10-Bit, 65/80/105 MSPS,
3 V A/D Converter
Data Sheet
AD9215
FEATURES
FUNCTIONAL BLOCK DIAGRAM
AVDD
DRVDD
Single 3 V supply operation (2.7 V to 3.3 V)
SNR = 58 dBc (to Nyquist)
SFDR = 77 dBc (to Nyquist)
VIN+
VIN–
PIPELINE
ADC CORE
SHA
Low power ADC core: 96 mW at 65 MSPS, 104 mW
@ 80 MSPS, 120 mW at 105 MSPS
Differential input with 300 MHz bandwidth
On-chip reference and sample-and-hold amplifier
DNL = 0.25 LSB
REFT
REFB
AD9215
CORRECTION LOGIC
10
OR
OUTPUT BUFFERS
Flexible analog input: 1 V p-p to 2 V p-p range
Offset binary or twos complement data format
Clock duty cycle stabilizer
D9 (MSB)
D0
VREF
CLOCK
MODE
SELECT
DUTY CYCLE
STABLIZER
APPLICATIONS
SENSE
REF
SELECT
Ultrasound equipment
0.5V
IF sampling in communications receivers
Battery-powered instruments
Hand-held scopemeters
AGND
CLK
PDWN
MODE DGND
Figure 1.
Low cost digital oscilloscopes
PRODUCT DESCRIPTION
The AD9215 is a family of monolithic, single 3 V supply, 10-bit,
65/80/105 MSPS analog-to-digital converters (ADC). This family
features a high performance sample-and-hold amplifier (SHA)
and voltage reference. The AD9215 uses a multistage differential
pipelined architecture with output error correction logic to pro-
vide 10-bit accuracy at 105 MSPS data rates and to guarantee no
missing codes over the full operating temperature range.
Fabricated on an advanced CMOS process, the AD9215 is avail-
able in both a 28-lead surface-mount plastic package and a
32-lead chip scale package and is specified over the industrial
temperature range of −40°C to +85°C.
PRODUCT HIGHLIGHTS
1. The AD9215 operates from a single 3 V power supply and
features a separate digital output driver supply to accom-
modate 2.5 V and 3.3 V logic families.
2. Operating at 105 MSPS, the AD9215 core ADC consumes
a low 120 mW; at 80 MSPS, the power dissipation is 104
mW; and at 65 MSPS, the power dissipation is 96 mW.
3. The patented SHA input maintains excellent performance
for input frequencies up to 200 MHz and can be config-
ured for single-ended or differential operation.
4. The AD9215 is part of several pin compatible 10-, 12-, and
14-bit low power ADCs. This allows a simplified upgrade
from 10 bits to 12 bits for systems up to 80 MSPS.
The wide bandwidth, truly differential sample-and-hold ampli-
fier (SHA) allows for a variety of user-selectable input ranges
and offsets including single-ended applications. It is suitable for
multiplexed systems that switch full-scale voltage levels in
successive channels and for sampling single-channel inputs at
frequencies well beyond the Nyquist rate. Combined with pow-
er and cost savings over previously available ADCs, the AD9215
is suitable for applications in communications, imaging, and
medical ultrasound.
A single-ended clock input is used to control all internal conversion
cycles. A duty cycle stabilizer compensates for wide variations in the
clock duty cycle while maintaining excellent performance. The digital
output data is presented in straight binary or twos complement for-
mats. An out-of-range signal indicates an overflow condition, which
can be used with the MSB to determine low or high overflow.
5. The clock duty cycle stabilizer maintains converter per-
formance over a wide range of clock pulse widths.
6. The out of range (OR) output bit indicates when the signal
is beyond the selected input range.
Rev. B
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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 ©2003–2013 Analog Devices, Inc. All rights reserved.
Technical Support
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