參數(shù)資料
型號(hào)： MAX195BEWE+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 8/28頁(yè)
文件大?。?/td> 0K
描述： IC ADC 16BIT 85KSPS 16-SOIC
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1,000
位數(shù)： 16
采樣率（每秒）： 85k
數(shù)據(jù)接口： QSPI?，串行，SPI?
轉(zhuǎn)換器數(shù)目： 2
功率耗散（最大）： 80mW
電壓電源： 模擬和數(shù)字，雙 ±
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 16-SOIC（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 16-SOIC W
包裝： 帶卷 (TR)
輸入數(shù)目和類型： 1 個(gè)單端，單極；1 個(gè)單端，雙極
MAX195
If ±15V supplies are unavailable, Figure 16’s circuit
works very well with the ±5V analog supplies used by
the MAX195. The MAX410 has a minimum ±3.5V com-
mon-mode input range, with a similar output voltage
swing, which allows use of a reference voltage up to
3.5V. The offset voltage (250V) is about 2LSB. The
drift (1V/°C), unity-gain bandwidth (28MHz), and low
voltage noise (2.4nV/
√Hz) are appropriate for 16-bit
performance.
Operating Modes and SPI/QSPI Interfaces
The two basic interface modes are defined according
to whether serial data is received during the conversion
(clocked with CLK, SCLK unused) or in bursts between
conversions (clocked with SCLK). Each mode is pre-
sented interfaced to a QSPI processor, but is also com-
patible with SPI.
Mode 1 (Simultaneous
Conversion and Data Transfer)
In this mode, each data bit is read from the MAX195
during the conversion as it is determined. SCLK is
grounded and CLK is used as both the conversion
clock and the serial data clock. Figure 17 shows a
QSPI processor connected to the MAX195 for use in
this mode and Figure 18 is the associated timing dia-
gram.
In addition to the standard QSPI interface signals, gen-
eral I/O lines are used to monitor EOC and to drive
BP/UP/SHDN and RESET. The two general output pins
may not be necessary for a given application and, if I/O
lines are unavailable, the EOC connection can be omit-
ted as well.
The EOC signal is monitored during calibration to
determine when calibration is finished and before
beginning a conversion to ensure the MAX195 is not in
mid-conversion, but it is possible for a system to ignore
EOC completely. On power-up or after pulsing RESET
low, the P must provide 14,000 CLK cycles to com-
plete the calibration sequence (Figure 2). One way to
do this is to toggle CLK and monitor EOC until it goes
low, but it is possible to simply count 14,000 CLK
cycles to complete the calibration. Similarly, it is
unnecessary to check the status of EOC before begin-
ning a conversion if you are sure the last conversion is
complete. This can be done by ensuring that every
conversion consists of at least 20 CLK cycles.
Data is clocked out of the MAX195 on CLK’s falling
edge and can be clocked into the P on the rising
edge or the following falling edge. If you clock data in
on the rising edge (SPI/QSPI with CPOL = 0 and CPHA
= 0; standard MicroWire: Hitachi H8), the maximum
CLK rate is given by:
where tCD is the MAX195’s CLK-to-DOUT valid delay
and tSD is the data setup time for your P.
f
=
/
1
t
+ t
CLK(max)
1
2
CD
SD
16-Bit, 85ksps ADC with 10A Shutdown
16
______________________________________________________________________________________
MAX195
QSPI
GPT
BP/UP/SHDN
CLK
SCLK
EOC
DOUT
RESET
CONV
CS
*OC3
SCK
*IC1
MISO
*OC2
* THE USE OF THESE SIGNALS ADDS FLEXIBILITY AND FUNCTIONALITY
BUT IS NOT REQUIRED TO IMPLEMENT THE INTERFACE.
PCS0
Figure 17. MAX195 Connection to QSPI Processor Clocking
Data Out During Conversions
MAX410
4
7
6
2
3
IN
+5V
-5V
0.1
F
0.01
F
22
510
0.1
F
AIN
Figure 16. ±5V Buffer for AC/DC Use Has ±3.5V Swing
MicroWire is a trademark of National Semiconductor Corp.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX195BMDE 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX195EVC16-DIP 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Programmers, Development Systems RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX195EVKIT-DIP 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 Programmers, Development Systems RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評(píng)估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
MAX1960EEP 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1960EEP+ 功能描述:DC/DC 開關(guān)控制器 1MHz PWM Step-Down RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
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