- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄2008 > MAX1401CAI+ (Maxim Integrated Products)IC ADC 18BIT LP 28-SSOP PDF資料下載
參數(shù)資料
| 型號： | MAX1401CAI+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 16/36頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 18BIT LP 28-SSOP |
| 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)： | 18 |
| 采樣率（每秒）： | 480 |
| 數(shù)據(jù)接口： | QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 750µW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SSOP（0.209"，5.30mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-SSOP |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 3 個差分，單極；3 個差分，雙極；5 個偽差分，單極；5 個偽差分，雙極 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當(dāng)前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁
MAX1401
+3V, 18-Bit, Low-Power, Multichannel,
Oversampling (Sigma-Delta) ADC
______________________________________________________________________________________
23
External Access to Mux Outputs
The MAX1401 provides access to the switching-net-
work output and the modulator input with the MUXOUT
and ADCIN pins. This allows the user to share a single
high-performance amplifier for additional signal condi-
tioning of all input channels.
Dynamic Input Impedance at the
Channel Selection Network
When used in unbuffered mode (BUFF = 0), the analog
inputs present a dynamic load to the driving circuitry.
The size of the sampling capacitor and the input sam-
pling frequency (Figure 5) determine the dynamic load
seen by the driving circuitry. The MAX1401 samples at a
constant rate for all gain settings. This provides a maxi-
mum time for the input to settle at a given data rate. The
dynamic load presented by the inputs varies with the
gain setting. For gains of +2V/V, +4V/V, and +8V/V, the
input sampling capacitor increases with the chosen
gain. Gains of +16V/V, +32V/V, +64V/V, and +128V/V
present the same input load as the x8 gain setting.
When designing with the MAX1401, as with any other
switched-capacitor ADC input, consider the advan-
tages and disadvantages of series input resistance. A
series resistor reduces the transient-current impulse to
the external driving amplifier. This improves the amplifi-
er phase margin and reduces the possibility of ringing.
The resistor spreads the transient-load current from the
sampler over time due to the RC time constant of the
circuit. However, an improperly chosen series resis-
tance can hinder performance in fast 16-bit converters.
The settling time of the RC network can limit the speed
at which the converter can operate properly, or reduce
the settling accuracy of the sampler. In practice, this
means ensuring that the RC time constant—resulting
from the product of the driving source impedance and
the capacitance presented by both the MAX1401’s
input and any external capacitances—is sufficiently
small to allow settling to the desired accuracy. Tables
13a–13d summarize the maximum allowable series
resistance vs. external capacitance for each MAX1401
gain setting in order to ensure 16-bit performance in
unbuffered mode.
REXT
CEXT
RMUX
CPIN
MUXOUT
ADCIN RSW
CST
CPIN
CSAMPLE
CC
Figure 5. Analog Input, Unbuffered Mode (BUFF = 0)
Table 13a. REXT, CEXT Values for Less than 16-Bit Gain Error in Unbuffered (BUFF = 0)
Mode; 1x Modulator Sampling Frequency (MF1, MF0 = 00); X2CLK = 0; fCLKIN = 2.4576MHz
Table 13b. REXT, CEXT Values for Less than 16-Bit Gain Error in Unbuffered (BUFF = 0)
Mode; 2x Modulator Sampling Frequency (MF1, MF0 = 00); X2CLK = 0; fCLKIN = 2.4576MHz
29
14
29
14
9.4
2
22
12
15
9.6
7.0
8, 16, 32,
64, 128
8.4
9.4
4
1
CEXT = 0pF
CEXT = 50pF
CEXT = 100pF
2.9
1.6
2.9
1.6
0.43
2.7
1.5
2.4
1.4
0.37
0.40
PGA GAIN
0.43
CEXT = 500pF
CEXT = 1000pF
CEXT = 5000pF
EXTERNAL RESISTANCE, REXT (k
)
14
6.9
14
6.9
4.7
2
11
6.0
7.7
4.8
3.5
8, 16, 32,
64, 128
4.2
4.7
4
1
CEXT = 0pF
CEXT = 50pF
CEXT = 100pF
1.4
0.81
1.4
0.81
0.22
1.3
0.76
1.2
0.70
0.18
0.20
PGA GAIN
0.22
CEXT = 500pF
CEXT = 1000pF
CEXT = 5000pF
EXTERNAL RESISTANCE, REXT (k
)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1415AEWE+T | IC ADC 16BIT DELTA SIGMA 16-SOIC |
| MAX1421CCM+D | IC ADC 12BIT 40MSPS 48LQFP |
| MAX1426EAI+T | IC ADC 10BITS 10MSPS 28SSOP |
| MAX1434ECQ+D | IC ADC 10BIT 50MSPS 100-TQFP |
| MAX1444EHJ+T | IC ADC 10BIT 40MSPS 32-TQFP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1401CAI+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 5Ch 4.8ksps 1.25V 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 |
| MAX1401CAI+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 5Ch 4.8ksps 1.25V 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 |
| MAX1401CAI-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 |
| MAX1401EAI | 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 |
| MAX1401EAI+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 5Ch 4.8ksps 1.25V 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。