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参数资料
| 型号： | MAX192BCPP+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 22/24页 |
| 文件大小： | 0K |
| 描述： | IC DAS 8CH 10BIT LOW PWR 20-DIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 18 |
| 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： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 20-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 20-PDIP |
| 包装： | 管件 |
MAX192
Low-Power, 8-Channel,
Serial 10-Bit ADC
_______________________________________________________________________________________
7
INPUT
SHIFT
REGISTER
CONTROL
LOGIC
INT
CLOCK
OUTPUT
SHIFT
REGISTER
+2.46V
REFERENCE
T/H
ANALOG
INPUT
MUX
SAR
ADC
IN
DOUT
SSTRB
VDD
DGND
SCLK
DIN
CH0
CH1
CH3
CH2
CH7
CH6
CH5
CH4
AGND
REFADJ
VREF
OUT
REF
CLOCK
+4.096V
20k
≈ 1.65
1
2
3
4
5
6
7
8
10
11
12
13
15
16
17
18
19
CS
SHDN
A
20
14
AGND
9
MAX192
Figure 3. Block Diagram
Detailed Description
The MAX192 uses a successive-approximation conver-
sion technique and input track/hold (T/H) circuitry to
convert an analog signal to a 10-bit digital output. A
flexible serial interface provides easy interface to
microprocessors. No external hold capacitors are
required. Figure 3 shows the block diagram for the
MAX192.
Pseudo-Differential Input
The sampling architecture of the ADC’s analog com-
parator is illustrated in the Equivalent Input Circuit
(Figure 4). In single-ended mode, IN+ is internally
switched to CH0–CH7 and IN- is switched to AGND. In
differential mode, IN+ and IN- are selected from pairs
of CH0/CH1, CH2/CH3, CH4/CH5, and CH6/CH7. Refer
to Tables 1 and 2 to configure the channels.
In differential mode, IN- and IN+ are internally switched
to either one of the analog inputs. This configuration is
pseudo-differential to the effect that only the signal at
IN+ is sampled. The return side (IN-) must remain sta-
ble within ±0.5LSB (±0.1LSB for best results) with
respect to AGND during a conversion. Accomplish this
by connecting a 0.1F capacitor from AIN- (the select-
ed analog input, respectively) to AGND.
During the acquisition interval, the channel selected as
the positive input (IN+) charges capacitor CHOLD. The
acquisition interval spans three SCLK cycles and ends
on the falling SCLK edge after the last bit of the input
control word has been entered. At the end of the acqui-
sition interval, the T/H switch opens, retaining charge
on CHOLD as a sample of the signal at IN+.
The conversion interval begins with the input multiplex-
er switching CHOLD from the positive input (IN+) to the
negative input (IN-). In single-ended mode, IN- is
simply AGND. This unbalances node ZERO at the input
of the comparator. The capacitive DAC adjusts during
the remainder of the conversion cycle to restore its
node ZERO to 0V within the limits of its resolution. This
action is equivalent to transferring a charge of
16pF x (VIN+ - VIN-) from CHOLD to the binary-weighted
capacitive DAC, which in turn forms a digital represen-
tation of the analog input signal.
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
AGND
CSWITCH
TRACK
T/H
SWITCH
10k
RS
CHOLD
HOLD
CAPACITIVE DAC
VREF
ZERO
COMPARATOR
–
+
16pF
SINGLE-ENDED MODE: IN+ = CHO-CH7, IN- = AGND.
DIFFERENTIAL MODE (BIPOLAR): IN+ AND IN- SELECTED FROM PAIRS OF
CH0/CH1, CH2/CH3, CH4/CH5, CH6/CH7.
AT THE SAMPLING INSTANT,
THE MUX INPUT SWITCHES
FROM THE SELECTED IN+
CHANNEL TO THE SELECTED
IN- CHANNEL.
INPUT
MUX
Figure 4. Equivalent Input Circuit
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX192BCPP+ | 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 |
| MAX192BCWP | 功能描述:模数转换器 - ADC Integrated Circuits (ICs) 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 |
| MAX192BCWP+ | 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 |
| MAX192BCWP+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 |
| MAX192BCWP-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 |
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