a
Ultrahigh Speed
Monolithic Track-and-Hold
AD9100*
FEATURES
Excellent Hold Mode Distortion into 250 ⍀
–88 dB @ 30 MSPS (2.3 MHz V IN)
–83 dB @ 30 MSPS (12.1 MHz VIN)
–74 dB @ 30 MSPS (19.7 MHz VIN)
16 ns Acquisition Time to 0.01%
<1 ps Aperture Jitter
250 MHz Tracking Bandwidth
83 dB Feedthrough Rejection @ 20 MHz
3.3 nV/√Hz Spectral Noise Density
MlL-STD-Compliant Versions Available
OBS
APPLICATIONS
A/D Conversion
Direct IF Sampling
Imaging/FLIR Systems
Peak Detectors
Radar/EW/ECM
Spectrum Analysis
CCD ATE
GENERAL DESCRIPTION
FUNCTIONAL BLOCK DIAGRAM
CLK
50 Ω
A1
CLK
SWITCH
V IN
CHOLD
22pF
2.3V
CLAMP
A2
VOUT
AD9100
OLE
The AD9100 is a monolithic track-and-hold amplifier which
sets a new standard for high speed and high dynamic range
applications. It is fabricated in a mature high speed complementary bipolar process. In addition to innovative design topologies,
a custom package is utilized to minimize parasitics and optimize
dynamic performance.
Acquisition time (hold to track) is 13 ns to 0.1% accuracy, and
16 ns to 0.01%. The AD9100 boasts superlative hold-mode
frequency domain performance; when sampling at 30 MSPS
hold mode distortion is less than 83 dBfs for analog frequencies
up to 12 MHz; and –74 dBfs at 20 MHz. The AD9100 can also
drive capacitive loads up to 100 pF with little degradation in
acquisition time; it is therefore well suited to drive 8- and 10-bit
flash converters at clock speeds to 50 MSPS. With a spectral
noise density of 3.3 nV/√Hz and feedthrough rejection of 83 dB
at 20 MHz, the AD9100 is well suited to enhance the dynamic
range of many 8- to 16-bit systems.
TE
The AD9100 is “user friendly” and easy to apply: (1) it requires
+5 V/–5.2 V power supplies; (2) the hold capacitor and switch
power supply decoupling capacitors are built into the DIP
package; (3) the encode clock is differential ECL to minimize
clock jitter; (4) the input resistance is typically 800 kΩ; (5) the
analog input is internally clamped to prevent damage from
voltage transients.
The AD9100 is available in a 20-lead side-brazed “skinny DIP”
package and a 28-lead LCC package. Commercial, industrial,
and military temperature grade parts are available. Consult the
factory for information about the availability of 883-qualified
devices.
PRODUCT HIGHLIGHTS
1. Hold Mode Distortion is guaranteed.
2. Monolithic construction.
3. Analog input is internally clamped to protect against
overvoltage transients and ensure fast recovery.
4. Output is short circuit protected.
5. Drives capacitive loads to 100 pF.
6. Differential ECL clock inputs.
*Patent pending.
REV. A
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
