ANALOG DEVICES ADA4898-1 Service Manual
High Voltage, Low Noise, Low Distortion,
ADA4898-1/ADA4898-2
NC
1
–IN
2
+IN
3
–V
S
4
PD
8
+V
S
7
V
OUT
6
NC
5
NC = NO CONNECT
TOP VIEW
(Not to Scale)
ADA4898-1
07037-001
07037-050
V
OUT1
1
–IN1
2
+IN1
3
–V
S
4
+V
S
8
V
OUT2
7
–IN2
6
+IN2
5
ADA4898-2
TOP VIEW
(Not to Scale)
07037-002
FREQUENCY ( Hz)
VOLTAGE NOISE (nV/√Hz)
CURRENT NOIS E ( pA/√Hz)
1
0.1
1
10
0.1
1
10
10 100 1k 10k 100k
CURRENT
VOLTAGE
Unity-Gain Stable, High Speed Op Amp
FEATURES
Ultralow noise
0.9 nV/√Hz
2.4 pA/√Hz
1.2 nV/√Hz at 10 Hz
Ultralow distortion: −93 dBc at 500 kHz
Wide supply voltage range: ±5 V to ±16 V
High speed
−3 dB bandwidth: 65 MHz (G = +1)
Slew rate: 55 V/µs
Unity gain stable
Low input offset voltage: 160 µV maximum
Low input offset voltage drift: 1 μV/°C
Low input bias current: −0.1 µA
Low input bias current drift: 2 nA/°C
Supply current: 8 mA
Power-down feature for single 8-lead package
APPLICATIONS
Instrumentation
Active filters
DAC buffers
SAR ADC drivers
Optoelectronics
GENERAL DESCRIPTION
The ADA4898 is an ultralow noise and distortion, unity gain
stable, voltage feedback op amp that is ideal for use in 16-bit and
18-bit systems with power supplies from ±5 V to ±16 V. The
ADA4898 features a linear, low noise input stage and internal
compensation that achieves high slew rates and low noise.
With the wide supply voltage range, low offset voltage, and wide
bandwidth, the ADA4898 is extremely versatile, and it features a
cancellation circuit that reduces input bias current.
The ADA4898 is available in an 8-lead SOIC package that
features an exposed metal paddle to improve power dissipation and
heat transfer to the negative supply plane. This EPA D offers a
significant thermal relief over traditional plastic packages. The
ADA4898 is rated to work over the extended industrial
temperature range of −40°C to +105°C.
Figure 3. Input Voltage Noise and Current Noise vs. Frequency
CONNECTION DIAGRAM
Figure 1. Single 8-Lead ADA4898-1 SOIC_N_EP (RD-8-1)
Figure 2. Dual 8-Lead ADA4898-2 SOIC_N_EP (RD-8-1)
Rev. C
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or 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.
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Tel: 781.329.4700
Fax: 781.461.3113 ©2008-2010 Analog Devices, Inc. All rights reserved.
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