High-Speed Oversampling CMOS
ADC with 16-Bit Resolution
a
at a 2.5 MHz Output Word Rate
AD9260
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Monolithic 16-Bit, Oversampled A/D Converter
8ꢀ Oversampling Mode, 20 MSPS Clock
2.5 MHz Output Word Rate
RESET/
SYNC
DVSS DVDD
1.01 MHz Signal Passband w/0.004 dB Ripple
Signal-to-Noise Ratio: 88.5 dB
Total Harmonic Distortion: –96 dB
Spurious Free Dynamic Range: 100 dB
Input Referred Noise: 0.6 LSB
Selectable Oversampling Ratio: 1ꢀ, 2ꢀ, 4ꢀ, 8ꢀ
Selectable Power Dissipation: 150 mW to 585 mW
85 dB Stopband Attenuation
VINA
VINB
DIGITAL
OTR
MULTIBIT
SIGMA-DELTA
MODULATOR
DEMODULATOR
12-BIT: 20MHz
16-BIT: 10MHz
STAGE 1:2X
DECIMATION
FILTER
AD9260
BIT1–BIT16
0.004 dB Passband Ripple
Linear Phase
STAGE 2:2X
16-BIT: 5MHz DECIMATION
FILTER
REF TOP
Single +5 V Analog Supply, +5 V/+3 V Digital Supply
Synchronize Capability for Parallel ADC Interface
Twos-Complement Output Data
44-Lead MQFP
REF
REFERENCE
BUFFER
BOTTOM
COMMON
MODE
STAGE 3:2X
DECIMATION
FILTER
16-BIT: 2.5MHz
VREF
SENSE
DAV
BANDGAP
REFERENCE
CLOCK
BUFFER
BIAS
CIRCUIT
MODE
REGISTER
READ
REFCOM
BIAS ADJUST
CLK
MODE
CS
The AD9260 operates on a single +5 V supply, typically con-
suming 585 mW of power. A power scaling circuit is provided
allowing the AD9260 to operate at power consumption levels as
low as 150 mW at reduced clock and data rates. The AD9260 is
available in a 44-lead MQFP package and is specified to operate
over the industrial temperature range.
PRODUCT DESCRIPTION
The AD9260 is a 16-bit, high-speed oversampled analog-to-
digital converter (ADC) that offers exceptional dynamic range
over a wide bandwidth. The AD9260 is manufactured on an
advanced CMOS process. High dynamic range is achieved with
an oversampling ratio of 8× through the use of a proprietary
technique that combines the advantages of sigma-delta and
pipeline converter technologies.
PRODUCT HIGHLIGHTS
The AD9260 is fabricated on a very cost effective CMOS
process. High-speed, precision mixed-signal analog circuits are
combined with high-density digital filter circuits.
The AD9260 is a switched-capacitor ADC with a nominal full-
scale input range of 4 V. It offers a differential input with 60 dB
of common-mode rejection of common-mode signals. The sig-
nal range of each differential input is 1 V centered on a 2.0 V
common-mode level.
The AD9260 offers a complete single-chip 16-bit sampling
ADC with a 2.5 MHz output data rate in a 44-lead MQFP.
Selectable Internal Decimation Filtering—The AD9260
provides a high-performance decimation filter with 0.004 dB
passband ripple and 85 dB of stopband attenuation. The filter
is configurable with options for 1×, 2×, 4×, and 8× decimation.
The on-chip decimation filter is configured for maximum per-
formance and flexibility. A series of three half-band FIR filter
stages provide 8× decimation filtering with 85 dB of stopband
attenuation and 0.004 dB of passband ripple. An onboard digi-
tal multiplexer allows the user to access data from the various
stages of the decimation filter.
Power Scaling—The AD9260 consumes a low 585 mW of power
at 16-bit resolution and 2.5 MHz output data rate. Its power
can be scaled down to as low as 150 mW at reduced clock rates.
The on-chip programmable reference and reference buffer am-
plifier are configured for maximum accuracy and flexibility. An
external reference can also be chosen to suit the user’s specific
dc accuracy and drift requirements.
Single Supply— Both of the analog and digital portions of the
AD9260 can operate off of a single +5 V supply simplifying
system power supply design. The digital logic will also accom-
modate a single +3 V supply for reduced power.
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
World Wide Web Site: http://www.analog.com
© Analog Devices, Inc., 2000
5秒后页面跳转
三星深化印度制造布局，供应链本地化进程加速
芯擎科技“星辰一号”自动驾驶芯片点亮成功，2025年量产在即
纳微科技震撼发布GaNSlim革新氮化镓功率芯片
意法半导体发布第四代SiC技术，助力电动汽车电驱
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
