AD10265 Datasheet, PDF (1/18 Pages) Analog Devices – Dual Channel, 12-Bit, 65 MSPS A/D Converter with Analog Input Signal Conditioning

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
Twos 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 maintaining 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 in-
puts. 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
Package, footprint compatible with the earlier generation
AD10242 (12-bit, 40 MSPS). Manufacturing is done on
Analog Devices’ MIL-38534 Qualified Manufacturers Line
(QML) and components are available up to Class-H (–55°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. 0
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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
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© Analog Devices, Inc., 1998