AD8045_16 Datasheet, PDF (1/26 Pages) Analog Devices – 3 nV/√Hz, Ultralow Distortion, High Speed Op Amp

Data Sheet
FEATURES
Ultralow distortion
SFDR
−101 dBc at 5 MHz
−90 dBc at 20 MHz
−63 dBc at 70 MHz
Third-order intercept
43 dBm at 10 MHz
Low noise
3 nV/√Hz
3 pA/√Hz
High speed
1 GHz, −3 dB bandwidth (G = +1)
1350 V/µs slew rate
7.5 ns settling time to 0.1%
Standard and low distortion pinout
Supply current: 15 mA
Offset voltage: 1.0 mV max
Wide supply voltage range: 3.3 V to 12 V
APPLICATIONS
Instrumentation
IF and baseband amplifiers
Active filters
ADC drivers
DAC buffers
GENERAL DESCRIPTION
The AD8045 is a unity-gain stable voltage feedback amplifier
with ultralow distortion, low noise, and high slew rate. With a
spurious-free dynamic range of −90 dBc at 20 MHz, the AD8045 is
an ideal solution in a variety of applications, including ultrasound,
automated test equipment (ATE), active filters, and analog-to-
digital converter (ADC) drivers. The Analog Devices, Inc.,
proprietary next generation XFCB process and innovative
architecture enable such high performance amplifiers.
The AD8045 features a low distortion pinout for the LFCSP,
which improves second harmonic distortion and simplifies the
layout of the circuit board.
The AD8045 has a 1 GHz bandwidth, a 1350 V/µs slew rate, and
settles to 0.1% in 7.5 ns. With a wide supply voltage range (3.3 V
to 12 V) and a low offset voltage (200 µV), the AD8045 is an
ideal candidate for systems that require high dynamic range,
precision, and high speed.
The AD8045 amplifier is available in a 3 mm × 3 mm LFCSP
and the standard 8-lead SOIC. Both packages feature an exposed
Rev. B
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3 nV/√Hz, Ultralow Distortion,
High Speed Op Amp
AD8045
CONNECTION DIAGRAMS
AD8045
TOP VIEW
(Not to Scale)
NIC 1
FEEDBACK 2
8 +V_S
7 OUTPUT
–IN 3
+IN 4
6 NIC
5 –V_S
NOTES
1. NIC = NO INTERNAL CONNECTION.
Figure 1. 8-Lead AD8045 LFCSP (CP-8)
AD8045
TOP VIEW
(Not to Scale)
FEEDBACK 1
–IN 2
+IN 3
–V_S 4
8 NIC
7 +V_S
6 OUTPUT
5 NIC
NOTES
1. NIC = NO INTERNAL CONNECTION.
Figure 2. 8-Lead AD8045 SOIC/EP (RD-8)
paddle that provides a low thermal resistance path to the
printed circuit board (PCB). This enables more efficient heat
transfer and increases reliability. The AD8045 works over the
extended industrial temperature range (−40°C to +125°C).
–20
G = +1
–30 ^VS ^{= ±5V}
V_OUT = 2V p-p
–40 ^RL ^{= 1kΩ}
R_S = 100Ω
–50
–60
–70
–80
–90
–100
HD3 LFCSP
HD2 LFCSP
–110
–120
0.1
1
10
100
FREQUENCY (MHz)
Figure 3. Harmonic Distortion vs. Frequency for Various Packages
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