Datasheet OP467 Datasheet (Analog Devices)

Page 1
Quad Precision, High Speed
1
2
3
4
5
6
7
8
OUT A
–IN A
+IN A
V+
+IN B
–IN B
OUT B
16
15
14
13
12
11
10
9
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
NC
NC
OP467
NC = NO CONNECT
a
FEATURES High Slew Rate – 170 V/␮s Wide Bandwidth – 28 MHz Fast Settling Time – <200 ns to 0.01% Low Offset Voltage – <500 ␮V Unity-Gain Stable Low Voltage Operation 5 V to 15 V Low Supply Current – <10 mA Drives Capacitive Loads
APPLICATIONS High Speed Image Display Drivers High Frequency Active Filters Fast Instrumentation Amplifiers High Speed Detectors Integrators Photo Diode Preamps

GENERAL DESCRIPTION

The OP467 is a quad, high speed, precision operational ampli­fier. It offers the performance of a high speed op amp combined with the advantages of a precision operational amplifier all in a single package. The OP467 is an ideal choice for applications where, traditionally, more than one op amp was used to achieve this level of speed and precision.
The OP467’s internal compensation ensures stable unity-gain operation, and it can drive large capacitive loads without oscilla­tion. With a gain bandwidth product of 28 MHz driving a 30 pF load, output slew rate in excess of 170 V/µs, and settling time to 0.01% in less than 200 ns, the OP467 provides excellent dynamic accuracy in high speed data-acquisition systems. The channel-to-channel separation is typically 60 dB at 10 MHz.
The dc performance of OP467 includes less than 0.5 mV of offset, voltage noise density below 6 nV/Hz, and total supply current under 10 mA. Common-mode rejection and power supply rejection ratios are typically 85 dB. PSRR is maintained to better than 40 dB with input frequencies as high as 1 MHz. The low offset and drift plus high speed and low noise make the OP467 usable in applications such as high speed detectors and instrumentation.
The OP467 is specified for operation from ±5 V to ±15 V over the extended industrial temperature range (–40°C to +85°C) and is available in 14-lead plastic and ceramic DIP, and 16-lead SOIC and 20-terminal LCC surface-mount packages.
Contact your local sales office for MIL-STD-883 data sheet and availability.
16-Lead SOIC
(S Suffix)
–IN
Operational Amplifier
OP467

PIN CONNECTIONS

14-Lead Ceramic DIP (Y Suffix) and
14-Lead Plastic DIP (P Suffix)
OUT A
–IN A
+IN A
+IN B
–IN B
OUT B
1
2
+ +
3
4
OP467
5
++
6
7
+IN
14
OUT D
13
–IN D
+IN D
12
11
V–
10
+IN C
9
–IN C
8
OUT C
20-Terminal LCC
(RC Suffix)
–IN A
3
+IN A
4
NC
5
V+
NC
+IN B
OP467
6
(TOP VIEW)
7
8
9
10 11
–IN B
NC = NO CONNECT
OUT A
OUT B
NC
NC
OUT D
2012
12 13
OUT C
19
–IN D
–IN C
+IN D
18
NC
17
16
V–
NC
15
14
+IN C
OUT
V–
REV. E
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.
Figure 1. Simplified Schematic
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © 2004 Analog Devices, Inc. All rights reserved.
Page 2
OP467–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
(@ VS = 15.0 V, TA = 25C unless otherwise noted.)
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage V
Input Bias Current I
Input Offset Current I
OS
B
OS
Common-Mode Rejection CMR V
CMR V
Large Signal Voltage Gain A
Offset Voltage Drift ∆V Bias Current Drift ∆I
VO
/T 3.5 µV/°C
OS
/T 0.2 pA/°C
B
–40°C T
+85°C1mV
A
VCM = 0 V 150 600 nA
= 0 V, –40°C TA +85°C 150 700 nA
V
CM
VCM = 0 V 10 100 nA V
= 0 V, –40°C TA +85°C10150 nA
CM
= ±12 V 80 90 dB
CM
= ±12 V, –40°C TA +85°C8088 dB
CM
RL = 2 k 83 86 dB
= 2 k, –40°C TA +85°C77.5 dB
R
L
0.2 0.5 mV
Long-Term Offset Voltage Drift ∆VOS/TNote 1 750 µV
OUTPUT CHARACTERISTICS
Output Voltage Swing V
O
RL = 2 kΩ±13.0 ±13.5 V RL = 2 k, –40°C TA +85°C ±12.9 ± 13.12 V
POWER SUPPLY
2
Power Supply Rejection Ratio PSRR ± 4.5 V ≤ VS = ±18 V 96 120 dB
+85°C86115 dB
A
±4.5 ± 18 V
Supply Current I
Supply Voltage Range V
SY
–40°C T VO = 0 V 8 10 mA
= 0 V, –40°C TA +85°C13mA
V
O
S
DYNAMIC PERFORMANCE
Gain Bandwidth Product GBP AV = +1, CL = 30 pF 28 MHz Slew Rate SR V
Full-Power Bandwidth BW Settling Time t Phase Margin θ
ρ
S
0
= 10 V Step, RL = 2 k, CL = 30 pF
IN
A
= +1 125 170 V/µs
V
= –1 350 V/µs
A
V
VIN = 10 V Step 2.7 MHz To 0.01%, VIN = 10 V Step 200 ns
45 Degrees Input Capacitance Common Mode 2.0 pF Differential 1.0 pF
NOISE PERFORMANCE
Voltage Noise eN p-p f = 0.1 Hz to 10 Hz 0.15 µV p-p Voltage Noise Density e Current Noise Density i
NOTES
1
Long-Term Offset Voltage Drift is guaranteed by 1000 hrs. Life test performed on three independent wafer lots at 125 °C, with an LTPD of 1.3.
2
For proper operation the positive supply must be sequenced ON before the negative supply.
Specifications subject to change without notice.
N
N
f = 1 kHz 6 nV/Hz f = 1 kHz 8 pA/Hz
–2–
REV. E
Page 3
OP467

ELECTRICAL CHARACTERISTICS

(@ VS = 5.0 V, TA = 25C unless otherwise noted.)
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage V
Input Bias Current I
Input Offset Current I
OS
B
OS
Common-Mode Rejection CMR V
CMR V
Large Signal Voltage Gain A
Offset Voltage Drift ∆V
VO
/T3 5µV/°C
OS
–40°C T
+85°C1mV
A
VCM = 0 V 125 600 nA
= 0 V, –40°C TA +85°C 150 700 nA
V
CM
VCM = 0 V 20 100 nA V
= 0 V, –40°C TA +85°C 150 nA
CM
= ±2.0 V 76 85 dB
CM
= ±2.0 V, –40°C TA +85°C76 80 dB
CM
RL = 2 k 80 83 dB
= 2 k, –40°C TA +85°C74 dB
R
L
0.3 0.5 mV
Bias Current Drift ∆IB/T 0.2 pA/°C
OUTPUT CHARACTERISTICS
Output Voltage Swing V
O
RL = 2 kΩ±3.0 ±3.5 V RL = 2 k, –40°C TA +85°C ±3.0 ± 3.20 V
POWER SUPPLY
Power Supply Rejection Ratio PSRR ±4.5 V ≤ VS = ±5.5 V 92 107 dB
+85°C83105 dB
A
Supply Current I
SY
–40°C T VO = 0 V 8 10 mA VO = 0 V, –40°C TA +85°C12mA
DYNAMIC PERFORMANCE
Gain Bandwidth Product GBP A Slew Rate SR V
Full-Power Bandwidth BW Settling Time t Phase Margin θ
ρ
S
0
= +1 22 MHz
V
= 5 V Step, RL = 2 k, CL = 39 pF
IN
= +1 90 V/µs
A
V
= –1 90 V/µs
A
V
VIN = 5 V Step 2.5 MHz To 0.01%, VIN = 5 V Step 280 ns
45 Degrees
NOISE PERFORMANCE
Voltage Noise eN p-p f = 0.1 Hz to 10 Hz 0.15 µV p-p Voltage Noise Density e Current Noise Density i
Specifications subject to change without notice.
N
N
f = 1 kHz 7 nV/Hz f = 1 kHz 8 pA/Hz
REV. E
–3–
Page 4
OP467

WAFER TEST LIMITS

1
(@ VS = 15.0 V, TA = 25C unless otherwise noted.)
Parameter Symbol Conditions Limit Unit
Offset Voltage V Input Bias Current I Input Offset Current I Input Voltage Range
2
OS
B
OS
Common-Mode Rejection Ratio CMRR V
VCM = 0 V 600 nA max VCM = 0 V 100 nA max
= ±12 V 80 dB min
CM
±0.5 mV max
±12 V min/max
Power Supply Rejection Ratio PSRR V = ±4.5 V to ±18 V 96 dB min Large Signal Voltage Gain A Output Voltage Range V Supply Current I
NOTES
1
Electrical tests and wafer probe to the limits shown. Due to variations in assembly methods and normal yield loss, yield after packaging is not guaranteed for standard product dice. Consult factory to negotiate specifications based on dice lot qualifications through sample lot assembly and testing.
2
Guaranteed by CMR test.

ABSOLUTE MAXIMUM RATINGS

Supply Voltage2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18 V
Input Voltage Differential Input Voltage
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18 V
3
. . . . . . . . . . . . . . . . . . . . . . ±26 V
1
VO
O
SY
Output Short-Circuit Duration . . . . . . . . . . . . . . . . . . Limited
Storage Temperature Range
Y, RC Packages . . . . . . . . . . . . . . . . . . . . –65°C to +175°C
P, S Packages . . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Operating Temperature Range
OP467A . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to +125°C
RL = 2 k 83 dB min RL = 2 kΩ±13.0 V min VO = 0 V, RL = 10 mA max

ORDERING GUIDE

Temperature Package Package
Model Ranges Descriptions Options
OP467ARC/883C –55°C to +125°C20-Terminal LCC RC-Suffix (E-20A) OP467AY/883C –55°C to +125°C 14-Lead Cerdip Y-Suffix (Q-14) OP467GBC DIE OP467GP –40°C to +85°C 14-Lead PDIP P-Suffix (N-14) OP467GS –40°C to +85°C 16-Lead SOIC S-Suffix (RW-16) OP467GS-REEL –40°C to +85°C 16-Lead SOIC S-Suffix (RW-16)
OP467G . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C
Junction Temperature Range
Y, RC Packages . . . . . . . . . . . . . . . . . . . . –65°C to +175°C

DICE CHARACTERISTICS

P, S Packages . . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Lead Temperature Range (Soldering, 60 sec) . . . . . . . . 300°C
Package Type
4
A
JC
Unit
14-Lead Cerdip (Y) 94 10 °C/W 14-Lead PDIP (P) 76 33 °C/W 16-Lead SOIC (S) 88 23 °C/W 20-Terminal LCC (RC) 78 33 °C/W
NOTES
1
Absolute maximum ratings apply to both DICE and packaged parts, unless
otherwise noted.
2
For proper operation the positive supply must be sequenced ON before the
negative supply.
3
For supply voltages less than ± 18 V, the absolute maximum input voltage is equal
to the supply voltage.
4
θJA is specified for the worst-case conditions, i.e., θJA is specified for device in socket
for cerdip, P-DIP, and LCC packages; θJA is specified for device soldered in circuit board for SOIC package.
OP467 Die Size 0.111 ⫻ 0.100 inch, 11,100 sq. mils Sub­strate is Connected to V+, Number of Transistors 165
–4–
REV. E
Page 5
Typical Performance Characteristics–
0.0
100k 1M 10M
–0.1
–0.2
–0.3
0.1
0.2
0.3
GAIN ERROR – dB
FREQUENCY – Hz
3.4
5.8
VS = 5V
VS = 15V
OP467
80
70
60
50
40
30
20
10
OPEN-LOOP GAIN – dB
0
–10
–20
1k 10k 100M10M1M100k
GAIN
PHASE
FREQUENCY – Hz
TPC 1. Open-Loop Gain, Phase vs. Frequency
80
60
40
VS = ⴞ15V R
= 1M
L
= 30pF
C
L
VS = 15V
= 25ⴗC
T
A
–90
–135
PHASE SHIFT – Degrees
–180
100
VS = 15V
= 25ⴗC
T
A
80
60
A
= +100
VCL
40
IMPEDANCE –
20
0
1k 100k10k100
FREQUENCY – Hz
A
= +10
VCL
A
= +1
VCL
1M
TPC 4. Closed-Loop Output Impedance vs. Frequency
20
CLOSED-LOOP GAIN – dB
0
–20
100k 100M10M1M10k
FREQUENCY – Hz
TPC 2. Closed-Loop Gain vs. Frequency
25
20
15
TA = +125ⴗC
= +25ⴗC
T
A
10
= –55ⴗC
T
A
OPEN-LOOP GAIN – V/mV
5
0
0
5
SUPPLY VOLTAGE – Volts
TPC 3. Open-Loop Gain vs. Supply Voltage
TPC 5. Gain Linearity vs. Frequency
30
25
20
15
1510
20
10
VS = 15V
MAXIMUM OUTPUT SWING – Volts
= 25ⴗC
T
5
A
= 2k
R
L
0
TPC 6. Max V
10k 10M1M100k1k
FREQUENCY – Hz
Swing vs. Frequency
OUT
A
VCL
= +1
A
= –1
VCL
REV. E
–5–
Page 6
OP467
60
0
1600
30
10
200
20
0
50
40
14001000800600 1200400
LOAD CAPACITANCE – pF
OVERSHOOT – %
VS = 5V R
L
= 2k
VIN = 100mV p-p
A
VCL
= +1
A
VCL
= –1
12
VS = 5V T
= 25ⴗC
A
R
= 2k
10
L
8
6
4
MAXIMUM OUTPUT SWING – Volts
2
0
10k 10M1M100k1k
TPC 7. Max V
120
100
80
60
A
= +1
VCL
A
= –1
VCL
FREQUENCY – Hz
Swing vs. Frequency
OUT
VS = 15V T
= 25C
A
60
VS = ⴞ15V RL = 2k
VIN = 100mV p-p
50
40
30
OVERSHOOT – %
20
A
= +1
VCL
A
= –1
VCL
10
0
200
0
LOAD CAPACITANCE – pF
1600
14001000800600 1200400
TPC 10. Small Signal Overshoot vs. Load Capacitance
40
20
COMMON-MODE REJECTION – Volts
0
10k 10M1M100k1k
FREQUENCY – Hz
TPC 8. Common-Mode Rejection vs. Frequency
120
100
80
60
40
POWER SUPPLY REJECTION – dB
20
0
1k 1M100k10k100
FREQUENCY – Hz
VS = 15V T
= 25C
A
TPC 9. Power-Supply Rejection vs. Frequency
TPC 11. Small Signal Overshoot vs. Load Capacitance
60
VS = 15V
50
40
30
10000pF
1000pF
500pF
200pF
20
10
GAIN – dB
0
–10
–20
–30
–40
10k 100M10M1M100k
CIN = NETWORK
ANALYZER
FREQUENCY – Hz
TPC 12. Noninverting Gain vs. Capacitive Loads
–6–
REV. E
Page 7
OP467
0
VS = 15V
–10
–20
–30
–40
–50
–60
–70
CHANNEL SEPARATION – dB
–80
–90
–100
100 1k 100M10M1M100k10k
FREQUENCY – Hz
TPC 13. Channel Separation vs. Frequency
12
5V < VS < 15V
10
8
6
4
2
INPUT CURRENT NOISE DENSITY – pA/ Hz
0
FREQUENCY – Hz
10011k10
TPC 14. Input Current Noise Density vs. Frequency
4
VS = 15V
= 5V
V
3
IN
= 50pF
C
L
2
1
0
ERROR – mV
–1
OUT
V
–2
–3
–4
0
TIME – ns
TPC 16. Settling Time, Negative Edge
4
3
2
1
0
ERROR – mV
–1
OUT
V
–2
–3
–4
0
TIME – ns
TPC 17. Settling Time, Positive Edge
400300200100
VS = 15V
= 5V
V
IN
= 50pF
C
L
400300200100
500
500
REV. E
100
10
nV/ Hz
1.0
0.1 1 10k1k10010 FREQUENCY – Hz
TPC 15. Voltage Noise Density vs. Frequency
–7–
20
TA = 25ⴗC
15
10
5
0
–5
–10
INPUT VOLTAGE RANGE – Volts
–15
–20
SUPPLY VOLTAGE – Volts
1510
2050
TPC 18. Input Voltage Range vs. Supply Voltage
Page 8
OP467
50
VS1 = 15V
40
VS2 = 5V
= 10k
R
L
30
= 50pF
C
L
20
10
0
GAIN – dB
–10
–20
–30
–40
–50
100k 100M10M1M10k
FREQUENCY – Hz
VS2 = 5V
VS1 = 15V
TPC 19. Noninverting Gain vs. Supply Voltage
14
VS = 15V
= 25ⴗC
T
A
12
10
8
6
4
OUTPUT SWING – Volts
2
POSITIVE
SWING
NEGATIVE SWING
500
VS = ⴞ15V T
= 25ⴗC
A
1252 OP AMPS
400
300
UNITS
200
100
0
–50
–100
INPUT OFFSET VOLTAGE – VOS V
TPC 22. Input Offset Voltage Distribution
500
VS = 5V T
= 25C
A
1252 OP AMPS
400
300
UNITS
200
100
400
350300250200150100500
0
100 10k1k10
LOAD RESISTANCE –
TPC 20. Output Swing vs. Load Resistance
5
VS = 5V
= 25ⴗC
T
A
4
3
2
OUTPUT SWING – Volts
1
0
POSITIVE
SWING
NEGATIVE SWING
100 10k1k10 LOAD RESISTANCE –
TPC 21. Output Swing vs. Load Resistance
0
–50
–100
INPUT OFFSET VOLTAGE – VOS V
TPC 23. Input Offset Voltage Distribution
500
VS = ⴞ15V T
= 25C
A
1252 OP AMPS
400
300
UNITS
200
100
0
0.5
0
TC VOS – V/C
TPC 24. TC VOS Distribution
350300250200150100500
400
5.0
4.54.03.53.02.52.01.51.0
–8–
REV. E
Page 9
400
0
125
100
50
–50–75
200
150
250
300
350
1007550250–25
TEMPERATURE – ⴗC
SLEW RATE – V/␮s
–SR
+SR
VS = 5V R
L
= 2k
A
VCL
= +1
400
0
125
100
50
–50–75
200
150
250
300
350
1007550250–25
TEMPERATURE – ⴗC
SLEW RATE – V/␮s
VS = 15V R
L
= 2k
A
VCL
= +1
+SR
–SR
500
400
300
UNITS
200
100
VS = 5V T
= 25C
A
1252 OP AMPS
OP467
0
0.5
0
TC VOS – V/C
5.0
4.54.03.53.02.52.01.51.0
TPC 25. TC VOS Distribution
60
VS = ⴞ15V
55
= 2k
R
L
50
45
PHASE MARGIN – Degrees
40
–50
–75 125
TEMPERATURE – ⴗC
GBW
M
75 10050250–25
TPC 26. Phase Margin and Gain Bandwidth vs. Temperature
29.0
28.5
28.0
SLEW RATE – V/␮s
27.5
27.0
GAIN BANDWIDTH PRODUCT – MHz
TPC 28. Slew Rate vs. Temperature
650
VS = 15V
= 2k
R
600
550
500
450
400
350
300
250
L
= –1
A
VCL
–50–75
TEMPERATURE – ⴗC
–SR
+SR
TPC 29. Slew Rate vs. Temperature
1007550250–25
125
400
VS = 5V
= 2k
R
L
350
300
250
200
150
SLEW RATE – V/␮s
REV. E
100
50
= –1
A
VCL
–SR
+SR
0
–50–75
TPC 27. Slew Rate vs. Temperature
TEMPERATURE – ⴗC
125
1007550250–25
TPC 30. Slew Rate vs. Temperature
–9–
Page 10
OP467
OUTPUT STEP FOR 15V SUPPLY – Volts
–10
10
10
RF = 5k
= 25ⴗC
T
8
A
6
4
2
0
–2
–4
–6
–8
0
0.1%
100
SETTLING TIME – ns
0.01%
0.1% 0.01%
300200
TPC 31. Settling Time vs. Output Step
TA = +125ⴗC
8
= +25ⴗC
T
A
T
= –55ⴗC
A
6
400
5
4
3
2
1
0
–5
–4
–3
–2
–1
OUTPUT STEP FOR 5V SUPPLY – Volts
200
VS = 15V
160
120
80
INPUT BIAS CURRENT – nA
40
0
–50
–75
TEMPERATURE –
C
1007550250–25
TPC 33. Input Bias Current vs. Temperature
25
VS = 15V
20
15
125
4
SUPPLY CURRENT – mA
2
0
0
5
SUPPLY VOLTAGE – Volts
15ⴞ10
TPC 32. Supply Current vs. Supply Voltage
20
10
INPUT OFFSET CURRENT – nA
5
0
–50
–75
TEMPERATURE –
C
1007550250–25
TPC 34. Input Offset Current vs. Temperature
125
–10–
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OP467

APPLICATIONS INFORMATION

Output Short-Circuit Performance

To achieve a wide bandwidth and high slew rate, the OP467 output is not short-circuit protected. Shorting the output to ground or to the supplies may destroy the device.
For safe operation, the output load current should be limited so that the junction temperature does not exceed the absolute maximum junction temperature.
To calculate the maximum internal power dissipation, the fol­lowing formula can be used:
TT
max
J
P
=
D
A
θ
A
J
where TJ and TA are junction and ambient temperatures, respec­tively, P
is device internal power dissipation, and θJA is pack-
D
aged device thermal resistance given in the data sheet.

Unused Amplifiers

It is recommended that any unused amplifiers in a quad package be connected as a unity-gain follower with a 1 kfeedback resistor with noninverting input tied to the ground plain.

Printed Circuit Board Layout Considerations

Satisfactory performance of a high speed op amp largely depends on a good PC layout. To achieve the best dynamic performance, following high frequency layout technique is recommended.

Grounding

A good ground plain is essential to achieve the optimum perfor­mance in high speed applications. It can significantly reduce the undesirable effects of ground loops and IR drops by providing a low impedance reference point. Best results are obtained with a multilayer board design with one layer assigned to ground plain. To maintain a continuous and low impedance ground, avoid running any traces on this layer.

Power Supply Considerations

For proper operation the positive supply must be sequenced ON before the negative supply. All users should take steps to ensure this. In high frequency circuits, device lead length introduces an inductance in series with the circuit. This inductance, combined with stray capacitance, forms a high frequency resonance circuit. Poles generated by these circuits will cause gain peaking and additional phase shift, reducing the op amp’s phase margin and leading to an unstable operation.
A practical solution to this problem is to reduce the resonance frequency low enough to take advantage of the amplifier’s power supply rejection.
This is easily done by placing capacitors across the supply line and the ground plain as close as possible to the device pin. Since capacitors also have internal parasitic components, such as stray inductance, selecting the right capacitor is important. To be effective, they should have low impedance over the frequency range of interest. Tantalum capacitors are an excellent choice for their high capacitance/size ratio, but their ESR (effective series resistance) increases with frequency making them less
effective. On the other hand, ceramic chip capacitors have excel­lent ESR and ESL (effective series inductance) performance at higher frequencies, and because of their small size, they can be placed very close to the device pin, further reducing the stray inductance. Best results are achieved by using a combination of these two capacitors. A 5 µF–10 µF tantalum parallel with a
0.1 µF ceramic chip cap is recommended. If additional isolation from high frequency resonances of the power supply is needed, a ferrite bead should be placed in series with the supply lines between the bypass caps and the power supply. A word of caution: addition of the ferrite bead will introduce a new pole and zero to frequency response of the circuit and could cause unstable operation if it is not selected properly.
+V
S
+
10F TANTALUM
0.1F CERAMIC CHIP
0.1F CERAMIC CHIP
10F TANTALUM
–V
S
Figure 2. Recommended Power Supply Bypass

Signal Considerations

Input and output traces need special attention to assure a mini­mum stray capacitance. Input nodes are very sensitive to capaci­tive reactance, particularly when connected to a high impedance circuit. Stray capacitance can inject undesirable signals from a noisy line into a high impedance input. Protect high impedance input traces by providing guard traces around them. This will also improve the channel separation significantly.
Additionally, any stray capacitance in parallel with the op amp’s input capacitance generates a pole in the frequency response of the circuit. The additional phase shift caused by this pole will reduce the circuit’s gain margin. If this pole is within the gain range of the op amp, it will cause unstable performance. To reduce these undesirable effects, use the lowest impedance where pos­sible. Lowering the impedance at this node places the poles at a higher frequency, far above the gain range of the amplifier. Stray capacitance on the PC board can be reduced by making the traces narrow and as short as possible. Further reduction can be realized by choosing smaller pad size, increasing the spacing between the traces, and using PC board material with a low dielectric constant insulator (dielectric constant of some com­mon insulators: air = 1, Teflon
®
= 2.2, and FR4 = 4.7; with air
being an ideal insulator).
Removing segments of the ground plain directly under the input and output pads is recommended.
Outputs of high speed amplifiers are very sensitive to capacitive loads. A capacitive load will introduce a pair of pole and zero to the circuit’s frequency response, reducing the phase margin, leading to unstable operation or oscillation.
REV. E
–11–
Page 12
OP467
Generally, it is good design practice to isolate the amplifier’s output from any capacitive load by placing a resistor between the amplifier’s output and the rest of the circuits. A series resis­tor of 10 to 100 is normally sufficient to isolate the output from a capacitive load.
The OP467 is internally compensated to provide stable opera­tion, and is capable of driving large capacitive loads without oscillation.
Sockets are not recommended since they increase the lead inductance/capacitance and reduce the power dissipation of the package by increasing the leads’ thermal resistance. If sockets must be used, use Teflon or pin sockets with the shortest possible leads.

Phase Reversal

The OP467 is immune to phase reversal; its inputs can exceed the supply rails by a diode drop without any phase reversal.
15.8V
V1
100
90
OUTPUT
10
INPUT
0%
10V 10V
200␮s
DLY 4.806␮s
100
90
10
0%
5V
5V
20ns
Figure 5. Saturation Recovery Time, Negative Rail

High Speed Instrumentation Amplifier

The OP467 performance lends itself to a variety of high speed applications, including high speed precision instrumentation amplifiers. Figure 6 represents a circuit commonly used for data acquisition, CCD imaging, and other high speed applications.
Circuit gain is set by R to 2; for unity gain, remove R
. A 2 kresistor will set the circuit gain
G
. For any other gain settings use
G
the following formula:
G = 2/R
R
is used for adjusting the dc common-mode rejection, and C
C
Resistor Value is in k
G
C
is used for ac common-mode rejection adjustments.
–V
IN
C
C
Figure 3. No Phase Reversal (AV = +1)

Saturation Recovery Time

The OP467 has a fast and symmetrical recovery time from either rail. This feature is very useful in applications such as high speed instrumentation and measurement circuits, where the amplifier is frequently exposed to large signals that overload the amplifier.
DLY 9.842␮s
100
90
10
0%
5V
5V
20ns
Figure 4. Saturation Recovery Time, Positive Rail
1.9k
R
C
200 10T
2k
OUTPUT
1k
10k
R
G
1k
10k
+V
IN
2k
2k
5pF
Figure 6. A High Speed Instrumentation Amplifier
0.01% 10V STEP = 15V
V
S
NEG SLOPE
2.5mV
–2.5mV
Figure 7. Instrumentation Amplifier Settling Time to
0.01% for a 10 V Step Input (Negative Slope)
–12–
REV. E
Page 13
OP467
0.01% 10V STEP = 15V
V
S
POS SLOPE
2.5mV
–2.5mV
Figure 8. Instrumentation Amplifier Settling Time to
0.01% for a 10 V Step Input (Positive Slope)
+V
S
+
–V
+
AD9617
S
549
1k
ERROR TO SCOPE
INPUT
TO
IN-AMP
OUTPUT
TO
2k
2k
61.9

2 MHz Biquad Bandpass Filter

The circuit in Figure 10 is commonly used in medical imaging ultrasound receivers. The 30 MHz bandwidth is sufficient to accurately produce the 2 MHz center frequency, as the measured response shows in Figure 11. When the op amp’s bandwidth is too close to the filter’s center frequency, the amplifier’s internal phase shift causes excess phase shift at 2 MHz, which alters the filter’s response. In fact, if the chosen op amp has a bandwidth close to 2 MHz, the combined phase shift of the three op amps will cause the loop to oscillate.
Careful consideration must be given to the layout of this circuit as with any other high speed circuit.
If the phase shift introduced by the layout is large enough, it could alter the circuit performance, or worse, it will oscillate.
R6
1k
C1
50pF
2k
1/4
OP467
V
R1
3k
+
IN
1/4
OP467
+
R2
2k
R3
2k
V
OUT
R4
2k
1/4
OP467 +
R5
2k
C2
50pF
1/4
OP467
+
Figure 9. Settling Time Measurement Circuit
Figure 10. 2 MHz Biquad Filter
0
–10
–20
GAIN – dB
–30
–40
100k 100M10M1M10k
FREQUENCY – Hz
Figure 11. Biquad Filter Response
REV. E
–13–
Page 14
OP467
+5V
V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
DD
DAC8408
V
A
REF
R
A
FB
I
1A
OUT
2A/
I
OUT
I
2B
OUT
1B
I
OUT
B
R
FB
B
V
REF
DB0 (LSB)
DB1
DB2
DB3
DB4
DB5
(MSB) DB7
+10V
C1
V
A
OUT
0.1␮F
V
B
OUT
0.1␮F
1
7
OP467
+15V
4
OP467
11
–15V
3
+
6
5
+
2
10pF
C2 10pF
+10V
Figure 12. Quad DAC Unipolar Operation

Fast I-To-V Converter

The fast slew rate and fast settling time of the OP467 are well suited to the fast buffers and I-to-V converters used in a variety of applications. The circuit in Figure 12 is a unipolar quad DAC consisting of only two ICs. The current output of the DAC8408 is converted to a voltage by the OP467 configured as an I-to-V converter. This circuit is capable of settling to 0.1% within 200 ns. Figures 13 and 14 show the full-scale settling time of the outputs. To obtain reliable circuit performance, keep the traces from the DAC’s I
to the inverting inputs of the OP467 short
OUT
to minimize parasitic capacitance.
I
I
OUT
OUT
I
OUT
I
OUT
V
DGND
V
REF
RFBC
1C
2C/
2D
1D
R
FB
REF
DS2
DS1
R/W
A/B
DB6
+10V
28
C
27
26
25
24
23
22
D
D
21
+10V
20
19
DIGITAL CONTROL SIGNALS
18
17
16
15
100
90
10
0%
2V 50mV
C3 10pF
C4 10pF
13
12
9
10
OP467
+
OP467
+
251.0ns
100ns
V
14
8
A
OUT
B
V
OUT
260.0ns
100
90
10
0%
2V 50mV
100ns
Figure 13. Voltage Output Settling Time
–14–
Figure 14. Voltage Output Settling Time
DAC-8408
R
FB
3pF
I
OUT
OP467
Figure 15. DAC V
I-V
DC OFFSET
2k
2k
AD847
60.4
Settling Time Circuit
OUT
604
1k
50
REV. E
Page 15
OP467

OP467 SPICE MACRO-MODEL

* Node assignments
noninverting input
inverting input
positive supply
negative supply
output
*
. SUBCKT OP467 1 2 99 50 27
* * INPUT STAGE *
I1 4 50 10E–3 CIN 1 2 1E–12 IOS 1 2 5E–9 Q1 528 QN Q2 679 QN R3 99 5 185 . 681 R4 99 6 185 . 681 R5 8 4 180 . 508 R6 9 4 180 . 508 EOS 7 1 POLY (1) (14,20) 50E–6 1 EREF 98 0 (20,0) 1
* * GAIN STAGE AND DOMINANT POLE AT 1.5 kHz *
R7 10 98 3 . 714E6 C2 10 98 28 . 571E–12 G1 98 10 (5,6) 5 . 386E–3 V1 99 11 1 . 6 V2 12 50 1 . 6 D1 10 11 DX D2 12 10 DX RC 10 28 1 . 4E3 CC 28 27 12E–12
* * COMMON-MODE STAGE WITH ZERO AT 1.26 kHz *
ECM 13 98 POLY (2) (1,20) (2,20) 0 0 . 5 0 . 5 R8 13 14 1E6 R9 14 98 25 . 119 C3 13 14 126 . 721E–12
* * POLE AT 400E6 *
R10 15 98 1E6 C4 15 98 0 . 398E–15 G2 98 15 (10,20) 1E–6
* * OUTPUT STAGE *
ISY 99 50 –8 . 183E–3 RMP1 99 20 96 . 429E3 RMP2 20 50 96 . 429E3 RO1 99 26 200 RO2 26 50 200 L1 26 27 1E–7 GO1 26 99 (99,15) 5E–3 GO2 50 26 (15,50) 5E–3 G4 23 50 (15,26) 5E–3 G5 24 50 (26,15) 5E–3 V3 21 26 50 V4 26 22 50 D3 15 21 DX D4 22 15 DX D5 99 23 DX D6 99 24 DX D7 50 23 DY D8 50 24 DY
* * MODELS USED *
. MODEL QN NPN (BF=33.333E3) . MODEL DX D . MODEL DY D (BV=50) . ENDS OP467
99
G2
E
REF
50
REV. E
R10
I
SY
15
C4
98
+
RMP1
20
RMP2
G4
D5
D6
V3 +
21
D3
15
D4
22
23
D7
V4
+
24
D8
G5
G01
26
G02
Figure 16. SPICE Macro-Model Output Stage
R01
R02
99
L1
27
50
99
+
V1
11
D1
R
10
R7
C2
98
+
V2
C
13
+
E
CM
D2
12
+
Q1
R4
6
Q2
7
G1
R6
4
+
E
REF
I1
R3
5
2
N–
89
I
OS
C
IN
1
N+
50
R5
E
OS
99
C
C
27
28
C3
14
R8
R9
50
Figure 17. SPICE Macro-Model Input and Gain Stage
–15–
Page 16
OP467

OUTLINE DIMENSIONS

14-Lead Plastic Dual In-Line Package [PDIP]
(N-14)
P-Suffix
Dimensions shown in inches and (millimeters)
0.685 (17.40)
0.665 (16.89)
0.645 (16.38)
14
1
0.100 (2.54) BSC
0.015 (0.38)
0.180 (4.57) MAX
0.150 (3.81)
0.130 (3.30)
0.110 (2.79)
CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN
0.022 (0.56)
0.018 (0.46)
0.014 (0.36)
COMPLIANT TO JEDEC STANDARDS MO-095-AB
0.060 (1.52)
0.050 (1.27)
0.045 (1.14)
8
7
MIN
0.295 (7.49)
0.285 (7.24)
0.275 (6.99)
SEATING PLANE
0.325 (8.26)
0.310 (7.87)
0.300 (7.62)
0.015 (0.38)
0.010 (0.25)
0.008 (0.20)
16-Lead Standard Small Outline Package [SOIC]
Wide Body
(RW-16)
S-Suffix
Dimensions shown in millimeters and (inches)
10.50 (0.4134)
10.10 (0.3976)
16
1
1.27 (0.0500) BSC
0.30 (0.0118)
0.10 (0.0039)
COPLANARITY
0.10
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN
0.51 (0.0201)
0.31 (0.0122)
COMPLIANT TO JEDEC STANDARDS MS-013AA
9
7.60 (0.2992)
7.40 (0.2913)
8
2.65 (0.1043)
2.35 (0.0925)
SEATING PLANE
10.65 (0.4193)
10.00 (0.3937)
0.33 (0.0130)
0.20 (0.0079)
8 0
0.150 (3.81)
0.135 (3.43)
0.120 (3.05)
0.75 (0.0295)
0.25 (0.0098)
1.27 (0.0500)
0.40 (0.0157)
45
14-Lead Ceramic Dual In-Line Package [CERDIP]
(Q-14)
Y-Suffix
Dimensions shown in inches and (millimeters)
0.005 (0.13) MIN
PIN 1
0.200 (5.08)
0.200 (5.08)
0.125 (3.18)
CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETERS DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN
0.785 (19.94) MAX
MAX
0.023 (0.58)
0.014 (0.36)
0.098 (2.49) MAX
14
17
0.100 (2.54) BSC
8
0.070 (1.78)
0.030 (0.76)
0.310 (7.87)
0.220 (5.59)
0.060 (1.52)
0.015 (0.38)
SEATING PLANE
0.150 (3.81) MIN
0.320 (8.13)
0.290 (7.37)
15
0
0.015 (0.38)
0.008 (0.20)
20-Terminal Ceramic Leadless Chip Carrier [LCC]
(E-20A)
RC-Suffix
Dimensions shown in inches and (millimeters)
20
1
VIEW
0.150 (3.81) BSC
0.200 (5.08) REF
0.100 (2.54) REF
0.015 (0.38) MIN
3
4
0.028 (0.71)
0.022 (0.56)
0.050 (1.27)
8
BSC
9
45 TYP
0.075 (1.91)
0.095 (2.41)
0.075 (1.90)
0.011 (0.28)
0.007 (0.18) R TYP
0.075 (1.91) REF
0.055 (1.40)
0.045 (1.14)
REF
19
18
14
13
BOTTOM
0.100 (2.54)
0.064 (1.63)
0.358 (9.09)
0.342 (8.69) SQ
CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETERS DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN
0.358
(9.09)
MAX
0.088 (2.24)
0.054 (1.37)
SQ
–16–
REV. E
Page 17
OP467

Revision History

Location Page
3/04—Data Sheet changed from REV. D to REV. E.
Changes to TPC 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Changes to ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Updated OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4/01—Data Sheet changed from REV. C to REV. D.
Footnote added to POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Footnote added to MAX RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Edits to POWER SUPPLY CONSIDERATIONS section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
REV. E
–17–
Page 18
–18–
Page 19
–19–
Page 20
C00302–0–3/04(E)
–20–
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