BB OPA2677N

®
OPA2677
OPA
267
7
OPA
267
7
For most current data sheet and other product
information, visit www.burr-brown.com
Dual, Wideband, High Output Current
OPERATIONAL AMPLIFIER
TM
FEATURES
APPLICATIONS
● WIDEBAND +12V OPERATION: 200MHz (G = +4)
● UNITY GAIN STABLE: 220MHz (G = 1)
●
●
●
●
●
●
●
●
●
●
●
HIGH OUTPUT CURRENT: 500mA
OUTPUT VOLTAGE SWING: ±5V
HIGH SLEW RATE: 1800V/µs
LOW SUPPLY CURRENT: 18mA
FLEXIBLE POWER CONTROL
DESCRIPTION
The OPA2677 provides the high output current and low distortion
required in emerging ADSL and HDSL2 driver applications.
Operating on a single +12V supply, the OPA2677 consumes a
low 9mA/chan quiescent current to deliver a very high 500mA
peak output current. Guaranteed output current supports even the
most demanding ADSL CPE requirements with > 380mA minimum output current with low harmonic distortion. Differential
driver applications will deliver < –85dBc distortion at the peak
upstream power levels of full rate ADSL. The high 200MHz
bandwidth will also support the most demanding VDSL line
driver requirements.
xDSL LINE DRIVER
CABLE MODEM DRIVER
MATCHED I/Q CHANNEL AMPLIFIER
BROADBAND VIDEO LINE DRIVER
ARB LINE DRIVER
PERFORMANCE UPGRADE TO AD8017
Power control features are included in the SO-14 package version
to allow system power to be minimized. Two logic control lines
allow four quiescent power settings. These include full power,
power cutback for short loops, idle state for no signal transmission
but line match maintenance, and shutdown for power off with a
high impedance output.
Specified on ±6V supplies (to support +12V operation), the
OPA2677 will also support a single +5V or dual ±5V supply.
Video applications will benefit from its very high output
current to drive up to 10 parallel video loads (15Ω) with < 0.1%/
0.1° dG/dØ non-linearity.
OPA2677 RELATED PRODUCTS
SINGLES
DUALS
TRIPLES
NOTES
OPA681
OPA2681
OPA3681
Single +12V Capable
—
OPA2607
—
±12V Capable
+12V
20Ω
1/2
OPA2677
324Ω
AFE
Output
2kΩ
+6.0V
17.4Ω 1:1.7
1µF
17.7Vp-p
2Vp-p
2kΩ
20Ω
15Vp-p
Twisted Pair
100Ω
82.5Ω
324Ω
17.4Ω
1/2
OPA2677
Single Supply ADSL Upstream Driver
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©
2000 Burr-Brown Corporation
PDS-1593A
Printed in U.S.A. April, 2000
SPECIFICATIONS: VS = ±6V
At TA = +25°C, G = +4, RF = 402Ω, and RL = 100Ω, unless otherwise noted. See Figure 1 for AC performance only
OPA2677U, H, N
TYP
PARAMETER
AC PERFORMANCE (Figure 1)
Small-Signal Bandwidth (VO = 0.5Vp-p)
Bandwidth for 0.1dB Gain Flatness
Large-Signal Bandwidth
Slew Rate
Rise/Fall Time
Spurious Free Dynamic Range
Input Voltage Noise
Non-Inverting Input Current Noise
Inverting Input Current Noise
Differential Gain
Differential Phase
Channel-to-Channel Crosstalk
DC PERFORMANCE(4)
Open-Loop Transimpedance Gain
Input Offset Voltage
Average Offset Voltage Drift
Non-Inverting Input Bias Current
Average Non-Inverting Input Bias Current Drift
Inverting Input Bias Current
Average Inverting Input Bias Current Drift
INPUT(4)
Common-Mode Input Range (CMIR)(5)
Common-Mode Rejection Ratio(CMRR)
Non-Inverting Input Impedance
Minimum Inverting Input Resistance
Maximum Inverting Input Resistance
OUTPUT(4)
Voltage Output Swing
Current Output, Sourcing
Current Output, Sinking
Closed-Loop Output Impedance
Power Control (SO-14 only)
Maximum Logic 0
Minimum Logic 1
Logic Input Current
Supply Current at Full Power
Supply Current at Power Cutback
Supply Current at Idle Power
Supply Current at Shutdown
Output Impedance in Idle Power
Output Impedance in Shutdown
Supply Current Step Time
Output Switching Glitch
Shutdown Isolation
POWER SUPPLY
Specified Operating Voltage
Maximum Operating Voltage
Maximum Quiescent Current
Minimum Quiescent Current
Power Supply Rejection Ratio (PSRR)
TEMPERATURE RANGE
Specification: U, N
Thermal Resistance, θJA
U SO-8
H PSO-8
N SO-14
CONDITIONS
+25°C
G = +1, RF = 511Ω
G = +2, RF = 475Ω
G = +4, RF = 402Ω
G = +8, RF = 250Ω
G = +4, VO = 0.5Vp-p
G = +4, VO = 5Vp-p
G = +4, 5V Step
G = +4, VO = 2V Step
VO = 2Vp-p, 5MHz, 100Ω
VO = 2Vp-p, 100kHz, 100Ω
220
200
200
250
80
200
1800
2
74
96
2.0
14
21
0.03
0.05
0.01
0.04
–80
NTSC, G = +2, RL = 150Ω
NTSC, G = +2, RL = 37.5Ω
NTSC, G = +2, RL = 150Ω
NTSC, G = +2, RL= 37.5Ω
f = 5MHz, Input Referred
VO = 0V, RL = 100Ω
VCM = 0V
VCM = 0V
VCM = 0V
VCM = 0V
VCM = 0V
VCM = 0V
GUARANTEED
+25°C(2)
135
±1.0
95
±5.5
±10
±30
±10
±30
±4.2
52
Open-Loop
Open-Loop
±4.5
55
250 || 2
22
22
No Load
RL = 100Ω
RL = 25Ω
VO = 0
VO = 0
G = +4, f = 100kHz
±5.1
±5.0
±4.8
500
500
0.003
A0, A1
A0, A1
A0 = A1 = 0
A0 = 1, A1 = 1
A0 = 0, A1 = 1
A0 = 1, A1 = 0
A0 = 0, A1 = 0
G = +4, f = 100kHz
1.8
2.3
50
18
13.5
3.8
0.8
0.1
100 || 4
200
±20
85
1.0
2.6
100
VCM = 0V, Input Referred
10% to 90% Change
Inputs at GND
G = +4, 1MHz, A0 = 0, A1 = 0
±6
VS = ±6V, Full Power
VS = ±6V, Full Power
f = 100kHz, Input Referred
18
18
56
Junction-to-Ambient
0°C to
70°C(3)
–40°C to
+85°C(3)
UNITS
MIN/ TEST
MAX LEVEL(1)
MHz
MHz
MHz
MHz
MHz
MHz
V/µs
ns
dB
dB
nV/√Hz
pA/√Hz
pA/√Hz
%
%
degrees
degrees
dB
typ
typ
typ
typ
typ
typ
typ
typ
typ
typ
typ
typ
typ
typ
typ
typ
typ
typ
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
90
±7
35
±45
250
±45
250
85
±7.5
40
±55
350
±55
350
kΩ
mV
µV/°C
µA
nA/°C
µA
nA°/C
min
max
max
max
max
max
max
A
A
B
A
B
A
B
±4.1
51
±4.0
50
V
dB
kΩ || pF
Ω
Ω
min
min
typ
min
max
A
A
C
B
B
±4.9
±4.8
±4.8
±4.7
±4.7
±4.5
380
380
340
340
290
290
V
V
V
mA
mA
Ω
min
min
typ
min
min
typ
A
A
C
A
A
C
V
V
µA
mA
mA
mA
mA
Ω
kΩ || pF
ns
mV
dB
max
min
max
typ
typ
typ
typ
typ
typ
typ
typ
typ
A
A
A
C
C
C
C
C
C
C
C
C
V
V
mA
mA
dB
typ
max
max
min
min
C
A
A
A
A
14
30
±6.3
18.5
17.5
52
±6.3
19
16.6
50
±6.3
19.5
16.3
49
–40 to +85
°C
125
55
100
°C/W
°C/W
°C/W
NOTES: (1) Test Levels: (A) 100% tested at 25°C. Over temperature limits by characterization and simulation. (B) Limits set by characterization and simulation.
(C) Typical value only for information. (2) Junction temperature = ambient for 25°C guaranteed specifications. (3) Junction temperature = ambient at low temperature
limit: junction temperature = ambient +23°C at high temperature limit for over temperature guaranteed specifications. (4) Current is considered positive-out-of node.
VCM is the input common-mode voltage. (5) Tested < 3dB below minimum CMRR limit at ± CMIR limits.
®
OPA2677
2
SPECIFICATIONS: VS = +5V
At TA = +25°C, G = +2, RF = 453Ω, and RL = 100Ω, unless otherwise noted. See Figure 2 for AC performance only
OPA2677U, H, N
TYP
PARAMETER
AC PERFORMANCE (Figure 2)
Small-Signal Bandwidth (VO = 0.5Vp-p)
Bandwidth for 0.1dB Gain Flatness
Large-Signal Bandwidth
Slew Rate
Rise/Fall Time
Spurious Free Dynamic Range
Input Voltage Noise
Non-Inverting Input Current Noise
Inverting Input Current Noise
Channel-to-Channel Crosstalk
CONDITIONS
+25°C
G = +1, RF = 536Ω
G = +2, RF = 511Ω
G = +4, RF = 453Ω
G = +8, RF = 332Ω
G = +4, VO = 0.5Vp-p
G = +4, VO = 2Vp-p
G = +4, 2V Step
G = +4, VO = 2V Step
VO = 2Vp-p, 5MHz, 100Ω
VO = 2Vp-p, 100kHz, 100Ω
160
150
160
160
70
100
1100
2
67
87
2.0
14
21
–80
f = 5MHz, Input Referred
GUARANTEED
+25°C(2)
0°C to
70°C(3)
–40°C to
+85°C(3)
UNITS
MIN/ TEST
MAX LEVEL(1)
MHz
MHz
MHz
MHz
MHz
MHz
V/µs
ns
dB
dB
nV/√Hz
pA/√Hz
pA/√Hz
dB
typ
typ
typ
typ
typ
typ
typ
typ
typ
typ
typ
typ
typ
typ
C
C
C
C
C
C
C
C
C
C
C
C
C
C
PERFORMANCE(4)
DC
Open-Loop Transimpedance Gain
Input Offset Voltage
Average Offset Voltage Drift
Non-Inverting Input Bias Current
Average Non-Inverting Input Bias Current Drift
Inverting Input Bias Current
Average Inverting Input Bias Current Drift
INPUT(4)
Most Positive Input Voltage
Least Positive Input Voltage
Common-Mode Rejection Ratio(CMRR)
Non-Inverting Input Impedance
Minimum Inverting Input Resistance
Maximum Inverting Input Resistance
OUTPUT(4)
Most Positive Output Voltage
Least Positive Output Voltage
Current Output, Sourcing
Current Output, Sinking
Closed-Loop Output Impedance
Power Control (SO-14 only)
Maximum Logic 0
Minimum Logic 1
Logic Input Current
Supply Current at Full Power
Supply Current at Power Cutback
Supply Current at Idle Power
Supply Current at Shutdown
Output Impedance in Idle Power
Output Impedance in Shutdown
Supply Current Step Time
Output Switching Glitch
Shutdown Isolation
POWER SUPPLY
Specified Operating Voltage
Maximum Operating Voltage
Maximum Quiescent Current
Minimum Quiescent Current
Power Supply Rejection Ratio (PSRR)
TEMPERATURE RANGE
Specification: U, N
Thermal Resistance, θJA
U SO-8
H PSO-8
N SO-14
VO = 0V, RL = 100Ω
VCM = 0V
VCM = 0V
VCM = 0V
VCM = 0V
VCM = 0V
VCM = 0V
125
±0.8
90
±4.0
±10
±30
±10
±30
3.4
1.6
50
Open-Loop
Open-Loop
3.7
1.3
52
250 || 2
29
29
No Load
RL = 100Ω
No Load
RL = 100Ω
VO = 2.5V
VO = 2.5V
G = +4, f = 100kHz
4.2
4.0
0.8
1.0
300
300
0.02
4.0
3.9
1.0
1.1
200
200
A0, A1
A0, A1
A0 = A1 = 0
A0 = 1, A1 = 1
A0 = 0, A1 = 1
A0 = 1, A1 = 0
A0 = 0, A1 = 0
G = +4, f = 100kHz
1.8
2.3
50
13.5
11
2
0.8
0.1
100 || 4
200
±20
85
1.0
2.6
100
VCM = 2.5V, Input Referred
10% to 90% Change
Inputs at GND
G = +4, 1MHz, A0 = 0, A1 = 0
85
±5.5
35
±45
250
±45
250
80
±6.0
40
±55
350
±55
350
kΩ
mV
µV/°C
µA
nA/°C
µA
nA°/C
min
max
max
max
max
max
max
A
A
B
A
B
A
B
3.3
1.7
49
3.2
1.8
48
V
V
dB
kΩ || pF
Ω
Ω
min
max
min
typ
min
max
A
A
A
C
B
B
3.9
3.8
1.1
1.2
160
160
3.7
3.6
1.3
1.5
120
120
V
V
V
V
mA
mA
Ω
min
min
max
max
min
min
typ
A
A
A
A
A
A
C
V
V
µA
mA
mA
mA
mA
Ω
kΩ || pF
ns
mV
dB
max
min
max
typ
typ
typ
typ
typ
typ
typ
typ
typ
A
A
A
C
C
C
C
C
C
C
C
C
V
V
mA
mA
dB
typ
max
max
min
typ
C
A
A
A
C
20
37
+5
VS = +5V, Full Power
VS = +5V, Full Power
f = 100kHz, Input Referred
13.5
13.5
52
Junction-to-Ambient
+12.6
14.5
12.5
+12.6
15
12
+12.6
15.5
11.5
–40 to +85
°C
125
55
100
°C/W
°C/W
°C/W
NOTES: (1) Test Levels: (A) 100% tested at 25°C. Over temperature limits by characterization and simulation. (B) Limits set by characterization and simulation.
(C) Typical value only for information. (2) Junction temperature = ambient for 25°C guaranteed specifications. (3) Junction temperature = ambient at low temperature
limit: junction temperature = ambient +23°C at high temperature limit for over temperature guaranteed specifications. (4) Current is considered positive-out-of node.
VCM is the input common-mode voltage. (5) Tested < 3dB below minimum specified CMRR at ± CMIR limits.
®
3
OPA2677
PIN CONFIGURATIONS
ABSOLUTE MAXIMUM RATINGS
Power Supply .............................................................................. ±6.5VDC
Internal Power Dissipation(1) ............................ See Thermal Information
Differential Input Voltage .................................................................. ±1.2V
Input Voltage Range ............................................................................ ±VS
Storage Temperature Range: U, N, H ........................... –40°C to +125°C
Lead Temperature (soldering, 10s) .............................................. +300°C
Junction Temperature (TJ ) ........................................................... +175°C
Top View
NOTE:: (1) Packages must be derated based on specified θJA. Maximum TJ
must be observed.
ELECTROSTATIC
DISCHARGE SENSITIVITY
SO-8, PSO-8
OPA2677U, H
Out A
1
8
+VS
–In A
2
7
Out B
+In A
3
6
–In B
–VS
4
5
+In B
SO-14
OPA2677N
Electrostatic discharge can cause damage ranging from performance degradation to complete device failure. Burr-Brown
Corporation recommends that all integrated circuits be handled
and stored using appropriate ESD protection methods.
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.
–In A
1
14 Out A
+In A
2
13 NC
A0
3
12 NC
–VS
4
A1
5
10 NC
+In B
6
9
NC
–In B
7
8
Out B
Power
Control
11 +VS
PACKAGE/ORDERING INFORMATION
PRODUCT
PACKAGE
PACKAGE
DRAWING
NUMBER
OPA2677U
SO-8 Surface Mount
182
–40°C to +85°C
OPA2677U
OPA2677U
Rails
"
"
"
"
OPA2677U/2K5
Tape and Reel
PSO-8 Surface Mount
182-1
–40°C to +85°C
OPA2677H
—
Rails
"
"
"
"
—
Tape and Reel
SO-14 Surface Mount
235
–40°C to –85°C
OPA2677N
—
Rails
"
"
"
"
—
Tape and Reel
"
OPA2677H
"
OPA2677N
"
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING
ORDERING
NUMBER(1)
TRANSPORT
MEDIA
NOTE: (1) Models with a slash (/) are available only as Tape and Reel in the quantity indicated after the slash (e.g. /2K5 indicates 2500 devices per reel). Ordering 2500
pieces of the OPA2677U/2K5 will get a single 2500-piece Tape and Reel.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
®
OPA2677
4
TYPICAL PERFORMANCE CURVES: VS = ±6V
At TA = +25°C, G = +4, RF = 402Ω, and RL = 100Ω, unless otherwise noted. See Figure 1 for AC performance only
INVERTING SMALL-SIGNAL
FREQUENCY RESPONSE
NON-INVERTING SMALL-SIGNAL
FREQUENCY RESPONSE
6
VO = 0.5Vp-p
G = +8
RF = 250Ω
0
G = +1
RF = 511Ω
–3
G = +2
RF = 475Ω
–6
–9
–12
–15
G = +4
RF = 402Ω
See Figure 1.
G = –8, RF = 280Ω
0
G = –2, RF = 422Ω
–3
–6
G = –8, RF = 280Ω
–9
G = –4, RF = 383Ω
–12
–15
–18
–18
0
18
100
200
300
400
0
500
100
200
300
400
Frequency (MHz)
Frequency (MHz)
NON-INVERTING LARGE-SIGNAL
FREQUENCY RESPONSE
INVERTING LARGE-SIGNAL
FREQUENCY RESPONSE
18
G = +4, See Figure 1
15
Gain (dB)
3
0
VO = 10Vp-p
–3
VO = 8Vp-p
–6
VO = 5Vp-p
9
6
500
VO = 8Vp-p
12
VO ≤ 1Vp-p
9
G = –4
RF = 383Ω
15
VO = 2Vp-p
12
6
3
0
VO = 10Vp-p
–3
–6
–9
–9
–12
–12
VO ≤ 1Vp-p
–15
–15
0
100
200
300
400
500
0
100
200
300
400
Frequency (MHz)
Frequency (MHz)
NON-INVERTING PULSE RESPONSE
INVERTING PULSE RESPONSE
500
G = +4
Large Signal
200mVp-p
Small Signal
Right Scale
Left Scale
Output Voltage (1V/div)
5Vp-p
Output Voltage (100mV/div)
Left Scale
Output Voltage (1V/div)
Gain (dB)
VO = 0.5Vp-p
3
Time (5ns/div)
5Vp-p
Large Signal
200mVp-p
Right Scale
Small Signal
Output Voltage (100mV/div)
Normalized Gain (dB)
3
Normalized Gain (dB)
6
Time (5ns/div)
®
5
OPA2677
TYPICAL PERFORMANCE CURVES: VS = ±6V
(Cont.)
At TA = +25°C, G = +4, RF = 402Ω, and RL = 100Ω, unless otherwise noted. See Figure 1 for AC performance only
HARMONIC DISTORTION vs FREQUENCY
HARMONIC DISTORTION vs OUTPUT VOLTAGE
–60
–60
VO = 2Vp-p
RL = 100Ω
F = 5MHz
RL = 100Ω
–65
2nd-Harmonic
Harmonic Distortion (dBc)
Harmonic Distortion (dBc)
–65
–70
–75
–80
–85
3rd-Harmonic
–90
Single Channel. See text
for differential performance.
–95
2nd-Harmonic
–70
–75
–80
–85
3rd-Harmonic
–90
–95
Single Channel. See text for differential performance.
–100
–100
0.1
1
10
20
0.1
1
Frequency (MHz)
HARMONIC DISTORTION vs INVERTING GAIN
HARMONIC DISTORTION vs NON-INVERTING GAIN
–65
Harmonic Distortion (dBc)
–60
VO = 2Vp-p
f = 5MHz
RL = 100Ω
–70
VO = 2Vp-p
f = 5MHz
RL = 100Ω
–65
2nd-Harmonic
Harmonic Distortion (dBc)
–60
–75
–80
–85
3rd-Harmonic
–90
–70
2nd-Harmonic
–75
–80
–85
3rd-Harmonic
–90
–95
–95
Single Channel (see text for differential performance).
Single Channel (see text for differential performance).
–100
–100
1
1
10
10
Gain Magnitude (V/V)
Gain Magnitude (–V/V)
HARMONIC DISTORTION vs LOAD RESISTANCE
2-TONE, 3rd-ORDER
INTERMODULATION SPURIOUS
–60
–60
2nd-Harmonic
VO = 2Vp-p
f = 5MHz
–70
–75
–80
3rd-Harmonic
–85
–90
Single Channel. See text
for differential performance.
–95
20MHz
Figure 1
3rd-Order Spurious Level (dBc)
–65
Harmonic Distortion (dBc)
10
Output Voltage (Vp-p)
–65
–70
–75
10MHz
–80
–85
–90
–95
1MHz
5MHz
Single Channel. See text
for differential performance.
–100
–100
10
100
–10
1000
®
OPA2677
–5
0
5
Single-Tone Load Power (dBm)
Load Resistance (Ω)
6
10
TYPICAL PERFORMANCE CURVES: VS = ±6V
(Cont.)
At TA = +25°C, G = +4, RF = 402Ω, and RL = 100Ω, unless otherwise noted. See Figure 1 for AC performance only
6
5
4
3
2
1
0
–1
–2
–3
–4
–5
–6
VO (V)
Output Voltage (V)
MAXIMUM OUTPUT SWING
vs LOAD RESISTANCE
Figure 1
10
100
1000
OUTPUT VOLTAGE AND CURRENT LIMITATIONS
6
5
4
3
RL = 100Ω
2
RL = 50Ω
RL = 10Ω
1
0
RL = 25Ω
–1
1W Internal Power
Single Ch.
–2
–3
–4
1W Internal Power
Single Ch.
–5
–6
–600
–400
–200
0
200
400
600
IO (mA)
Load Resistance (Ω)
CHANNEL-TO-CHANNEL CROSSTALK
OUTPUT VOLTAGE AND CURRENT LIMITATIONS
–60
20pA/√Hz
Inverting Current Noise
Non-Inverting Current Noise
10
15pA/√Hz
Voltage Noise
–65
Crosstalk, Input Referred (dB)
Voltage Noise nV/√Hz
Current Noise pA/√Hz
100
2nV/√Hz
1
–70
–75
–80
–85
–90
–95
–100
102
103
104
105
106
107
106
107
RECOMMENDED RS vs CAPACITIVE LOAD
FREQUENCY RESPONSE vs CAPACITIVE LOAD
90
2
CL = 10pF
Normalized Gain to Capacitive
Load (dB)
80
70
60
RS (Ω)
108
Frequency (Hz)
Frequency (Hz)
50
40
30
20
0
CL = 100pF
–2
–4
1/2
OPA2677
–6
CL = 22pF
RS
CL = 47pF
CL
1kΩ
402Ω
–8
133Ω
10
1kΩ is optional.
–10
0
1
10
100
1M
1000
Capacitive Load (pF)
10M
100M
1G
Frequency (Hz)
®
7
OPA2677
TYPICAL PERFORMANCE CURVES: VS = ±6V
(Cont.)
At TA = +25°C, G = +4, RF = 402Ω, and RL = 100Ω, unless otherwise noted. See Figure 1 for AC performance only
Transimpedance Gain (20dBΩ/div)
Power Supply Rejection Ratio (dB)
Common-Mode Rejection Ratio (dB)
CMRR
60
50
40
–PSRR
30
+PSRR
20
10
0
120
0
100
–45
80
–90
60
–135
40
–180
20
–225
0
103
104
105
106
107
108
104
105
106
Frequency (Hz)
–270
109
108
Frequency (Hz)
CLOSED-LOOP OUTPUT IMPEDANCE
vs FREQUENCY
COMPOSITE VIDEO dG/dφ
100
0.14
10
0.12
G = +2
RF = 475Ω
VS = ±5V
dφ, Positive Video
dφ, Negative Video
0.10.
dG/dφ (%/°)
1
0.1
0.01
0.08
0.06
0.04
dG, Positive Video
0.001
0.02
dG, Negative Video
0.00
105
106
107
108
109
1
2
3
Frequency (Hz)
Input
0
0
–2
–1
–4
–6
–8
–2
G = +4
RL = 100Ω
Figure 1
Output Voltage (2V/div)
1
Input Voltage (1V/div)
2
Output
2
Input
6
3
4
6
8
4
6
5
7
8
9
10
INVERTING OVERDRIVE RECOVERY
NON-INVERTING OVERDRIVE RECOVERY
8
4
Number of 150Ω Loads
4
3
4
2
2
1
0
0
–2
–1
–4
–2
–6
–3
G = –4
RL = 100Ω
–3
Output
–8
–4
®
OPA2677
–4
Time (20ns/div)
Time (20ns/div)
8
Input Voltage (1V/div)
104
Output Voltage (2V/div)
Output Impedance Magnitude (Ω)
107
Transimpedance Phase (45°/div)
OPEN-LOOP TRANSIMPEDANCE GAIN AND PHASE
CMRR AND PSRR vs FREQUENCY
70
TYPICAL PERFORMANCE CURVES: VS = ±6V
(Cont.)
At TA = +25°C, G = +4, RF = 402Ω, and RL = 100Ω, unless otherwise noted. See Figure 1 for AC performance only
SUPPLY AND OUTPUT CURRENT
vs TEMPERATURE
600
8
550
Non-Inverting Bias Current
4
2
0 Input Offset Voltage
–2
Inverting Bias Current
–4
40
450
Sinking Output Current
400
30
350
300
20
Supply Current, Full Power
250
–6
200
–8
150
–10
–55
Sourcing Output Current
500
Output Current (mA)
6
50
10
0
100
–35
–15
5
25
45
65
85
105
–55
125
Output Current (mA)
10
–35
–15
5
25
45
65
85
105
125
Temperature (°C)
Ambient Temperature (°C)
CMIR AND OUTPUT VOLTAGE
vs SUPPLY VOLTAGE
6
No Load
5
Voltage Range (±V)
Input Offset Voltage (mV)
Input Bias Current (µA)
TYPICAL DC ERROR DRIFT
vs TEMPERATURE
± Output Voltage
4
3
–V Input Voltage
2
+V Input Voltage
1
0
2
3
4
5
6
Supply Voltage (±V)
®
9
OPA2677
TYPICAL PERFORMANCE CURVES: VS = +5V
At TA = +25°C, G = +4, RF = 453Ω, and RL = 100Ω to VS/2, unless otherwise noted. See Figure 2.
INVERTING SMALL-SIGNAL
FREQUENCY RESPONSE
NON-INVERTING SMALL-SIGNAL
FREQUENCY RESPONSE
6
6
3
G = +1
RF = 536Ω
0
Normalized Gain (dB)
Normalized Gain (dB)
3
–3
G = +2
RF = 511Ω
–6
–9
G = +4
RF = 453Ω
–12
–15
G = +8
RF = 332Ω
G = –8
RF = 332Ω
0
–3
–6
G = –1
RF = 536Ω
–9
G = –4
RF = 453Ω
–12
G = –2
RF = 511Ω
–15
See Figure 2.
–18
–18
0
50
100
150
200
0
250
50
100
SMALL-SIGNAL PULSE RESPONSE
200
250
LARGE-SIGNAL PULSE RESPONSE
1.6
VO = 500mVp-p
Output Voltage (400mV/div)
300
200
100
0
–100
–200
–300
VO = 2Vp-p
1.2
0.8
0.4
0
–0.4
–0.8
–1.2
See Figure 2.
See Figure 2.
–400
–1.6
Time (5ns/div)
Time (5ns/div)
RECOMMENDED RS vs CAPACITIVE LOAD
FREQUENCY RESPONSE vs CAPACITIVE LOAD
50
2
Normalized Gain to Capacitive
Load (dB)
45
40
35
RS (Ω)
Output Voltage (100mV/div)
400
150
Frequency (MHz)
Frequency (MHz)
30
25
20
15
10
CL = 10pF
0
CL = 100pF
–2
CL = 22pF
+5V
5kΩ
–4
0.1µF
VI
RS
1/2
VO
5kΩ OPA2677
–6
CL
1kΩ
CL = 47pF
453Ω
–8
150Ω
5
1kΩ Load Optional.
0.1µF
0
–10
1
10
100
1M
1000
Capacitive Load (pF)
100M
Frequency (Hz)
®
OPA2677
10M
10
1G
TYPICAL PERFORMANCE CURVES: VS = +5V
(Cont.)
At TA = +25°C, G = +4, RF = 453Ω, and RL = 100Ω, unless otherwise noted. See Figure 2 for AC performance only.
HARMONIC DISTORTION vs OUTPUT VOLTAGE
HARMONIC DISTORTION vs FREQUENCY
–50
–50
VO = 2Vp-p
RL = 100Ω to VS/2
f = 5MHz
RL = 100Ω to VS/2
–55
Harmonic Distortion (dBc)
Harmonic Distortion (dBc)
–55
–60
2nd-Harmonic
–65
–70
–75
3rd-Harmonic
–80
–60
–65
2nd-Harmonic
–70
Single Channel.
See Figure 2.
–75
–80
–85
–85
3rd-Harmonic
Single Channel. See Figure 2.
–90
–90
0.1
1
10
0.1
20
1
HARMONIC DISTORTION vs INVERTING GAIN
HARMONIC DISTORTION vs NON-INVERTING GAIN
–50
–60
VO = 2Vp-p
f = 5MHz
RL = 100Ω to VS/2
–55
Harmonic Distortion (dBc)
Harmonic Distortion (dBc)
–50
VO = 2Vp-p
f = 5MHz
RL = 100Ω to VS/2
–55
2nd-Harmonic
–65
–70
–75
3rd-Harmonic
–80
–60
2nd-Harmonic
–65
–70
3rd-Harmonic
–75
–80
–85
–85
Single Channel
Single Channel
–90
–90
1
–1
10
–10
Gain (V/V)
Gain Magnitude (V/V)
HARMONIC DISTORTION vs LOAD RESISTANCE
2-TONE, 3rd-ORDER SPURIOUS LEVEL
–50
–50
VO = 2Vp-p
f = 5MHz
–60
Single Channel. See Figure 2.
3rd-Order Spurious Level (dBc)
–55
Harmonic Distortion (dBc)
2
Output Voltage (Vp-p)
Frequency (MHz)
2nd-Harmonic
–65
–70
–75
3rd-Harmonic
–80
–85
–55
20MHz
–60
–65
–70
10MHz
–75
–80
–85
Single Channel.
–90
10
100
1000
–10
Load Resistance (Ω)
1MHz
5MHz
–90
–5
0
5
10
Single-Tone Load Power (dBm)
®
11
OPA2677
APPLICATIONS INFORMATION
Figure 2 shows the AC coupled, gain of +4, single supply
circuit configuration used as the basis of the +5V Specifications and Typical Performance Curves. Though not a “railto-rail” design, the OPA2677 requires minimal input and
output voltage headroom compared to other very wideband
current feedback op amps. It will deliver a 3Vp-p output
swing on a single +5V supply with greater than 100MHz
bandwidth. The key requirement of broadband single supply
operation is to maintain input and output signal swings
within the usable voltage ranges at both the input and the
output. The circuit of Figure 2 establishes an input midpoint
bias using a simple resistive divider from the +5V supply
(two 806Ω resistors). The input signal is then AC coupled
into this midpoint voltage bias. The input voltage can swing
to within 1.3V of either supply pin, giving a 2.4Vp-p input
signal range centered between the supply pins. The input
impedance matching resistor (57.6Ω) used for testing is
adjusted to give a 50Ω input match when the parallel
combination of the biasing divider network is included. The
gain resistor (RG) is AC coupled, giving the circuit a DC
gain of +1—which puts the input DC bias voltage (2.5V) on
the output as well. The feedback resistor value has been
adjusted from the bipolar supply condition to re-optimize for
a flat frequency response in +5V, gain of +4, operation.
Again, on a single +5V supply, the output voltage can swing
to within 1V of either supply pin while delivering more than
200mA output current. A demanding 100Ω load to a midpoint bias is used in this characterization circuit. The new
output stage used in the OPA2677 can deliver large bipolar
output currents into this midpoint load with minimal crossover distortion, as shown by the +5V supply, harmonic
distortion plots.
WIDEBAND CURRENT FEEDBACK OPERATION
The OPA2677 gives the exceptional AC performance of a
wideband current feedback op amp with a highly linear, high
power output stage. Requiring only 9mA/ch. quiescent current, the OPA2677 will swing to within 1V of either supply
rail and deliver in excess of 380mA guaranteed at room
temperature. This low output headroom requirement, along
with supply voltage independent biasing, gives remarkable
single (+5V) supply operation. The OPA2677 will deliver
greater than 150MHz bandwidth driving a 2Vp-p output into
100Ω on a single +5V supply. Previous boosted output stage
amplifiers have typically suffered from very poor crossover
distortion as the output current goes through zero. The
OPA2677 achieves a comparable power gain with much
better linearity. The primary advantage of a current feedback
op amp over a voltage feedback op amp is that AC performance (bandwidth and distortion) is relatively independent
of signal gain.
Figure 1 shows the DC coupled, gain of +4, dual power
supply circuit configuration used as the basis of the ±6V
Specifications and Typical Performance Curves. For test
purposes, the input impedance is set to 50Ω with a resistor
to ground and the output impedance is set to 50Ω with a
series output resistor. Voltage swings reported in the specifications are taken directly at the input and output pins while
load powers (dBm) are defined at a matched 50Ω load. For
the circuit of Figure 1, the total effective load will be 100Ω
|| 537Ω = 84Ω.
0.1µF
+6V
+VS
+5V
+VS
6.8µF
+
0.1µF
50Ω Source
+
6.8µF
806Ω
VI
50Ω
VO
1/2
OPA2677
50Ω
50Ω Load
0.1µF
VI
57.6Ω
806Ω
RF
402Ω
1/2
OPA2677
VO
100Ω
VS/2
RF
453Ω
RG
133Ω
RG
150Ω
+
6.8µF
0.1µF
0.1µF
–VS
–6V
FIGURE 2. AC-Coupled, G = +4, Single Supply Specification and Test Circuit.
FIGURE 1. DC-Coupled, G = +4, Bipolar Supply, Specification and Test Circuit.
®
OPA2677
12