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ADC0803 Datasheet(数据表) 3 Page - Texas Instruments

部件型号  ADC0803
说明  8-BIT ANALOG-TO-DIGITAL CONVERTERS WITH DIFFERENTIAL INPUTS
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
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ADC0803, ADC0805
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH DIFFERENTIAL INPUTS
SLAS034 – NOVEMBER 1983 – REVISED SEPTEMBER 1986
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC (see Note 1)
6.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range: CS, RD, WR
– 0.3 V to 18 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other inputs
– 0.3 V to VCC 0.3 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range
– 0.3 V to VCC 0.3 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range: ADC080_C
0
°C to 70°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADC080_I
– 40
°C to 85°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range
– 65
°C to 150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
260
°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NOTE 1: All voltage values are with respect to digital ground (DGTL GND) with DGTL GND and ANLG GND connected together unless otherwise
noted.
recommended operating conditions
MIN
NOM
MAX
UNIT
Supply voltage, VCC
4.5
5
6.3
V
Analog input voltage (see Note 2)
– 0.05
VCC = 0.05
V
Voltage at REF/2 (see Note 3), VREF/2
0.25
2.5
V
High-level input voltage at CS, RD, or WR, VIH
2
15
V
Low-level input voltage at CS, RD, or WR, VIL
0.8
V
Analog ground voltage (see Note 4)
– 0.05
0
1
V
Clock iput frequency (see Note 5), fclock
100
640
1460
kHz
Duty cycle for fclock above 640 kHz (see Note 5)
40%
60%
Pulse durartion, clock input (high or low) for fclock below 640 kHz, tW(CLK)
275
781
ns
Pulse durartion, WR input low, tW(WR)
100
ns
Operating free air temperature TA
ADC080_C
0
70
°C
Operating free–air temperature, TA
ADC080_I
–40
85
°C
NOTES:
2. When the differential input voltage (VI+ – VI–) is less than or equal to 0 V, the output code is 0000 0000.
3. The internal reference voltage is equal to the voltage applied to REF/2 or approximately equal to one-half of the VCC when REF/2
is left open. The voltage at REF/2 should be one-half the full-scale differential input voltage between the analog inputs. Thus, the
differential input voltage range when REF/2 is open and VCC = 5 V is 0 V to 5 V. VREF/2 for an input voltage range from 0.5 V to 3.5 V
(full-scale differential voltage of 3 V) is 1.5 V.
4. These values are with respect to DGTL GND.
5. Total unadjusted error is specified only at an fclock of 640 kHz with a duty cycle of 40% to 60% (pulse duration 625 ns to 937 ns).
For frequencies above this limit or pulse duration below 625 ns, error may increase. The duty cycle limits should be observed for
an fclock greater than 640 kHz. Below 640 kHz, this duty cycle limit can be exceeded provided tw(CLK) remains within limits.




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