參數(shù)資料
型號： MAX117EAI
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： ADC
英文描述： +3V, 400ksps, 4/8-Channel, 8-Bit ADCs with 1UA Power-Down
中文描述： 8-CH 8-BIT FLASH METHOD ADC, PARALLEL ACCESS, PDSO28
封裝： 0.200 INCH, 0.65 MM PITCH, SSOP-28
文件頁數(shù)： 10/12頁
文件大?。?/td> 106K
代理商： MAX117EAI
M
Initial Power-Up
When power is first applied, perform a conversion to
initialize the MAX113/MAX117. Disregard the output
data.
Bypassing
Use a 4.7μF electrolytic in parallel with a 0.1μF ceramic
capacitor to bypass V
DD
to GND. Minimize capacitor
lead lengths.
Bypass the reference inputs with 0.1μF capacitors, as
shown in Figures 7a, 7b, and 7c.
Analog Inputs
Figure 8 shows the equivalent circuit of the MAX113/
MAX117 input. When a conversion starts and
WR
is
low, V
IN_
is connected to sixteen 0.6pF capacitors.
During this acquisition phase, the input capacitors
charge to the input voltage through the resistance of
the internal analog switches. In addition, about 22pF of
stray capacitance must be charged. The input can be
modeled as an equivalent RC network (Figure 9). As
source impedance increases, the capacitors take
longer to charge.
The typical 32pF input capacitance allows source resis-
tance as high as 1.5k
without setup problems. For
larger resistances, the acquisition time (t
ACQ
) must be
increased.
Internal protection diodes, which clamp the analog
input to V
DD
and GND, allow the channel input pins to
swing from GND - 0.3V to V
DD
+ 0.3V without damage.
However, for accurate conversions near full scale and
zero scale the inputs must not exceed V
DD
by more
than 50mV or be lower than GND by 50mV.
+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1μA Power-Down
10
______________________________________________________________________________________
R
ON
R
IN
V
IN2
MAX113
MAX117
.
.
.
T/H
MUX
2k
R
V
IN_
1
22pF
V
IN
MAX113
MAX117
10pF
Figure 8. Equivalent Input Circuit
Figure 9. RC Network Equivalent Input Model
REF-
MAX113
MAX117
V
DD
MAX872
REF+
+3V
0.1μF
C1
4.7μF
PWRDN
PWRDN
N-FET*
* IRML2402
0.1μF
Figure 7d. An N-channel MOSFET switches off the reference
load during power-down
OUTPUT CODE
INPUT VOLTAGE (LSBs)
FS
FS - 1LSB
FULL-SCALE
TRANSITION
1
2
3
11111111
11111110
11111101
00000011
00000010
00000001
00000000
V
REF-
1LSB =
V
REF+
- V
REF-
256
V
REF+
Figure 10. Transfer Function
相關PDF資料
PDF描述
MAX117MJI +3V, 400ksps, 4/8-Channel, 8-Bit ADCs with 1UA Power-Down
MAX1180 Dual 10-Bit, 105Msps, +3.3V, Low-Power ADC with Internal Reference and Parallel Outputs
MAX1180ECM Dual 10-Bit, 105Msps, +3.3V, Low-Power ADC with Internal Reference and Parallel Outputs
MAX1182 Dual 10-Bit, 65Msps, +3V, Low-Power ADC with Internal Reference and Parallel Outputs
MAX1183 Dual 10-Bit, 40Msps, +3V, Low-Power ADC with Internal Reference and Parallel Outputs
相關代理商/技術參數(shù)
參數(shù)描述
MAX117EAI+ 功能描述:模數(shù)轉換器 - ADC 8-Bit 4Ch 400ksps 3.6V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX117EAI+T 功能描述:模數(shù)轉換器 - ADC 8-Bit 4Ch 400ksps 3.6V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX117EAI-T 功能描述:模數(shù)轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX117EPI 功能描述:模數(shù)轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX117EPI+ 功能描述:模數(shù)轉換器 - ADC 8-Bit 4Ch 400ksps 3.6V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率: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。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*