RP-UPDATE.DEC
Product Update: Op amps
Here is a sampling of recently introduced amplifiers and buffers
Devices have rail-to-rail input and output
The LMC6482 dual and LMC6484 quad CMOS op amps offer a rail-to-rail input
and output. The rail-to-rail input common-mode voltage range is 0 to 5 V for
a +5-V supply; the rail-to-rail output swing is to within 20 mV of the
supply rails with a 100-kohm load. Both the LMC6482 and LMC6484 have a
750-microvolt max offset voltage, a CMRR of 70 dB min, and a bias current of
20 fA. The devices operate from +3 to +15-V single supplies and are
available in molded 8-pin DIPs and SO packages. (LMC6482, from $1.55
ea/1,000; LMC6484, from $2.35 ea/1,000–available now.) National
Semiconductor Corp. Santa Clara, CA Tracy Uedoi 408-721-5856
Amplifiers for high-performance video
The EL4390/93 are triple 60-MHz video amplifiers optimized for
high-performance video systems. Both devices have 900-V/μs slew rates and
can drive 150-ohm loads at video signal levels. The EL4390 includes dc
restore capabilities and is activated by TTL/CMOS-compatible control
signals. The EL4390/93 have bandwidths that remain constant at about 60 MHz
over a gain range of +/-1 to +/-10. The amplifiers operate from +/-4 to
+/-15-V supplies and come in 16-lead plastic DIPs and SO packages. (EL4393,
from $6.95 ea/100; EL4390, from $9.95 ea/100–samples available now.)
Elantec, Inc., Milpitas, CA Pat Mayer 408-945-1323, ext. 303
Power op amp comes in 10-pin SIP
The PA42 is a monolithic 350-V MOSFET power op amp that is available in a
10-pin SIP. The device has an output current capability of 60 mA and a
quiescent current use of 2 mA. Other features of the PA42 include a 26-kHz
power bandwidth and a 40-V/μs slew rate. In addition, the amp offers
external phase compensation as well as external current limiting. ($29.85
ea/100–6 weeks ARO.) Apex Microtechnology Corp. Tucson, AZ Marie Rivera
602-690-8603 Fax 602-888-3329
3-V dual op amp swings rail to rail
The OP-295 dual op amp operates from a single supply as low as 3 V and is
capable of rail-to-rail output voltage swing. When driving a 10-kohm load
from a 3-V supply, the device has a minimum output swing from 2.90 V to
within 2 mV of ground. For +3-V operation, the OP-295 has an offset voltage
of 500 microvolts max, a gain of 1,000 V/mV, and a supply current use of 300
microamps max. In addition, voltage offset drift is 1 microvolts/ degreesC
typ, voltage noise is 1.6 microvoltsp-p, and voltage noise density is 53
nV/
typical gain-bandwidth product of 75 kHz. It comes in 8-pin plastic DIPs,
CerDIPs, and SO packages, as well as in die form. (From $1.98
ea/1,000–stock.) Analog Devices, Inc., Norwood, MA Information 617-937-1428
Fax 617-821-4273
11-MHz device uses 1-mA supply current
The LT1200 is a unity-gain-stable voltage-feedback op amp with an 11-MHz
unity-gain bandwidth and a 50-V/μs slew rate. It uses a typical supply
current of only 1 mA and operates from single +5- to +/-15-V supplies. The
LT1200's dc specifications include a 1.0-mV maximum offset voltage and a
settling time of 430 ns for a 10-V step to 0.1% of final value. The device
has a minimum output drive current of 6 mA and can drive all capacitive
loads. It is available in 8-pin DIPs and SO packages. (From $2.95
ea/100–stock.) Linear Technology Corp. Milpitas, CA Information
800-637-5545 Fax 408-434-0507
100-MHz amp needs no external output buffer
The LM6181 current-feedback amplifier has a 100-MHz bandwidth, a
2,000-V/μs slew rate, and an output current capability of 100 mA. In
addition, the device has a 50-ns settling time to 0.1%, and a differential
gain and phase of 0.05% and 0.04 degrees, respectively. The LM6181 is fully
characterized and specified at both +/-5- and +/-15-V operation. The amp is
available in 8-pin plastic DIPs and 16-pin SO packages. A free evaluation
kit, including a fully assembled evaluation board and Spice macromodel, is
available. ($2.45 ea/1,000–available now.) National Semiconductor Corp.
Santa Clara, CA Mark Cosgrove 408-721-6973
Audio op amp uses all-FET signal path
The OPA604 is a FET-input op amp optimized for audio use. It uses FETs
throughout the signal path, including the input stage, input-stage load, and
the phase-splitting section of the output stage. The unity-gain-stable
OPA604 slews at 25 V/μs and has a gain-bandwidth product of 20 MHz. At 1
kHz it has 10 nV/
operates from +/-4.5 to +/-24-V supplies and can drive 600-ohm loads to full
output voltage swing capability. The OPA604 is available in 8-pin plastic
DIPs. (From $0.97 ea/100–available now.) Burr-Brown Corp., Tucson, AZ John
Conlon 800-548-6132 Fax 602-889-1510
Micropower dual op amp swings rail-to-rail
The MAX407 is a micropower dual op amp that uses less than 1.2 microamps of
supply current per amplifier. In addition, the device's output stage swings
to both supply rails. The MAX407 has an input bias current of less than 0.1
pA and is capable of sourcing as much as 2 mA. It operates from a single
+2.5 to 10-V supply or dual +/-1.75 to +/-5 V supplies. The MAX407 comes in
8-pin plastic DIPs, CerDIPs, and SO packages. (From $2.98
ea/1,000–available now.) Maxim Integrated Products Sunnyvale, CA
Information 408-737-7600, ext. 6087
Wideband variable-gain amp operates to 165 MHz
The CLC522 variable-gain amplifier (VGA) is a dc-coupled, two-quadrant
multiplier with differential voltage inputs and a single-ended voltage
output. The device has a signal-channel and gain-control channel bandwidth
of 165 MHz (at 10 V/V) and is a complete VGA system that does not require
external buffering. Two external resistors can be used to set the CLC522's
maximum gain anywhere between 2 V/V and 100 V/V, providing a 40-dB
voltage-controlled gain. Gain-control nonlinearity over the full 40-dB
gain-control range is 0.5% and gain accuracy at 10 V/V is +/-0.3%. The
CLC522 is available in 14-pin plastic DIPs and SO packages. (From $9.26
ea/1,000–available now.) Comlinear Corp., Fort Collins, CO Tom Baldwin
303-226-0500 Fax 303-226-0564
Buffer amp operates to 850 MHz
The HFA1112 closed-loop buffer amp has a -3-dB bandwidth of 850 MHz. The
device offers 0.033 dB of gain flatness to 100 MHz, a 1,700-V/μs slew
rate, and user-programmable closed-loop voltage gain of +1, -1, or +2
without external resistors. Other features of the HFA1112 include a 7-ns
settling time to 0.1%, third harmonic distortion of -80 dB at 50 MHz, and an
output current capability of 60 mA. In addition, the device has a
differential gain and phase of 0.02% and 0.02 degrees, respectively. The
HFA1112 consumes 21 mA from a +/-5-V supply and comes in 8-pin plastic DIPs,
CerDIPs, and SO packages. (From $5.95 ea/100–stock.) Harris Semiconductor
Corp. Melbourne, FL Linda daCosta 407-724-3704
High-speed devices use little power
The MAX438/439 op amps offer high speed and micropower operation. The MAX438
uses less than 75 microamps while providing a 6-MHz gain-bandwidth product
and a 10-V/μs slew rate. The MAX439 has a 10-MHz gain-bandwidth product,
a 48-V/μs slew rate, and draws less than 375 microamps. The MAX438 drives
a 10-kohm load to +/-3.6 V, and the MAX439 drives a 2-kohm load to +/-3.3 V.
Both devices operate with supply voltages from +/-3 to +/-5 V and are
available in 8-pin DIPs and SO packages. (MAX438, from $1.85 ea/10,000;
MAX439, from $2.55 ea/10,000–available now.) Maxim Integrated Products
Sunnyvale, CA Information 408-737-7600, ext. 6087
Op amps combine low cost and high precision
The LT1112 dual and LT1114 quad op amps have a typical offset voltage of 20
microvolts and a maximum offset voltage of 75 microvolts for the low-cost
grades. In addition, the offset voltage drift is a guaranteed maximum of 0.5
microvolts/ degreesC (0.75 microvolts/ degreesC for the low-cost grades.)
Other features of the LT1112/4 include power consumption of 400 microamps,
0.1 to 10-Hz noise of 0.32 microvoltsp-p, and a slew rate of 0.3 V/μs.
The minimum open-loop gain into a 10-kohm load is 1 million V/V (5 million
typ). The LT1112 is available in 8-lead DIPs and SO packages; the LT1114
comes in 14-lead plastic and ceramic DIPs. (From $2.45 ea/100–available
now.) Linear Technology Corp. Milpitas, CA Information 800-637-5545 Fax
408-434-0507
Power op amp delivers 10 A output current
The OPA502 high-power op amp can deliver 10 A of output current. The device
operates from +/-10 to +/-45-V supplies and has a quiescent current use of
20 mA. In addition, the amp has a 10-V/μs slew rate, an input bias
current of 200 pA, and resistor-programmable current limiting. The OPA502 is
packaged in an industry-standard 8-pin hermetic TO-3 case. (From $37.95
ea/100–stock.) Burr-Brown Corp., Tucson, AZ Howard Hom 800-548-6132 Fax
602-889-1510
CMOS device is optimized for +5-V operation
Operating off a single supply of +5 V or supplies of +/-2.5 to +/-5 V, the
ALD1712 offers rail-to-rail input and output signal voltage ranges. The
device is specifically designed for oscillation-resistant +5-V operation and
uses on-chip trimming to achieve offset voltages as low as 150 microvolts.
The ALD1712 has an input impedance of 10
bandwidth of 1.5 MHz, and a slew rate of 2.1 V/μs. In addition, the
device can drive up to 400-pF capacitive and 1-kohm resistive loads in
non-inverting mode; in inverting mode, the amp can drive up to 800 pF. The
ALD1712 is available in 8-pin plastic DIPs, CerDIPs, and SO packages. (From
$2.74 ea/100–stock.) Advanced Linear Devices, Inc. Sunnyvale, CA
Information 408-720-8737 Fax 408-720-8297
Hybrid power op amp delivers 2,000 Wrms output power
The PA30 power op amp is capable of 2,000 Wrms output power–up to 8,000 W
pulse–from dc to 40 kHz. The device's continuous output current is rated at
50 A, and its peak output current can exceed 100 A. Power MOSFETs are used
for the output stages to ensure no second breakdown, and on-chip temperature
sensors provide thermal protection. The amp has a typical slew rate of 45
V/μs and operates from 30 to 200-V rail-to-rail voltage ranges. The
device's external current limiting can be configured for Kelvin sensing, as
well as for multislope foldover limiting. The PA30 is packaged in a 2.80-in.
(W) x 2.20-in. (L) x 0.422-in. (H) sidelead package that provides a solid,
flat heat-sinking surface. ($1,585 ea/100–evaluation units available
stock.) Apex Microtechnology Corp. Tucson, AZ Marie Rivera 602-690-8603 Fax
602-888-3329
Op amp offers JFET/bipolar input
The OP-285 dual op amp features an input circuit that uses a mixed
bipolar/JFET design topology. The device offers a gain-bandwidth of 9 MHz, a
slew rate of 22 V/μs, and a voltage offset of only 250 microvolts. In
addition, the amp has voltage noise of 6 nV/
8-pin plastic DIPs, SO packages, and in die form. (From $1.50
ea/1,000–stock.) Analog Devices, Inc., Norwood, MA Information 617-937-1428
Fax 617-821-4273
Quad video buffer for high-performance video
The Si584 is a monolithic quad video buffer with a 200-MHz bandwidth and
output drive capability of +/-20 mA. In addition, it has a differential gain
and phase of 0.8% and 0.1 degrees, respectively. The Si584 has
third-harmonic distortion of typically -58 dBc at 20 MHz, gain flatness of
0.1 dB from dc to 30 MHz, and settling to 0.1% in 10 ns. It operates from
+/-5-V supplies and comes in 14-pin plastic DIPs and SO packages. ($10.15
ea/1,000–available now.) Siliconix Inc., Santa Clara, CA Information
800-554-5565, ext. 1900
Power op amps deliver up to 10 A
The OMA501/541/2541 power op amps operate from +/-40-V supplies and are
capable of 5- (OMA541/2541) and +/-10-A (OMA501) continuous output current.
The OMA541 has internal current limiting circuitry that can be user
programmed with a single external resistor. The OMA2541 dual op amp has
internal circuitry that limits output current to about 6 A. The OMA501 is
unity-gain stable and can be used in any op amp configuration. All the
devices are available in 8-pin isolated TO-3 packages. (From $76.90
ea/100–stock to 10 weeks.) Omnirel Corp., Leominster, MA Information
508-534-5776
Devices operate in 3-V systems
The TLV family of op amps is fully characterized and specified for operation
in 3-V systems. The TLV2322/32/42 and TLV2324/34/44 dual and quad op amps,
respectively, are available in three versions to provide a low (25
microamps), medium (250 microamps), or high (1.5 mA) bias per op amp. The
TLV2341 single op amp can be programmed for use over this same range of
currents via an external pin. The single op amp and dual op amps are
available in 8-pin plastic DIPs, SO packages, and thin small-scale-outline
packages. The quad op amps are available in 14-pin versions of the same
package styles. (From $0.54 ea/1,000–available now.) Texas Instruments
Inc., Dallas, TX Information 214-995-6611, ext. 3990
Wideband amplifiers operate without feedback
The MAX435/436 are high-speed wideband transconductance amplifiers with true
differential high-impedance inputs. The devices provide accurate gain
(+/-2.5% unadjusted) without negative feedback, which eliminates eliminates
loop-transmission phase shift. The differential-output MAX435 has a 275-MHz
bandwidth, an 800-V/μs slew rate, and a settling time of 18 ns. The
single-ended output MAX436 has the same settling time with a 200-MHz
bandwidth and an 850-V/μs slew rate. Both devices have a 53-dB CMRR at 10
MHz and noise of 7 nV/
14-pin DIPs and SO packages. ($2.75 ea/1,000–available now.) Maxim
Integrated Products Sunnyvale, CA Information 408-737-7600, ext. 6087 EEM
FILE 3130
Video op amp is low in cost
The AD817 50-MHz op amp has a 350-V/μs slew rate and uses a maximum
supply current of 7 mA. The device has a settling time of 45 ns to 0.1%, and
differential gain and phase of 0.04% and 0.08 degrees, respectively. At a
gain of +1 the AD817 is flat to within 0.1 dB to 70 MHz. The device is fully
specified for operation from single +5-V or dual +/-5 to +/-15-V supplies.
It is available in 8-pin DIPs and SO packages. (From $1.52 ea/1,000–stock.)
Analog Devices, Inc., Norwood, MA Information 617-937-1428 Fax 617-821-4273
Dual micropower op amp operates rail to rail
The ALD2711 is a dual micropower precision rail-to-rail op amp. It operates
from +/-1 to +/-6-V dual supplies as well as from +2 to +12-V
battery-operated systems. Typical supply current is 200 microamps with a 5-V
supply voltage. Each amplifier of the ALD2711 features rail-to-rail input
signal levels linear up to 350 mV beyond both the positive and negative
supply rails with no phase reversals or other adverse effects. The outputs
can swing to within 2 mV of the power supply rails when driving a
high-impedance load. The ALD2711 has a unity-gain bandwidth of 0.7 MHz and
is available in 8-lead plastic DIPs, CerDIPs, and SO packages. (ALD2711SA,
$2.54 ea/100–stock.) Advanced Linear Devices, Inc. Sunnyvale, CA
Information 408-720-8737 Fax 408-720-8297
Current-feedback amp uses little power
The LT1217 is a current-feedback op amp with a unity-gain bandwidth of
10-MHz and a slew rate of 500 V/μs. It operates on supplies from +/-5 to
+/-15 V with a typical supply current of 1 mA. dc characteristics of the
device include a maximum input offset voltage of 3 mV and a maximum input
bias current of 500 nA. Settling time is 280 ns to 0.1% for a 10-V step. The
LT1217 comes in 8-pin DIPs and SO packages. (From 3.25 ea/100–stock.)
Linear Technology Corp. Milpitas, CA Information 800-637-5545 Fax
408-434-0507
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