Datasheet AD10242 (Analog Devices)

Dual, 12-Bit, 40 MSPS MCM A/D Converter
a
with Analog Input Signal Conditioning AD10242 FEATURES
The AD10242 operates with ± 5.0 V for the analog signal condi-
2 Matched ADCs with Input Signal Conditioning
tioning with a separate 5.0 V supply for the analog-to-digital
Selectable Bipolar Input Voltage Range
conversion. Each channel is completely independent, allowing
(
ⴞ
0.5 V,
ⴞ
1.0 V,
ⴞ
2.0 V)
operation with independent encode or analog inputs. The AD10242
Full MIL-STD-883B Compliant
also offers the user a choice of analog input signal ranges to mini-
80 dB Spurious-Free Dynamic Range
mize additional signal conditioning required for multiple functions
Trimmed Channel-Channel Matching
within a single system. The heart of the AD10242 is the AD9042, which is designed specifically for applications requiring wide
APPLICATIONS
dynamic range.
Radar Processing Communications Receivers
The AD10242 is manufactured on Analog Devices’
FLIR Processing
MIL-PRF-38534 MCM line and is completely qualified. Units
Secure Communications
are packaged in a custom, cofired, ceramic 68-lead gull wing
Any I/Q Signal Processing Application
package and specified for operation from –55°C to +125°C. Contact the factory for additional custom options including those that allow the user to ac couple the ADC directly, bypassing the front end amplifier section. Also see the AD9042 data sheet for additional details on ADC performance.
GENERAL DESCRIPTION
The AD10242 is a complete dual signal chain solution including
PRODUCT HIGHLIGHTS
on-board amplifiers, references, ADCs, and output buffering 1. Guaranteed sample rate of 40 MSPS. providing unsurpassed total system performance. Each channel is 2. Dynamic performance specified over entire Nyquist band; laser trimmed for gain and offset matching and provides channel- spurious signals @ 80 dBc for –1 dBFS input signals. to-channel crosstalk performance better than 80 dB. The AD10242 utilizes two each of the AD9632, OP279, and AD9042 in a cus- 3. Low power dissipation: <2 W off ± 5.0 V supplies. tom MCM to gain space, performance, and cost advantages over 4. User defined input amplitude. solutions previously available. 5. Packaged in 68-lead ceramic leaded chip carrier.
FUNCTIONAL BLOCK DIAGRAM AIN3 AIN2 AIN1 A A UNEG UCOM IN3 UPOS IN2 AIN1 UPOS OP279 OP279 AD9632 AD9632 UCOM UNEG OP279 AD9042 OP279 AD9042 ENC (LSB) D0A TIMING D1A ENC VREF VREF D2A D11B (MSB) D3A 12 AD10242 12 D4A 9 D10B 5 OUTPUT BUFFERING OUTPUT BUFFERING D9B D5A D8B D6A 7 D7B D7A TIMING D8A ENC ENC D9A D10A D11A D0B D1B D2B D3B D4B D5B D6B (MSB) (LSB)
REV. D 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 that
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Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION PRODUCT HIGHLIGHTS FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS1 EXPLANATION OF TEST LEVELS PIN CONFIGURATION PIN FUNCTION DESCRIPTIONS DEFINITION OF SPECIFICATIONS Analog Bandwidth Aperture Delay Aperture Uncertainty (Jitter) Differential Nonlinearity Encode Pulsewidth/Duty Cycle Harmonic Distortion Integral Nonlinearity Minimum Conversion Rate Maximum Conversion Rate Output Propagation Delay Overvoltage Recovery Time Power Supply Rejection Ratio Signal-to-Noise and Distortion (SINAD) Signal-to-Noise Ratio (SNR, without Harmonics) Spurious-Free Dynamic Range (SFDR) Transient Response Two-Tone Intermodulation Distortion Rejection Two-Tone SFDR EQUIVALENT CIRCUITS Typical Performance Characteristics THEORY OF OPERATION APPLYING THE AD10242 Encoding the AD10242 Performance Improvements USING THE FLEXIBLE INPUT GROUNDING AND DECOUPLING Analog and Digital Grounding LAYOUT INFORMATION EVALUATION BOARD OUTLINE DIMENSIONS Ordering Guide Revision History