Low Power, 1 nV/√Hz, G ≥ 10 Stable,

Rail-to-Rail Output Amplifier

Data Sheet

ADA4895-2

Rev. 0

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FEATURES

Low wideband noise

1 nV/√Hz

2.6 pA/√Hz

Low 1/f noise: 2 nV/√Hz at 10 Hz

Low distortion (SFDR): −96 dBc at 100 kHz, V

Low power: 3 mA per amplifier

Low input offset voltage: 350 µV maximum

High speed

236 MHz, −3 dB bandwidth (G = +10)

943 V/µs slew rate

22 ns settling time to 0.1%

Rail-to-rail output

Wide supply range: 3 V to 10 V

Disable feature

APPLICATIONS

Low noise preamplifier

Ultrasound amplifiers

PLL loop filters

High performance ADC drivers

DAC buffers

GENERAL DESCRIPTION

The ADA4895-2 is a dual, high speed voltage feedback amplifier

that is gain ≥ 10 stable with low input noise, rail-to-rail output,

and quiescent current of 3 mA per amplifier. With a 1/f noise of

2 nV/√Hz at 10 Hz and a spurious-free dynamic range of −72 dBc

at 2 MHz, the ADA4895-2 is an ideal solution in a variety of

applications, including ultrasound, low noise preamplifiers, and

drivers of high performance ADCs. The Analog Devices, Inc.,

proprietary next generation SiGe bipolar process and innovative

architecture enable this high performance amplifier.

The ADA4895-2 has a large signal bandwidth of 146 MHz at a gain

of +10 with a slew rate of 943 V/µs, and settles to 0.1% in 22 ns.

The wide supply voltage range (3 V to 10 V) of the ADA4895-2

makes this amplifier an ideal candidate for systems that require

high dynamic range, high gain, precision, and high speed.

The ADA4895-2 is available in a 10-lead MSOP package and

operates over the extended industrial temperature range of

−40°C to +125°C.

FUNCTIONAL BLOCK DIAGRAM

OUT1

1

–IN1

2

+IN1

3

DISABLE1

5

10

OUT2

9

–IN2

8

+IN2

7

DISABLE2

6

ADA4895-2

Figure 1. 10-Lead MSOP

0

1

2

3

4

5

0

16

8

24

32

40

1

10

100

1k

10k

100k

1M

FREQUENCY (Hz)

VOLTAGE

CURRENT

Figure 2. Input Voltage and Current Noise vs. Frequency

Table 1. Other Low Noise Amplifiers1

Part No.

(nV/√Hz)

(nV/√Hz)

BW (MHz)

Supply

Voltage (V)

AD8021

4.2

2.1

490

5 to 24

AD8045

6

3

1000

3.3 to 12

AD8099

7

0.95

510

5 to 12

ADA4841-1/

ADA4841-2

2.2

2.1

80

2.7 to 12

ADA4896-2

1

1

230

3 to 10

ADA4897-1/

ADA4897-2

1

1

230

3 to 10

ADA4898-1/

ADA4898-2

0.9

0.9

65

10 to 32

ADA4899-1

1.4

1

600

5 to 12

COMPANION PRODUCTS

ADCs: AD7944 (14-bit), AD7985 (16-bit), AD7986 (18-bit)

Additional companion products on the ADA4895-2 product page