LP239 [TI]
LOW-POWER QUAD DIFFERENTIAL COMPARATORS; 低功耗四通道差分比较仪
| 型号： | LP239 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | LOW-POWER QUAD DIFFERENTIAL COMPARATORS |
| 文件： | 总7页 (文件大小：96K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LP239, LP339, LP2901
LOW-POWER QUAD DIFFERENTIAL COMPARATORS
SLCS004A – OCTOBER 1987 – REVISED MAY 1988
D, J, OR N PACKAGE
(TOP VIEW)
Ultralow Power Supply Current
Drain . . . 60 µA Typ
Low Input Biasing Current . . . 3 nA
Low Input Offset Current . . . ±0.5 nA
Low Input Offset Voltage . . . ±2 mV
1OUT
2OUT
3OUT
4OUT
GND
4IN +
4IN –
3IN +
3IN –
1
2
3
4
5
6
7
14
13
12
11
10
9
V
CC
Common-Mode Input Voltage Includes
Ground
2IN –
2IN +
1IN –
1IN +
Output Voltage Compatible With MOS and
CMOS Logic
8
High Output Sink-Current Capability
(30 mA at V = 2V)
O
Power Supply Input Reverse-Voltage
Protected
Single-Power-Supply Operation
Pin-for-Pin Compatible With LM239, LM339,
LM2901
description
The LP239, LP339, LP2901 are low-power quadruple differential comparators. Each device consists of four
independent voltage comparators designed specifically to operate from a single power supply and typically to
draw 60-µA drain current over a wide range of voltages. Operation from split power supplies is also possible
and the ultralow power supply drain current is independent of the power supply voltage.
Applications include limit comparators, simple analog-to-digital converters, pulse generators, squarewave
generators, time delay generators, voltage controlled oscillators, multivibrators, and high-voltage logic gates.
The LP239, LP339, LP2901 were specifically designed to interface with the CMOS logic family. The ultralow
power supply current makes these products desirable in battery-powered applications.
The LP239 is characterized for operation from – 25°C to 85°C. The LP339 is characterized for operation from
0°C to 70°C. The LP2901 is characterized for operation from – 40°C to 85°C.
AVAILABLE OPTIONS
PACKAGE
T
A
V
IO
max AT 25°C
SMALL OUTLINE
(D)
PLASTIC DIP
(N)
CERAMIC DIP
(J)
0 °C to 70 °C
– 25 °C to 85 °C
– 40 °C to 85 °C
±5 mV
±5 mV
±5 mV
LP339D
LP239D
LP2901D
LP339N
LP239N
LP2901N
LP339J
LP239J
LP2901J
The D package is available taped-and-reeled. Add R suffix to device type when ordering (e.g., LP339DR).
Copyright 1988, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LP239, LP339, LP2901
LOW-POWER QUAD DIFFERENTIAL COMPARATORS
SLCS004A – OCTOBER 1987 – REVISED MAY 1988
schematic diagram (each comparator)
V
CC
0.2 µA
5 µA
0.2 µA
6 µA
IN +
IN –
OUT
GND
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 V
CC
Differential input voltage, V (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±36 V
Input voltage range, V (either input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 36 V
ID
I
Input current, V ≤ – 0.3 V (see Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 50 mA
I
Duration of output short-circuit to ground (see Note 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unlimited
Continuous total dissipation (see Note 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range, T : LP239 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 25°C to 85°C
A
LP339 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
LP2901 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 85°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Lead temperature range 1,6 mm (1/16 inch) from case for 10 seconds: D or N package . . . . . . . . . . . 260°C
Lead temperature range 1,6 mm (1/16 inch) from case for 60 seconds: J package . . . . . . . . . . . . . . . . 300°C
†
Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and
functionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedintherecommendedoperatingconditionsisnotimplied.
Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltage values, except differential voltages, are with respect to the network ground.
2. Differential voltages are at IN+ with respect to IN –.
3. This input current only exists when the voltage at any of the inputs is driven negative. The current flows through the collector-base
junction of the input clamping device. In addition to the clamping device action, there is lateral n-p-n parasitic transistor action. This
action is not destructive and normal output states are re-established when the input voltage returns to a value more positive than
– 0.3 V at T = 25°C.
A
4. Short circuits between outputs to V
can cause excessive heating and eventual destruction.
CC
5. If the output transistors are allowed to saturate, the low bias dissipation and the on-off characteristics of the outputs keep the
dissipation very small (usually less than 100 mW).
DISSIPATION RATING TABLE
T
≤ 25°C
DERATING FACTOR
T
= 70°C
T = 85°C
A
POWER RATING
A
A
PACKAGE
POWER RATING
ABOVE T = 25°C
POWER RATING
A
D
J
N
950 mW
1025 mW
1150 mW
7.6 mW/°C
8.2 mW/°C
9.2 mW/°C
608 mW
656 mW
736 mW
494 mW
533 mW
598 mW
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LP239, LP339, LP2901
LOW-POWER QUAD DIFFERENTIAL COMPARATORS
SLCS004A – OCTOBER 1987 – REVISED MAY 1988
recommended operating conditions
LP239
LP339
LP2901
MIN MAX
UNIT
MIN
MAX
30
3
MIN
MAX
30
3
V
V
Supply voltage
5
0
5
0
0
0
0
0
5
0
0
0
0
30
3
V
V
CC
V
CC
V
CC
V
CC
V
CC
= 5 V
Common-mode input voltage
IC
= 30 V
= 5 V
0
28
3
28
3
28
3
V
0
V
V
I
Input voltage
= 30 V
0
28
85
28
28
85
V
T
A
Operating free-air temperature
– 25
70 – 40
°C
electrical characteristics, V
= 5 V, T = 25°C (unless otherwise noted)
A
CC
†
PARAMETER
TEST CONDITIONS
T
A
MIN
TYP MAX
UNIT
25°C
Full range
25°C
±2
±5
±9
V
= 5 V to 30 V, = 2 V,
V
O
CC
V
Input offset voltage
Input offset current
Input bias current
mV
IO
RS = 0,
See Note 6
±0.5
±1
±5
I
I
nA
nA
IO
Full range
25°C
±15
– 25
– 40
– 2.5
– 4
See Note 7
IB
Full range
0 to
25°C
V
– 1.5
CC
0 to
– 2
Common-mode input voltage
range
V
ICR
Single supply
V
Full range
V
CC
Large-signal differential voltage
amplification
A
V
= 15 V,
RL = 15 kΩ
500
30
V/mV
mA
VD
CC
25°C
Full range
25°C
20
V
= 2 V,
O
V
I –
V
I +
= 1 V,
= 0
See Note 8
Output sink current
15
V
O
V
O
V
O
= 0.4 V
= 5 V
0.2
0.7
0.1
25°C
nA
µA
V
V
I +
V
I –
= 1 V,
= 0
Output leakage current
= 30 V
Full range
1
36
V
ID
Differential input voltage
Supply current
V ≤ 0 (or V
I
on split supplies)
CC –
= ∞ all comparators
L
I
R
60
100
µA
CC
†
Full range is –25°C to 85°C for the LP239, 0°C to 70°C for the LP339, and –40°C to 85°C for the LP2901.
NOTES: 6. V is measured over the full common-mode input voltage range.
IO
7. Becauseofthep-n-pinputstage, thedirectionofthecurrentisoutofthedevice. Thiscurrentisessentiallyconstant(i.e., independent
of the output state). No loading change exists on the reference or input lines as long as the common-mode input voltage range is
not exceeded.
8. The output sink current is a function of the output voltage. These devices have a bimodal output section that allows them to sink
(via a Darlington connection) large currents at output voltages greater than 1.5 V, and smaller currents at output voltages
less than 1.5 V.
switching characteristics, V
= 5 V, T = 25°C, R connected to 5 V through 5.1 kΩ
L
CC
A
PARAMETER
Large-signal response time
Response time
TEST CONDITIONS
MIN
TYP MAX
UNIT
1.3
8
TTL logic swing, V = 1.4 V
ref
µs
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LP239, LP339, LP2901
LOW-POWER QUAD DIFFERENTIAL COMPARATORS
SLCS004A – OCTOBER 1987 – REVISED MAY 1988
APPLICATION INFORMATION
Figure 1 shows the basic configuration for using the LP239, LP339, or LP2901 comparator. Figure 2 shows the
diagram for using one of these comparators as a CMOS driver.
V
CC
V
CC
30 kΩ
100 kΩ
+
–
IN +
IN –
3
+
–
IN +
IN –
OUT
OUT
1/4 LP239, LP339,
or LP2901
12
Figure 1. Basic Comparator
1/4 LP239, LP339,
or LP2901
1/4 SN54/74LS00 or
1/4 SN54/74ALS1000A
Figure 2. CMOS Driver
All pins of any unused comparators should be grounded. The bias network of the LP239, LP339, and LP2901
establishes a drain current that is independent of the magnitude of the power supply voltage over the range of
2 V to 30 V. It is usually necessary to use a bypass capacitor across the power supply line.
The differential input voltage may be larger than V
without damaging the device. Protection should be
CC
provided to prevent the input voltages from going negative by more than – 0.3 V. The output section has two
distinct modes of operation: a Darlington mode and a ground-emitter mode. This unique drive circuit permits
the device to sink 30 mA at V = 2 V in the Darlington mode and 700 µA at V = 0.4 V in the ground-emitter
O
O
mode. Figure 3 is a simplified schematic diagram of the output section. The output section is configured in a
Darlington connection (ignoring Q3). If the output voltage is held high enough (above 1 V), Q1 is not saturated
andtheoutputcurrentislimitedonlybytheproductoftheh ofQ1,theh ofQ2,andI1andthe60-Ωsaturation
FE
FE
resistanceofQ2. ThedevicesarecapableofdrivingLEDs, relays, etc. inthismodewhilemaintaininganultralow
power supply current of 60 µA typically.
V
CC
I1 = 6 µA
Q3
V
O
Q1
Q2
Figure 3. Output-Section Schematic Diagram
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LP239, LP339, LP2901
LOW-POWER QUAD DIFFERENTIAL COMPARATORS
SLCS004A – OCTOBER 1987 – REVISED MAY 1988
APPLICATION INFORMATION
Without transistor Q3, if the output voltage were allowed to drop below 0.8 V, transistor Q1 would saturate and
the output current would drop to zero. The circuit would be unable to pull low current loads down to ground or
the negative supply, if used. Transistor Q3 has been included to bypass transistor Q1 under these conditions
and apply the current I1 directly to the base of Q2. The output sink current is now approximately I1 times the
h
of Q2 (700 µA at V = 0.4 V). The output of the devices exhibit a bimodal characteristic with a smooth
FE
O
transition between modes.
In both cases, the output is an uncommitted collector. Several outputs can be tied together to provide a dot logic
function. An output pullup resistor can be connected to any available power supply voltage within the permitted
power supply range, and there is no restriction on this voltage based on the magnitude of the voltage that is
supplied to V
of the package.
CC
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
6
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Copyright 1998, Texas Instruments Incorporated
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