AD7795 6-Channel, Low Noise, Low Power, 16-Bit Sigma Delta ADC with On-Chip In-Amp and Reference
Temperature measurement
Pressure measurement
Weigh scales
Strain gage transducers
Gas analysis
The AD7794/AD7795 are low power, low noise, complete analog front ends for high precision measurement applications. They contain a low noise, 24-/16-bit Σ-Δ ADC with six differential inputs. The on-chip low noi se instrumentation amplifier means that signals of small amplitude can be interfaced directly to the ADC.
Each device contains a precision, low noise, low drift internal band gap reference, and can also accept up to two external differential references. Other on-chip features include programmable excitation current sources, burnout currents, and a bias voltage generator that is used to set the common-mode voltage of a channel to AVDD/2. The low-side power switch can be used to power down bridge sensors between conversions, minimizing the system’s power consumption. The AD7794/AD7795 can operate with either an internal clock or an external clock. The output data rate from each part can vary from 4.17 Hz to 470 Hz.
Both parts operate with a power supply from 2.7 V to 5.25 V. The B-grade parts (AD7794 and AD7795) are specified for a temperature range of −40°C to +105°C while the C-grade part (AD7794) is specified for a temperature range of −40°C to +125°C. They consume a current of 400 μA typical and are housed in a 24-lead TSSOP.
Applications
Features and BenefitsUp to 23 effective bitsRMS noise: 40 nV @ 4.17 Hz, 85 nV @ 16.7 HzCurrent: 400 μA typicalPower-down: 1 μA maximumLow noise, programmable gain, instrumentation ampBand gap reference with 4 ppm/°C drift typicalUpdate rate: 4.17 Hz to 470 HzSix differential analog inputsInternal clock oscillatorSimultaneous 50 Hz/60 Hz rejectionReference detectProgrammable current sources | Design ToolsReference Designs |
Data Sheets
Application Notes
Product Highlight
Frequently Asked Questions
Order Information
Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
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AD7795BRUZ Production | 24 ld TSSOP | OTH 62 | -40 to 105C | 5.26 | 4.45 | Y |
AD7795BRUZ-REEL Production | 24 ld TSSOP | REEL 2500 | -40 to 105C | 0 | 4.45 | Y |
Evaluation Boards
Part Number | Description | Price | RoHS |
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EVAL-AD7795EBZ | Evaluation Board | 59 | Y |