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PDF ADA4857-2 Data sheet ( Hoja de datos )
| Número de pieza | ADA4857-2 | |
| Descripción | High Speed Op Amp | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
FEATURES
High speed
850 MHz, −3 dB bandwidth (G = +1, RL = 1 kΩ, LFCSP)
750 MHz, −3 dB bandwidth (G = +1, RL = 1 kΩ, SOIC)
2800 V/µs slew rate
Low distortion: −88 dBc at 10 MHz (G = +1, RL = 1 kΩ)
Low power: 5 mA/amplifier at 10 V
Low noise: 4.4 nV/√Hz
Wide supply voltage range: 5 V to 10 V
Power-down feature
Available in 3 mm × 3 mm 8-lead LFCSP (single), 8-lead SOIC
(single), and 4 mm × 4 mm 16-lead LFCSP (dual)
APPLICATIONS
Instrumentation
IF and baseband amplifiers
Active filters
ADC drivers
DAC buffers
Ultralow Distortion, Low Power,
Low Noise, High Speed Op Amp
ADA4857-1/ADA4857-2
CONNECTION DIAGRAMS
ADA4857-1
TOP VIEW
(Not to Scale)
PD 1
FB 2
–IN 3
+IN 4
8 +VS
7 OUT
6 NC
5 –VS
NOTES
1. NC = NO CONNECT. DO NOT CONNECT
TO THIS PIN.
2. THE EXPOSED PAD MAY BE CONNECTED
TO GND OR VS.
Figure 1. 8-Lead LFCSP (CP)
ADA4857-1
TOP VIEW
(Not to Scale)
FB 1
–IN 2
+IN 3
–VS 4
8 PD
7 +VS
6 OUT
5 NC
NC = NO CONNECT
Figure 2. 8-Lead SOIC (R)
ADA4857-2
TOP VIEW
(Not to Scale)
–IN1 1
+IN1 2
NC 3
–VS2 4
12 –VS1
11 NC
10 +IN2
9 –IN2
GENERAL DESCRIPTION
The ADA4857 is a unity-gain stable, high speed, voltage feedback
amplifier with low distortion, low noise, and high slew rate. With a
spurious-free dynamic range (SFDR) of −88 dBc at 10 MHz, the
ADA4857 is an ideal solution for a variety of applications, including
ultrasounds, ATE, active filters, and ADC drivers. The Analog
Devices, Inc., proprietary next-generation XFCB process and
innovative architecture enables such high performance amplifiers.
The ADA4857 has 850 MHz bandwidth, 2800 V/µs slew rate, and
settles to 0.1% in 15 ns. With a wide supply voltage range (5 V to
Rev. C
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
NOTES
1. NC = NO CONNECT. DO NOT CONNECT
TO THIS PIN.
2. THE EXPOSED PAD MAY BE CONNECTED
TO GND OR VS.
Figure 3. 16-Lead LFCSP (CP)
10 V), the ADA4857 is an ideal candidate for systems that require
high dynamic range, precision, and speed.
The ADA4857-1 amplifier is available in a 3 mm × 3 mm, 8-lead
LFCSP and a standard 8-lead SOIC. The ADA4857-2 is available in
a 4 mm × 4 mm, 16-lead LFCSP. The LFCSP features an exposed
paddle that provides a low thermal resistance path to the printed
circuit board (PCB). This path enables more efficient heat transfer
and increases reliability. The ADA4857 works over the extended
industrial temperature range (−40°C to +125°C).
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2008–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
Parameter
OUTPUT CHARACTERISTICS
Overdrive Recovery Time
Output Voltage Swing
Output Current
Short-Circuit Current
Capacitive Load Drive
POWER SUPPLY
Operating Range
Quiescent Current
Quiescent Current (Power Down)
Positive Power Supply Rejection
Negative Power Supply Rejection
Conditions
G = +2
RL = 1 kΩ
RL = 100 Ω
Sinking and sourcing
30% overshoot, G = +2
PD ≥ VCC − 2 V
+VS = 4.5 V to 5.5 V, −VS = 0 V
+VS = 5 V, −VS = −0.5 V to +0.5 V
ADA4857-1/ADA4857-2
Min Typ
15
1 to 4
1.1 to 3.9
50
75
10
4.5
4.5
250
−58 −62
−65 −68
Max Unit
ns
V
V
mA
mA
pF
10.5 V
5 mA
350 µA
dB
dB
Rev. C | Page 5 of 20
5 Page 
Data Sheet
–40
G = +2
VS = ±5V
–50 RL= 1kΩ
–60
HD2, f = 10MHz
–70
HD3, f = 10MHz
–80
–90
–100
–110
HD2, f = 1MHz
HD3, f = 1MHz
–120
1234567
OUTPUT VOLTAGE (V p-p)
Figure 20. Harmonic Distortion vs. Output Voltage
8
6.3
VS = ±5V
G = +2
RL= 150Ω
6.2
6.1
VOUT = 2V p-p
6.0
5.9
VOUT = 0.2V p-p
5.8
5.7
1
10 100
FREQUENCY (MHz)
Figure 21. 0.1 dB Flatness vs. Frequency for Various Output Voltages (SOIC)
2.5
4V p-p
VS = ±5V
2.0 RL = 1kΩ
G = +2
1.5
2V p-p
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–2.5
TIME (10ns/DIV)
Figure 22. Large Signal Transient Response for Various Output Voltages (SOIC)
ADA4857-1/ADA4857-2
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
INPUT
–0.4
–0.5
OUTPUT
VOUT = 2V p-p
G = +2
VS = ±5
TIME (5ns/DIV)
Figure 23. Short-Term Settling Time (LFCSP)
6.3
VS = ±5V
G = +2
RL= 150Ω
6.2
6.1
6.0
VOUT = 2V p-p
5.9
VOUT = 0.2V p-p
5.8
5.7
1
10 100
FREQUENCY (MHz)
Figure 24. 0.1 dB Flatness vs. Frequency for Various Output Voltages (LFCSP)
2.5
4V p-p
2.0
1.5
2V p-p
1.0
0.5
VS = ±5V
RL = 1kΩ
G = +1
0
–0.5
–1.0
–1.5
–2.0
–2.5
TIME (10ns/DIV)
Figure 25. Large Signal Transient Response for Various Output Voltages (LFCSP)
Rev. C | Page 11 of 20
11 Page | ||
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| PDF Descargar | [ Datasheet ADA4857-2.PDF ] | |
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