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參數(shù)資料
型號(hào): AD7877ACPZ-REEL7
廠商: Analog Devices Inc
文件頁(yè)數(shù): 34/45頁(yè)
文件大小: 0K
描述: IC ADC 12BIT TOUCHSCREEN 32LFCSP
標(biāo)準(zhǔn)包裝: 1,500
類(lèi)型: 電阻
觸摸面板接口: 4 線
輸入數(shù)/鍵: 1 TSC
分辨率(位): 12 b
評(píng)估套件: 可供
數(shù)據(jù)接口: 串行,SPI?
數(shù)據(jù)速率/采樣率 (SPS,BPS): 125k
電壓基準(zhǔn): 外部,內(nèi)部
電源電壓: 2.7 V ~ 5.25 V
電流 - 電源: 1µA
工作溫度: -40°C ~ 85°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤(pán),CSP
供應(yīng)商設(shè)備封裝: 32-LFCSP-VQ
包裝: 帶卷 (TR)
配用: EVAL-AD7877EBZ-ND - BOARD EVALUATION FOR AD7877
Data Sheet
AD7877
Rev. D | Page 3 of 44
SPECIFICATIONS
VCC = 2.7 V to 3.6 V, VREF = 2.5 V internal or external, fDCLK = 2 MHz, TA = 40°C to +85°C, unless otherwise noted.
Table 1.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
DC ACCURACY
Resolution
12
Bits
No Missing Codes
11
12
Bits
Integral Nonlinearity (INL)1
±2
LSB
LSB size = 610 V
Differential Nonlinearity (DNL)1
Minimum LSB size = 610 V
Negative DNL
0.99
LSB
Positive DNL
+2
LSB
Offset Error1
±5
LSB
Specified for 11bits
Gain Error1
±3
LSB
Specified for 11 bits; external reference
Noise
70
V rms
Power Supply Rejection
70
dB
Internal Clock Frequency
2
MHz
SWITCH DRIVERS
On Resistance1
Y+, X+
14
Y, X
14
ANALOG INPUTS
Input Voltage Ranges
0
VREF
V
DC Leakage Current
±0.1
A
Input Capacitance
30
pF
Accuracy
0.3
%
All channels, internal VREF
REFERENCE INPUT/OUTPUT
Internal Reference Voltage
2.44
2.55
V
Internal Reference Tempco
±50
ppm/°C
VREF Input Voltage Range
1
VCC
V
DC Leakage Current
±1
A
VREF Input Impedance
1
G
CS = GND or VCC; typically 25 when the on-board
reference is enabled
TEMPERATURE MEASUREMENT
Temperature Range
40
+85
°C
Resolution
Differential Method2
1.6
°C
Single Conversion Method3
0.3
°C
Accuracy
Differential Method2
±4
°C
0°C to 70°C
Single Conversion Method3
±2
°C
Calibrated at 25°C
BATTERY MONITOR
Input Voltage Range
0.5
5
V
@ VREF = 2.5 V
Input Impedance
14
k
Sampling, 1 G when the battery monitor is off
Accuracy
1
3.2
%
External/internal reference, see Figure 26
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