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| 型号： | MAX1177BEUP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/13页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 135KSPS 20-TSSOP |
| 标准包装： | 2,500 |
| 位数： | 16 |
| 采样率（每秒）： | 135k |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 879mW |
| 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： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个单端，单极 |
Detailed Description
Converter Operation
The MAX1177 uses a successive-approximation (SAR)
conversion technique with an inherent track-and-hold
(T/H) stage to convert an analog input into a 16-bit digital
output. Parallel outputs provide a high-speed interface to
microprocessors (Ps). The Functional Diagram shows a
simplified internal architecture of the MAX1177. Figure 3
shows a typical operating circuit for the MAX1177.
Analog Input
Input Scaler
The MAX1177 has an input scaler, which allows conver-
sion of input voltages ranging from 0 to 10V, while oper-
ating from a single +5V analog supply. The input scaler
attenuates and shifts the analog input to match the input
range of the internal digital-to-analog converter (DAC).
Figure 4 shows the equivalent input circuit of the
MAX1177. This circuit limits the current going into AIN to
less than 2mA.
Track and Hold (T/H)
In track mode, the internal hold capacitor acquires the
analog signal (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 represents a sam-
ple of the input. In hold mode, the capacitive DAC
adjusts during the remainder of the conversion time to
restore node T/H OUT to zero within the limits of 16-bit
resolution. Force CS low to put valid data on the bus
after conversion is complete.
MAX1177
16-Bit, 135ksps, Single-Supply ADC
with 0 to 10V Input Range
_______________________________________________________________________________________
7
DGND
1mA
CLOAD = 20pF
DO–D15
CLOAD = 20pF
1mA
DGND
DVDD
a) HIGH-Z TO VOH,
VOL TO VOH, AND
VOH TO HIGH-Z
b) HIGH-Z TO VOL,
VOH TO VOL, AND
VOL TO HIGH-Z
Figure 1. Load Circuits
CS
R/C
REF POWER-
DOWN CONTROL
EOC
tACQ
tCONV
tCSH
tCSL
tDH
tDO
tEOC
tDS
tDV
HBEN
D7/D15–D0/D8
HIGH/LOW
BYTE VALID
HIGH/LOW
BYTE VALID
tDO
tDO1
HIGH-Z
tBR
HIGH-Z
Figure 2. MAX1177 Timing Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1177CCUP | 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 |
| MAX1177CCUP+ | 功能描述:模数转换器 - ADC 16-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 |
| MAX1177CCUP+T | 功能描述:模数转换器 - ADC 16-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 |
| MAX1177CCUP-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 |
| MAX1177CEUP | 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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