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AD7707

Features: Charge Balancing ADC16 Bits No Missing Codes0.003% NonlinearityHigh Level (610 V) and Low Level (610 mV) InputChannelsTrue Bipolar 6100 mV Capability on Low Level InputChannels Without Requiring Charge PumpsProgrammable Gain Front EndGains from 1 to 128Three-Wire Serial InterfaceSPI(TM),...

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SeekIC No. : 004270709 Detail

AD7707: Features: Charge Balancing ADC16 Bits No Missing Codes0.003% NonlinearityHigh Level (610 V) and Low Level (610 mV) InputChannelsTrue Bipolar 6100 mV Capability on Low Level InputChannels Without Req...

AD7707 Data Sheet

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Part Number:
AD7707
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



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




Pinout

AD7707 Diagram

Connection Diagram




Specifications

Resolution (Bits) 16bit
T-Put Rate 500SPS
# Chan 3
Supply V Single(+3),Single(+3.3),Single(+5)
Pwr Diss 3.75mW
Interface Ser,SPI
Ain Range Bip (Vref)/(PGA Gain),Bip 10V,Bip 5.0V,Uni (Vref)/(PGA Gain),Uni 10V,Uni 5.0V
SNR (dB) 116dB
Pkg Type SOIC,SOP


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




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.






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