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参数资料
| 型号： | MAX1177BEUP |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | ADC |
| 英文描述： | 16-Bit, 135ksps, Single-Supply ADC with 0 to 10V Input Range |
| 中文描述： | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO20 |
| 封装： | 4.40 MM, MO-153AC, TSSOP-20 |
| 文件页数： | 7/13页 |
| 文件大小： | 293K |
| 代理商： | MAX1177BEUP |
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 (μPs). 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 C
HOLD
. The acquisition ends on the second
falling edge of
CS
. At this instant, the T/H switches
open. The retained charge on C
HOLD
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.
M
16-Bit, 135ksps, Single-Supply ADC
with 0 to 10V Input Range
_______________________________________________________________________________________
7
DGND
1mA
C
LOAD
= 20pF
DO
–
D15
DO
–
D15
C
LOAD
= 20pF
1mA
DGND
DV
DD
a) HIGH-Z TO V
OH
,
V
OL
TO V
OH
, AND
V
OH
TO HIGH-Z
b) HIGH-Z TO V
,
V
OH
TO V
, AND
V
OL
TO HIGH-Z
Figure 1. Load Circuits
CS
R/C
REF POWER-
DOWN CONTROL
EOC
t
ACQ
t
CONV
t
CSH
t
CSL
t
DH
t
DO
t
EOC
t
DS
t
DV
HBEN
D7/D15
–
D0/D8
HIGH/LOW
BYTE VALID
HIGH/LOW
BYTE VALID
t
DO
t
DO1
HIGH-Z
t
BR
HIGH-Z
Figure 2. MAX1177 Timing Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1177BEUP+ | 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 |
| MAX1177BEUP+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 |
| MAX1177BEUP-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 |
| 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 |
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