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参数资料
| 型号： | MAX1157BEUI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/15页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT 135KSPS 28-TSSOP |
| 标准包装： | 50 |
| 系列： | * |
| 位数： | 14 |
| 采样率（每秒）： | 135k |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 1.03W |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 管件 |
| 输入数目和类型： | 1 个单端，单极 |
MAX1157/MAX1159/MAX1175
Track and Hold (T/H)
In track mode, the internal hold capacitor acquires the
analog signal (see Figure 4). In hold mode, the T/H
switches open and the capacitive DAC samples the
analog input. During the acquisition, the analog input
(AIN) charges capacitor CHOLD. The acquisition ends
on the second falling edge of CS. At this instant, the
T/H switches open. The retained charge on CHOLD rep-
resents a sample of the input. In hold mode, the capac-
itive DAC adjusts during the remainder of the
conversion time to restore node T/H OUT to zero within
the limits of 14-bit resolution. Force CS low to put valid
data on the bus after conversion is complete.
Power-Down Modes
Select standby mode or shutdown mode with R/C during
the second falling edge of CS (see Selecting Standby or
Shutdown Mode section). The MAX1157/MAX1159/
MAX1175 automatically enter either standby mode (refer-
ence and buffer on), or shutdown (reference and buffer
off) after each conversion depending on the status of
R/C during the second falling edge of CS.
Internal Clock
The MAX1157/MAX1159/MAX1175 generate an internal
conversion clock to free the microprocessor from the bur-
den of running the SAR conversion clock. Total conver-
sion time after entering hold mode (second falling edge
of CS) to end-of-conversion (EOC) falling is 4.7s (max).
Applications Information
Starting a Conversion
CS and R/C control acquisition and conversion in the
MAX1157/MAX1159/MAX1175 (see Figure 2). The first
falling edge of CS powers up the device and puts it in
acquire mode if R/C is low. The convert start CS is
ignored if R/C is high. The MAX1157/MAX1159/
MAX1175 need at least 6ms (CREFADJ = 0.1F, CREF =
10F) for the internal reference to wake up and settle
before starting the conversion if powering up from shut-
down. Reset the MAX1157/MAX1159/MAX1175 by tog-
gling RESET with CS high. The next falling edge of CS
begins acquisition.
Selecting Standby or Shutdown Mode
The MAX1157/MAX1159/MAX1175 have a selectable
standby or low-power shutdown mode. In standby
mode, the ADC’s internal reference and reference
buffer do not power down between conversions, elimi-
nating the need to wait for the reference to power up
before performing the next conversion. Shutdown mode
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
8
_______________________________________________________________________________________
Figure 2. MAX1157/MAX1159/MAX1175 Timing Diagram
tCSL
tCSH
tACQ
tDH
R/C
CS
EOC
D0–D13
tDS
tDV
tEOC
tDO
tBR
tCONV
HIGH-Z
REF POWER-
DOWN CONTROL
HIGH-Z
DATA VALID
Figure 3. Typical Application Circuit for the MAX1157/MAX1159/
MAX1175
MAX1157
MAX1159
MAX1175
ANALOG
INPUT
AIN
AVDD
+5V ANALOG
+5V DIGITAL
DVDD
D0–D13
14-BIT
WIDE
P DATA
BUS
10
F
0.1
F
0.1
F
0.1
F
R/C
CS
AGND DGND
REFADJ
REF
EOC
RESET
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1157BEUI+ | 功能描述:模数转换器 - ADC 14-Bit 135ksps 4.2V 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 |
| MAX1157BEUI+T | 功能描述:模数转换器 - ADC 14-Bit 135ksps 4.2V 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 |
| MAX1157BEUI-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 |
| MAX1158 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:14-Bit.135ksps.Single-Supply ADCs with Bipolar Analog Input Range |
| MAX1158ACUP | 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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