參數資料
| 型號： | AD9260ASZRL |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 1/44頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 2.5MHZ 44MQFP |
| 標準包裝： | 800 |
| 位數： | 16 |
| 采樣率（每秒）： | 20M |
| 數據接口： | 并聯 |
| 轉換器數目： | 1 |
| 功率耗散（最大）： | 585mW |
| 電壓電源： | 模擬和數字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 44-QFP |
| 供應商設備封裝： | 44-MQFP（10x10） |
| 包裝： | 帶卷 (TR) |
| 輸入數目和類型： | 2 個單端，單極；1 個差分，單極 |
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High Speed Oversampling CMOS ADC with
16-Bit Resolution at a 2.5 MHz Output Word Rate
AD9260
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
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
2004 Analog Devices, Inc. All rights reserved.
FEATURES
Monolithic 16-bit, oversampled A/D converter
8× oversampling mode, 20 MSPS clock
2.5 MHz output word rate
1.01 MHz signal passband with 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: 1×, 2×, 4×, 8×
Selectable power dissipation: 150 mW to 585 mW
85 dB stop-band attenuation
0.004 dB pass-band ripple
Linear phase
Single 5 V analog supply, 5 V/3 V digital supply
Synchronize capability for parallel ADC interface
Twos complement output data
44-lead MQFP
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. 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 rejec-
tion of common-mode signals. The signal range of each differ-
ential input is ±1 V centered on a 2.0 V common-mode level.
The on-chip decimation filter is configured for maximum
performance and flexibility. A series of three half-band FIR
filter stages provide 8× decimation filtering with 85 dB of stop-
band attenuation and 0.004 dB of pass-band ripple. An onboard
digital multiplexer allows the user to access data from the
various stages of the decimation filter. The on-chip
programmable reference and reference buffer amplifier 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.
The AD9260 operates on a single +5 V supply, typically
consuming 585 mW of power. A power scaling circuit is
provided allowing the AD9260 to operate at power consump-
FUNCTIONAL BLOCK DIAGRAM
MULTIBIT
SIGMA-DELTA
MODULATOR
AV
DD
A
VSS
RESET/
SYNC
12-BIT:
20MHz
DIGITAL
DEMODULATOR
STAGE 1:2X
DECIMATION
FILTER
STAGE 2:2X
DECIMATION
FILTER
STAGE 3:2X
DECIMATION
FILTER
OU
TPU
T
M
O
D
E
M
U
LTIPLEXER
OUTP
UT
RE
GIS
T
E
R
DRV
DD
D
R
VSS
DVSS DVDD
16-BIT:
10MHz
16-BIT:
5MHz
16-BIT:
2.5MHz
AV
DD
A
VSS
AV
DD
A
VSS
MODE
REGISTER
REFERENCE
BUFFER
BANDGAP
REFERENCE
BIAS
CIRCUIT
CLOCK
BUFFER
AD9260
OTR
BIT1–
BIT16
DAV
CS
MODE
CLK
BIAS ADJUST
REFCOM
SENSE
VREF
COMMON
MODE
REF
BOTTOM
REF TOP
VINB
VINA
READ
00581-C-001
Figure 1.
tion 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 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
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
pass-band ripple and 85 dB of stop-band attenuation. The filter
is configurable with options for 1×, 2×, 4×, and 8× decimation.
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.
Single Supply
—Both 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
accommodate a single +3 V supply for reduced power.
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