參數(shù)資料
型號(hào): MAX11111ATB+T
廠商: Maxim Integrated Products
文件頁數(shù): 19/30頁
文件大?。?/td> 0K
描述: IC ADC 8BIT 3MSPS 2CH 10TDFN-EP
其它有關(guān)文件: Automotive Product Guide
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): 3M
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): 1.95W
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 10-WFDFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 10-TDFN-EP(3x3)
包裝: 標(biāo)準(zhǔn)包裝
輸入數(shù)目和類型: *
其它名稱: MAX11111ATB+TDKR
26
Maxim Integrated
2Msps/3Msps, Low-Power,
Serial 12-/10-/8-Bit ADCs
MAX11102/03/05/06/10/11/15/16/17
Figure 15. Channel Select Timing Diagram
Dual-Channel Operation
The MAX11102/MAX11103/MAX11106/MAX11111 fea-
ture dual-input channels. These devices use a channel-
select (CHSEL) input to select between analog input AIN1
(CHSEL = 0) or AIN2 (CHSEL = 1). As shown in Figure
15, the CHSEL signal is required to change between the
2nd and 12th clock cycle within a regular conversion to
guarantee proper switching between channels.
14-Cycle Conversion Mode
The ICs can operate with 14 cycles per conversion.
Figure 16 shows the corresponding timing diagram.
Observe that DOUT does not go into high-impedance
mode. Also, observe that tACQ needs to be sufficiently
long to guarantee proper settling of the analog input
voltage. See the Electrical Characteristics table for tACQ
requirements and the Analog Input section for a descrip-
tion of the analog inputs.
Applications Information
Layout, Grounding, and Bypassing
For best performance, use PCBs with a solid ground
plane. Ensure that digital and analog signal lines are
separated from each other. Do not run analog and digital
(especially clock) lines parallel to one another or digital
lines underneath the ADC package. Noise in the VDD
power supply, OVDD, and REF affects the ADC’s perfor-
mance. Bypass the VDD, OVDD, and REF to ground with
0.1FF and 10FF bypass capacitors. Minimize capacitor
lead and trace lengths for best supply-noise rejection.
Choosing an Input Amplifier
It is important to match the settling time of the input
amplifier to the acquisition time of the ADC. The conver-
sion results are accurate when the ADC samples the
input signal for an interval longer than the input signal’s
worst-case settling time. By definition, settling time is
the interval between the application of an input voltage
step and the point at which the output signal reaches
Figure 16. 14-Clock Cycle Operation
1
DATA CHANNEL AIN1
DATA CHANNEL AIN2
SCLK
CHSEL
DOUT
CS
23456
78
910111213141516
123456
78
910111213141516
1
DOUT
SCLK
(MSB)
SAMPLE
1/fSAMPLE
tACQ
tCONVERT
CS
23
4
D10
D11
56
78
910111213141
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
00
0
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