Purchase AD7707, In-stock AD7707 From SeekIC.
MFG:ADI D/C:09
Part Number: AD7707
MFG: ADI
D/C: 09
Description: The AD7707 is a complete analog front end for low frequency measurement applications. This three-chann...
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AD7707
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DataSheet
General Description
AD7707 General Description
The AD7707 is a complete analog front end for low frequency measurement applications. This three-channel device can accept either low level input signals directly from a transducer or high level ( 10 V) signals and produce a serial digital output. It employs a sigma-delta conversion technique to realize up to 16bits of no missing codes performance.
The selected input signal is applied to a proprietary programmable gain front end based around an analog modulator. The modulator output is processed by an on-chip digital filter. The first notch of this digital filter can be programmed via an on-chip control register allowing adjustment of the filter cutoff and output update rate. The AD7707 operates from a single 2.7 V to 3.3 V or 4.75 V to 5.25 V supply.
The AD7707 features two low level pseudo-differential analog input channels, one high level input channel and a differential reference input. Input signal ranges of 0mV to+20 mV through 0 V to +2.5V can be accommodated on both low level input channels when operating with a VDD of 5 V and a reference of 2.5 V. They can also handle bipolar input signal ranges of 20 mV through 2.5V, which are referenced to the LCOM input.
The AD7707, with a 3V supply and a 1.225V reference, can handle unipolar input signal ranges of 0mV to +10 mV through 0V to +1.225V. Its bipolar input signal ranges are 10mV through 1.225 V. The high level input channel can accept input signal ranges of
10V, 5V, 0 V to +10 V and 0 V to +5V. The AD7707 thus performs all signal conditioning and conversion for a three- channel system.
AD7707 Maximum Ratings
AVDD to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +7 V
AVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.3 V to +7 V
DVDD to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 0.3 V to +7 V
DVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 0.3 V to +7V
AVDD to DVDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . 0.3V to +7 V
DGND to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +0.3V
AIN1, AIN2 Input Voltage to
LOCOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to AVDD + 0.3 V
AIN3 Input Voltage to HICOM . . . . . . . . . . . . . . . . . . .. 11 V to +30 V
VBIAS to AGND . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to AVDD + 0.3 V
HICOM, LOCOM to AGND . . . . . . . . . . . . . . . . . . 0.3 V to AVDD + 0.3 V
REF(+), REF() to AGND . . . . . . . . . . . . . . . . . .. 0.3 V to AVDD + 0.3 V
Digital Input Voltage to DGND . . . . . . . . . . . . . . 0.3 V to DVDD + 0.3 V
Digital Output Voltage to DGND . . . . . . . . . . . . . 0.3 V to DVDD + 0.3 V
Operating Temperature Range
Industrial (B Version) . . . . . . . . . . . . . . . . . . . . . . ... .. . 40 C to +85 C
Storage Temperature Range . . . . . . . . . . . . . . . . . . .. 65 C to +150 C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150 C
SOIC Package, Power Dissipation . . . . . . . . . . . . . . . .. . . . . . . 450 mW
JAThermal Impedance . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 75 C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +215 C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . +220 C
TSSOP Package, Power Dissipation . . . . . . . . . . . . . . . .. . . . . . 450 mW
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 139 C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . +215 C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . .. . +220 C
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 kV
AVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.3 V to +7 V
DVDD to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 0.3 V to +7 V
DVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 0.3 V to +7V
AVDD to DVDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . 0.3V to +7 V
DGND to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +0.3V
AIN1, AIN2 Input Voltage to
LOCOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to AVDD + 0.3 V
AIN3 Input Voltage to HICOM . . . . . . . . . . . . . . . . . . .. 11 V to +30 V
VBIAS to AGND . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to AVDD + 0.3 V
HICOM, LOCOM to AGND . . . . . . . . . . . . . . . . . . 0.3 V to AVDD + 0.3 V
REF(+), REF() to AGND . . . . . . . . . . . . . . . . . .. 0.3 V to AVDD + 0.3 V
Digital Input Voltage to DGND . . . . . . . . . . . . . . 0.3 V to DVDD + 0.3 V
Digital Output Voltage to DGND . . . . . . . . . . . . . 0.3 V to DVDD + 0.3 V
Operating Temperature Range
Industrial (B Version) . . . . . . . . . . . . . . . . . . . . . . ... .. . 40 C to +85 C
Storage Temperature Range . . . . . . . . . . . . . . . . . . .. 65 C to +150 C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150 C
SOIC Package, Power Dissipation . . . . . . . . . . . . . . . .. . . . . . . 450 mW
JAThermal Impedance . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 75 C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +215 C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . +220 C
TSSOP Package, Power Dissipation . . . . . . . . . . . . . . . .. . . . . . 450 mW
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 139 C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . +215 C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . .. . +220 C
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 kV
AD7707 Features
Charge Balancing ADC
16 Bits No Missing Codes
0.003% Nonlinearity
High Level (610 V) and Low Level (610 mV) Input
Channels
True Bipolar 6100 mV Capability on Low Level Input
Channels Without Requiring Charge Pumps
Programmable Gain Front End
Gains from 1 to 128
Three-Wire Serial Interface
SPI(TM), QSPI(TM), MICROWIRE(TM) and DSP Compatible
Schmitt Trigger Input on SCLK
Ability to Buffer the Analog Input
2.7 V to 3.3 V or 4.75 V to 5.25 V Operation
Power Dissipation 1 mW max @ 3? V
Standby Current 8 mA max
20-Lead SOIC and TSSOP Packages
16 Bits No Missing Codes
0.003% Nonlinearity
High Level (610 V) and Low Level (610 mV) Input
Channels
True Bipolar 6100 mV Capability on Low Level Input
Channels Without Requiring Charge Pumps
Programmable Gain Front End
Gains from 1 to 128
Three-Wire Serial Interface
SPI(TM), QSPI(TM), MICROWIRE(TM) and DSP Compatible
Schmitt Trigger Input on SCLK
Ability to Buffer the Analog Input
2.7 V to 3.3 V or 4.75 V to 5.25 V Operation
Power Dissipation 1 mW max @ 3? V
Standby Current 8 mA max
20-Lead SOIC and TSSOP Packages
AD7707 Connection Diagram
AD7707
PDF/DataSheet Download
- Datasheet: AD7707
- File Size: 324103 KB
- Manufacturer: AD [Analog Devices]
- Click here to Download
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