• AD7730BRUZ
  • AD7730BRUZ
  • AD7730BRUZ
  • AD7730BRUZ
  • AD7730BRUZ
  • AD7730BRUZ
  • AD7730BRUZ
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The AD7730 is a complete analog front end for weigh-scale and pressure measurement applications. The device accepts low-level signals directly from a transducer and outputs a serial digital word. The input signal is applied to a proprietary programmable gain front end based around an analog modulator. The modulator output is processed by a low pass programmable digital filter, allowing adjustment of filter cutoff, output rate and settling time. The part features two buffered differential programmable gain analog inputs as well as a differential reference input. The part operates from a single +5 V supply. It accepts four unipolar analog input ranges: 0 mV to ±10 mV, +20 mV, +40 mV and +80 mV and four bipolar ranges: ±10 mV, ±20 mV, ±40 mV and ±80 mV. The peak-to-peak resolution achievable directly from the part is 1 in 230,000 counts. An on-chip 6-bit DAC allows the removal of TARE voltages. Clock signals for synchronizing ac excitation of the bridge are also provided. The serial interface on the part can be configured for three-wire operation and is compatible with microcontrollers and digital signal processors. The AD7730 contains self-calibration and system calibration options, and features an offset drift of less than 5 nV/°C and a gain drift of less than 2 ppm/°C. The part is available in a 24-pin plastic DIP, a 24-lead SOIC and 24-lead TSSOP package.

Resolution (Bits)24bit
Sampling Rate1.2kSPS
Supply Voltage TypeSingle
Supply Voltage Min4.75V
Supply Voltage Max5.25V
ADC / DAC Case StyleTSSOP
No. of Pins24Pins
Input Channel TypeDifferential
Data InterfaceSPI
Operating Temperature Min-40°C
Operating Temperature Max85°C
PackagingEach
Product RangeDual 24-Bit Sigma-Delta ADCs
Automotive Qualification Standard-
RoHS Phthalates CompliantYes
MSLMSL 1 - Unlimited
SVHCNo SVHC (07-Jul-2017)
supply_voltage_dc4.75 V (min)
mil_specNo
power_dissipation65.0 mW
reach_svhc_complianceNo SVHC
lead_free_statusContains Lead
mounting_styleSurface Mount
packagingTube, Bulk
case_packageTSSOP
sample_rate1.20 kHz
supply_current22.3 mA
lifecycle_statusActive
input_impedance9.00 GΩ
rohs_statusCompliant
pin_count24
number_of_bits24
resolution_bits24.0
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