ADA4528-2ARMZ Datasheet, PDF (1/29 Pages) Analog Devices – Precision, Ultralow Noise, RRIO, Zero-Drift Op Amp

Data Sheet
Precision, Ultralow Noise, RRIO,
Zero-Drift Op Amp
ADA4528-1/ADA4528-2
FEATURES
Low offset voltage: 2.5 µV maximum
Low offset voltage drift: 0.015 μV/°C maximum
Low noise
5.6 nV/√Hz at f = 1 kHz, AV = +100
97 nV p-p at f = 0.1 Hz to 10 Hz, AV = +100
Open-loop gain: 130 dB minimum
CMRR: 135 dB minimum
PSRR: 130 dB minimum
Unity-gain crossover: 4 MHz
Gain bandwidth product: 3 MHz at AV = +100
−3 dB closed-loop bandwidth: 6.2 MHz
Single-supply operation: 2.2 V to 5.5 V
Dual-supply operation: ±1.1 V to ±2.75 V
Rail-to-rail input and output
Unity-gain stable
APPLICATIONS
Thermocouple/thermopile
Load cell and bridge transducers
Precision instrumentation
Electronic scales
Medical instrumentation
Handheld test equipment
GENERAL DESCRIPTION
The ADA4528-1/ADA4528-2 are ultralow noise, zero-drift
operational amplifiers featuring rail-to-rail input and output
swing. With an offset voltage of 2.5 μV, offset voltage drift of
0.015 μV/°C, and typical noise of 97 nV p-p (0.1 Hz to 10 Hz,
AV = +100), the ADA4528-1/ADA4528-2 are well suited for
applications in which error sources cannot be tolerated.
The ADA4528-1/ADA4528-2 have a wide operating supply range
of 2.2 V to 5.5 V, high gain, and excellent CMRR and PSRR
specifications, which make it ideal for applications that require
precision amplification of low level signals, such as position and
pressure sensors, strain gages, and medical instrumentation.
The ADA4528-1/ADA4528-2 are specified over the extended
industrial temperature range (−40°C to +125°C). The ADA4528-1
and ADA4528-2 are available in 8-lead MSOP and 8-lead
LFCSP packages.
For more information about the ADA4528-1/ADA4528-2,
see the AN-1114 Application Note, Lowest Noise Zero-Drift
Amplifier Has 5.6 nV/√Hz Voltage Noise Density.
Rev. D
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PIN CONNECTION DIAGRAMS
NIC 1
8 NIC
–IN 2 ^ADA4528-1 7 V+
+IN 3
TOP VIEW
(Not to Scale)
6 OUT
V– 4
5 NIC
NOTES
1. NIC = NO INTERNAL CONNECTION.
Figure 1. ADA4528-1 Pin Configuration, 8-Lead MSOP
NIC 1
–IN 2
+IN 3
V– 4
ADA4528-1
TOP VIEW
(Not to Scale)
8 NIC
7 V+
6 OUT
5 NIC
NOTES
1. NIC = NO INTERNAL CONNECTION.
2. CONNECT THE EXPOSED PAD TO
V– OR LEAVE IT UNCONNECTED.
Figure 2. ADA4528-1 Pin Configuration, 8-Lead LFCSP
For ADA4528-2 pin connections and for more information about
the pin connections for these products, see the Pin Configurations
and Function Descriptions section.
100
V_SY = 5V
A_V = 1
V_CM = V_SY/2
10
1
1
10
100
1k
10k 100k
1M
10M
FREQUENCY (Hz)
Figure 3. Voltage Noise Density vs. Frequency
Table 1. Analog Devices, Inc., Zero-Drift Op Amp Portfolio¹
Ultralow
Type Noise
Low 16 V
30 V
Micropower Power Operating Operating
(<20 µA) (<1 mA) Voltage Voltage
Single ADA4528-1 ADA4051-1 AD8628 AD8638 ADA4638-1
AD8538
Dual ADA4528-2 ADA4051-2 AD8629 AD8639
AD8539
Quad
AD8630
1 _{See www.analog.com for the latest selection of zero-drift operational amplifiers.}
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