The VREF+ and V
參數(shù)資料
型號: MX7828LP+T
廠商: Maxim Integrated Products
文件頁數(shù): 11/12頁
文件大?。?/td> 0K
描述: IC ADC 8BIT HS 28-PLCC
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 500
位數(shù): 8
采樣率(每秒): 400k
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 3
功率耗散(最大): 75mW
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-LCC(J 形引線)
供應(yīng)商設(shè)備封裝: 28-PLCC(11.51x11.51)
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 8 個單端,單極
MX7824/MX7828
_____________Analog Considerations
Reference and Input
The VREF+ and VREF- inputs of the converter define the
zero and the full-scale of the ADC. In other words, the
voltage at VREF- is equal to the input voltage that pro-
duces an output code of all zeros, and the voltage at
VREF+ is equal to input voltage that produces an output
code of all ones (Figure 7).
Figure 8 shows some possible reference configura-
tions. For the MAX154/MAX158, a 0.01F bypass
capacitor to GND should be used to reduce the high-
frequency output impedance of the internal reference.
Larger capacitors should not be used, as this degrades
the stability of the reference buffer. The 2.5V reference
output is with respect to the GND pin.
Bypassing
A 47F electrolytic and 0.1F ceramic capacitor should
be used to bypass the VDD pin to GND. These capaci-
tors must have minimum lead length, since excess lead
length may contribute to conversion errors and instability.
If the reference inputs are driven by long lines, they
should be bypassed to GND with 0.1F capacitors at
the reference input pins.
CMOS, High-Speed, 8-Bit ADCs
with Multiplexer
8
_______________________________________________________________________________________
DATA
NEW
DATA
ADDR
VALID
INT
RDY
RD
ANALOG
CHANNEL
ADDRESS
CS
tAS
tAH
tRDY
tACCI
tCRD
tRD
tCSS
tRD
tRDY
tINTH
tDH
tAH
tINTH
tAS
tP
tCSS
tCSH
ADDR
VALID
OLD
DATA
tDH
tCSH
tACCI
Figure 6. Mode 1 Timing Diagram
11111111
11111110
11111101
00000011
00000010
00000001
00000000
1
VREF-
23
FS
VREF+
FS–1LSB
OUTPUT
CODE
FULL-SCALE
TRANSITION
1LSB = F8 = VREF+ - VREF-
256
AIN INPUT VOLTAGE
(IN TERMS OF LSBs)
Figure 7. Transfer Function
相關(guān)PDF資料
PDF描述
MAX3345EEBE+T TXRX USB ESD DETECT 16-UCSP
MAX3346EEBE+T IC USB TXRX ESD PROTECT 16-UCSP
MS27467E15B35PA CONN PLUG 37POS STRAIGHT W/PINS
MAX3190EEUT+T IC RS-232 TRANSMITTER SOT23-6
MS3102R14S-2SY CONN RCPT 4POS BOX MNT W/SCKT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MX7828TQ 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
MX7828TQ/883 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single-Ended Data Acquisition System
MX7828TQ/883B 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8-Bit 8Ch Precision 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
MX7828TQ883B 制造商:MAXIM 功能描述:New
MX7828UQ 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