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参数资料
| 型号： | MAX195ACDE |
| 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, CDIP16 |
| 封装： | 0.300 INCH, SIDEBRAZED, CERAMIC, DIP-16 |
| 文件页数： | 7/28页 |
| 文件大小： | 311K |
| 代理商： | MAX195ACDE |
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If the power supplies do not settle within the MAX195’s
power-on delay (500ns minimum), power-up calibration
may begin with supply voltages that differ from the final
values and the converter may not be properly calibrat-
ed. If so, recalibrate the converter (pulse
RESET
low)
before use. For best DC accuracy, calibrate the
MAX195 any time there is a significant change in sup-
ply voltages, temperature, reference voltage, or clock
characteristics (see External Clock section) because
these parameters affect the DC offset. If linearity is the
only concern, much larger changes in these parame-
ters can be tolerated.
Because the calibration data is stored digitally, there is
no need either to perform frequent conversions to main-
tain accuracy or to recalibrate if the MAX195 has been
held in shutdown for long periods. However, recalibra-
tion is recommended if it is likely that ambient tempera-
ture or supply voltages have significantly changed
since the previous calibration.
Digital Interfac e
The digital interface pins consist of BP/UP/
SHDN
, CLK,
SCLK,
EOC
,
CS
,
CONV
, and
RESET
.
BP/UP/
SHDN
is a three-level input. Leave it floating to
configure the MAX195’s analog input in bipolar mode
(AIN = -V
REF
to V
REF
) or connect it high for a unipolar
input (AIN = 0V to V
REF
). Bringing BP/UP/
SHDN
low
places the MAX195 in its 10μA shutdown mode.
A logic low on
RESET
halts MAX195 operation. The ris-
ing edge of
RESET
initiates calibration as described in
the Calibrationsection above.
Begin a conversion by bringing
CONV
low. After con-
version begins, additional convert start pulses are
ignored. The convert signal must be synchronized with
CLK. The falling edge of
CONV
must occur during the
period shown in Figures 3 and 4. When CLK is not
directly controlled by your processor, two methods of
ensuring synchronization are to drive
CONV
from
EOC
(continuous conversions) or to gate the conversion-start
signal with the conversion clock so that
CONV
can go
low only while CLK is low (Figure 5). Ensure that the
maximum propagation delay through the gate is less
than 40ns.
The MAX195 automatically ensures four CLK periods
for track/hold acquisition. If, when
CONV
is asserted, at
least three clock (CLK) cycles have passed since the
end of the previous conversion, a conversion will begin
on CLK’s next falling edge and
EOC
will go high on the
following falling CLK edge (Figure 3). If, when convert
is asserted, less than three clock cycles have passed,
a conversion will begin on the fourth falling clock edge
M
16-Bit, 85ksps ADC with 10μA S hutdown
_______________________________________________________________________________________
7
TRACK/HOLD
CLK
CONVERSION
BEGINS
CONVERSION
ENDS
t
AQ
*
*
THE FALLING EDGE OF CONV MUST OCCUR IN THIS REGION
t
CEL
t
CW
t
CEH
t
CC2
t
CC1
EOC
CONV
Figure 3. Initiating Conversions—At least 3 CLK cycles since end of previous conversion.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX195ACWE | 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 |
| MAX195ACWE+ | 功能描述:模数转换器 - ADC 16-Bit 85ksps ADC with 10uA Shutdown 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 |
| MAX195ACWE+T | 功能描述:模数转换器 - ADC 16-Bit 85ksps ADC with 10uA Shutdown 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 |
| MAX195ACWE-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 |
| MAX195AEDE | 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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