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参数资料
| 型号： | MAX195BEPE |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | ADC |
| 英文描述： | 16-Bit, 85ksps ADC with 10レA Shutdown |
| 中文描述： | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP16 |
| 封装： | 0.300 INCH, PLASTIC, DIP-16 |
| 文件页数： | 18/28页 |
| 文件大小： | 311K |
| 代理商： | MAX195BEPE |
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M
An OR gate is used to synchronize the “start” signal to
the asynchronous CLK, as described in the External
Clock section. As with Mode 1, the QSPI processor must
run CLK during calibration and either count CLK cycles
or, as is done here, monitor
EOC
to determine when cal-
ibration is complete. Also,
EOC
is polled by the μP to
determine when a conversion result is available. When
EOC
goes low, data is clocked out at the highest QSPI
data rate (4.19Mbps). After the data is transferred, a
new conversion can be initiated whenever desired.
The timing specification for SCLK-to-DOUT valid (t
SD
)
imposes some constraints on the serial interface. At
SCLK rates up to 2.5Mbps, data is clocked out of the
MAX195 by a falling edge of SCLK and may be
clocked into the μP by the next rising edge (CPOL = 0,
CPHA = 0). For data rates greater than 2.5Mbps (or for
lower rates, if desired) it is necessary to clock data out
of the MAX195 on SCLK’s falling edge and to clock it
into the μP on SCLK’s next falling edge (CPOL = 0,
CPHA = 1). Also, your processor hold time must not
exceed t
SD
minimum (20ns). As with CLK in mode 1,
maximum SCLK rates may not be possible with some
interface specifications that are subsets of SPI.
S upplies, Layout, Grounding
and Bypassing
For best system performance, use printed circuit
boards with separate analog and digital ground planes.
Wire-wrap boards are not recommended. The two
ground planes should be tied together at the low-
impedance power-supply source and at the MAX195
(Figure 22.) If the analog and digital supplies come
from the same source, isolate the digital supply from
the analog supply with a low-value resistor (10
).
Constraints on sequencing the four power supplies are
as follows.
Apply VDDA before VDDD.
Apply VSSA before VSSD.
Apply AIN and REF after VDDA and VSSA are present.
The power supplies should settle within the
MAX195’s power-on delay (minimum 500ns) or you
should recalibrate the converter (pulse
RESET
low)
before use.
16-Bit, 85ksps ADC with 10μA S hutdown
18
______________________________________________________________________________________
CS
CLK
START
588ns
239ns
CONVERSION TIME
9.4
μ
s
4.19MHz
1.3
μ
s
17
μ
s*
5.1
μ
s
4
μ
s
EOC
SCLK
DOUT
B15
B3 B2
B13
B14
B1
B0
* INTERRUPT LATENCY OF THE PROCESSOR
Figure 20. Timing Diagram for Circuit of Figure 19 (Mode 2)
相关PDF资料 |
PDF描述 |
|---|---|
| MAX195BEWE | 16-Bit, 85ksps ADC with 10レA Shutdown |
| MAX195BMDE | 16-Bit, 85ksps ADC with 10レA Shutdown |
| MAX196-MAX198 | Multirange, Single %V, 12-Bit DAS with 12-Bit Bus Interface |
| MAX196AMYI | Circular Connector; No. of Contacts:18; Series:MS27505; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:15-18 RoHS Compliant: No |
| MAX198AMYI | Circular Connector; No. of Contacts:18; Series:MS27505; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Socket; Circular Shell Style:Box Mount Receptacle RoHS Compliant: No |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX195BEPE+ | 功能描述:模数转换器 - ADC 16-Bit 85ksps 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 |
| MAX195BEPE+T | 制造商:Maxim Integrated Products 功能描述:16-BIT, 85KSPS ADC WITH 10?A SHUTDOWN - Tape and Reel |
| MAX195BEWE | 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 |
| MAX195BEWE+ | 功能描述:模数转换器 - ADC 16-Bit 85ksps 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 |
| MAX195BEWE+T | 功能描述:模数转换器 - ADC 16-Bit 85ksps 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 |
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