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| 型号： | MAX192BEWP+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 10BIT SERIAL 20-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 36 |
| 类型： | 数据采集系统（DAS），ADC |
| 分辨率（位）： | 10 b |
| 采样率（每秒）： | 133k |
| 数据接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 电压电源： | 单电源 |
| 电源电压： | ±5V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC W |
| 包装： | 管件 |
| 产品目录页面： | 1393 (CN2011-ZH PDF) |
MAX192
MAX192 is inactive for long periods of time, but where
intermittent bursts of high-speed conversions are
required.
External and Internal References
The MAX192 can be used with an internal or external
reference. Diode D1 shown in the
Typical Operating
Circuit ensures correct start-up. Any standard signal
diode can be used. An external reference can either be
connected directly at the VREF terminal or at the
REFADJ pin.
The MAX192’s internally trimmed 2.46V reference is
buffered with a gain of 1.678 to scale an external 2.5V
reference at REFADJ to 4.096V at VREF.
Internal Reference
The full-scale range of the MAX192 with internal reference
is 4.096V with unipolar inputs, and ±2.048V with differen-
tial bipolar inputs. The internal reference voltage is
adjustable to ±1.5% with the Reference-Adjust Circuit of
Figure 17.
External Reference
An external reference can be placed at either the
input (REFADJ) or the output (VREF) of the internal
buffer amplifier. The REFADJ input impedance is
typically 20k
. At VREF, the input impedance is a
minimum of 12k
for DC currents. During conversion,
an external reference at VREF must be able to deliver
up to 350A DC load current and have an output
impedance of 10
or less. If the reference has higher
output impedance or is noisy, bypass it close to the
VREF pin with a 4.7F capacitor.
Using the buffered REFADJ input avoids external
buffering of the reference. To use the direct VREF input,
disable the internal buffer by tying REFADJ to VDD.
Transfer Function and Gain Adjust
Figure 15 depicts the nominal, unipolar input/output
(I/O) transfer function, and Figure 16 shows the differ-
ential bipolar input/output transfer function. Code
transitions occur halfway between successive integer
LSB
values.
Output
coding
is
binary
with
1LSB = 4.00mV (4.096V / 1024) for unipolar operation
and 1LSB = 4.00mV [(4.096V / 2 - -4.096V / 2)/1024]
for bipolar operation.
Figure 17, the Reference-Adjust Circuit, shows how to
adjust the ADC gain in applications that use the internal
reference. The circuit provides ±1.5% (±15LSBs) of
gain adjustment range.
Low-Power, 8-Channel,
Serial 10-Bit ADC
18
______________________________________________________________________________________
OUTPUT CODE
FULL-SCALE
TRANSITION
11 . . . 111
11 . . . 110
11 . . . 101
00 . . . 011
00 . . . 010
00 . . . 001
00 . . . 000
1
2
3
0
FS
FS - 3/2LSB
FS = +4.096V
1LSB = FS
1024
INPUT VOLTAGE (LSBs)
011 . . . 111
011 . . . 110
000 . . . 010
000 . . . 001
000 . . . 000
111 . . . 111
111 . . . 110
111 . . . 101
100 . . . 001
100 . . . 000
-FS
0V
DIFFERENTIAL INPUT VOLTAGE (LSBs)
+FS - 1LSB
FS = +4.096
2
1LSB = +4.096
1024
OUTPUT CODE
Figure 15. Unipolar Transfer Function, 4.096V = Full Scale
Figure 16. Differential Bipolar Transfer Function,
±4.096V / 2 = Full Scale
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX192BEWP+ | 功能描述:模数转换器 - ADC 10-Bit 8Ch 133ksps 5V 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 |
| MAX192BEWP+T | 功能描述:模数转换器 - ADC 10-Bit 8Ch 133ksps 5V 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 |
| MAX192BEWP-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 |
| MAX192BMJP | 制造商:Maxim Integrated Products 功能描述:LOW-POWER, 8-CHANNEL, SERIAL 10-BIT ADC - Rail/Tube |
| MAX192BMWP/PR | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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