Ultralow Distortion, Low Power,

Low Noise, High Speed Op Amp

Data Sheet

ADA4857-1/ADA4857-2

Rev. D

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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

CONNECTION DIAGRAMS

Figure 1. 8-Lead LFCSP (CP)

Figure 2. 8-Lead SOIC (R)

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.

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

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).

PD

FB

–IN

+IN

OUT

+VS

NC

–VS

ADA4857-1

TOP VIEW

(Not to Scale)

NOTES

1. NC = NO CONNECT. DO NOT CONNECT

TO THIS PIN.

2. THE EXPOSED PAD MAY BE CONNECTED

TO GND OR VS.

3

4

1

2

6

5

8

7

FB

1

–IN

2

+IN

3

–VS 4

PD

8

+VS

7

OUT

6

NC

5

NC = NO CONNECT

ADA4857-1

TOP VIEW

(Not to Scale)

ADA4857-2

TOP VIEW

(Not to Scale)

12

11

10

1

3

4

9

2

NOTES

1. NC = NO CONNECT. DO NOT CONNECT

TO THIS PIN.

2. THE EXPOSED PAD MAY BE CONNECTED

TO GND OR VS.

–IN1

+IN1

NC

–VS2

–VS1

NC

+IN2

–IN2