參數(shù)資料
型號(hào)： MAX1117EKA+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 13/14頁(yè)
文件大?。?/td> 0K
描述： IC ADC 8BIT SERIAL SOT23-8
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1
位數(shù)： 8
采樣率（每秒）： 100k
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）： 410µW
電壓電源： 單電源
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： SOT-23-8
供應(yīng)商設(shè)備封裝： SOT-23-8
包裝： 標(biāo)準(zhǔn)包裝
輸入數(shù)目和類(lèi)型： 2 個(gè)單端，單極
產(chǎn)品目錄頁(yè)面： 1395 (CN2011-ZH PDF)
其它名稱(chēng)： MAX1117EKA+TDKR
MAX1117/MAX1118/MAX1119
Single-Supply, Low-Power,
2-Channel, Serial 8-Bit ADCs
8
_______________________________________________________________________________________
VDD
I/O
SCK (SK)
MISO (SI)
GND
DOUT
SCLK
CNVST
GND
VDD
0.1
μF
1
μF
CH0
REF*
* MAX1118 ONLY
1
μF
ANALOG
INPUTS
MAX1117
MAX1118
MAX1119
CPU
VDD
CH1
Figure 3. Typical Operating Circuit
GND
CHOLD
CAPACITIVE DAC
COMPARATOR
16pF
RIN
6.5k
Ω
AUTOZERO
RAIL
TRACK
HOLD
CH0
CH1
Figure 4. Equivalent Input Circuit
Detailed Description
The MAX1117/MAX1118/MAX1119 ADCs use a suc-
cessive-approximation conversion technique and input
T/H circuitry to convert an analog signal to an 8-bit digi-
tal output. The SPI/QSPI/MICROWIRE compatible inter-
face directly connects to microprocessors (Ps) without
additional circuity (Figure 3).
Track/Hold
The input architecture of the ADC is illustrated in Figure
4’s equivalent-input circuit and is composed of the T/H,
the input multiplexer, the input comparator, the
switched capacitor DAC, and the auto-zero rail.
The acquisition interval begins with the falling edge of
CNVST. During the acquisition interval, the analog
inputs (CH0, CH1) are connected to the holding capac-
itor (CHOLD). Once the acquisition has completed, the
T/H switch opens and CHOLD is connected to GND,
retaining the charge on CHOLD as a sample of the sig-
nal at the analog input.
Sufficiently low source impedance is required to ensure
an accurate sample. A source impedance <1.5k
Ω is
recommended for accurate sample settling. A 100pF
capacitor at the ADC inputs will also improve the accu-
racy of an input sample.
Conversion Process
The MAX1117/MAX1118/MAX1119 conversion process
is internally timed. The total acquisition and conversion
process takes <7.5s. Once an input sample has been
acquired, the comparator’s negative input is then con-
VDD
3k
Ω
CLOAD
GND
DOUT
CLOAD
GND
3k
Ω
DOUT
a) VOL TO VOH
b) HIGH-Z to VOL AND VOH to VOL
VDD
3k
Ω
CLOAD
GND
DOUT
CLOAD
GND
3k
Ω
DOUT
a) VOH TO HIGH-Z
b) VOL TO HIGH-Z
Figure 1. Load Circuits for Enable Time
Figure 2. Load Circuits for Disable Time
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1117EKA-TW 制造商:Maxim Integrated Products 功能描述:+2.7V TO +3.6V, SINGLE-SUPPLY, LOW-POWER, 2-C - Tape and Reel
MAX1117EVKIT 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開(kāi)發(fā)工具 Single-Supply Low-Power 2-Channel Serial 8-Bit ADCs RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類(lèi)型:ADC 工具用于評(píng)估:ADS130E08 接口類(lèi)型:SPI 工作電源電壓:- 6 V to + 6 V
MAX1117EVL11 功能描述:模數(shù)轉(zhuǎn)換器 - ADC MAX1117L11 EVAL KIT 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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
MAX1117EVSYS 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:Evaluation System for the MAX1115/MAX1116/MAX1117/MAX1118/MAX1119
MAX1118 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs
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