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參數(shù)資料
| 型號： | MAX117CAI+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 2/12頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 8BIT 400KSPS 28-SSOP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 46 |
| 位數(shù)： | 8 |
| 采樣率（每秒）： | 400k |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉換器數(shù)目： | 3 |
| 功率耗散（最大）： | 762mW |
| 電壓電源： | 單電源 |
| 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） |
| 供應商設備封裝： | 28-SSOP |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 7 個單端，單極；7 個單端，雙極 |
MAX113/MAX117
Initial Power-Up
When power is first applied, perform a conversion to
initialize the MAX113/MAX117. Disregard the output
data.
Bypassing
Use a 4.7F electrolytic in parallel with a 0.1F ceramic
capacitor to bypass VDD to GND. Minimize capacitor
lead lengths.
Bypass the reference inputs with 0.1F 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, VIN_ 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 (tACQ) must be
increased.
Internal protection diodes, which clamp the analog
input to VDD and GND, allow the channel input pins to
swing from GND - 0.3V to VDD + 0.3V without damage.
However, for accurate conversions near full scale and
zero scale the inputs must not exceed VDD by more
than 50mV or be lower than GND by 50mV.
+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1A Power-Down
10
______________________________________________________________________________________
RON
RIN
VIN2
MAX113
MAX117
.
T/H
MUX
2k
R
VIN_
1
22pF
VIN
MAX113
MAX117
10pF
Figure 8. Equivalent Input Circuit
Figure 9. RC Network Equivalent Input Model
REF-
MAX113
MAX117
VDD
MAX872
REF+
+3V
0.1F
C1
4.7F
PWRDN
N-FET*
* IRML2402
0.1F
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
12
3
11111111
11111110
11111101
00000011
00000010
00000001
00000000
1LSB =
VREF+ - VREF-
256
VREF-
VREF+
Figure 10. Transfer Function
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX117CAI+ | 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 |
| MAX117CAI+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 |
| MAX117CAI-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 |
| MAX117CPI | 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 |
| MAX117CPI+ | 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 |
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