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ADC78H89CIMT bảng dữ liệu(PDF) 5 Page - Texas Instruments

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ADC78H89
www.ti.com
SNAS201D – APRIL 2003 – REVISED MARCH 2013
ADC78H89 CONVERTER ELECTRICAL CHARACTERISTICS
(1) (continued)
The following specifications apply for AVDD = DVDD = +2.7V to 5.25V, fSCLK = 8 MHz, fSAMPLE = 500 KSPS unless otherwise
noted. Boldface limits apply for TA = TMIN to TMAX: all other limits TA = 25°C.
Symbol
Parameter
Conditions
Typical
Limits
Units (2)
POWER SUPPLY CHARACTERISTICS (CL = 10 pF)
(3)
2.7
V (min)
AVDD,
Analog and Digital Supply Voltages
AVDD ≥ DVDD
DVDD
5.25
V (max)
AVDD = DVDD = +4.75V to +5.25V,
1.65
2.3
mA (max)
fSAMPLE = 500 KSPS, fIN = 40 kHz
Total Supply Current, Normal Mode
(Operational, CS low)
AVDD = DVDD = +2.7V to +3.6V,
0.5
2.3
mA (max)
fSAMPLE = 500 KSPS, fIN = 40 kHz
IDD
AVDD = DVDD = +4.75V to +5.25V,
0.1
µA
fSAMPLE = 0 KSPS
Total Supply Current, Shutdown (CS
high)
AVDD = DVDD = +2.7V to +3.6V,
0.1
µA
fSAMPLE = 0 KSPS
AVDD = DVDD = +4.75V to +5.25V
8.3
12
mW (max)
Power Consumption, Normal Mode
(Operational, CS low)
AVDD = DVDD = +2.7V to +3.6V
1.5
8.3
mW (max)
PD
AVDD = DVDD = +4.75V to +5.25V
0.5
µW
Power Consumption, Shutdown (CS
high)
AVDD = DVDD = +2.7V to +3.6V
0.3
µW
AC ELECTRICAL CHARACTERISTICS
fSCLK
Maximum Clock Frequency
8
MHz (max)
Minimum Clock Frequency
50
kHz
fS
Maximum Sample Rate
500
KSPS (min)
tCONV
Conversion Time
13
13
SCLK cycles
40
% (min)
DC
Duty Cycle
50
60
% (max)
tACQ
Track/Hold Acquisition Time
Full-Scale Step Input
3
SCLK cycles
Throughput Time
Conversion Time + Acquisition Time
16
SCLK cycles
fRATE
Throughput Rate
500
KSPS (min)
tAD
Aperture Delay
4
ns
(3)
Except power supply pins.
ADC78H89 TIMING SPECIFICATIONS
The following specifications apply for AVDD = DVDD = +2.7V to 5.25V, fSCLK = 8 MHz, CL = 50 pF, Boldface limits apply for
TA = TMIN to TMAX: all other limits TA = 25°C.
Symbol
Parameter
Conditions
Typical
Limits
Units
t1a
SCLK High to CS Fall Setup Time
See (1)
10
ns (min)
t1b
SCLK Low to CS Fall Hold Time
See (1)
10
ns (min)
t2
Delay from CS Until DOUT TRI-STATE™ Disabled
30
ns (max)
t3
Data Access Time after SCLK Falling Edge
30
ns (max)
t4
Data Setup Time Prior to SCLK Rising Edge
10
ns (max)
t5
Data Valid SCLK Hold Time
10
ns (max)
t6
SCLK High Pulse Width
0.4 x tSCLK
ns (min)
t7
SCLK Low Pulse Width
0.4 x tSCLK
ns (min)
t8
CS Rising Edge to DOUT High-Impedance
20
ns (max)
(1)
Clock may be in any state (high or low) when CS is asserted, with the restrictions on setup and hold time given by t1a and t1b.
Copyright © 2003–2013, Texas Instruments Incorporated
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