HI-8573, HI-8574, HI-8575
PIN DESCRIPTIONS
PIN
SYMBOL
FUNCTION
HI-8573
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Output A
Input A-
Input A+
V
CC
Input B+
Input B-
Output B
I
SET
A, B
I
SET
C, D
Output C
Input C-
Input C+
V
EE
Input D+
Input D-
Output D
Analog output
Analog input
Analog input
Power
Analog input
Analog input
Analog output
Analog input
Analog input
Analog output
Analog input
Analog input
Power
Analog input
Analog input
Analog output
Amplifier D
Amplifier D
Amplifier D
Amplifier C
Amplifier C
Amplifier C
Amplifier B
Amplifier B
Amplifier B
Amplifier A
Amplifier A
Amplifier A
DESCRIPTION
HI-8574
Comparator A
Comparator A
Comparator A
Positive supply voltage
Comparator B
Comparator B
Comparator B
Bias control for A and B
Bias control for C and D
Comparator C
Comparator C
Comparator C
Negative supply voltage
Comparator D
Comparator D
Comparator D
Comparator D
Comparator D
Comparator D
Comparator C
Comparator C
Comparator C
Amplifier B
Amplifier B
Amplifier B
HI-8575
Amplifier A
Amplifier A
Amplifier A
PROGRAMMING CURRENT
The programming current I
SET
is fixed by an external re-
sistor R
SET
connected between V
EE
and either one or
both of the I
SET
pins (8 and 9). When two external pro-
gramming resistors are used, the set currents for each op
amp pair or comparator are given by:
I
SET
(
m
A)
@
(V
CC
-V
EE
-1.0)/R
SET
(M
W
)
Pins 8 and 9 may be tied together for use with a single pro-
gramming resistor. The set currents for each op amp or
comparator pair are then given by:
I
SET
(
m
A)
@
(V
CC
-V
EE
-1.0)/2 R
SET
(M
W
)
If a pair of op amps or comparators are not used, the I
SET
pin for that pair may be tied to V
CC
for minimum power
consumption.
-3
It should be noted that increasing I
SET
for comparators
will decrease propagation delay for that comparator.
For operational amplifiers, the maximum obtainable out-
put voltage (V
OH
) for a given load resistor connected to
V
EE
is given by:
V
OH
= (4 x 10 I
SET
)R
L
- 0.05V
if (4 x 10 I
SET
) R
L
< V
CC
where, R
L
is in K
W
, I
SET
is in
m
A
Typical op amp slew rates are given by:
S
R
@
0.05 I
SET
(V/
m
s).
where, I
SET
is in
m
A
-3
HOLT INTEGRATED CIRCUITS
2
HOLTIC [ HOLT INTEGRATED CIRCUITS ]
