OPA604
OPA
604
OPA
604
SBOS019A – JANUARY 1992 – SEPTEMBER 2003
FET-Input, Low Distortion
OPERATIONAL AMPLIFIER
FEATURES
APPLICATIONS
●
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●
●
●
●
●
●
●
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LOW DISTORTION: 0.0003% at 1kHz
LOW NOISE: 10nV/√Hz
HIGH SLEW RATE: 25V/µs
WIDE GAIN-BANDWIDTH: 20MHz
UNITY-GAIN STABLE
WIDE SUPPLY RANGE: VS = ±4.5 to ±24V
PROFESSIONAL AUDIO EQUIPMENT
PCM DAC I/V CONVERTERS
SPECTRAL ANALYSIS EQUIPMENT
ACTIVE FILTERS
TRANSDUCER AMPLIFIERS
DATA ACQUISITION
● DRIVES 600Ω LOAD
● DUAL VERSION AVAILABLE (OPA2604)
(7)
V+
DESCRIPTION
The OPA604 is a FET-input operational amplifier designed
for enhanced AC performance. Very low distortion, low noise
and wide bandwidth provide superior performance in high
quality audio and other applications requiring excellent dynamic performance.
New circuit techniques and special laser trimming of dynamic
circuit performance yield very low harmonic distortion. The
result is an op amp with exceptional sound quality. The lownoise FET input of the OPA604 provides wide dynamic
range, even with high source impedance. Offset voltage is
laser-trimmed to minimize the need for interstage coupling
capacitors.
The OPA604 is available in 8-pin plastic mini-DIP and SO-8
surface-mount packages, specified for the –25°C to +85°C
temperature range.
(+)
(3)
(–)
(2)
Distortion
Rejection
Circuitry(1)
Output
Stage(1)
(6)
VO
(5)
(1)
(4)
V–
NOTE: (1) Patents Granted: #5053718, 5019789
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.
Copyright © 1992-2003, 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.
www.ti.com
ELECTROSTATIC
DISCHARGE SENSITIVITY
ABSOLUTE MAXIMUM RATINGS
Power Supply Voltage ....................................................................... ±25V
Input Voltage ............................................................... (V–)–1V to (V+)+1V
Output Short Circuit to Ground ................................................ Continuous
Operating Temperature .................................................. –40°C to +100°C
Storage Temperature ...................................................... –40°C to +125°C
Junction Temperature .................................................................... +150°C
Lead Temperature (soldering, 10s) AP .......................................... +300°C
Lead Temperature (soldering, 3s) AU ............................................ +260°C
PIN CONFIGURATION
Top View
2
DIP, SOIC
Any integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric
changes could cause the device not to meet published specifications.
Offset Trim
1
8
No Internal Connection
PACKAGE/ORDERING INFORMATION
–In
2
7
+VS
+In
3
6
Output
For the most current package and ordering information, see
to the Package Option Addendum at the end of this data
sheet.
–VS
4
5
Offset Trim
OPA604
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SBOS019A
ELECTRICAL CHARACTERISTICS
TA = +25°C, VS = ±15V, unless otherwise noted.
OPA604AP, AU
PARAMETER
OFFSET VOLTAGE
Input Offset Voltage
Average Drift
Power Supply Rejection
INPUT BIAS CURRENT(1)
Input Bias Current
Input Offset Current
CONDITION
MIN
TYP
MAX
UNITS
±5
80
±1
±8
100
mV
µV/°C
dB
VS = ±5 to ±24V
VCM = 0V
VCM = 0V
NOISE
Input Voltage Noise
Noise Density: f = 10Hz
f = 100Hz
f = 1kHz
f = 10kHz
Voltage Noise, BW = 20Hz to 20kHz
Input Bias Current Noise
Current Noise Density, f = 0.1Hz to 20kHz
INPUT VOLTAGE RANGE
Common-Mode Input Range
Common-Mode Rejection
VCM = ±12V
±12
80
INPUT IMPEDANCE
Differential
Common-Mode
OPEN-LOOP GAIN
Open-Loop Voltage Gain
FREQUENCY RESPONSE
Gain-Bandwidth Product
Slew Rate
Settling Time: 0.01%
0.1%
Total Harmonic Distortion + Noise (THD+N)
OUTPUT
Voltage Output
Current Output
Short Circuit Current
Output Resistance, Open-Loop
VO = ±10V, RL = 1kΩ
80
G = 100
20VPP, RL = 1kΩ
G = –1, 10V Step
15
G = 1, f = 1kHz
VO = 3.5Vrms, RL = 1kΩ
RL = 600Ω
VO = ±12V
POWER SUPPLY
Specified Operating Voltage
Operating Voltage Range
Current
±11
±4.5
TEMPERATURE RANGE
Specification
Storage
Thermal Resistance(2), θJA
50
±3
pA
pA
25
15
11
10
1.5
nV/√Hz
nV/√Hz
nV/√Hz
nV/√Hz
µVPP
4
fA/√Hz
±13
100
V
dB
1012 || 8
1012 || 10
Ω || pF
Ω || pF
100
dB
20
25
1.5
1
0.0003
MHz
V/µs
µs
µs
%
±12
±35
±40
25
V
mA
mA
Ω
±15
±5.3
–25
–40
±24
±7
+85
+125
90
V
V
mA
°C
°C
°C/W
NOTES: (1) Typical performance, measured fully warmed-up. (2) Soldered to circuit board—see text.
OPA604
SBOS019A
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3
TYPICAL CHARACTERISTICS
TA = +25°C, VS = ±15V, unless otherwise noted.
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
1
THD + N (%)
0.1
Measurement BW = 80kHz
See “Distortion Measurements” for description of
test method.
VO
G = 100V/V
0.01
See “Distortion Measurements”
for description of test method.
1kΩ
0.01
THD + N (%)
VO =
3.5Vrms
1kΩ
0.1
TOTAL HARMONIC DISTORTION + NOISE
vs OUTPUT VOLTAGE
f = 1kHz
Measurement BW = 80kHz
0.001
G = 10V/V
0.001
G = 1V/V
0.0001
20
100
1k
10k
0.0001
0.1
20k
1
10
100
Frequency (Hz)
Output Voltage (VPP)
OPEN-LOOP GAIN/PHASE vs FREQUENCY
INPUT VOLTAGE AND CURRENT NOISE
SPECTRAL DENSITY vs FREQUENCY
0
120
1k
1k
–90
40
–135
G
20
100
10
10
Current Noise
1
–20
10
100
1k
10k
100k
1M
1
10M
10
100
INPUT BIAS AND INPUT OFFSET CURRENT
vs TEMPERATURE
100
100
10
Input
Offset Current
–50
–25
0
25
50
75
1
100
10nA
Input Bias Current (pA)
1nA
Input
Bias Current
1nA
1
–75
1
1M
100k
INPUT BIAS AND INPUT OFFSET CURRENT
vs INPUT COMMON-MODE VOLTAGE
10nA
Input Offset Current (pA)
100nA
10
10k
Frequency (Hz)
Frequency (Hz)
10nA
1k
1nA
Input
Bias Current
1nA
100
100
10
Input
Offset Current
0.1
125
10
–15
Ambient Temperature (°C)
–10
–5
0
5
10
Input Offset Current (pA)
1
Input Bias Current (pA)
100
Voltage Noise
–180
0
4
Current Noise (fA/ Hz)
φ
60
Phase Shift (Degrees)
Voltage Gain (dB)
–45
80
Voltage Noise (nV/ Hz)
100
1
15
Common-Mode Voltage (V)
OPA604
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SBOS019A
TYPICAL CHARACTERISTICS
(Cont.)
TA = +25°C, VS = ±15V, unless otherwise noted.
COMMON-MODE REJECTION
vs COMMON-MODE VOLTAGE
INPUT BIAS CURRENT
vs TIME FROM POWER TURN-ON
120
1nA
100
Common-Mode Rejection (dB)
Input Bias Current (pA)
VS = ±24V
VS = ±15V
VS = ±5V
10
110
100
90
80
–15
1
0
1
2
3
4
5
–10
Time After Power Turn-On (min)
POWER SUPPLY AND COMMON-MODE
REJECTION vs FREQUENCY
80
80
CMR
–PSR
60
60
40
40
20
20
1k
10k
100k
10
1M
CMR
100
PSR
90
AOL
80
70
0
10M
10
5
15
20
Frequency (Hz)
Supply Voltage (±VS)
GAIN-BANDWIDTH AND SLEW RATE
vs SUPPLY VOLTAGE
GAIN-BANDWIDTH AND SLEW RATE
vs TEMPERATURE
28
15
110
AOL, PSR, CMR (dB)
100
100
5
AOL, PSR, AND CMR vs SUPPLY VOLTAGE
100
0
10
0
120
120
+PSR
Common-Mode Rejection (dB)
Power Supply Rejection (dB)
120
–5
Common-Mode Voltage (V)
25
28
33
30
29
Slew Rate
20
25
16
21
12
5
10
15
20
25
20
20
16
12
–75
17
25
Gain-Bandwidth
G = +100
–50
–25
0
15
25
50
75
100
10
125
Temperature (°C)
Supply Voltage (±VS)
OPA604
SBOS019A
24
Slew Rate (V/µs)
Gain-Bandwidth
G = +100
Gain-Bandwidth (MHz)
24
Slew Rate (V/µs)
Gain-Bandwidth (MHz)
Slew Rate
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5
TYPICAL CHARACTERISTICS
(Cont.)
TA = +25°C, VS = ±15V, unless otherwise noted.
MAXIMUM OUTPUT VOLTAGE SWING vs FREQUENCY
SETTLING TIME vs CLOSED-LOOP GAIN
30
5
VO = 10V Step
RL = 1kΩ
CL = 50pF
VS = ±15V
Output Voltage (Vp-p)
Settling Time (µs)
4
3
0.01%
2
0.1%
20
10
1
0
0
–1
–10
–100
100k
10k
–1000
1M
10M
Closed-Loop Gain (V/V)
Frequency (Hz)
SUPPLY CURRENT vs TEMPERATURE
LARGE-SIGNAL TRANSIENT RESPONSE
+10
VS = ±15V
6
Output Voltage (V)
Supply Current (mA)
7
VS = ±24V
5
VS = ±5V
4
3
−75
−50
−25
0
25
50
75
100
–10
125
5
0
10
Ambient Temperature (°C)
SMALL-SIGNAL TRANSIENT RESPONSE
SHORT-CIRCUIT CURRENT vs TEMPERATURE
Short-Circuit Current (mA)
60
Output Voltage (V)
+100
–100
ISC+ and ISC–
50
40
30
20
0
1
–75
2
–50
–25
0
25
50
75
100
125
Ambient Temperature (°C)
6
OPA604
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SBOS019A
TYPICAL CHARACTERISTICS
(Cont.)
TA = +25°C, VS = ±15V, unless otherwise noted.
MAXIMUM POWER DISSIPATION vs TEMPERATURE
POWER DISSIPATION vs SUPPLY VOLTAGE
1.4
0.5
Worst case sine
wave RL = 600Ω
0.40
0.35
Total Power Dissipation (W)
Power Dissipation (W)
0.45
Typical high-level
music RL = 600Ω
0.30
0.25
0.20
No signal
or no load
0.15
θJ-A = 90°C/W
Soldered to
Circuit Board
(see text)
1.2
1.0
0.8
0.6
Maximum
Specified Operating
Temperature
85°C
0.4
0.2
0.10
0
0.05
6
8
10
12
14
16
18
20
22
0
24
APPLICATIONS INFORMATION
OFFSET VOLTAGE ADJUSTMENT
The OPA604 offset voltage is laser-trimmed and will require
no further trim for most applications. As with most amplifiers,
externally trimming the remaining offset can change drift
performance by about 0.3µV/°C for each 100µV of adjusted
offset. The OPA604 can replace many other amplifiers by
leaving the external null circuit unconnected.
The OPA604 is unity-gain stable, making it easy to use in a
wide range of circuitry. Applications with noisy or high impedance power supply lines may require decoupling capacitors
close to the device pins. In most cases, a 1µF tantalum
capacitor at each power supply pin is adequate.
+VCC
7
2
OPA604
3
5
4
6
±50mV Typical
Trim Range
75
100
125
150
Op amp distortion can be considered an internal error source
which can be referred to the input. Figure 2 shows a circuit
which causes the op amp distortion to be 101 times greater
than normally produced by the op amp. The addition of R3 to
the otherwise standard noninverting amplifier configuration
alters the feedback factor or noise gain of the circuit. The
closed-loop gain is unchanged, but the feedback available
for error correction is reduced by a factor of 101. This
extends the measurement limit, including the effects of the
signal-source purity, by a factor of 101. Note that the input
signal and load applied to the op amp are the same as with
conventional feedback without R3.
Validity of this technique can be verified by duplicating
measurements at high gain and/or high frequency where the
distortion is within the measurement capability of the test
equipment. Measurements for this data sheet were made
with the Audio Precision System One, which greatly simplifies such repetitive measurements. The measurement technique can, however, be performed with manual distortion
measurement instruments.
CAPACITIVE LOADS
NOTE: (1) 50kΩ to 1MΩ
Trim Potentiometer
(100kΩ Recommended)
FIGURE 1. Offset Voltage Trim.
DISTORTION MEASUREMENTS
The distortion produced by the OPA604 is below the measurement limit of virtually all commercially available equipment. A special test circuit, however, can be used to extend
the measurement capabilities.
The dynamic characteristics of the OPA604 have been
optimized for commonly encountered gains, loads and operating conditions. The combination of low closed-loop gain
and capacitive load will decrease the phase margin and may
lead to gain peaking or oscillations. Load capacitance reacts
with the op amp’s open-loop output resistance to form an
additional pole in the feedback loop. Figure 3 shows various
circuits which preserve phase margin with capacitive load.
For details of analysis techniques and applications circuits,
refer to application bulletin AB-028 (SBOA015) located at
www.ti.com.
OPA604
SBOS019A
50
1
(1)
–VCC
25
Ambient Temperature (°C)
Supply Voltage, ±VS (V)
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7
For the unity-gain buffer, Figure 3a, stability is preserved by
adding a phase-lead network, RC and CC. Voltage drop
across RC will reduce output voltage swing with heavy loads.
An alternate circuit, Figure 3b, does not limit the output with
low load impedance. It provides a small amount of positive
feedback to reduce the net feedback factor. Input impedance
of this circuit falls at high frequency as op amp gain rolloff
reduces the bootstrap action on the compensation network.
Figures 3c and 3d show compensation techniques for
noninverting amplifiers. Like the follower circuits, the circuit in
Figure 3d eliminates voltage drop due to load current, but at
the penalty of somewhat reduced input impedance at high
frequency.
Figures 3e and 3f show input lead compensation networks
for inverting and difference amplifier configurations.
NOISE PERFORMANCE
Op amp noise is described by two parameters—noise voltage and noise current. The voltage noise determines the
noise performance with low source impedance. Low noise
bipolar-input op amps such as the OPA27 and OPA37
provide very low voltage noise. But if source impedance is
greater than a few thousand ohms, the current noise of
R1
bipolar-input op amps react with the source impedance and
will dominate. At a few thousand ohms source impedance
and above, the OPA604 will generally provide lower noise.
POWER DISSIPATION
The OPA604 is capable of driving a 600Ω load with powersupply voltages up to ±24V. Internal power dissipation is
increased when operating at high power supply voltage. The
typical characteristic curve, Power Dissipation vs Power
Supply Voltage, shows quiescent dissipation (no signal or no
load) as well as dissipation with a worst case continuous sine
wave. Continuous high-level music signals typically produce
dissipation significantly less than worst-case sine waves.
Copper leadframe construction used in the OPA604 improves heat dissipation compared to conventional plastic
packages. To achieve best heat dissipation, solder the device directly to the circuit board and use wide circuit board
traces.
OUTPUT CURRENT LIMIT
Output current is limited by internal circuitry to approximately
±40mA at 25°C. The limit current decreases with increasing
temperature as shown in the typical curves.
R2
SIG. DIST.
GAIN GAIN
R1
R2
R3
101
∞
5kΩ
50Ω
10
101
500Ω
5kΩ
500Ω
100
101
50Ω
5kΩ
∞
1
R3
OPA604
Generator
Output
VO = 10Vp-p
(3.5Vrms)
Analyzer
Input
Audio Precision
System One
Analyzer(1)
RL
1kΩ
IBM PC
or
Compatible
NOTE: (1) Measurement BW = 80kHz
FIGURE 2. Distortion Test Circuit.
8
OPA604
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SBOS019A
(a)
(b)
CC
820pF
RC
ei
CC
0.47µF
750Ω
CL
5000pF
CC =
eo
OPA604
eo
OPA604
R2
RC
2kΩ
10Ω
CL
5000pF
ei
120 X 10–12 CL
RC =
CC =
R2
4CL X 1010 – 1
CL X 103
RC
(c)
(d)
R1
R2
R1
R2
10kΩ
10kΩ
2kΩ
2kΩ
CC
RC
20Ω
24pF
CC
0.22µF
RC
eo
OPA604
ei
CL
5000pF
50
CL
R2
CC =
OPA604
eo
ei
25Ω
RC =
CC =
CL
5000pF
R2
2CL X 1010 – (1 + R2/R1)
CL X 103
RC
(e)
(f)
R2
R1
R2
2kΩ
2kΩ
e1
2kΩ
R1
RC
20Ω
ei
2kΩ
eo
OPA604
RC
20Ω
OPA604
CC
0.22µF
CL
5000pF
CC
0.22µF
R3
R4
2kΩ
2kΩ
eo
CL
5000pF
e2
RC =
R2
2CL X 1010 – (1 + R2/R1)
RC =
CC =
103
CL X
RC
CC =
R2
2CL X 1010 – (1 + R2/R1)
CL X 103
RC
NOTE: Design equations and component values are approximate. User adjustment is required for optimum performance.
FIGURE 3. Driving Large Capacitive Loads.
OPA604
SBOS019A
www.ti.com
9
R4
22kΩ
C3
R1
R2
100pF
R3
VIN
2.7kΩ
22kΩ
C1
3000pF
OPA604
10kΩ
VO
C2
2000pF
fp = 20kHz
FIGURE 4. Three-Pole Low-Pass Filter.
R1
R5
OPA604
VO
VIN
6.04kΩ
2kΩ
R2
4.02kΩ
R2
4.02kΩ
C3
1000pF
1
Low-pass
3-pole Butterworth
f–3dB = 40kHz
2
OPA2604
1
2
OPA2604
C1
1000pF
R4
5.36kΩ
See Application Bulletin AB-026
for information on GIC filters.
C2
1000pF
FIGURE 5. Three-Pole Generalized Immittance Converter (GIC) Low-Pass Filter.
1
7.87kΩ
2
10kΩ
10kΩ
OPA2604
–
VIN
100pF
OPA604
VO
G=1
+
1
7.87kΩ
100kHz Input Filter
2
OPA2604
10kΩ
10kΩ
FIGURE 6. Differential Amplifier with Low-Pass Filter.
10
OPA604
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SBOS019A
100Ω
10kΩ
NOTE: (1) C1 ≈
COUT
2π Rf fc
RF = Internal feedback resistance = 1.5kΩ
fC = Crossover frequency = 8MHz
G = 101
(40dB)
10
OPA604
5
PCM63
20-bit
6
D/A
Converter 9
Piezoelectric
Transducer
1MΩ(1)
C1(1)
OPA604
VO = ±3Vp
To low-pass
filter.
NOTE: (1) Provides input
bias current return path.
FIGURE 7. High Impedance Amplifier.
FIGURE 8. Digital Audio DAC I-V Amplifier.
OPA604
A2
I2
R4
OPA604
R3
51Ω
51Ω
A1
VIN
IL = I1 + I2
R2
I1
VOUT
Load
R1
VOUT = VIN (1+R2/R1)
FIGURE 9. Using Two OPA604 Op Amps to Double the Output Current to a Load.
OPA604
SBOS019A
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11
SOUND QUALITY
The following discussion is provided, recognizing that
not all measured performance behavior explains or
correlates with listening tests by audio experts. The
design of the OPA604 included consideration of both
objective performance measurements, as well as an
awareness of widely held theory on the success and
failure of previous op amp designs.
I1
800µA
R2
75Ω
R1
75Ω
R5
500Ω
J1
J2
J3
1
VBE = 1kHz + DC Bias
FFT
IC
VO
IC
V
(mA) BE
0
1
0.65
VBE (V)
0
3fO
4fO
1 2 3 4
Frequency (kHz)
5fO
5
VGS
–ID
(mA)
log
(VO)
VO
ID
fO
0
1
0
VGS (V)
0
2fO
3fO
4fO
1 2 3 4
Frequency (kHz)
Q1
Q3
Output
Stage
Q2
Q4
R11
10kΩ
R3
1kΩ
R4
1kΩ
R8
3kΩ
R9
3kΩ
THE OPA604 DESIGN
The OPA604 uses FETs throughout the signal path,
including the input stage, input-stage load, and the
important phase-splitting section of the output stage.
Bipolar transistors are used where their attributes,
such as current capability are important, and where
their transfer characteristics have minimal impact.
The topology consists of a single folded-cascode gain
stage followed by a unity-gain output stage. Differential input transistors J1 and J2 are special large-geometry, P-channel JFETs. Input stage current is a relatively high 800µA, providing high transconductance
and reducing voltage noise. Laser trimming of stage
currents and careful attention to symmetry yields a
nearly symmetrical slew rate of ±25V/µs.
The drains of J1 and J2 are cascoded by Q1 and Q2,
driving the input stage loads, FETs J3 and J4. Distortion reduction circuitry (patented) linearizes the openloop response and increases voltage gain. The 20MHz
bandwidth of the OPA604 further reduces distortion
through the user-connected feedback loop.
VGS = 1kHz + DC Bias
FFT
1
2fO
R10
10kΩ
J5
The JFET input stage holds input bias current to
approximately 50pA or roughly 3000 times lower than
common bipolar-input audio op amps. This dramatically reduces noise with high-impedance circuitry.
log
(VO)
fO
0
J4
Distortion
Rejection
Circuitry
SOUND QUALITY
Many audio experts believe that the sound quality of a
high performance FET op amp is superior to that of
bipolar op amps. A possible reason for this is that
bipolar designs generate greater odd-order harmonics
than FETs. To the human ear, odd-order harmonics
have long been identified as sounding more unpleasant than even-order harmonics. FETs, like vacuum
tubes, have a square-law I-V transfer function which is
more linear than the exponential transfer function of a
bipolar transistor. As a direct result of this square-law
characteristic, FETs produce predominantly even-order harmonics. Figure 10 shows the transfer function of
a bipolar transistor and FET. Fourier transformation of
both transfer functions reveals the lower odd-order
harmonics of the FET amplifier stage.
200µA
R7
4kΩ
(+)
(–)
The sound quality of an op amp is often the crucial
selection criteria—even when a data sheet claims
exceptional distortion performance. By its nature, sound
quality is subjective. Furthermore, results of listening
tests can vary depending on application and circuit
configuration. Even experienced listeners in controlled
tests often reach different conclusions.
I2
R6
500Ω
The output stage consists of a JFET phase-splitter
loaded into high speed all-NPN output drivers. Output
transistors are biased by a special circuit to prevent
cutoff, even with full output swing into 600Ω loads.
5fO
5
FIGURE 10. I-V and Spectral Response of NPN and
JFET.
12
OPA604
www.ti.com
SBOS019A
PACKAGE OPTION ADDENDUM
www.ti.com
27-Sep-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
OPA604AU
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-3-260C-168 HR
-40 to 85
OPA
604AU
Samples
OPA604AU/2K5
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-3-260C-168 HR
-40 to 85
OPA
604AU
Samples
OPA604AU/2K5G4
ACTIVE
SOIC
D
8
2500
RoHS & Green
NIPDAU
Level-3-260C-168 HR
-40 to 85
OPA
604AU
Samples
OPA604AUE4
ACTIVE
SOIC
D
8
75
RoHS & Green
NIPDAU
Level-3-260C-168 HR
-40 to 85
OPA
604AU
Samples
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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