AD9235-20PCB Analog Devices Inc, AD9235-20PCB Datasheet

AD9235-20PCB

Manufacturer Part Number

AD9235-20PCB

Description

BOARD EVAL FOR AD9235-20

Manufacturer

Analog Devices Inc

Datasheets

1.AD9235BRUZ-20.pdf (40 pages)

2.AD9235-20PCB.pdf (5 pages)

Specifications of AD9235-20PCB

Rohs Status

RoHS non-compliant

Number Of Adc's

Number Of Bits

Sampling Rate (per Second)

20M

Data Interface

Parallel

Inputs Per Adc

1 Differential

Input Range

2 Vpp

Power (typ) @ Conditions

95mW @ 20MSPS

Voltage Supply Source

Single Supply

Operating Temperature

-40°C ~ 85°C

Utilized Ic / Part

AD9235-20

Lead Free Status / Rohs Status

Not Compliant

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REV. B

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. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective companies.

PRODUCT DESCRIPTION

The AD9235 is a family of monolithic, single 3 V supply, 12-bit,

20/40/65 MSPS analog-to-digital converters. This family

features a high performance sample-and-hold amplifier (SHA)

and voltage reference. The AD9235 uses a multistage differential

pipelined architecture with output error correction logic to provide

12-bit accuracy at 20/40/65 MSPS data rates and guarantee

no missing codes over the full operating temperature range.

The wide bandwidth, truly differential SHA allows 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 power and cost savings over previously available

analog-to-digital converters, the AD9235 is suitable for applica-

tions in communications, imaging, and medical ultrasound.

A single-ended clock input is used to control all internal conversion

cycles. A duty cycle stabilizer (DCS) compensates for wide

variations in the clock duty cycle while maintaining excellent

overall ADC performance. The digital output data is presented

in straight binary or twos complement formats. An out-of-range

(OTR) signal indicates an overflow condition that can be used

with the most significant bit to determine low or high overflow.

Fabricated on an advanced CMOS process, the AD9235 is available

in a 28-lead thin shrink small outline package (TSSOP) and a

32-lead chip scale package (LFCSP) and is specified over the

industrial temperature range (–40°C to +85°C).

FEATURES

Single 3 V Supply Operation (2.7 V to 3.6 V)

SNR = 70 dBc to Nyquist at 65 MSPS

SFDR = 85 dBc to Nyquist at 65 MSPS

Low Power: 300 mW at 65 MSPS

Differential Input with 500 MHz Bandwidth

On-Chip Reference and SHA

DNL =

Flexible Analog Input: 1 V p-p to 2 V p-p Range

Offset Binary or Twos Complement Data Format

Clock Duty Cycle Stabilizer

APPLICATIONS

Ultrasound Equipment

IF Sampling in Communications Receivers:

Battery-Powered Instruments

Hand-Held Scopemeters

Low Cost Digital Oscilloscopes

IS-95, CDMA-One, IMT-2000

0.4 LSB

PRODUCT HIGHLIGHTS

1. The AD9235 operates from a single 3 V power supply and

2. Operating at 65 MSPS, the AD9235 consumes a low 300 mW.

3. The patented SHA input maintains excellent performance

4. The AD9235 pinout is similar to the AD9214-65, a 10-bit,

5. The clock DCS maintains overall ADC performance over a

6. The OTR output bit indicates when the signal is beyond the

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

SENSE

REFB

REFT

VREF

features a separate digital output driver supply to accommodate

2.5 V and 3.3 V logic families.

for input frequencies up to 100 MHz and can be configured

for single-ended or differential operation.

65 MSPS ADC. This allows a simplified upgrade path from

10 bits to 12 bits for 65 MSPS systems.

wide range of clock pulsewidths.

selected input range.

VIN+

VIN–

SHA

SELECT

REF

FUNCTIONAL BLOCK DIAGRAM

AVDD

12-Bit, 20/40/65 MSPS

AGND

A/D

MDAC1

0.5V

AD9235

DUTY CYCLE

STABLIZER

3 V A/D Converter

CLOCK

CLK

CORRECTION LOGIC

OUTPUT BUFFERS

1 1/2-BIT PIPELINE

8-STAGE

PDWN

DRVDD

AD9235

SELECT

MODE

www.analog.com

A/D

DGND

OTR

D11

Related parts for AD9235-20PCB

AD9235-20PCB Summary of contents

Page 1

... The AD9235 operates from a single 3 V power supply and features a separate digital output driver supply to accommodate 2.5 V and 3.3 V logic families. 2. Operating at 65 MSPS, the AD9235 consumes a low 300 mW. 3. The patented SHA input maintains excellent performance for input frequencies up to 100 MHz and can be configured for single-ended or differential operation ...

Page 2

... ± 0.01 ± 0. 165 VI 95 110 180 V 1.0 1.0 –2– AD9235BRU/BCP-65 Max Min Typ Max Unit 12 Bits 12 Bits ± 0.50 ± 1.20 % FSR ± 0.50 ± 2.60 % FSR ± 0.40 ± 0.80 LSB ± 0.35 LSB ± 0.70 ± 1.30 LSB ± ...

Page 3

... TIME Full NOTES 1 For the AD9235-65 model only, with duty cycle stabilizer enabled. DCS function not applicable for -20 and -40 models. 2 Output delay is measured from CLK 50% transition to DATA 50% transition, with 5 pF load on each output. 3 Wake-up time is dependent on value of decoupling capacitors; typical values shown with 0.1 µF and 10 µF capacitors on REFT and REFB. ...

Page 4

... –84.0 –82.5 IV –90.0 –80.0 IV –90 92.0 IV 80.0 88.5 I 91 84.0 –4– AD9235BRU/BCP-65 Typ Max Min Typ Max Unit 70.6 70.5 dBc dBc dBc 70.3 dBc 70.4 dBc 68.7 69.7 dBc 70.1 dBc 68.5 68.3 dBc 70.5 70.4 dBc ...

Page 5

... AD9235BCP-20* –40°C to +85°C AD9235BCP-40* –40°C to +85°C AD9235BCP-65* –40°C to +85°C AD9235-20PCB AD9235-40PCB AD9235-65PCB AD9235BCP-20EB AD9235BCP-40EB AD9235BCP-65EB *It is recommended that the exposed paddle be soldered to the ground plane. There is an increased reliability of the solder joints and maximum thermal capability of the package is achieved with exposed paddle soldered to the customer board ...

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