ADA4897-1-EP/ADA4897-2-EP: 1 nV/?Hz, Low Power, Rail-to-Rail Output Amplifiers0 pages

1 nV/√Hz, Low Power,
Rail-to-Rail Output Amplifiers
ADA4897-1-EP/ADA4897-2-EP

FEATURES
Low wideband noise
1 nV/√Hz
2.8 pA/√Hz
Low 1/f noise: 2.4 nV/√Hz at 10 Hz
Low distortion: −115 dBc at 100 kHz, VOUT = 2 V p-p
Low power: 3 mA per amplifier
Low input offset voltage: 0.5 mV maximum
High speed
−3 dB bandwidth: 230 MHz (G = +1)
Slew rate: 120 V/μs
Settling time to 0.1%: 45 ns
Rail-to-rail output
Wide supply range: 3 V to 10 V
Disable feature

The ADA4897-1-EP is available in 6-lead SOT-23 package and
the ADA4897-2-EP is available in a 10-lead MSOP package. The
ADA4897-1-EP/ADA4897-2-EP operate over the extended
industrial temperature range of −55°C to +125°C. Additional
application and technical information can be found in the
ADA4897-1/ADA4897-2 data sheet.

FUNCTIONAL BLOCK DIAGRAM
ADA4897-1-EP
OUT 1

+VS

–VS 2

5

DISABLE

+IN 3

4

–IN

Figure 1. 6-Lead SOT-23 (ADA4897-1-EP)
8

ENHANCED PRODUCT FEATURES

VS = ±5V

APPLICATIONS

VOLTAGE NOISE (nV/√Hz)

7

Supports defense and aerospace applications (AQEC standard)
Extended industrial temperature range (−55°C to +125°C)
Controlled manufacturing baseline
1 assembly/test site
1 fabrication site
Enhanced product change notification
Qualification data available on request

6
5
4
3
2

0

1

10

100

1k

10k

100k

1M

5M

FREQUENCY (Hz)

09448-102

1

Low noise preamplifier
Ultrasound amplifiers
PLL loop filters
High performance ADC drivers
DAC buffers

Figure 2. Voltage Noise vs. Frequency

Table 1. Other Low Noise Amplifiers

GENERAL DESCRIPTION
The ADA4897-1-EP/ADA4897-2-EP are unity-gain stable, low
noise, rail-to-rail output, high speed voltage feedback amplifiers that
have a quiescent current of 3 mA. With a 1/f noise of 2.4 nV/
√Hz at 10 Hz and a spurious-free dynamic range of −80 dBc at
2 MHz, these amplifiers are ideal solutions 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 such high performance amplifiers.

Part No.
AD797
AD8021
AD8099
AD8045
ADA4899-1
ADA4898-1/
ADA4898-2

The ADA4897-1-EP/ADA4897-2-EP have 230 MHz bandwidth,
120 V/μs slew rate, and settle to 0.1% in 45 ns. With a wide
supply voltage range of 3 V to 10 V, the ADA4897-1-EP/
ADA4897-2-EP are ideal candidates for systems that require
high dynamic range, precision, low power, and high speed.

Part No.
AD7944
AD7985
AD7986

Rev. 0

6

09448-101

Enhanced Product

VN (nV/√Hz)
At 1 kHz
At 100 kHz
0.9
0.9
5
2.1
3
0.95
6
3
1.4
1
0.9
0.9

BW (MHz)
8
490
510
1000
600
65

Supply
Voltage (V)
10 to 30
5 to 24
5 to 12
3.3 to 12
5 to 12
10 to 32

Table 2. Complementary ADCs
Bits
14
16
18

Speed (MSPS)
2.5
2.5
2

Power (mW)
15.5
15.5
15

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