RT2903H
RobuST low-power dual voltage comparators
Datasheet - production data
•
•
D
SO8
(plastic micropackage)
Pin connections (top view)
•
1 - Output 1
2 - Inverting inpput 1
3 - Non-inverting input 1
4 - VCC-
5 - Non-inverting input 2
6 - Inverting input 2
7 - Output 2
8 - VCC+
Differential input voltage range equal to the
supply voltage
TTL, DTL, ECL, MOS, CMOS compatible
outputs
Intended for use in aerospace and defense
applications:
−
Dedicated traceability and part marking
−
Approval documents available for
production parts
−
Adapted extended life time and
obsolescence management
−
Extended product change notification
process
−
Designed and manufactured to meet
sub ppm quality goals
−
Advanced mold and frame designs for
superior resilience to harsh
environments (acceleration, EMI,
thermal, humidity)
−
Extended screening capability on
request
−
Single fabrication, assembly, and test
site
−
Temperature range (-40 °C to 150 °C)
Applications
•
•
Aerospace and defense
Harsh environments
Features
•
•
•
•
•
•
Wide single supply voltage range or dual
supplies: 2 V to 36 V or ±1 V to ±18 V
Very low supply current (0.4 mA)
independent of supply voltage
(1 mW/comparator at 5 V)
Low input bias current: 25 nA typ.
Low input offset current: ±5 nA typ.
Input common-mode voltage range includes
ground
Low output saturation voltage: 250 mV typ.
(I
O
= 4 mA)
Description
This device consists of two independent low-
power voltage comparators designed specifically
to operate from a single power supply over a
wide range of voltages. Operation from split
power supplies is also possible.
These comparators also have a unique
characteristic in that the input common-mode
voltage range includes ground even though
operated from a single power supply voltage.
October 2014
DocID026955 Rev 1
1/11
www.st.com
This is information on a product in full production.
Contents
RT2903H
Contents
1
2
3
4
5
6
Absolute maximum ratings and operating conditions ................. 3
Schematic diagram.......................................................................... 4
Electrical characteristics ................................................................ 5
Package information ....................................................................... 7
4.1
SO8 package information .................................................................. 8
Ordering information....................................................................... 9
Revision history ............................................................................ 10
2/11
DocID026955 Rev 1
RT2903H
Absolute maximum
ratings and operating
conditions
1
Absolute maximum ratings and operating conditions
Table 1: Absolute maximum ratings
Symbol
V
CC
V
id
V
in
R
thja
R
thjc
T
j
ESD
Supply voltage
Differential input voltage
Input voltage
Output short-circuit duration
(1)
(2)
Parameter
Value
±18 or 36
±36
-0.3 to 36
20
125
40
160
800
200
(2)
Unit
V
mA
°C/W
°C
Thermal resistance junction-to-ambient
Thermal resistance junction-to-case
Maximum junction temperature
HBM: human body model
MM: machine model
(4)
(5)
(3)
V
CDM: charged device model
T
stg
Notes:
Storage temperature
1500
-65 to 150
°C
Short-circuit from the output to V
CC
can cause excessive heating and eventual destruction. The maximum
+
output current is approximately 20 mA, independent of the magnitude of V
CC
.
(2)
(3)
(1)
+
Short-circuits can cause excessive heating and destructive dissipation. Values are typical.
Human body model: A 100 pF capacitor is charged to the specified voltage and then discharged through a
1.5 kΩ resistor between two pins of the device. This is done for all couples of connected pin combinations
while the other pins are floating.
Machine model: A 200 pF capacitor is charged to the specified voltage, then discharged directly between two
pins of the device with no external series resistor (internal resistor < 5 Ω). This is done for all couples of
connected pin combinations while the other pins are floating.
(5)
(4)
Charged device model: all pins and the package are charged together to the specified voltage and then
discharged directly to the ground through only one pin. This is done for all pins.
Table 2: Operating conditions
Symbol
V
CC
+
Parameter
Supply voltage
Operating free air temperature range
Input common mode voltage range
(1)
(V
CC
= 30 V)
T
amb
= 25 °C
T
min
≤ T
amb
≤ T
max
Value
2 to 6
-40 to 150
0 to (V
CC
) - 1.5
0 to (V
CC
) - 2
+
+
Unit
V
°C
V
T
oper
V
icm
Notes:
The input common-mode voltage of either input signal voltage should not be allowed to go negative by more
+
than 0.3 V. The upper end of the common-mode voltage range is (V
CC
) – 1.5 V, but either or both inputs can go
to 30 V without damage.
(1)
DocID026955 Rev 1
3/11
Schematic diagram
RT2903H
2
Schematic diagram
Figure 1: Schematic diagram (1/2 RT2903H)
VCC+
3.5µA
100µA
3.5µA
100µA
Non-Inverting
Input
Vo
VCC-
Inverting
Input
VCC-
VCC-
4/11
DocID026955 Rev 1
RT2903H
Electrical characteristics
3
Symbol
V
io
I
io
I
ib
A
vd
I
CC
V
ID
V
OL
I
OH
I
sink
t
re
t
rel
Electrical characteristics
Table 3: V
CC
= 5 V, V
CC
= ground, T
amb
= 25 °C (unless otherwise specified)
Parameter
Input offset voltage
(1)
+
-
Test conditions
T
min
≤ T
amb
≤ T
max
Min.
Typ.
1
Max.
7
15
Unit
mV
Input offset current
(2)
5
T
min
≤ T
amb
≤ T
max
25
T
min
≤ T
amb
≤ T
max
+
V
CC
50
150
250
400
nA
Input bias current
Large signal voltage gain,
Supply current
(all comparators)
Differential input voltage
Low level output voltage
(3)
= 15 V, R
L
= 15 kΩ, V
o
= 1 to 11 V
+
+
25
200
0.4
1
1
2.5
V
CC
+
V/mV
mA
V
mV
nA
1
µA
mA
µs
500
1
ns
µs
V
CC
= 5 V, no load
V
CC
= 30 V, no load
V
id
= -1 V, I
sink
= 4 mA
T
min
≤ T
amb
≤ T
max
V
CC
= V
o
= 30 V, V
id
= 1 V
T
min
≤ T
amb
≤ T
max
V
id
= -1 V, V
o
= 1.5 V
T
min
≤ T
amb
≤ T
max
+(4)
+
250
400
800
High level output current
0.1
Output sink current
6
2
16
Small signal response time, R
L
= 5.1 kΩ connected to V
CC
Large signal response time,
TTL input, V
ref
= 1.4 V,
+(5)
R
L
= 5.1 kΩ to V
CC
1.3
Output signal at 50 % of final value
Output signal at 95 % of final value
Notes:
(1)
At output switch point, V
O
≈ 1.4 V, R
S
= 0 Ω with V
CC
from 5 V to 30 V, and over the full input common-mode range
+
(0 V to (V
CC
) – 1.5 V).
The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent of
the state of the output, so there is no load charge on the reference of input lines.
+
(2)
(3)
Positive excursions of input voltage may exceed the power supply level. As long as the other voltage remains within the
common-mode range, the comparator provides a proper output state. The low input voltage state must not be less than –0.3 V
(or 0.3 V below the negative power supply, if used)
The response time specified is for a 100 mV input step with 5 mV overdrive.
Maximum values are guaranteed by design and evaluation.
(4)
(5)
DocID026955 Rev 1
5/11
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