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AD7984 データシート(PDF) 1 Page - Analog Devices

部品番号 AD7984
部品情報  16-Bit, 6 MSPS, PulSAR Differential ADC
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メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
Logo AD - Analog Devices

AD7984 データシート(HTML) 1 Page - Analog Devices

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16-Bit, 6 MSPS, PulSAR
Differential ADC
Data Sheet
AD7625
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2009–2012 Analog Devices, Inc. All rights reserved.
FEATURES
Throughput: 6 MSPS
SNR: 93 dB
INL: ±0.45 LSB typical, ±1 LSB maximum
DNL: ±0.3 LSB typical, ±0.5 LSB maximum
Power dissipation: 135 mW
32-lead LFCSP (5 mm × 5 mm)
SAR architecture
No latency/no pipeline delay
16-bit resolution with no missing codes
Zero error: ±1.5 LSB
Differential input voltage: ±4.096 V
Serial LVDS interface
Self-clocked mode
Echoed-clock mode
Can use LVDS or CMOS for conversion control (CNV signal)
Reference options
Internal: 4.096 V
External (1.2 V) buffered to 4.096 V
External: 4.096 V
APPLICATIONS
High dynamic range telecommunications
Receivers
Digital imaging systems
High speed data acquisition
Spectrum analysis
Test equipment
FUNCTIONAL BLOCK DIAGRAM
AD7625
CLOCK
LOGIC
SERIAL
LVDS
IN–
IN+
REFIN
REF VCM
SAR
÷2
CNV+, CNV–
VIO
D+, D–
DCO+, DCO–
CLK+, CLK–
1.2V
BAND GAP
CAP
DAC
Figure 1.
GENERAL DESCRIPTION
The AD7625 is a 16-bit, 6 MSPS, charge redistribution successive
approximation register (SAR) based architecture analog-to-digital
converter (ADC). SAR architecture allows unmatched perfor-
mance both in noise (93 dB SNR) and in linearity (1 LSB). The
AD7625 contains a high speed, 16-bit sampling ADC, an internal
conversion clock, and an internal buffered reference. On the
CNV± rising edge, it samples the voltage difference between the
IN+ and IN− pins. The voltages on these pins swing in opposite
phase between 0 V and REF. The 4.096 V reference voltage, REF,
can be generated internally or applied externally.
All converted results are available on a single LVDS self-clocked
or echoed-clock serial interface, reducing external hardware
connections.
The AD7625 is housed in a 32-lead, 5 mm × 5 mm LFCSP with
operation specified from −40°C to +85°C.
Table 1. Fast PulSAR® ADC Selection
Input Type
Resolution (Bits)
1 MSPS to <2 MSPS
2 MSPS to 3 MSPS
6 MSPS
Differential (Ground Sense)
16
AD7653
16
AD7667
16
AD7980
16
AD7983
True Bipolar
16
AD7671
Differential (Antiphase)
16
AD7677
AD7621
AD7625
16
AD7623
AD7622
18
AD7643
AD7641
18
AD7982
18
AD7984


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