Octal, 12-Bit, 40/50/65 MSPS
Serial LVDS 1.8 V A/D Converter
AD9222
FEATURES
8 ADCs integrated into 1 package
114 mW ADC power per channel at 65 MSPS
SNR = 70 dB (to Nyquist)
ENOB = 11.3 bits
SFDR = 80 dBc
FUNCTIONAL BLOCK DIAGRAM
AVDD
PDWN
DRVDD
DRGND
AD9222
12
VIN + A
VIN – A
D + A
D – A
SERIAL
LVDS
ADC
ADC
12
12
Excellent linearity: DNL = 0.3 LSB (typical),
INL = 0.4 LSB (typical)
VIN + B
VIN – B
D + B
D – B
SERIAL
LVDS
Serial LVDS (ANSI-644, default)
Low power, reduced signal option (similar IEEE 1596.3)
Data and frame clock outputs
325 MHz full-power analog bandwidth
2 V p-p input voltage range
1.8 V supply operation
Serial port control
Full-chip and individual-channel power-down modes
Flexible bit orientation
Built-in and custom digital test pattern generation
Programmable clock and data alignment
Programmable output resolution
Standby mode
VIN + C
VIN – C
D + C
D – C
SERIAL
LVDS
ADC
12
12
VIN + D
VIN – D
D + D
D – D
SERIAL
LVDS
ADC
ADC
ADC
VIN + E
VIN – E
SERIAL
LVDS
D + E
D – E
12
12
VIN + F
VIN – F
D + F
D – F
SERIAL
LVDS
VIN + G
VIN – G
D + G
D – G
SERIAL
LVDS
ADC
ADC
12
VIN + H
VIN – H
D + H
D – H
SERIAL
LVDS
APPLICATIONS
Medical imaging and nondestructive ultrasound
Portable ultrasound and digital beam-forming systems
Quadrature radio receivers
Diversity radio receivers
Tape drives
Optical networking
VREF
FCO +
FCO –
SENSE
0.5V
DATA RATE
MULTIPLIER
REFT
REFB
REF
SELECT
SERIAL PORT
INTERFACE
DCO +
DCO –
Test equipment
SCLK/
DTP
RBIAS AGND CSB SDIO/
ODM
CLK+
CLK–
GENERAL DESCRIPTION
Figure 1.
The AD9222 is an octal, 12-bit, 40/50/65 MSPS analog-to-
digital converter (ADC) with an on-chip sample-and-hold
circuit designed for low cost, low power, small size, and ease of
use. The product operates at a conversion rate of up to 65 MSPS
and is optimized for outstanding dynamic performance and low
power in applications where a small package size is critical.
clock and data alignment and programmable digital test pattern
generation. The available digital test patterns include built-in
deterministic and pseudorandom patterns, along with custom user-
defined test patterns entered via the serial port interface (SPI).
The AD9222 is available in an RoHS compliant, 64-lead LFCSP. It is
specified over the industrial temperature range of −40°C to +85°C.
The ADC requires a single 1.8 V power supply and LVPECL-/
CMOS-/LVDS-compatible sample rate clock for full performance
operation. No external reference or driver components are
required for many applications.
PRODUCT HIGHLIGHTS
1. Small Footprint. Eight ADCs are contained in a small,
space-saving package.
2. Low power of 114 mW/channel at 65 MSPS.
3. Ease of Use. A data clock output (DCO) is provided that
operates at frequencies of up to 390 MHz and supports
double data rate (DDR) operation.
4. User Flexibility. The SPI control offers a wide range of
flexible features to meet specific system requirements.
5. Pin-Compatible Family. This includes the AD9212 (10-bit)
and AD9252 (14-bit).
The ADC automatically multiplies the sample rate clock for
the appropriate LVDS serial data rate. A data clock output (DCO)
for capturing data on the output and a frame clock output (FCO)
for signaling a new output byte are provided. Individual-channel
power-down is supported and typically consumes less than
2 mW when all channels are disabled.
The ADC contains several features designed to maximize
flexibility and minimize system cost, such as programmable
Rev. C
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 may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks arethe property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2006–2010 Analog Devices, Inc. All rights reserved.
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