- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9860 > MAX189BEWE+ (Maxim Integrated Products)IC ADC 12BIT SERIAL LP 16SOIC PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX189BEWE+ |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 4/18頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT SERIAL LP 16SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 46 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 75k |
| 數(shù)據(jù)接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 478mW |
| 電壓電源： | 單電源 |
| 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： | 管件 |
| 輸入數(shù)目和類型： | 1 個(gè)單端，單極 |
第1頁(yè)第2頁(yè)第3頁(yè)當(dāng)前第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)
MAX187/MAX189
+5V, Low-Power, 12-Bit Serial ADCs
12
Maxim Integrated
Minimum cycle time is accomplished by using DOUT’s
rising edge as the EOC signal. Clock out the data with
13 clock cycles at full speed. Raise CS after the conver-
sion’s LSB has been read. After the specified minimum
time, tACQ, CS can be pulled low again to initiate the next
conversion.
Output Coding and Transfer Function
The data output from the MAX187/MAX189 is binary, and
Figure 10 depicts the nominal transfer function. Code
transitions occur halfway between successive integer
LSB values. If VREF = +4.096V, then 1 LSB = 1.00mV or
4.096V/4096.
Dynamic Performance
High-speed sampling capability and a 75ksps throughput
make the MAX187/MAX189 ideal for wideband signal pro-
cessing. To support these and other related applications,
Fast Fourier Transform (FFT) test techniques are used
to guarantee the ADC’s dynamic frequency response,
distortion, and noise at the rated throughput. Specifically,
this involves applying a low-distortion sine wave to the
ADC input and recording the digital conversion results for
a specified time. The data is then analyzed using an FFT
algorithm that determines its spectral content. Conversion
errors are then seen as spectral elements outside of the
fundamental input frequency. ADCs have traditionally
been evaluated by specifications such as Zero and Full-
Scale Error, Integral Nonlinearity (INL), and Differential
Nonlinearity (DNL). Such parameters are widely accepted
for specifying performance with DC and slowly varying
signals, but are less useful in signal-processing applica-
tions, where the ADC’s impact on the system transfer
function is the main concern. The significance of various
DC errors does not translate well to the dynamic case, so
different tests are required.
Signal-to-Noise Ratio and
Effective Number of Bits
Signal-to-noise plus distortion (SINAD) is the ratio of the
fundamental input frequency’s RMS amplitude to the
RMS amplitude of all other ADC output signals. The input
bandwidth is limited to frequencies above DC and below
one-half the ADC sample (conversion) rate.
The theoretical minimum ADC noise is caused by quanti-
zation error and is a direct result of the ADC’s resolution:
SINAD = (6.02N + 1.76)dB, where N is the number of bits
of resolution. An ideal 12-bit ADC can, therefore, do no
better than 74dB. An FFT plot of the output shows the out-
put level in various spectral bands. Figure 11 shows the
result of sampling a pure 10kHz sine wave at a 75ksps
rate with the MAX187/MAX189.
Figure 10. MAX187/MAX189 UnipolarTransfer Function, 4.096V
= Full Scale
Figure 11. MAX187/MAX189 FFT plot
11...111
11...110
11...101
00...011
00...010
00...01
00...000
01
2FS
OUTPUT CODE
FS - 3/2 LSB
INPUT VOLTAGE (LSBs)
FS = +4.096V
1 LSB = FS
4096
FULL-SCALE
TRANSITION
3
AMPLITUDE
(dB)
20
0
-20
-40
-60
-80
-100
-120
-140
0
18.75
37.5
fS = 75ksps
fT = 10kHz
TA = +25°C
FREQUENCY (kHz)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MS3124F12-3S | CONN RCPT 3POS JAM NUT W/SCKT |
| MAX3032EESE+T | IC RS-422 TRANSMIT QUAD 16-SOIC |
| VE-JN4-MX-F4 | CONVERTER MOD DC/DC 48V 75W |
| VE-JN4-MX-F3 | CONVERTER MOD DC/DC 48V 75W |
| MAX1188BCUP+T | IC ADC 16BIT 135KSPS 20-TSSOP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX189BEWE+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 75ksps 5.25V Precision 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 |
| MAX189BEWE+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 75ksps 5.25V Precision 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 |
| MAX189BEWE-T | 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 |
| MAX189BMJA | 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 |
| MAX189CCPA | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Integrated Circuits (ICs) 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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。