How it Works
Analog Devices
Loading...
AD849SQ-883B
Datasheet
8 pgs249.58 Kb0

Analog Devices AD849SQ-883B, AD849SQ, AD849JR, AD849JN, AD849AQ Datasheet

...
REV. B
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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
a
AD848/AD849
High Speed, Low Power
Monolithic Op Amp
FEATURES 725 MHz Gain Bandwidth – AD849 175 MHz Gain Bandwidth – AD848
4.8 mA Supply Current 300 V/ms Slew Rate 80 ns Settling Time to 0.1% for a 10 V Step – AD849 Differential Gain: AD848 = 0.07%, AD849 = 0.08% Differential Phase: AD848 = 0.088, AD849 = 0.048 Drives Capacitive Loads
DC PERFORMANCE 3 nV/√Hz Input Voltage Noise – AD849 85 V/mV Open Loop Gain into a 1 kV Load – AD849 1 mV max Input Offset Voltage Performance Specified for 65 V and 615 V Operation Available in Plastic, Hermetic Cerdip and Small Outline
Packages. Chips and MIL-STD-883B Parts Available.
Available in Tape and Reel in Accordance with
EIA-481A Standard
APPLICATIONS Cable Drivers 8- and 10-Bit Data Acquisition Systems Video and R
F
Amplification
Signal Generators
PRODUCT DESCRIPTION
The AD848 and AD849 are high speed, low power monolithic operational amplifiers. The AD848 is internally compensated so that it is stable for closed loop gains of 5 or greater. The AD849 is fully decompensated and is stable at gains greater than 24. The AD848 and AD849 achieve their combination of fast ac and good dc performance by utilizing Analog Devices’ junction isolated complementary bipolar (CB) process. This process enables these op amps to achieve their high speed while only requiring 4.8 mA of current from the power supplies.
The AD848 and AD849 are members of Analog Devices’ family of high speed op amps. This family includes, among others, the AD847 which is unity gain stable, with a gain bandwidth of 50 MHz. For more demanding applications, the AD840, AD841 and AD842 offer even greater precision and greater output current drive.
The AD848 and AD849 have good dc performance. When operating with ±5 V supplies, they offer open loop gains of 13 V/mV (AD848 with a 500 Ω load) and low input offset voltage of 1 mV maximum. Common-mode rejection is a minimum of 92 dB. Output voltage swing is ± 3 V even into loads as low as 150 Ω.
APPLICATIONS HIGHLIGHTS
1. The high slew rate and fast settling time of the AD848 and AD849 make them ideal for video instrumentation circuitry, low noise pre-amps and line drivers.
2. In order to meet the needs of both video and data acquisition applications, the AD848 and AD849 are optimized and tested for ±5 V and ±15 V power supply operation.
3. Both amplifiers offer full power bandwidth greater than 20 MHz (for 2 V p-p with ± 5 V supplies).
4. The AD848 and AD849 remain stable when driving any capacitive load.
5. Laser wafer trimming reduces the input offset voltage to 1 mV maximum on all grades, thus eliminating the need for external offset nulling in many applications.
6. The AD848 is an enhanced replacement for the LM6164 series and can function as a pin-for-pin replacement for many high speed amplifiers such as the HA2520/2/5 and EL2020 in applications where the gain is 5 or greater.
CONNECTION DIAGRAMS
Plastic (N),
Small Outline (R) and
Cerdip (Q) Packages
1 2 3 4
8 7 6 5TOP VIEW
(Not to Scale)
NC = NO CONNECT
NULL
NC
OUTPUT
+V
S
NULL –IN +IN
–V
S
AD848/49
20-Terminal LCC Pinout
NC = NO CONNECT
NC
NC
NC
OFFSET
NULL
NC
V+
NC
NC
NC
–IN
NC
NC
+IN
NC NC
NC
NC V–
1418 1617 15
19 20
3
1 2
78465
13 12
9
11 10
TOP VIEW
(Not to Scale)
AD848SE/883B
OFFSET
NULL
OUTPUT
REV. B
–2–
AD848/AD849–SPECIFICA TIONS
AD848J AD848A/S
Model Conditions V
S
Min Typ Max Min Typ Max Units
INPUT OFFSET VOLTAGE
1
±5 V 0.2 1 0.2 1 mV ±15 V 0.5 2.3 0.5 2.3 mV
T
MIN
to T
MAX
±5 V 1.5 2 mV ±15 V 3.0 3.5 mV
Offset Drift ± 5 V, ±15 V 7 7 µV/°C
INPUT BIAS CURRENT ± 5 V, ±15 V 3.3 6.6 3.3 6.6/5 µA
T
MIN
to T
MAX
± 5 V, ±15 V 7.2 7.5 µA
INPUT OFFSET CURRENT ± 5 V, ±15 V 50 300 50 300 nA
T
MIN
to T
MAX
± 5 V, ±15 V 400 400 nA
Offset Current Drift ± 5 V, ±15 V 0.3 0.3 nA/°C
OPEN LOOP GAIN V
O
= ±2.5 V ±5V
R
LOAD
= 500 Ω 9 13 9 13 V/mV
T
MIN
to T
MAX
7 7/5 V/mV
R
LOAD
= 150 Ω 8 8 V/mV
V
OUT
= ±10 V ±15 V
R
LOAD
= 1 kΩ 12 20 12 20 V/mV
T
MIN
to T
MAX
8 8/6 V/mV
DYNAMIC PERFORMANCE
Gain Bandwidth A
VCL
≥ 5 ±5 V 125 125 MHz
±15 V 175 175 MHz
Full Power Bandwidth
2
VO = 2 V p-p,
R
L
= 500 Ω±5 V 24 24 MHz
V
O
= 20 V p-p,
R
L
= 1 kΩ±15 V 4.7 4.7 MHz
Slew Rate ±5 V 200 200 V/µs
R
LOAD
= 1 kΩ±15 V 225 300 225 300 V/µs
Settling Time to 0.1% –2.5 V to +2.5 V ±5 V 65 65 ns
10 V Step, A
V
= –4 ±15 V 100 100 ns
Phase Margin C
LOAD
= 10 pF ±15 V
R
LOAD
= 1 kΩ 60 60 Degrees DIFFERENTIAL GAIN f = 4.4 MHz ±15 V 0.07 0.07 % DIFFERENTIAL PHASE f = 4.4 MHz ±15 V 0.08 0.08 Degree COMMON-MODE REJECTION V
CM
= ±2.5 V ±5 V 92 105 92 105 dB
V
CM
= ±12 V ±15 V 92 105 92 105 dB
T
MIN
to T
MAX
88 88 dB
POWER SUPPLY REJECTION V
S
= ± 4.5 V to ±18 V 85 98 85 98 dB
T
MIN
to T
MAX
80 80 dB INPUT VOLTAGE NOISE f = 10 kHz ±15 V 5 5 nV/√Hz INPUT CURRENT NOISE f = 10 kHz ±15 V 1.5 1.5 pA/√Hz INPUT COMMON-MODE
VOLTAGE RANGE ± 5 V +4.3 +4.3 V
–3.4 –3.4 V
± 15 V +14.3 +14.3 V
–13.4 –13.4 V
OUTPUT VOLTAGE SWING R
LOAD
= 500 Ω±5 V 3.0 3.6 3.0 3.6 ±V
R
LOAD
= 150 Ω±5V 2.5 3 2.5 3 ±V
R
LOAD
= 50 Ω±5 V 1.4 1.4 ±V
R
LOAD
= 1 kΩ±15 V 12 12 ±V
R
LOAD
= 500 Ω±15 V 10 10 ±V SHORT CIRCUIT CURRENT ± 15 V 32 32 mA INPUT RESISTANCE 70 70 kΩ INPUT CAPACITANCE 1.5 1.5 pF OUTPUT RESISTANCE Open Loop 15 15 Ω POWER SUPPLY
Operating Range 64.5 618 64.5 618 V Quiescent Current ± 5 V 4.8 6.0 4.8 6.0 mA
T
MIN
to T
MAX
7.4 7.4/8.3 mA
±15 V 5.1 6.8 5.1 6.8 mA
T
MIN
to T
MAX
8.0 8.0/9.0 mA
NOTES
1
Input offset voltage specifications are guaranteed after 5 minutes at TA = +25°C.
2
Full power bandwidth = slew rate/2 π V
PEAK
. Refer to Figure 1.
All min and max specifications are guaranteed. Specifications in boldface are tested on all production units at final electrical test. All others are guaranteed but not necessarily tested. Specifications subject to change without notice.
(@ TA = +258C, unless otherwise noted)
REV. B
–3–
AD849J AD849A/S
Model Conditions V
S
Min Typ Max Min Typ Max Units
INPUT OFFSET VOLTAGE
1
±5 V 0.3 1 0.1 0.75 mV ±15 V 0.3 1 0.1 0.75 mV
T
MIN
to T
MAX
±5 V 1.3 1.0 mV ±15 V 1.3 1.0 mV
Offset Drift ±5 V, ±15 V 2 2 µV/°C
INPUT BIAS CURRENT ±5 V, ± 15 V 3.3 6.6 3.3 6.6/5 µA
T
MIN
to T
MAX
±5 V, ± 15 V 7.2 7.5 µA
INPUT OFFSET CURRENT ±5 V, ± 15 V 50 300 50 300 nA
T
MIN
to T
MAX
±5 V, ± 15 V 400 400 nA
Offset Current Drift ±5 V, ± 15 V 0.3 0.3 nA/°C
OPEN LOOP GAIN V
O
= ±2.5 V ±5V
R
LOAD
= 500 Ω 30 50 30 50 V/mV
T
MIN
to T
MAX
20 20/15 V/mV
R
LOAD
= 150 Ω 32 32 V/mV
V
OUT
= ±10 V ±15 V
R
LOAD
= 1 kΩ 45 85 45 85 V/mV
T
MIN
to T
MAX
30 30/25 V/mV
DYNAMIC PERFORMANCE
Gain Bandwidth A
VCL
≥ 25 ±5 V 520 520 MHz
±15 V 725 725 MHz
Full Power Bandwidth
2
VO = 2 V p-p,
R
L
= 500 Ω±5 V 20 20 MHz
V
O
= 20 V p-p,
R
L
= 1 kΩ±15 V 4.7 4.7 MHz
Slew Rate ±5 V 200 200 V/µs
R
LOAD
= 1 kΩ±15 V 225 300 225 300 V/µs
Settling Time to 0.1% –2.5 V to +2.5 V ±5 V 65 65 ns
10 V Step, A
V
= –24 ±15 V 80 80 ns
Phase Margin C
LOAD
= 10 pF ±15 V
R
LOAD
= 1 kΩ 60 60 Degrees DIFFERENTIAL GAIN f = 4.4 MHz ±15 V 0.08 0.08 % DIFFERENTIAL PHASE f = 4.4 MHz ±15 V 0.04 0.04 Degrees COMMON-MODE REJECTION V
CM
= ±2.5 V ±5 V 100 115 100 115 dB
V
CM
= ±12 V ±15 V 100 115 100 115 dB
T
MIN
to T
MAX
96 96 dB
POWER SUPPLY REJECTION V
S
= ±4.5 V to ±18 V 98 120 98 120 dB
T
MIN
to T
MAX
94 94 dB INPUT VOLTAGE NOISE f = 10 kHz ±15 V 3 3 nV/√Hz INPUT CURRENT NOISE f = 10 kHz ±15 V 1.5 1.5 pA/√Hz INPUT COMMON-MODE
VOLTAGE RANGE ± 5 V +4.3 +4.3 V
–3.4 –3.4 V
± 15 V +14.3 +14.3 V
–13.4 –13.4 V
OUTPUT VOLTAGE SWING R
LOAD
= 500 Ω±5 V 3.0 3.6 3.0 3.6 ±V
R
LOAD
= 150 Ω±5V 2.5 3 2.5 3 ±V
R
LOAD
= 50 Ω±5 V 1.4 1.4 ±V
R
LOAD
= 1 kΩ±15 V 12 12 ± V
R
LOAD
= 500 Ω±15 V 10 10 ±V SHORT CIRCUIT CURRENT ±15 V 32 32 mA INPUT RESISTANCE 25 25 kΩ INPUT CAPACITANCE 1.5 1.5 pF OUTPUT RESISTANCE Open Loop 15 15 Ω POWER SUPPLY
Operating Range 64.5 618 64.5 618 V Quiescent Current ±5 V 4.8 6.0 4.8 6.0 mA
T
MIN
to T
MAX
7.4 7.4/8.3 mA
±15 V 5.1 6.8 5.1 6.8 mA
T
MIN
to T
MAX
8.0 8.0/9.0 mA
NOTES
1
Input offset voltage specifications are guaranteed after 5 minutes at TA = +25°C.
2
Full power bandwidth = slew rate/2 π V
PEAK
. Refer to Figure 1.
All min and max specifications are guaranteed. Specifications in boldface are tested on all production units at final electrical test. All others are guaranteed but not necessarily tested. Specifications subject to change without notice.
AD848/AD849
Loading...
+ 5 hidden pages
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use