AD10265_15 Datasheet, PDF (1/24 Pages) Analog Devices – Dual Channel, 12-Bit, 65 MSPS A/D Converter

aDual Channel, 12-Bit, 65 MSPS A/D Converter
with Analog Input Signal Conditioning
AD10265
FEATURES
Dual, 65 MSPS Minimum Sample Rate
Channel-Channel Matching, ؎0.1% Gain Error
Channel-Channel Isolation, >80 dB
AC-Coupled Signal Conditioning Included
Selectable Bipolar Input Voltage Range
(؎0.5 V, ؎1.0 V, ؎2.0 V)
Gain Flatness up to Nyquist: < 0.5 dB
80 dB Spurious-Free Dynamic Range
Two’s Complement Output Format
3.3 V or 5 V CMOS-Compatible Output Levels
1.05 W Per Channel
Industrial and Military Grade
APPLICATIONS
Phased Array Receivers
Communications Receivers
FLIR Processing
Secure Communications
GPS Anti-Jamming Receivers
Multichannel, Multimode Receivers
PRODUCT DESCRIPTION
The AD10265 is a full channel ADC solution with on-module
signal conditioning for improved dynamic performance and
fully matched channel-to-channel performance. The module
includes two wide dynamic range AD6640 ADCs. Each AD6640
has an AD9631/AD9632 ac-coupled amplifier front end. The
AD6640s have on-chip track-and-hold circuitry, and utilize an
innovative multipass architecture, to achieve 12-bit, 65 MSPS
performance. The AD10265 uses innovative high-density
circuit design and laser-trimmed thin-film resistor networks to
achieve exceptional matching and performance while still main-
taining excellent isolation, and providing for significant board
area savings.
The AD10265 operates with ± 5.0 V for the analog signal
conditioning with a separate +3.3 V supply for the analog-to-
digital conversion. Each channel is completely independent
allowing operation with independent Encode and Analog
inputs. The AD10265 also offers the user a choice of Analog
Input Signal ranges to further minimize additional external
signal conditioning, while still remaining general-purpose.
The AD10265 is packaged in a 68-lead ceramic gull wing pack-
age, footprint compatible with the earlier generation AD10242
(12-bit, 40 MSPS). Manufacturing is done on Analog Devices’
MIL-38534 Qualified Manufacturers Line (QML) and com-
ponents are available up to Class-T (–25°C to +125°C). The
AD6640 internal components are manufactured on Analog
Devices’ high-speed complementary bipolar process (XFCB).
PRODUCT HIGHLIGHTS
1. Guaranteed sample rate of 65 MSPS.
2. Input amplitude options, user configurable.
3. Input signal conditioning included; both channels matched
for gain.
4. Fully tested/characterized performance for full channel.
5. Footprint compatible family; 68-lead LCCC.
A_INA3
FUNCTIONAL BLOCK DIAGRAM
A_INA2
A_INA1
A_INB3
A_INB2
A_INB1
(LSB) D0A
D1A
D2A
D3A
D4A
D5A
D6A
D7A
D8A
AD9632
AD9631
AD9632
AD9631
9
TIMING
AIN
AIN
AD6640
12
OUTPUT BUFFERING
AD10265
AIN
AIN
AD6640
12
OUTPUT BUFFERING
7
TIMING
5
ENCODEB
ENCODEB
D11B (MSB)
D10B
D9B
D8B
D7B
ENCODEA ENCODEA D9A D10A D11A
(MSB)
D0B D1B D2B D3B D4B D5B D6B
(LSB)
REV. A
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reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
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© Analog Devices, Inc., 2001