AD7725 Selling Leads, Price trend, AD7725 DataSheet download, circuit diagram from SeekIC.com

Features: Programmable Filtering:Any Characteristic up to 108 Tap FIR and/or IIRthPolynomial Signal Conditioning up to 8 OrderProgrammable Decimation and Output Word RateFlexible Programming Modes:Boot from DSP or External EPROMParallel/Serial InterfaceInternal Default Filter for Evaluation14.4 MH...

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SeekIC No. : 004270758 Detail

AD7725: Features: Programmable Filtering:Any Characteristic up to 108 Tap FIR and/or IIRthPolynomial Signal Conditioning up to 8 OrderProgrammable Decimation and Output Word RateFlexible Programming Modes:B...

AD7725 Data Sheet

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Part Number:: AD7725
Supply Ability:: 5000

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1~5000

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Negotiable

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Product Details

Description

Features:

Programmable Filtering:
Any Characteristic up to 108 Tap FIR and/or IIRth
Polynomial Signal Conditioning up to 8 Order
Programmable Decimation and Output Word Rate
Flexible Programming Modes:
Boot from DSP or External EPROM
Parallel/Serial Interface
Internal Default Filter for Evaluation
14.4 MHz Max Master Clock Frequency
0 V to +4 V (Single-Ended) or 2 V (Differential) Input
Range
Power Supplies: AVDD, DVDD: 5 V 5%
On-Chip 2.5 V Voltage Reference
44-Lead MQFP Package
TYPICAL APPLICATIONS
Radar
Sonar
Auxiliary Car Functions
Medical Communications

Pinout

AD7725 Diagram

Specifications

Resolution (Bits)	16bit
T-Put Rate	900kSPS
# Chan	1
Supply V	Single(+5)
Pwr Diss	615mW

Interface	Par,Ser
Ain Range	4 V p-p,Uni 4.0V
SNR (dB)	83dB
Pkg Type	QFP

(TA = 25°C, unless otherwise noted.)
DV_DD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.3 V to +7 V
AV_DD to AGND . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . .0.3 V to +7 V
AV_DD, AVDD1 to DV_DD . . . . . . . . . . . . . . . . . . . . . . .. . . 1 V to +1 V
AGND, AGND1 to DGND . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +0.3 V
Digital Inputs to DGND . . . . . . . . . .. . .. . .. 0.3 V to DV_DD + 0.3 V
Digital Outputs to DGND . . . . . . . . .. . .. . .. 0.3 V to DV_DD + 0.3 V
VIN(+), VIN() to AGND . . . . . . . . . .. . .. . . .0.3 V to AV_DD + 0.3 V
REF1 to AGND . . . . . . . . . . . . . . . .. . .. . .. . .0.3 V to AV_DD + 0.3 V
REF2 to AGND . . . . . . . . . . . . . . . .. . .. . .. . .0.3 V to AV_DD + 0.3 V
REFIN to AGND . . . . . . . . . . . . . . . . . . . . . . . .0.3 V to AV_DD + 0.3 V
DGND, AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.3 V
Input Current to Any Pin except Supplies² . . . . . . . . . . . . .. . ±10 mA
IDD (A_IDD + D_IDD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 150 mA
Operating Temperature Range . . . . . . . . . . .. . .. .40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . . . .. .65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . 150°C
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . .. . .. . .. . . . 58°C
WJC Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20°C
Lead Temperature, Soldering
Vapor Phase (60sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. . .. . . 220°C
ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 kV

Description

The AD7725 is a complete 16-bit, - analog-to-digital con-verter with on-chip, user-programmable signal conditioning. The output of the modulator is processed by three cascaded finite impulse response (FIR) filters, followed by a fully user-program-mable postprocessor. The postprocessor provides processing power of up to 130 million accumulates (MAC) per second. The user has complete control over the filter response, the filter coeffi- cients, and the decimation ratio.

The postprocessor permits the signal conditioning characteris- tics to be programmed through a parallel or serial interface. It is programmed by loading a user-defined filter in the form of a configuration file. This filter can be loaded from a DSP or an external serial EPROM. It is generated using a digital filter design package called Filter Wizard, which is available from the AD7725 section on the Analog Devices website. Filter Wizard allows the user to design different filter types and generates the appropriate configuration file to be down- loaded to the postprocessor. The AD7725 also has an internal default filter for evaluation purposes.

AD7725 provides 16-bit performance for input bandwidths up to 350 kHz with an output word rate of 900 kHz maximum. The input sample rate is set either by the crystal oscillator or an external clock. This part has an accurate on-chip 2.5 V reference for the modu- lator. A reference input/output function allows either the internal reference or an external system reference to be used as the reference source for the modulator. The device is available in a 44-lead MQFP package and is speci- fied over a 40 °C to +85° C temperature range.

AD7725

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