LOW POWER, SINGLE-SUPPLY, RAIL-TO-RAIL
OPERATIONAL AMPLIFIERS
MicroAmplifier
™
Series
FEATURES
● RAIL-TO-RAIL INPUT
● RAIL-TO-RAIL OUTPUT (within 1mV)
● LOW QUIESCENT CURRENT: 150
µA typ
●
Micro
SIZE PACKAGES
SOT23-5
MSOP-8
TSSOP-14
● GAIN-BANDWIDTH
OPA344: 1MHz, G ≥ 1
OPA345: 3MHz, G ≥ 5
● SLEW RATE
OPA344: 0.8V/µs
OPA345: 2V/µs
● THD + NOISE: 0.006%
APPLICATIONS
● PCMCIA CARDS
● DATA ACQUISITION
● PROCESS CONTROL
● AUDIO PROCESSING
● COMMUNICATIONS
● ACTIVE FILTERS
● TEST EQUIPMENT
DESCRIPTION
The OPA344 and OPA345 series rail-to-rail CMOS
operational amplifiers are designed for precision, low-power,
miniature applications. The OPA344 is unity gain stable,
while the OPA345 is optimized for gains greater than or equal
to five, and has a gain-bandwidth product of 3MHz.
The OPA344 and OPA345 are optimized to operate on a
single supply from 2.5V and up to 5.5V with an input
common-mode voltage range that extends 300mV
beyond the supplies. Quiescent current is only
250µA (max).
Rail-to-rail input and output make them ideal for driving
sampling analog-to-digital converters. They are also well suited
for general purpose and audio applications and providing I/V
conversion at the output of D/A converters. Single, dual and
quad versions have identical specs for design flexibility.
A variety of packages are available. All are specified for
operation from –40ºC to 85ºC. A SPICE macromodel for
design analysis is available for download from www.ti.com.
OPA345
OPA2345
OPA4345
OPA344
OPA2344
OPA4344
1
2
3
5
4
V+
–In
Out
V–
+In
OPA344, OPA345
SOT23-5
1
2
3
4
8
7
6
5
NC
V+
Out
NC
NC
–In
+In
V–
OPA344, OPA345
SO-8, 8-Pin DIP (OPA344 Only)
1
2
3
4
8
7
6
5
V+
Out B
–In B
+In B
Out A
–In A
+In A
V–
OPA2344, OPA2345
SO-8, MSOP-8, 8-Pin DIP (OPA2344 Only)
A
B
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Out D
–In D
+In D
–V
+In C
–In C
Out C
Out A
–In A
+In A
+V
+In B
–In B
Out B
OPA4344, OPA4345
TSSOP-14, SO-14, 14-PIn DIP (OPA4344 Only)
AD
BC
®
O
PA3
42
O
P
A
4
3
4
4
O
P
A
3
4
4
O
PA
345
www.ti.com
www.ti.com
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.
Copyright © 2000-2008, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
SBOS107A – APRIL 2000 – REVISED AUGUST 2008
