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參數資料
| 型號： | AD9245 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | ADC |
| 英文描述： | 14-Bit, 80 MSPS, 3 V A/D Converter |
| 中文描述： | 14位，80MSPS的3V A/D轉換器 |
| 文件頁數： | 1/28頁 |
| 文件大小： | 1510K |
| 代理商： | AD9245 |
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14-Bit, 80 MSPS, 3 V A/D Converter
AD9245
FEATURES
Single 3 V supply operation (2.7 V to 3.6 V)
SNR = 72.7 dBc to Nyquist
SFDR = 87.6 dBc to Nyquist
Low power: 366 mW
Differential input with 500 MHz bandwidth
On-chip reference and sample-and-hold
DNL = ± 0.5 LSB
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
High end medical imaging equipment
IF sampling in communications receivers:
WCDMA, CDMA-One, CDMA-2000, TDS-CDMA
Battery-powered instruments
Hand-held scopemeters
Low cost digital oscilloscopes
Power sensitive military applications
GENERAL DESCRIPTION
The AD9245 is a monolithic, single 3 V supply, 14-bit, 80 MSPS
analog-to-digital converter featuring a high performance
sample-and-hold amplifier (SHA) and voltage reference. The
AD9245 uses a multistage differential pipelined architecture
with output error correction logic to provide 14-bit accuracy at
80 MSPS and guarantee no missing codes over the full operat-
ing temperature range.
The wide bandwidth, truly differential SHA allows a variety of
user-selectable input ranges and common modes, 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 AD9245 is
suitable for applications in communications, imaging, and
medical ultrasound.
A single-ended clock input is used to control all internal con-
version cycles. A duty cycle stabilizer (DCS) compensates for
wide variations in the clock duty cycle while maintaining
FUNCTIONAL BLOCK DIAGRAM
03583-B-001
DRVDD
AVDD
AGND
0.5V
CLK
PDWN
MODE DGND
OTR
VIN+
VIN–
REFT
REFB
AD9245
VREF
SENSE
SHA
A/D
MDAC1
4
16
14
3
A/D
8-STAGE
1 1/2-BIT PIPELINE
REF
SELECT
CLOCK
DUTY CYCLE
STABILIZER
MODE
SELECT
CORRECTION LOGIC
OUTPUT BUFFERS
D13 (MSB)
D0 (LSB)
Figure 1. Functional Block Diagram
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
AD9245 is available in a 32-lead LFCSP and is specified over
the industrial temperature range (–40°C to +85°C).
PRODUCT HIGHLIGHTS
1.
The AD9245 operates from a single 3 V power supply and
features a separate digital output driver supply to accommo-
date 2.5 V and 3.3 V logic families.
2.
Operating at 80 MSPS, the AD9245 consumes a low 366 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.
4.
The AD9245 is pin compatible with the AD9215, AD9235,
and AD9236. This allows a simplified migration from 10 bits
to 14 bits and 20 MSPS to 80 MSPS.
5.
The clock DCS maintains overall ADC performance over a
wide range of clock pulsewidths.
6.
The OTR output bit indicates when the signal is beyond the
selected input range.
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
registered trademarks are the property of their respective owners.
Tel: 781.329.4700Fax: 781.326.8703
www.analog.comRev. B
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| AD9245BCP-80 | 14-Bit, 80 MSPS, 3 V A/D Converter |
| AD9245BCPRL7-80 | 14-Bit, 80 MSPS, 3 V A/D Converter |
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| AD9248 | 14-Bit, 20/40/65 MSPS Dual A/ D Converter |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD9245BCP-20EB | 制造商:Analog Devices 功能描述:EVAL BD FOR AD9245 3V A/D CNVRTR,14BIT, 20 MSPS/40 MSPS/65 M - Bulk |
| AD9245BCP-20EBZ | 制造商:Analog Devices 功能描述:Evaluation Board For AD9245 3 V A/D Converter,14-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS 制造商:Analog Devices 功能描述:EVAL BD FOR AD9245 3V A/D CNVRTR,14BIT, 20 MSPS/40 MSPS/65 M - Bulk |
| AD9245BCP-40EB | 制造商:Analog Devices 功能描述:EVAL BD FOR AD9245 3V A/D CNVRTR,14BIT, 20 MSPS/40 MSPS/65 M - Bulk |
| AD9245BCP-40EBZ | 制造商:Analog Devices 功能描述:EVAL BD FOR AD9245 3V A/D CNVRTR,14BIT, 20 MSPS/40 MSPS/65 M - Bulk |
| AD9245BCP-65EB | 制造商:Analog Devices 功能描述:EVAL BD FOR AD9245 3V A/D CNVRTR,14BIT, 20 MSPS/40 MSPS/65 M - Bulk |
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