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of the address byte (see the
Slave Address section).
The T/H circuitry enters hold mode two internal clock
cycles later. A conversion or series of conversions are
then internally clocked (eight clock cycles per conver-
sion) and the MAX1036–MAX1039 hold SCL low. When
operating in external clock mode, the T/H circuitry
enters track mode on the seventh falling edge of a valid
slave address byte. Hold mode is then entered on the
falling edge of the eighth clock cycle. The conversion is
performed during the next eight clock cycles.
The time required for the T/H circuitry to acquire an
input signal is a function of input capacitance. If the
analog input source impedance is high, the acquisition
time lengthens and more time must be allowed
between conversions. The acquisition time (tACQ) is the
minimum time needed for the signal to be acquired. It
is calculated by:
tACQ ≥ 6.25 (RSOURCE + RIN) CIN
where RSOURCE is the analog input source impedance,
RIN = 2.5kΩ, and CIN = 18pF. tACQ is 1/fSCL for external
clock mode. For internal clock mode, the acquisition
time is two internal clock cycles. To select RSOURCE,
allow 625ns for tACQ in internal clock mode to account
for clock frequency variations.
MAX1036–MAX1039
2.7V to 3.6V and 4.5V to 5.5V, Low-Power,
4-/12-Channel 2-Wire Serial 8-Bit ADCs
_______________________________________________________________________________________
9
tHD.STA
tSU.DAT
tHIGH
tR
tF
tHD.DAT
tHD.STA
S
Sr
A
SCL
SDA
tSU.STA
tLOW
tBUF
tSU.STO
PS
tHD.STA
tSU.DAT
tHIGH
tFCL
tHD.DAT
tHD.STA
S
Sr
A
SCL
SDA
tSU.STA
tLOW
tBUF
tSU.STO
S
tRCL
tRCL1
HS-MODE
F/S-MODE
A. F/S-MODE I2C SERIAL INTERFACE TIMING
B. HS-MODE I2C SERIAL INTERFACE TIMING
tFDA
tRDA
t
tR
tF
Figure 1. I2C Serial Interface Timing
VDD
IOL = 3mA
IOH = 0mA
VOUT
400pF
SDA
Figure 2. Load Circuit
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1036-MAX1039 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:2.7V to 5.5V, Low-Power, 4-/12-Channel 2-Wire Serial 8-Bit ADCs |
| MAX1036MEKA | 制造商:Maxim Integrated Products 功能描述:- Cut Tape Product 制造商:Rochester Electronics LLC 功能描述: |
| MAX1036MEKA+ | 制造商:Maxim Integrated Products 功能描述:ADC SGL SAR 188KSPS 8BIT SERL 8PIN SOT-23 - Cut Tape Product |
| MAX1036MEKA+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 |
| MAX1036MEKA-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 |
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