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参数资料
| 型号： | MAX1188 |
| 厂商： | Maxim Integrated Products, Inc. |
| 元件分类： | ADC |
| 英文描述： | 16-Bit. 135ksps. Single-Supply ADCs with Bipolar Analog Input Range |
| 中文描述： | 16位、135ksps、单电源ADC，提供双极性模拟输入范围 |
| 文件页数： | 7/14页 |
| 文件大小： | 330K |
| 代理商： | MAX1188 |
Detailed Description
Converter Operation
The MAX1178/MAX1188 use a successive-approxima-
tion (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
Func-
tional Diagram
shows a simplified internal architecture of
the MAX1178/MAX1188. Figure 3 shows a typical oper-
ating circuit for the MAX1178/MAX1188.
Analog Input
Input Scaler
The MAX1178/MAX1188 have an input scaler, which
allows conversion of true bipolar input voltages and
input voltages greater than the power supply, while
operating 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). The MAX1178 input voltage range is ±5V, while
the MAX1188 input voltage range is ±10V. Figure 4
shows the equivalent input circuit of the MAX1178/
MAX1188. This circuit limits the current going into or
out of AIN to less than 1.8mA.
Track and Hold (T/H)
In track mode, the internal hold capacitor acquires the
analog signal (Figure 4). In hold mode, the T/H switch-
es 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
repre-
sents a sample of the input. In hold mode, the capaci-
tive 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 ADCs with
Bipolar Analog Input Range
_______________________________________________________________________________________
7
Pin Description (continued)
PIN
NAME
FUNCTION
13
HBEN
High-Byte Enable Input. Used to multiplex the 16-bit conversion result.
1: MSB available on the data bus.
0: LSB available on the data bus.
14
CS
Convert Start. The first falling edge of
CS
powers up the device and enables acquire mode when R/
C
is low. The second falling edge of
CS
starts conversion. The third falling edge of
CS
loads the result
onto the bus when R/
C
is high.
15
16
17
18
19
20
DGND
DV
DD
D0/D8
D1/D9
D2/D10
D3/D11
Digital Ground
Digital Supply Voltage. Bypass with a 0.1μF capacitor to DGND.
Tri-State Digital-Data Output. D0 is the LSB.
Tri-State Digital-Data Output
Tri-State Digital-Data Output
Tri-State Digital-Data Output
DGND
1mA
C
LOAD
= 20pF
DO
–
D15
DO
–
D15
C
LOAD
= 20pF
1mA
DGND
DV
DD
a) HIGH-Z TO V
,
V
OL
TO V
, 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
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1178ACUP | 16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range |
| MAX1178AEUP | 16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range |
| MAX1178BCUP | 16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range |
| MAX1178CCUP | 16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range |
| MAX1178CEUP | 16-Bit, 135ksps, Single-Supply ADCs with Bipolar Analog Input Range |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1188ACUP | 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 |
| MAX1188ACUP+ | 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 |
| MAX1188ACUP+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 |
| MAX1188ACUP-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 |
| MAX1188AEUP | 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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