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Analog Devices Semiconductor Electronic Components Datasheet

AD9101 Datasheet

125 MSPS Monolithic Sampling Amplifier

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AD9101 pdf
a
125 MSPS Monolithic
Sampling Amplifier
AD9101
FEATURES
350 MHz Sampling Bandwidth
125 MHz Sampling Rate
Excellent Hold Mode Distortion
–75 dB @ 50 MSPS (25 MHz VIN)
–57 dB @ 125 MSPS (50 MHz VIN)
7 ns Acquisition Time to 0.1%
<1 ps Aperture Jitter
66 dB Feedthrough Rejection @ 50 MHz
3.3 nV/Hz Spectral Noise Density
APPLICATIONS
Direct IF Sampling
Digital Sampling Oscilloscopes
HDTV Cameras
Peak Detectors
Radar/EW/ECM
Spectrum Analysis
Test Equipment/CCD Testers
DDS DAC Deglitcher
GENERAL DESCRIPTION
The AD9101 is an extremely accurate, general purpose, high
speed sampling amplifier. Its fast and accurate acquisition speed
allows for a wide range of frequency vs. resolution performance.
The AD9101 is capable of 8 to 12 bits of accuracy at clock rates
of 125 MSPS or 50 MSPS, respectively. This level of perfor-
mance makes it an ideal driver for almost all 8- to 12-bit A/D
encoders on the market today.
In effect, the AD9101 is a track-and-hold with a post amplifier.
This configuration allows the front end sampler to operate at
relatively low signal amplitudes. This results in dramatic im-
provement in both track and hold mode distortion while keeping
power low.
The gain-of-four output amplifier has been optimized for fast
and accurate large signal step settling characteristics even when
heavily loaded. This amplifier’s fast Settling Time Linearity
(STL) characteristic causes the amplifier to be transparent to
the low signal level distortion of the sampler. When sampled,
output distortion levels reflect only the distortion performance
of the sampler.
Dramatic SNR and distortion improvements can be realized
when using the AD9101 with high speed flash converters. Flash
converters generally have excellent linearity at dc and low fre-
quencies. However, as signal slew rate increases, their perfor-
mance degrades due to the internal comparators’ aperture delay
variations and finite gain bandwidth product.
FUNCTIONAL BLOCK DIAGRAM
SAMPLER
VIN +
CHOLD
AD9101
+
4X
AMP
VOUT
3R
R
CLOCK CLOCK
RTN
The benefits of using a track-and-hold ahead of a flash converter
have been well known for many years. However, before the
AD9101, there was no track-and-hold amplifier with sufficient
bandwidth and linearity to markedly increase the dynamic per-
formance of such flashes as the AD9002, AD9012, AD9020,
and AD9060.
A new application made possible by the AD9101 is direct IF-
to-digital conversion. Utilizing the Nyquist principle, the IF
frequency can be rejected, and the baseband signal can be
recovered. As an example, a 40 MHz IF is modulated by a
10 MHz bandwidth signal. By sampling at 25 MSPS, the signal
of interest is detected.
The AD9101 is offered in commercial and military temperature
ranges. Commercial versions include the AD9101AR in plastic
SOIC and AD9101AE in ceramic LCC. Military devices are
available in ceramic LCC. Contact the factory for availability of
versions in DIP and/or military versions.
PRODUCT HIGHLIGHTS
1. Guaranteed Hold-Mode Distortion
2. 125 MHz Sampling Rate to 8 Bits; 50 MHz to 12 Bits
3. 350 MHz Sampling Bandwidth
4. Super-Nyquist Sampling Capability
5. Output Offset Adjustable
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703


Analog Devices Semiconductor Electronic Components Datasheet

AD9101 Datasheet

125 MSPS Monolithic Sampling Amplifier

No Preview Available !

AD9101 pdf
AD9101–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS (+VS = +5 V, –VS = –5.2 V, RLOAD = 100 , RlN = 50 unless otherwise noted)
Parameter
Conditions
Temp
Test AD9101
Level Min Typ
Max Units
DC ACCURACY
Gain
Offset
Output Resistance
Output Drive Capability
PSRR
Pedestal Sensitivity to Positive Supply
Pedestal Sensitivity to Negative Supply
ANALOG INPUT/OUTPUT
Output Voltage Range
Input Bias Current
Input Capacitance
Input Resistance
CLOCK/CLOCK INPUTS
Input Bias Current
Input Low Voltage (VIL)1
Input High Voltage (VIH)1
TRACK MODE DYNAMICS
Bandwidth (–3 dB)
Slew Rate
Overdrive Recovery Time2 (to 0.1%)
Integrated Output Noise
Input RMS Spectral Noise @ 10 MHz
HOLD MODE DYNAMICS
Worst Harmonic (23 MHz, 50 MSPS)
Worst Harmonic (48 MHz, 100 MSPS)
Worst Harmonic (48 MHz, 100 MSPS)
Worst Harmonic (48 MHz, 100 MSPS)
Worst Harmonic (48 MHz, 125 MSPS)
Sampling Bandwidth (–3 dB)3
Hold Noise4 (RMS)
Droop Rate
Feedthrough Rejection (50 MHz)
TRACK-TO-HOLD SWITCHING
Aperture Delay
Aperture Jitter
Pedestal Offset
Transient Amplitude
Settling Time to 4 mV
Glitch Product5
HOLD-TO-TRACK SWITCHING
Acquisition Time to 0.1%
Acquisition Time to 0.01%
POWER SUPPLY
+VS Current
–VS Current
Power Dissipation
VIN = 0.5 V
VIN = 0.5 V
VIN = 0 V
VIN = 0 V
VS = 0.5 V p-p
VS = 0.5 V p-p
VS = 0.5 V p-p
25°C
Full
25°C
Full
25°C
Full
25°C
Full
Full
Full
25°C
Full
25°C
25°C–TMAX
TMIN
CL/CL = –1.0 V
VIN = 0.5 V p-p
VIN = 0.5 V p-p
Full
Full
Full
VOUT = 1 V p-p
Full
4 Volt Output Step Full
VIN = ± 1 V to 0 V 25°C
(5 MHz–200 MHz) 25°C
25°C
VOUT = 2 V p-p
VOUT = 2 V p-p
VOUT = 2 V p-p
VOUT = 2 V p-p
VOUT = 2 V p-p
VIN = 0.5 V p-p
VOUT = 2 V p-p
VIN = 0 V
VIN = 0 V
VIN = 0 V
VIN = 0 V
VIN = 0 V
2 V Output Step
2 V Output Step
2 V Output Step
25°C
25°C
Full (Ind.)
Full (Mil.)
25°C
25°C
Full
25°C
Full
Full
25°C
25°C
25°C
Full
Full
Full
25°C
25°C
25°C
Full
Full
Full
Full
I
VI
I
VI
V
VI
VI
V
V
VI
I
VI
V
VI
VI
VI
VI
VI
IV
IV
V
V
V
V
IV
IV
IV
V
V
V
I
VI
V
V
V
I
VI
V
V
V
V
IV
IV
VI
VI
VI
3.93 4
3.9
±3
0.4
± 60 ± 70
37 43
4
8
4.07 V/V
4.1 V/V
± 10 mV
± 15 mV
mA
dB
mV/V
mV/V
± 2.4 ± 2.7
±5
2
30 125
25
V
± 15 µA
± 20 µA
pF
k
k
3
–1.8
–1.0
3.6 mA
–1.5 V
–0.8 V
160
1300
250
1800
55
210
3.3
MHz
V/µs
ns
µV
µV/Hz
–75
–62
–57
350
150 × tH
±5
–66
–57
–53
–51
± 18
± 40
dBFS
dBFS
dBFS
dBFS
dBFS
MHz
mV/s
mV/µs
mV/µs
dB
–250
<1
±5
8
4
20
ps
ps rms
± 20 mV
± 35 mV
mV
ns
pV-s
7 ns
11 14 ns
16 ns
55 70 mA
59 73 mA
570 715 mW
–2– REV. 0


Part Number AD9101
Description 125 MSPS Monolithic Sampling Amplifier
Maker Analog Devices
Total Page 12 Pages
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