AD9101AE Analog Devices Inc, AD9101AE Datasheet

AD9101AE

Manufacturer Part Number

AD9101AE

Description

Manufacturer

Analog Devices Inc

Datasheet

1.AD9101AE.pdf (12 pages)

Specifications of AD9101AE

Number Of Sample And Hold Elements

Power Supply Requirement

Dual

Single Supply Voltage (typ)

Not RequiredV

Single Supply Voltage (min)

Not RequiredV

Single Supply Voltage (max)

Not RequiredV

Lead Free Status / RoHS Status

Not Compliant

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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.

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.

FEATURES

350 MHz Sampling Bandwidth

125 MHz Sampling Rate

Excellent Hold Mode Distortion

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

–75 dB @ 50 MSPS (25 MHz V

–57 dB @ 125 MSPS (50 MHz V

)

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. Using 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

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703

CLOCK

SAMPLER

FUNCTIONAL BLOCK DIAGRAM

–

CLOCK

125 MSPS Monolithic

World Wide Web Site: http://www.analog.com

Sampling Amplifier

HOLD

RTN

–

AMP

AD9101

OUT

Related parts for AD9101AE

AD9101AE Summary of contents

Page 1

... 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 ...

Page 2

AD9101–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter 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 ...

Page 3

... Temperature Package Model Range Description AD9101AR – +85 C Plastic SOIC AD9101AE – +85 C LCC AD9101SE – +125 C LCC CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. ...

Page 4

AD9101 Acquisition Time is the amount of time it takes the AD9101 to reacquire the analog input when switching from hold to track mode. The interval starts at the 50% clock transition point and ends when the input signal is ...

Page 5

THEORY OF OPERATION The AD9101 employs a new and unique track-and-hold archi- tecture. Previous commercially available high speed track-and- holds used an open loop input buffer, followed by a diode bridge, hold capacitor and output buffer (closed or open loop) ...

Page 6

AD9101 The architecture of the AD9101 minimizes hold mode distor- tion over its specified frequency range example, in track mode the worst harmonic generated for a 20 MHz input tone is typically –65 dBFS. In hold mode, under ...

Page 7

It operates on a single negative supply with the input range from – connecting Pins 1 and 2 (RTN +0.33 V level, rather than its usual ground connection, a ...

Page 8

AD9101 Deglitcher Many recently announced video-speed digital-to-analog con- verters feature very low glitch impulse. This is the result of de- sign emphasis on spurious free dynamic range (SFDR), a key spec for the emerging direct digital synthesis (DDS) market. These ...

Page 9

RTN OUT 2 C RTN B– AD9101 3 – – GND GND GND 8 – ...

Page 10

AD9101 – Typical Performance Curves Gain vs. Frequency (Track Mode) Track-to-Hold-to-Track Transients Settling Tolerance vs. Acquisition Time Hold Mode Distortion vs. Analog Input Frequency Feedthrough vs. Input Frequency Power Supply Rejection Ratio vs. Frequency –10– Recommended R vs. C for ...

Page 11

SOIC 0.512 (13.00) 0.496 (12.60) 20 TOP VIEW 1 0.019 (0.49) 0.50 (1.27) BSC 0.014 (0.35) 0.0125 (0.32) 0.0091 (0.23) REV. 0 OUTLINE DIMENSIONS Dimensions are shown in inches and (mm). 0.055 (1.40) 0.045 (1.14) 11 0.299 (7.60) 0.291 ...

Page 12

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