Datasheet ADA4841-1, ADA4841-2 (Analog Devices)

Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifiers Data Sheet ADA4841-1 /ADA4841-2 FEATURES CONNECTION DIAGRAMS Low power: 1.1 mA/amp ADA4841-1 Low wideband noise TOP VIEW NC 1 (Not to Scale) 8 POWER DOWN 2.1 nV/√Hz –IN 2 7 +VS 1.4 pA/√Hz +IN 3 6 VOUT Low 1/f noise –V 4 5 S NC 7 nV/√Hz @ 10 Hz
05614-001
13 pA/√Hz @ 10 Hz
Figure 1. 8-Lead SOIC (R)
Low distortion: −105 dBc @ 100 kHz, VO = 2 V p-p ADA4841-1 High speed VOUT 1 6 +VS 80 MHz, −3 dB bandwidth (G = +1) 12 V/µs slew rate –VS 2 5 POWER DOWN 175 ns settling time to 0.1% Low offset voltage: 0.3 mV maximum +IN 3 4 –IN
05614-099
Rail-to-rail output
Figure 2. 6-Lead SOT-23 (RJ)
Power down Wide supply range: 2.7 V to 12 V ADA4841-2 OUT1 1 8 +VS –IN1 2 7 OUT2 APPLICATIONS +IN1 3 6 –IN2 Low power, low noise signal processing –VS 4 5 +IN2 Battery-powered instrumentation TOP VIEW (Not to Scale) 16-bit PulSAR® ADC drivers NOTES
064
1. FOR 8-LEAD LFCSP_WD, CONNECT EXPOSED PADDLE TO GND.
05614- Figure 3. 8-Lead MSOP (RM), 8-Lead SOIC_N (R), and 8-Lead LFCSP_WD (CP)
GENERAL DESCRIPTION
The ADA4841-1/ADA4841-2 are unity gain stable, low noise 16-bit PulSAR ADCs. and distortion, rail-to-rail output amplifiers that have a quiescent The ADA4841-1/ADA4841-2 packages feature RoHS compliant current of 1.5 mA maximum. In spite of their low power lead finishes. The amplifiers are rated to work over the consumption, these amplifiers offer low wideband voltage industrial temperature range (−40°C to +125°C). noise performance of 2.1 nV/√Hz and 1.4 pA/√Hz current noise, along with excellent spurious-free dynamic range (SFDR) of
–30 VS = ±5V
−105 dBc at 100 kHz. To maintain a low noise environment at
–40 G = +1
lower frequencies, the amplifiers have low 1/f noise of 7 nV/√Hz
) c –50
and 13 pA/√Hz at 10 Hz.
dB ( –60
The ADA4841-1/ADA4841-2 output can swing to less than
TION –70
50 mV of either rail. The input common-mode voltage range
OR T S 2V p-p THIRD
extends down to the negative supply. The ADA4841-1/
–80 C DI
ADA4841-2 can drive up to 10 pF of capacitive load with
NI O –90
minimal peaking.
2V p-p SECOND HARM –100
The ADA4841-1/ADA4841-2 provide the performance required
–110
048 to efficiently support emerging 16-bit to 18-bit ADCs and are ideal for portable instrumentation, high channel count, industrial
–120
05614-
0.01 0.1 1
measurement, and medical applications. The ADA4841-1/
FREQUENCY (MHz)
ADA4841-2 are ideally suited to drive the AD7685/AD7686, Figure 4. Harmonic Distortion
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Document Outline FEATURES APPLICATIONS CONNECTION DIAGRAMS GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION AMPLIFIER DESCRIPTION DC ERRORS NOISE CONSIDERATIONS HEADROOM CONSIDERATIONS CAPACITANCE DRIVE INPUT PROTECTION POWER-DOWN OPERATION APPLICATIONS INFORMATION TYPICAL PERFORMANCE VALUES 16-BIT ADC DRIVER RECONSTRUCTION FILTER LAYOUT CONSIDERATIONS GROUND PLANE POWER SUPPLY BYPASSING OUTLINE DIMENSIONS ORDERING GUIDE