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MFG:ADI D/C:09
Part Number: AD7720
MFG: ADI
D/C: 09
Description: This device is a 7th order sigma-delta modulator that converts the analog input signal into a high spe...
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AD7720
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DataSheet
General Description
AD7720 General Description
This device is a 7th order sigma-delta modulator that converts the analog input signal into a high speed 1-bit data stream. The part operates from a +5 V supply and accepts a differential input range of 0 V to +2.5 V or ±1.25 V centered about a common-mode bias. The analog input is continuously sampled by the analog modulator, eliminating the need for external sample and hold circuitry. The input information is contained in the output stream as a density of ones. The original information can be reconstructed with an appropriate digital filter.
The part provides an accurate on-chip 2.5 V reference. A refer-ence input/output function is provided to allow either the inter-nal reference or an external system reference to be used as the reference source for the part.
The device is offered in a 28-lead TSSOP package and designed to operate from 40°C to +85°C.
AD7720 Maximum Ratings
DVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +7 V
AVDD to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +7 V
AVDD to DVDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +0.3 V
AGND to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +0.3 V
Digital Input Voltage to DGND . . . . . . . . . . . . . . 0.3 V to DVDD + 0.3 V
Analog Input Voltage to AGND . . . . . . . . . . . . . . 0.3 V to AVDD + 0.3 V
Input Current to Any Pin Except Supplies2 . . . . . . . . . . . . . . . . . ±10 mA
Operating Temperature Range
Industrial (B Version) . . . . . . . . . . . . . . . . . . . . . . . . . .40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . 65°C to +150°C
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
TSSOP Package
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. +220°C
AVDD to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +7 V
AVDD to DVDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +0.3 V
AGND to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +0.3 V
Digital Input Voltage to DGND . . . . . . . . . . . . . . 0.3 V to DVDD + 0.3 V
Analog Input Voltage to AGND . . . . . . . . . . . . . . 0.3 V to AVDD + 0.3 V
Input Current to Any Pin Except Supplies2 . . . . . . . . . . . . . . . . . ±10 mA
Operating Temperature Range
Industrial (B Version) . . . . . . . . . . . . . . . . . . . . . . . . . .40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . 65°C to +150°C
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
TSSOP Package
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. +220°C
AD7720 Features
12.5 MHz Master Clock Frequency
0 V to +2.5 V or 1.25 V Input Range
Single Bit Output Stream
90 dB Dynamic Range
Power Supplies: AVDD, DVDD: +5 V 5%
On-Chip 2.5 V Voltage Reference
28-Lead TSSOP
0 V to +2.5 V or 1.25 V Input Range
Single Bit Output Stream
90 dB Dynamic Range
Power Supplies: AVDD, DVDD: +5 V 5%
On-Chip 2.5 V Voltage Reference
28-Lead TSSOP
AD7720 Connection Diagram
AD7720
PDF/DataSheet Download
- Datasheet: AD7720
- File Size: 238012 KB
- Manufacturer: AD [Analog Devices]
- Click here to Download
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