ADA4841-1 Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier

The ADA4841-1 is a unity gain stable, low noise and distortion, rail-to-rail output amplifier that has a quiescent current of 1.5 mA maximum. Despite its low power consumption, this amplifier offers low wideband voltage noise performance of 2.1 nV/√Hz and 1.4 pA/√Hz current noise, along with excellent spurious-free dynamic range (SFDR) of -105 dBc at 100 kHz. To maintain a low noise environment at lower frequencies, the amplifier has low 1/f noise of 7 nV/√Hz and 13 pA/√Hz at 10 Hz.

The ADA4841-1 output can swing to less than 50 mV of either rail. The input common-mode voltage range extends down to the negative supply. The ADA4841-1 can drive up to 10 pF of capacitive load with minimal peaking.

The ADA4841-1 provides the performance required to efficiently support emerging 16-bit to 18-bit ADCs and are ideal for portable instrumentation, high channel count, industrial measurement, and medical applications. The ADA4841-1 is ideally suited to drive the AD7685/AD7686, 16-bit PulSAR ADCs.

The ADA4841-1 package features RoHS compliant lead finishes. The amplifier is rated to work over the industrial temperature range (−40°C to +125°C).

Features and Benefits

Low power: 1.1 mA/amp

Low wideband noise
2.1 nV/√Hz
1.4 pA/√Hz

Low 1/F noise
7 nV/√Hz @ 10 Hz
13 pA/√Hz @ 10 Hz

Low distortion
-105 dBc @ 100 kHz, VO = 2 V p-p

High speed
80 MHz, -3 dB bandwidth
(G = +1)
12 V/µs slew rate
175 ns settling time to 0.1%

Low offset voltage 0.3 mV max

Rail-to-rail output

Power down

Wide supply range: 2.7 V to 12 V

Amplifiers

Security and Surveillance

Scanning Equipment

SPICE Models

ADA4841 SPICE Macro Model .CIR

Reference Designs

CN0255 Design & Integration Files .ZIP

Data Sheets

Document	note
ADA4841-1/ADA4841-2: Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifiers Data Sheet (Rev. F)	PDF 590 kB

Application Notes

Document	note
AN-931: Understanding PulSAR ADC Support Circuitry (Rev. 0)	PDF 299 kB
AN-402: Replacing Output Clamping Op Amps with Input Clamping Amps	PDF 55 kB
AN-581: Biasing and Decoupling Op Amps in Single Supply Applications (Rev. 0)	PDF 166 kB
AN-417: Fast Rail-to-Rail Operational Amplifiers Ease Design Constraints in Low Voltage High Speed Systems	PDF 228 kB
AN-649: Using the Analog Devices Active Filter Design Tool (Rev. 0)	PDF 5.3 M

User Guides

Document	note
UG-838: Evaluation Board for Single, High Speed Op Amps Offered in 5-Lead SOT-23 and 6-Lead SOT-23 Packages	PDF 184.4 K
UG-755: 8-Lead SOIC Amplifier Evaluation Board User Guide	PDF 276 K

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADA4841-1YRJZ-R2 Production	6 ld SOT-23	REEL 250	-40 to 125C	2.17	2.17	Y
ADA4841-1YRJZ-R7 Production	6 ld SOT-23	REEL 3000	-40 to 125C	0	1.59	Y
ADA4841-1YRZ Production	8 ld SOIC	OTH 98	-40 to 125C	1.87	1.59	Y
ADA4841-1YRZ-R7 Production	8 ld SOIC	REEL 1000	-40 to 125C	0	1.59	Y
ADA4841-1YRZ-RL Production	8 ld SOIC	REEL 2500	-40 to 125C	0	1.59	Y

Evaluation Boards

Part Number	Description	Price	RoHS
EVAL-AD7761FMCZ	Evaluation Board	138	Y
EVAL-AD7768-4FMCZ	Evaluation Board	138	Y
EVAL-AD7768FMCZ	Evaluation Board	138	Y
EVAL-HSOPAMP-1CPZ	Evaluation Board for 8-LD LFCSP	18.25	Y
EVAL-HSOPAMP-1KSZ	Evaluation Bare Board for 5 and 6-lead SC70 Package	18.25	Y
EVAL-HSOPAMP-1RJZ	Evaluation Bare Board for SOT-23 Package	18.25	Y
EVAL-HSOPAMP-1RZ	Evaluation Bare Board for 8-lead SOIC Package	18.25	Y
EVAL-HSOPAMP-E-1RZ	Evaluation Bare Board for 8 Lead SOIC dedicated feedback with epad connection	18.25	Y
EVAL-HSOPAMP-N-1RZ	Evaluation Bare Board for 8 Lead SOIC w/Null or Compensation functionality on Pins 1 and or 8	18.25	Y
EVAL-SDP-CH1Z	Controller Board	199	Y