ADA4805-2 Dual, 0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplifier

The ADA4805-1/ADA4805-2 are high speed voltage feedback, rail-to-rail output amplifiers with an exceptionally low quiescent current of 500 µA, making them ideal for low power, high resolution data conversion systems. Despite being low power, these amplifiers provide excellent overall performance. They offer a high bandwidth of 105 MHz at a gain of +1, a high slew rate of 160 V/µs, and a low input offset voltage of 125 µV (maximum).

A shutdown pin allows further reduction of the quiescent supply current to 2.9 µA. For power sensitive applications, the shutdown mode offers a very fast turn on time of 3 µs. This allows the user to dynamically manage the power of the amplifier by turning the amplifier off between ADC samples.

The Analog Devices, Inc., proprietary extra fast complementary bipolar (XFCB) process allows for both low voltage and low current noise (5.9 nV/√Hz, 0.6 pA/√Hz). The ADA4805-1/ADA4805-2 operate over a wide range of supply voltages from ±1.5 V to ±5 V, as well as single 3 V and 5 V supplies, making them ideal for high speed, low power instruments.

The ADA4805-1 is available in a 6-lead SOT-23 and a 6-lead SC70 package. The ADA4805-2 is available in an 8-lead MSOP package. These amplifiers are rated to work over the industrial temperature range of −40°C to +125°C.

Applications

High resolution, high precision analog-to-digital converter (ADC) drivers
Battery-powered instrumentation
Micropower active filters
Portable point of sales terminals
Active radio frequency identification (RFID) readers
Photo multipliers
ADC reference buffers

Features and Benefits

Low input offset voltage: 125 µV (maximum)

Low input offset voltage drift

0.2 µV/°C (typical)

1.5 µV/°C (maximum)

Ultralow supply current: 500 µA per amplifier

Fully specified at VS = 3 V, 5 V, ±5 V

High speed performance

−3 dB bandwidth: 105 MHz

Slew rate: 160 V/µs

Settling time to 0.1%: 35 ns

Rail-to-rail outputs

See data sheet for additional features

Download the ADA4805-2-EP data sheet

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 upon request

Amplifiers

SPICE Models

ADA4805 SPICE Macro-Model .CIR

Data Sheets

Document	note
ADA4805-1/ADA4805-2: 0.2 μV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplifiers Data Sheet (Rev. B)	PDF 765.26 K
ADA4805-2-EP: Enhanced Product Data Sheet (Rev. 0)	PDF 243.18 K

User Guides

Document	note
UG-886: Universal Evaluation Board for Dual High Speed Op Amps Offered in 8-Lead MSOP	PDF 155.96 K
UG-776: Universal Evaluation Board for Dual High Speed Op Amps Offered in 10-Lead, 3 mm × 3 mm LFCSP	PDF 241.87 K

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADA4805-2ACPZ-R2 Production	10 ld LFCSP (3x3mm)	REEL 250	-40 to 125C	2.39	0	Y
ADA4805-2ACPZ-R7 Production	10 ld LFCSP (3x3mm)	REEL 1500	-40 to 125C	0	1.79	Y
ADA4805-2ARMZ Production	8 ld MSOP	OTH 50	-40 to 125C	2.15	1.64	Y
ADA4805-2ARMZ-R7 Production	8 ld MSOP	REEL 1000	-40 to 125C	0	1.64	Y
ADA4805-2TRMZ-EP Production	8 ld MSOP	OTH 50	-55 to 125C	3.72	2.84	Y
ADA4805-2TRMZ-EPR7 Production	8 ld MSOP	REEL 1000	-55 to 125C	0	2.84	Y

Evaluation Boards

Part Number	Description	Price	RoHS
EVAL-HSAMP-2CPZ-10	Evaluation Bare Board for 10-Lead LFCSP	18.25	Y
EVAL-HSAMP-2CPZ-8	Evaluation Bare Board for 8-Lead LFCSP	18.25	Y
EVAL-HSAMP-2RMZ-10	Evaluation Bare Board for 10-lead MSOP Package	18.25	Y
EVAL-HSAMP-2RMZ-8	Evaluation Bare Board for 8 Lead MSOP	18.25	Y
EVAL-HSAMP-2RZ-8	Evaluation Bare Board for 8 Lead SOIC	18.25	Y