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ADC0808-N датащи(PDF) 3 Page - Texas Instruments

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номер детали ADC0808-N
подробное описание детали  ADC0808/ADC0809 8-Bit 關P Compatible A/D Converters with 8-Channel Multiplexer
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ADC0808-N, ADC0809-N
www.ti.com
SNAS535H – OCTOBER 1999 – REVISED MARCH 2013
Electrical Characteristics – Converter Specifications (continued)
Converter Specifications: VCC=5 VDC=VREF+, VREF(−)=GND, TMIN≤TA≤TMAX and fCLK=640 kHz unless otherwise stated.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
ADC0809
0°C to 70°C
±1
LSB
Total Unadjusted Error(1)
TMIN to TMAX
±1¼
LSB
Input Resistance
From Ref(+) to Ref(
−)
1.0
2.5
k
Ω
Analog Input Voltage Range
See (2) V(+) or V(
−)
GND
− 0.1
VCC + 0.1
VDC
VREF(+)
Voltage, Top of Ladder
Measured at Ref(+)
VCC
VCC + 0.1
V
Voltage, Center of Ladder
(VCC/2) − 0.1
VCC/2
(VCC/2) + 0.1
V
VREF(−)
Voltage, Bottom of Ladder
Measured at Ref(
−)
−0.1
0
V
IIN
Comparator Input Current
fc=640 kHz,
(3)
−2
±0.5
2
μA
(2)
Two on-chip diodes are tied to each analog input which will forward conduct for analog input voltages one diode drop below ground or
one diode drop greater than the VCCn supply. The spec allows 100 mV forward bias of either diode. This means that as long as the
analog VIN does not exceed the supply voltage by more than 100 mV, the output code will be correct. To achieve an absolute 0VDC to
5VDC input voltage range will therefore require a minimum supply voltage of 4.900 VDC over temperature variations, initial tolerance and
loading.
(3)
Comparator input current is a bias current into or out of the chopper stabilized comparator. The bias current varies directly with clock
frequency and has little temperature dependence (Figure 8). See ANALOG COMPARATOR INPUTS
Electrical Characteristics – Digital Levels and DC Specifications
Digital Levels and DC Specifications: ADC0808CCN, ADC0808CCV, ADC0809CCN and ADC0809CCV, 4.75
≤VCC≤5.25V,
−40°C≤TA≤+85°C unless otherwise noted
Symbol
Parameter
Conditions
Min
Typ
Max
Units
ANALOG MULTIPLEXER
VCC=5V, VIN=5V,
IOFF(+)
OFF Channel Leakage Current
TA=25°C
10
200
nA
TMIN to TMAX
1.0
μA
VCC=5V, VIN=0,
IOFF(−)
OFF Channel Leakage Current
TA=25°C
−200
−10
nA
TMIN to TMAX
−1.0
μA
CONTROL INPUTS
VIN(1)
Logical “1” Input Voltage
(VCC − 1.5)
V
VIN(0)
Logical “0” Input Voltage
1.5
V
Logical “1” Input Current (The Control
IIN(1)
VIN=15V
1.0
μA
Inputs)
Logical “0” Input Current (The Control
IIN(0)
VIN=0
−1.0
μA
Inputs)
ICC
Supply Current
fCLK=640 kHz
0.3
3.0
mA
DATA OUTPUTS AND EOC (INTERRUPT)
VCC = 4.75V
VOUT(1)
Logical “1” Output Voltage
IOUT = −360µA
2.4
V
IOUT = −10µA
4.5
V
VOUT(0)
Logical “0” Output Voltage
IO=1.6 mA
0.45
V
VOUT(0)
Logical “0” Output Voltage EOC
IO=1.2 mA
0.45
V
VO=5V
3
μA
IOUT
TRI-STATE Output Current
VO=0
−3
μA
Electrical Characteristics – Timing Specifications
Timing Specifications VCC=VREF(+)=5V, VREF(−)=GND, tr=tf=20 ns and TA=25°C unless otherwise noted.
Symbol
Parameter
Conditions
MIn
Typ
Max
Units
tSTCLK
Start Time Delay from Clock
(Figure 7)
300
900
ns
Copyright © 1999–2013, Texas Instruments Incorporated
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