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| 型號： | ADC0831B |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | A/D Peripherals with Serial Control |
| 中文描述： | 具有串行控制的 A/D 外設(shè) |
| 文件頁數(shù)： | 5/9頁 |
| 文件大?。?/td> | 151K |
| 代理商： | ADC0831B |
ADC0831A, ADC0832A, ADC0831B, ADC0832B
A/D PERIPHERALS WITH SERIAL CONTROL
SLAS006 – AUGUST 1985 – REVISED JUNE 1986
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
electrical
characteristics
over
recommended
range
of
operating
free-air
temperature,
VCC = 5 V, fclock = 250 kHz (unless otherwise noted)
analog and converter section
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VICR
Common-mode input voltage range
See Note 3
– 0.05
to
VCC+ 0.05
V
On-channel
VI = 5 V
1
II( tdb )
Standby input current (see Note 4)
Off-channel
VI = 0
–1
A
II(stdby)
Standby input current (see Note 4)
On-channel
VI = 0
–1
A
Off-channel
VI = 5 V
1
ri(REF)
Input resistance to reference ladder
1.3
2.4
5.9
k
total device
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ICC
Supply current
ADC0831
1
2.5
mA
ICC
Supply current
ADC0832
3
5.2
mA
All parameters are measured under open-loop conditions with zero common-mode input voltage.
All typical values are at VCC = 5 V, TA = 25°C.
NOTES:
3. If channel IN– is more positive than channel IN+, the digital output code will be 0000 0000. Connected to each analog input are two
on-chip diodes that conduct forward current for analog input voltages one diode drop above VCC .Care must be taken during testing
at low VCC levels (4.5 V) because high-level analog input voltage (5 V) can, especially at high temperatures, cause this input diode
to conduct and cause errors for analog inputs that are near full-scale. As long as the analog voltage does not exceed the supply
voltage by more than 50 mV, the output code will be correct. To achieve an absolute 0 V to 5 V input voltage range requires a minimum
VCC of 4.95 V for all variations of temperature and load.
4. Standby input currents are currents going into or out of the on or off channels when the A/D converter is not performing conversion
and the clock is in a high or low steady-state condition.
operating characteristics VCC = REF = 5 V, fclock = 250 kHz, tr = tf = 20 ns, TA = 25°C (unless otherwise
noted)
PARAMETER
TEST CONDITIONS§
AI, AC SUFFIX
BI, BC SUFFIX
UNIT
PARAMETER
TEST CONDITIONS§
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
Supply-voltage variation error
VCC = 4.75 V to 5.25 V
±1/16
±1/4
±1/16
±1/4
LSB
Total unadjusted error (see Note 5)
Vref = 5 V,
TA = MIN to MAX
±1
±1/2
LSB
Common-mode error
Differential mode
±1/16
±1/4
±1/16
±1/4
LSB
t d
Propagation delay time,
ouput data after CLK
↑
MSB-first data
CL = 100 pF
650
1500
650
1500
ns
tpd
ouput data after CLK
↑
(see Note 6)
LSB-first data
CL = 100 pF
250
600
250
600
ns
tdi
Output disable time,
CL = 10 pF, RL = 10 k
125
250
125
250
ns
tdis
,
DO after CS
↑
CL = 100 pF, RL = 2 k
500
ns
tconv
Conversion time (multiplexer addressing
time not included)
8
clock
periods
§ All parameters are measured under open-loop conditions with zero common-mode input voltage. For conditions shown as MIN or MAX, use the
appropriate value specified under recommended operating conditions.
NOTES:5. Total unadjusted error includes offset, full-scale, linearity, and multiplexer errors.
6. The most significant-bit-first data is output directly from the comparator and therefore requires additional delay to allow for comparator response
time. Least-significant-bit-first data applies only to ADC0832.
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