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参数资料
| 型号： | HI7131CPL |
| 厂商： | INTERSIL CORP |
| 元件分类： | ADC |
| 英文描述： | 3 1/2 Digit, Low Power, High CMRR, LCD/LED Display-Type A/D Converters |
| 中文描述： | 1-CH 3-BIT DUAL-SLOPE ADC, PARALLEL ACCESS, PDIP40 |
| 封装： | PLASTIC, DIP-40 |
| 文件页数： | 6/21页 |
| 文件大小： | 209K |
| 代理商： | HI7131CPL |
3-1831
Typical Integrator Amplifier Output Waveform (INT Pin)
Design Information Summary Sheet
OSCILLATOR FREQUENCY
f
OSC
≈
0.45/RC
(OSC)
C
OSC
≥
50pF
R
OSC
> 50k
C
OSC
= 50pF, R
OSC
= 180k
; f
OSC
(Typ) = 48kHz
CLOCK FREQUENCY
f
CLOCK
= f
OSC
/4
CLOCK PERIOD
t
CLOCK
= 1/f
CLOCK
CONVERSION CYCLE
T
CYC
= 4000 x t
CLOCK
= 16000 x t
OSC
For f
OSC
= 40kHz; T
CYC
= 400ms
SIGNAL INTEGRATION PERIOD
T
INT
= 1000 x t
CLOCK
60/50Hz REJECTION CRITERIA
T
INT
/ t
60Hz
or T
INT
/ t
50Hz
= Integer
OPTIMUM FULL SCALE ANALOG INPUT RANGE
V
INFS
= 200mV to 2V
INPUTS VOLTAGE RANGE
(V- + 1V) < V
IN LO
or V
IN HI
< (V+ - 1V)
MAXIMUM INTEGRATION CURRENT
I
INT(MAX)
= V
INFS
/ R
INT
Maximum integration current should be the maximum
buffer output current with no nonlinearity effect.
Maximum Buffer Output Current = 1
μ
A
INTEGRATOR MAXIMUM OUTPUT VOLTAGE SWING
V
INT(MAX)
= (T
INT
) (I
INT(MAX)
)/C
INT
(V- + 0.5) < V
INT(MAX)
< (V+ - 0.5)
(Typ) V
INT(MAX)
= 2V
INTEGRATING RESISTOR
R
INT
= V
INFS
/ I
INT(MAX)
INTEGRATING CAPACITOR
C
INT
= (T
INT
) (I
INT(MAX)
) / V
INT(MAX)
AUTO-ZERO CAPACITOR VALUE
REFERENCE CAPACITOR VALUE
0.1
μ
F < C
REF
< 1
μ
F
REFERENCE INPUTS VOLTAGE RANGE
V- < V
REFLO
or V
REFHI
< V+
REFERENCE VOLTAGE
V
REF
= V
INFS
/2
COMMON PIN VOLTAGE
V
COMMON
= V+ - 2.8, (Typ), V
COMMON
is regulated and
can be used as a reference. It is biased between V+ and
V- and regulation is lost at (V+ -V-) < 6.8V. V
COMMON
pin
does not have sink capability and can be externally pulled
down to lower voltages.
DISPLAY TYPE
LCD, Non-Multiplexed
POWER SUPPLY, V+ TO V-
Single +9V or 5V Nominal, +5V to +12V Functional
DISPLAY READING
Reading = 1000 x (V
IN
/ V
REF
)
Maximum Reading = 1999, for V
IN
= 1.999 x V
REF
INTEGRATOR
VOLTAGE SWING
AUTO-ZERO PHASE
100 COUNTS OR
990 - 2990 COUNTS
SIGNAL INTEGRATE
PHASE FIXED
1000 COUNTS
DEINTEGRATE PHASE
0 - 2000 COUNTS
ZERO INTEGRATE PHASE
10 COUNTS OR
900 COUNTS
4000 COUNTS: TOTAL OF EACH CONVERSION CYCLE
NOTE: 1 Count = 1 Clock Cycle = 4 Oscillator Cycles.
HI7131, HI7133
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相关代理商/技术参数 |
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| HI7133 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:3 1/2 Digit, Low Power, High CMRR, LCD/LED Display-Type A/D Converters |
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