internal or external reference use.
Bits 1 and 0 (DIFFSEL1 and DIFFSEL0) address the
unipolar mode and bipolar mode registers and configure
the analog input channels for differential operation.
Unipolar/Bipolar Registers
The final 2 bits (LSBs) of the setup register control the
unipolar/bipolar mode address registers. Set bits 1 and
0 (DIFFSEL1 and DIFFSEL0) to 10 to write to the unipo-
lar mode register. Set bits 1 and 0 to 11 to write to the
bipolar mode register. In both cases, the setup byte
must be followed immediately by 1 byte of data written
to the unipolar register or bipolar register. Hold CS low
and run 16 SCLK cycles before pulling CS high. If the
last 2 bits of the setup register are 00 or 01, neither the
unipolar mode register nor the bipolar mode register is
written. Any subsequent byte is recognized as a new
input data byte. See Tables 4 and 5 to program the
unipolar and bipolar mode registers.
If a channel is configured as both unipolar and bipolar,
the unipolar setting takes precedence. In unipolar
mode, AIN+ can exceed AIN- by up to VREF. The out-
put format in unipolar mode is binary. In bipolar mode,
either input can exceed the other by up to VREF/2. The
output format in bipolar mode is two's complement.
Averaging Register
Write to the averaging register to configure the ADC to
average up to 32 samples for each requested result,
and to independently control the number of results
requested for single-channel scans.
Table 2 details the four scan modes available in the con-
version register. All four scan modes allow averaging as
long as the AVGON bit, bit 4 in the averaging register, is
set to 1. Select scan mode 10 to scan the same channel
multiple times. Clock mode 11 disables averaging.
Reset Register
Write to the reset register (as shown in Table 7) to clear
the FIFO or to reset all registers to their default states.
Set the RESET bit to 1 to reset the FIFO. Set the reset
bit to zero to return the MAX1227/MAX1229/MAX1231
to the default power-up state.
Power-Up Default State
The MAX1227/MAX1229/MAX1231 power up with all
blocks in shutdown, including the reference. All registers
power up in state 00000000, except for the setup regis-
ter, which powers up in clock mode 10 (CKSEL1 = 1).
BIT
NAME
BIT
FUNCTION
—
7 (MSB) Set to 1 to select conversion register.
CHSEL3
6
Analog input channel select.
CHSEL2
5
Analog input channel select.
CHSEL1
4
Analog input channel select.
CHSEL0
3
Analog input channel select.
SCAN1
2
Scan mode select.
SCAN0
1
Scan mode select.
TEMP
0 (LSB)
Set to 1 to take a single temperature
measurement. The first conversion result
of a scan contains temperature information.
Table 2. Conversion Register
* See below for bit details.
CHSEL3
CHSEL2
CHSEL1
CHSEL0
SELECTED
CHANNEL (N)
0
AIN0
0
1
AIN1
0
1
0
AIN2
0
1
AIN3
0
1
0
AIN4
0
1
0
1
AIN5
0
1
0
AIN6
0
1
AIN7
1
0
AIN8
1
0
1
AIN9
1
0
1
0
AIN10
1
0
1
AIN11
1
0
AIN12
1
0
1
AIN13
1
0
AIN14
1
AIN15
SCAN1 SCAN0
SCAN MODE (CHANNEL N IS
SELECTED BY BITS CHSEL3–CHSEL0)
0
Scans channels 0 through N.
01
Scans channels N through the highest
numbered channel.
10
Scans channel N repeatedly. The averaging
register sets the number of results.
1
No scan. Converts channel N once only.
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| MAX1232C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX1232CPA | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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| MAX1232CSA | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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