Ultralow Distortion, Low Power,
Low Noise, High Speed Op Amp
ADA4857-1/ADA4857-2
Data Sheet
FEATURES
CONNECTION DIAGRAMS
ADA4857-1
High speed
TOP VIEW
(Not to Scale)
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)
PD
FB
1
2
3
4
8
7
6
5
+V
S
OUT
NC
–IN
+IN
–V
S
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
APPLICATIONS
TOP VIEW
(Not to Scale)
Instrumentation
IF and baseband amplifiers
Active filters
FB
–IN
+IN
1
2
3
4
8
7
6
5
PD
+V
S
OUT
NC
ADC drivers
–V
S
DAC buffers
NC = NO CONNECT
Figure 2. 8-Lead SOIC (R)
ADA4857-2
TOP VIEW
(Not to Scale)
–IN1
+IN1
NC
1
2
3
4
12 –V
S1
11 NC
10
9
+IN2
–IN2
–V
S2
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)
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.
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).
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. D
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rights of third parties that may result from its use. Specifications subject to change without notice. No
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Tel: 781.329.4700 ©2008–2017 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
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