Analog Devices AD829 g Datasheet

High Speed, Low Noise
Video Op Amp
FEATURES High Speed
120 MHz Bandwidth, Gain = –1 230 V/s Slew Rate 90 ns Settling Time to 0.1%
Ideal for Video Applications
0.02% Differential Gain
0.04ⴗ Differential Phase
Low Noise
1.7 nV/Hz Input Voltage Noise
1.5 pA/Hz Input Current Noise
Excellent DC Precision
1 mV Max Input Offset Voltage (Over Temp)
0.3 mV/C Input Offset Drift
Flexible Operation
Specified for 5 V to 15 V Operation 3 V Output Swing into a 150 Load External Compensation for Gains 1 to 20 5 mA Supply Current
Available in Tape and Reel in Accordance with
EIA-481A Standard

GENERAL DESCRIPTION

The AD829 is a low noise (1.7 nV/Hz), high speed op amp with custom compensation that provides the user with gains of ±1 to ±20 while maintaining a bandwidth greater than 50 MHz. The AD829’s 0.04° differential phase and 0.02% differential gain performance at 3.58 MHz and 4.43 MHz, driving reverse­terminated 50 or 75 cables, makes it ideally suited for professional video applications. The AD829 achieves its 230 V/µs uncompensated slew rate and 750 MHz gain bandwidth while requiring only 5 mA of current from power supplies.
The AD829’s external compensation pin gives it exceptional versatility. For example, compensation can be selected to optimize the bandwidth for a given load and power supply voltage. As a gain-of-two line driver, the –3 dB bandwidth can be increased to 95 MHz at the expense of 1 dB of peaking. The AD829’s output can also be clamped at its external compensation pin.
The AD829 exhibits excellent dc performance. It offers a mini­mum open-loop gain of 30 V/mV into loads as low as 500 Ω, low input voltage noise of 1.7 nV/Hz, and a low input offset voltage of 1 mV maximum. Common-mode rejection and power supply rejection ratios are both 120 dB.
This op amp is also useful in multichannel, high speed data conversion where its fast (90 ns to 0.1%) settling time is impor­tant. In such applications, the AD829 serves as an input buffer for 8-bit to 10-bit A/D converters and as an output I/V con­verter for high speed DACs.
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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.

CONNECTION DIAGRAMS

8-Lead
PDIP(N), Cerdip (Q), and SOIC (R) Packages
OFFSET NULL
–IN
+IN
–V
1
2
3
4
S
AD829
TOP VIEW
(Not to Scale)
8
OFFSET NULL
+V
7
S
6
OUTPUT
C
5
COMP
20-Lead LCC Pinout
NC
NC
OFFSET
NULL
OFFSET
NULL
NC
20 19123
NC
COMP
C
NC
18
+V
17
NC
16
OUTPUT
15
14
NC
4
NC
5
–IN
6
NC
+IN
NC
NC = NO CONNECT
7
8
910111213
TOP VIEW
(Not to Scale)
NC
AD829
NC
–V
Operating as a traditional voltage feedback amplifier, the AD829 provides many of the advantages a transimpedance amplifier offers. A bandwidth greater than 50 MHz can be maintained for a range of gains through the replacement of the external com­pensation capacitor. The AD829 and the transimpedance amplifier are both unity gain stable and provide similar voltage noise performance (1.7 nV/Hz); however, the current noise of the AD829 (1.5 pA/Hz) is less than 10% of the noise of transimpedance amps. The inputs of the AD829 are symmetrical.

PRODUCT HIGHLIGHTS

1. Input voltage noise of 2 nV/Hz, current noise of 1.5 pA/Hz,
and 50 MHz bandwidth, for gains of 1 to 20, make the AD829 an ideal preamp.
2. Differential phase error of 0.04° and a 0.02% differential
gain error, at the 3.58 MHz NTSC and 4.43 MHz PAL and SECAM color subcarrier frequencies, make the op amp an outstanding video performer for driving reverse-terminated 50 and 75 cables to ± 1 V (at their terminated end).
3. The AD829 can drive heavy capacitive loads.
4. Performance is fully specified for operation from ±5 V to ±15 V supplies.
5. The AD829 is available in plastic, CERDIP, and small outline packages. Chips and MIL-STD-883B parts are also available. The SOIC-8 package is available for the extended tempera­ture range of –40°C to +125°C.
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.
AD829–SPECIFICATIONS
(@ TA = 25C and VS = 15 V dc, unless otherwise noted.)
Model Conditions V
S
Min Typ Max Min Typ Max Min Typ Max Unit
INPUT OFFSET VOLTAGE ±5 V, ±15 V 0.2 1 0.2 1 0.1 0.5 mV
AD829JR AD829AR AD829AQ/S
T
MIN
to T
MAX
110.5 mV
Offset Voltage Drift ±5 V, ±15 V 0.3 0.3 0.3 µV/°C
INPUT BIAS CURRENT ±5 V, ±15 V 3.3 7 3.3 7 3.3 7 µA
T
MIN
to T
MAX
8.2 9.5 9.5 µA
INPUT OFFSET CURRENT ±5 V, ±15 V 50 500 50 500 50 500 nA
T
MIN
to T
MAX
500 500 500 nA
Offset Current Drift ±5 V, ±15 V 0.5 0.5 0.5 nA/°C
OPEN-LOOP GAIN V
= ±2.5 V ± 5 V
O
R
= 500 30 65 30 65 30 65 V/mV
LOAD
to T
T
MIN
R V R T
R
MAX
= 150 40 40 40 V/mV
LOAD
= ± 10 V ± 15 V
OUT
= 1 k 50 100 50 100 50 100 V/mV
LOAD
to T
MIN
MAX
= 500 85 85 85 V/mV
LOAD
20 20 20 V/mV
20 20 20 V/mV
DYNAMIC PERFORMANCE
Gain Bandwidth Product ±5 V 600 600 600 MHz
Full Power Bandwidth
1, 2
VO = 2 V p-p R
= 500 Ω±5 V 25 25 25 MHz
LOAD
±15 V 750 750 750 MHz
VO = 20 V p-p R
= 1 kΩ±15 V 3.6 3.6 3.6 MHz
Slew Rate
2
LOAD
R
= 500 Ω±5 V 150 150 150 V/µs
LOAD
R
= 1 kΩ±15 V 230 230 230 V/µs
LOAD
Settling Time to 0.1% AV = –19
–2.5 V to +2.5 V ±5 V 65 65 65 ns
Phase Margin
DIFFERENTIAL GAIN ERROR
2
3
DIFFERENTIAL PHASE ERROR3R
10 V Step ±15 V 90 90 90 ns C
= 10 pF ±15 V
LOAD
R
= 1 k 60 60 60 Degrees
LOAD
R
= 100 Ω±15 V
LOAD
C
= 30 pF 0.02 0.02 0.02
COMP
= 100 Ω±15 V
LOAD
C
= 30 pF 0.04 0.04 0.04 Degrees
COMP
%
COMMON-MODE REJECTION VCM = ± 2.5 V ±5 V 100 120 100 120 100 120 dB
VCM = ± 12 V ±15 V 100 120 100 120 100 120 dB T
MIN
to T
MAX
96 96 96 dB
POWER SUPPLY REJECTION VS = ± 4.5 V to ±18 V 98 120 98 120 98 120 dB
T
MIN
to T
MAX
94 94 94 dB
INPUT VOLTAGE NOISE f = 1 kHz ±15 V 1.7 2 1.7 2 1.7 2 nV/Hz
INPUT CURRENT NOISE f = 1 kHz ± 15 V 1.5 1.5 1.5 pA/Hz
INPUT COMMON-MODE
VOLTAGE RANGE ±5 V +4.3 +4.3 +4.3 V
–3.8 –3.8 –3.8 V
±15 V +14.3 +14.3 +14.3 V
–13.8 –13.8 –13.8 V
OUTPUT VOLTAGE SWING R
= 500 Ω±5 V ±3.0 ± 3.6 ±3.0 ±3.6 ±3.0 ± 3.6 V
LOAD
R
= 150 Ω±5 V ±2.5 ± 3.0 ±2.5 ±3.0 ±2.5 ± 3.0 V
LOAD
R
50 Ω±5 V ± 1.4 ±1.4 ±1.4 V
LOAD =
R
= 1 kΩ±15 V ± 12 ± 13.3 ±12 ±13.3 ± 12 ±13.3 V
LOAD
R
= 500 Ω±15 V ± 10 ± 12.2 ±10 ±12.2 ± 10 ±12.2 V
LOAD
Short Circuit Current ±5 V, ±15 V 32 32 32 mA
INPUT CHARACTERISTICS
Input Resistance (Differential) 13 13 13 k Input Capacitance (Differential)
4
55 5pF
Input Capacitance (Common Mode) 1.5 1.5 1.5 pF
CLOSED-LOOP OUTPUT
RESISTANCE AV = +1, f = 1 kHz 2 2 2 m
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AD829
Model Conditions V
S
Min Typ Max Min Typ Max Min Typ Max Unit
POWER SUPPLY
Operating Range ±4.5 ±18 ±4.5 ±18 ± 4.5 ± 18 V Quiescent Current ±15 V 5 6.5 5 6.5 5 6.5 mA
AD829JR AD829AR AD829AQ/S
T
MIN
to T
MAX
8.0 8.0 8.2/8.7 mA
±15 V 5.3 6.8 5.3 6.8 5.3 6.8 mA
T
MIN
to T
MAX
8.3 9.0 8.5/9.0 mA
TRANSISTOR COUNT Number of Transistors 46 46 46
NOTES
1
Full Power Bandwidth = Slew Rate/2 π V
2
Tested at Gain = +20, C
3
3.58 MHz (NTSC) and 4.43 MHz (PAL and SECAM).
4
Differential input capacitance consists of 1.5 pF package capacitance plus 3.5 pF from the input differential pair.
COMP
= 0 pF.
PEAK
.
Specifications subject to change without notice.
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AD829

ABSOLUTE MAXIMUM RATINGS

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18 V
Internal Power Dissipation
2
1
PDIP (N) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 W
SOIC (R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.9 W
CERDIP (Q) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 W
LCC (E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.8 W
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±V
Differential Input Voltage
3
. . . . . . . . . . . . . . . . . . . . . . . ± 6 V
Output Short Circuit Duration . . . . . . . . . . . . . . . . . Indefinite
Storage Temperature Range (Q, E) . . . . . . . . –65°C to +150°C
Storage Temperature Range (N, R) . . . . . . . . –65°C to +125°C
Operating Temperature Range
AD829J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
AD829A . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +125°C
AD829S . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to +125°C
Lead Temperature Range (Soldering 60 sec) . . . . . . . . . 300°C
NOTES
1
Stresses above those listed under Absolute Maximum Ratings may cause perma­nent damage to the device. This is a stress rating only; the functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
2
Maximum internal power dissipation is specified so that TJ does not exceed 150°C at an ambient temperature of 25°C. Thermal characteristics:
8-lead PDIP package: θJA = 100°C/W (derate at 8.7 mW/°C) 8-lead CERDIP package: θJA = 110°C/W (derate at 8.7 mW/°C) 20-lead LCC package: θJA = 77°C/W 8-lead SOIC package: θJA = 125°C/W (derate at 6 mW/°C).
3
If the differential voltage exceeds 6 V, external series protection resistors should be added to limit the input current.

METALLIZATION PHOTO

Contact factory for latest dimensions.
Dimensions shown in inches and (mm).
SUBSTRATE CONNECTED TO +V
2.5
2.0
1.5
1.0
PDIP
CERDIP
S
LCC
0.5
MAXIMUM POWER DISSIPATION (W)
0
–55 –45–35 –25–15 –5 5 15 25 35 45 55 65 75 85 95 105 115 125
SOIC
AMBIENT TEMPERATURE (C)
Figure 1. Maximum Power Dissipation vs. Temperature
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD829 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.
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ORDERING GUIDE

Model Temperature Range Package Description Package Option
AD829AR –40°C to +125°C 8-Lead Plastic SOIC R-8 AD829AR-REEL –40°C to +125°C 8-Lead Plastic SOIC R-8 AD829AR-REEL7 –40°C to +125°C 8-Lead Plastic SOIC R-8 AD829ARZ* –40°C to +125°C 8-Lead Plastic SOIC R-8 AD829ARZ-REEL* –40°C to +125°C 8-Lead Plastic SOIC R-8 AD829ARZ-REEL7* –40°C to +125°C 8-Lead Plastic SOIC R-8 AD829JN 0°C to 70°C 8-Lead Plastic PDIP N-8 AD829JR 0°C to 70°C 8-Lead Plastic SOIC R-8 AD829JR-REEL 0°C to 70°C 8-Lead Plastic SOIC R-8 AD829JR-REEL7 0°C to 70°C 8-Lead Plastic SOIC R-8 AD829AQ –40°C to +125°C 8-Lead CERDIP Q-8 AD829SQ –55°C to +125°C 8-Lead CERDIP Q-8 AD829SQ/883B –55°C to +125°C 8-Lead CERDIP Q-8 5962-9312901MPA –55°C to +125°C 8-Lead CERDIP Q-8 AD829SE/883B –55°C to +125°C 20-Lead LCC E-20A 5962-9312901M2A –55°C to +125°C 20-Lead LCC E-20A AD829JCHIPS Die AD829SCHIPS Die
*Z = Pb-free part.
AD829
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