Datasheet AD8045 (Analog Devices)

3 nV/√Hz, Ultralow Distortion, High Speed Op Amp Data Sheet AD8045 FEATURES CONNECTION DIAGRAMS Ultralow distortion AD8045 TOP VIEW SFDR (Not to Scale) −101 dBc at 5 MHz NIC 1 8 +VS −90 dBc at 20 MHz FEEDBACK 2 7 OUTPUT −63 dBc at 70 MHz –IN 3 6 NIC Third-order intercept +IN 4 5 –VS 43 dBm at 10 MHz
001 0-
NOTES Low noise 1. NIC = NO INTERNAL CONNECTION.
04814-
3 nV/√Hz
Figure 1. 8-Lead AD8045 LFCSP (CP-8)
3 pA/√Hz AD8045 High speed TOP VIEW (Not to Scale) 1 GHz, −3 dB bandwidth (G = +1) FEEDBACK 1 8 NIC 1350 V/µs slew rate –IN 2 7 +VS 7.5 ns settling time to 0.1% +IN 3 6 OUTPUT Standard and low distortion pinout –VS 4 5 NIC Supply current: 15 mA
002 0-
NOTES Offset voltage: 1.0 mV max 1. NIC = NO INTERNAL CONNECTION.
04814-
Wide supply voltage range: 3.3 V to 12 V
Figure 2. 8-Lead AD8045 SOIC/EP (RD-8)
APPLICATIONS Instrumentation IF and baseband amplifiers Active filters ADC drivers DAC buffers GENERAL DESCRIPTION
The AD8045 is a unity-gain stable voltage feedback amplifier paddle that provides a low thermal resistance path to the with ultralow distortion, low noise, and high slew rate. With a printed circuit board (PCB). This enables more efficient heat spurious-free dynamic range of −90 dBc at 20 MHz, the AD8045 is transfer and increases reliability. The AD8045 works over the an ideal solution in a variety of applications, including ultrasound, extended industrial temperature range (−40°C to +125°C). automated test equipment (ATE), active filters, and analog-to-
–20
digital converter (ADC) drivers. The Analog Devices, Inc.,
G = +1 –30 VS = ±5V
proprietary next generation XFCB process and innovative
VOUT = 2V p-p –40 RL = 1k
Ω architecture enable such high performance amplifiers.
RS = 100
Ω
–50
The AD8045 features a low distortion pinout for the LFCSP,
–60
which improves second harmonic distortion and simplifies the
–70
layout of the circuit board.
–80
The AD8045 has a 1 GHz bandwidth, a 1350 V/µs slew rate, and
HD3 LFCSP –90
settles to 0.1% in 7.5 ns. With a wide supply voltage range (3.3 V
HD2 LFCSP –100
to 12 V) and a low offset voltage (200 µV), the AD8045 is an
HARMONIC DISTORTION (dBc)
ideal candidate for systems that require high dynamic range,
–110
precision, and high speed.
–120 0.1 1 10 100
The AD8045 amplifier is available in a 3 mm × 3 mm LFCSP
FREQUENCY (MHz)
04814-0-079 Figure 3. Harmonic Distortion vs. Frequency for Various Packages and the standard 8-lead SOIC. Both packages feature an exposed
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Document Outline Features Applications Connection Diagrams General Description Table of Contents Revision History Specifications with ±5 V Supply Specifications with +5 V Supply Absolute Maximum Ratings Thermal Resistance Maximum Power Dissipation ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Circuit Configurations Wideband Operation Theory of Operation Frequency Response DC Errors Output Noise Applications Information Low Distortion Pinout High Speed ADC Driver 90 MHz Active Low-Pass Filter (LPF) Printed Circuit Board Layout Signal Routing Power Supply Bypassing Grounding Exposed Paddle Driving Capacitive Loads Outline Dimensions Ordering Guide