ADA4084-2 30 V, Low Noise, Rail-to-Rail I/O, Low Power Operational Amplifiers

The ADA4084-1 (single), ADA4084-2 (dual), and ADA4084-4 (quad) are single-supply, 10 MHz bandwidth amplifiers featuring rail-to-rail inputs and outputs. They are guaranteed to operate from +3 V to +30 V (or ±1.5 V to ±15 V).

These amplifiers are well suited for single-supply applications requiring both ac and precision dc performance. The combination of wide bandwidth, low noise, and precision makes the ADA4084-1, ADA4084-2, and ADA4084-4 useful in a wide variety of applications, including filters and instrumentation.

Other applications for these amplifiers include portable telecommunications equipment, power supply control and protection, and use as amplifiers or buffers for transducers with wide output ranges. Sensors requiring a rail-to-rail input amplifier include Hall effect, piezoelectric, and resistive transducers.

The ability to swing rail to rail at both the input and output enables designers to build multistage filters in single-supply systems and to maintain high signal-to-noise ratios.

The ADA4084-1, ADA4084-2, and ADA4084-4 are specified over the industrial temperature range of −40°C to +125°C. The single ADA4084-1 is available in the 5-lead SOT-23 and 8-lead SOIC; the dual ADA4084-2 is available in the 8-lead SOIC, 8-lead MSOP, and 8-lead LFCSP surface-mount packages; and the ADA4084-4 is offered in the 14-lead TSSOP and 16-lead LFCSP.

The ADA4084-1, ADA4084-2, and ADA4084-4 are members of a growing series of high voltage, low noise op amps offered by Analog Devices, Inc.

Applications

Battery-powered instrumentation
High-side and low-side sensing
Power supply control and protection
Telecommunications
Digital-to-analog converter (DAC) output amplifier
Analog-to-digital converter (ADC) input buffer

Features and Benefits

Rail-to-rail input/output

Low power: 0.625 mA typical per amplifier at ±15 V

Gain bandwidth product:
15.9 MHz at A_V = 100 typical

Unity-gain crossover:
9.9 MHz typical

−3 dB closed-loop bandwidth:
13.9 MHz typical at ±15 V

Low offset voltage:
100 μV maximum (SOIC)

Unity-gain stable

High slew rate: 4.6 V/μs typical

Low noise:
3.9 nV/√Hz typical at 1 kHz

Amplifiers

SPICE Models

ADA4084 SPICE Macro-Model (Rev. 2.0) .CIR

Data Sheets

Document	note
ADA4084-1/ADA4084-2/ADA4084-4: 30 V, Low Noise, Rail-to-Rail Input/Output, Low Power Operational Amplifiers Data Sheet (Rev. H)	PDF 945.05 K

Application Notes

Document	note
AN-849: Using Op Amps as Comparators (Rev. A)	PDF 117 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADA4084-2ACPZ-R7 Production	8 ld LFCSP (3x3mm, 1.6x1.6mm exposed pad	REEL 1500	-40 to 125C	0	2.85	Y
ADA4084-2ACPZ-RL Production	8 ld LFCSP (3x3mm, 1.6x1.6mm exposed pad	REEL 5000	-40 to 125C	0	2.85	Y
ADA4084-2ARMZ Production	8 ld MSOP	OTH 50	-40 to 125C	3.49	2.85	Y
ADA4084-2ARMZ-R7 Production	8 ld MSOP	REEL 1000	-40 to 125C	0	2.85	Y
ADA4084-2ARMZ-RL Production	8 ld MSOP	REEL 3000	-40 to 125C	0	2.85	Y
ADA4084-2ARZ Production	8 ld SOIC	OTH 98	-40 to 125C	3.49	2.85	Y
ADA4084-2ARZ-R7 Production	8 ld SOIC	REEL 1000	-40 to 125C	0	2.85	Y
ADA4084-2ARZ-RL Production	8 ld SOIC	REEL 2500	-40 to 125C	0	2.85	Y

Evaluation Boards

Part Number	Description	Price	RoHS
EVAL-PRAOPAMP-2CPZ	Dual CP-8 lead LFCSP Evaluation Board	20.19	Y
EVAL-PRAOPAMP-2RMZ	Dual RM-8 lead MSOP Evaluation Board	20.19	Y
EVAL-PRAOPAMP-2RZ	Dual R-8 lead SOIC Evaluation Board	20.19	Y