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I want to do high resolution µOhm measurement with a battery powered, small device. So differential voltages below 50µV should be measured fairly slow (0,1 sec. - 1 sec.) The noise-free resolution should be < 1µV. I thought of using 4-wire connection and doing current-chopping with full-bridge-mosfets and using a shunt resistor for creating… (Show more)
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Hi ADI,   I got EVAL-AD7176-2SDZ (Rev-A), and I use it to test audio signal.     I use AD7176-2 to sample a pure 12.5 kHz 0.1 Vrms sine wave, and sample rate is 125kHz. But there is a stable low frequency noise as below picture, so it make the wave envelope is unstable.   I   My setting as below:   The attachment is my test data. Do you… (Show more)
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The device's data sheet just says that due to the low noise input amplifier, it can tolerate significant impedance bridge resistances. Can anybody put a figure on this? We generally fit 350 or 700 Ohm bridges but would like to change to 2K.
in Precision ADCs
Hi , when i used ADAS1000 to collect my ECG singal, the sharp noise my occured , how to resolve this problem?
in Precision ADCs
Looking for space qualified QML V, Rad Hard sigma delta A/D Converters. Don't see any on Analog Devices webpage or DLA site. Does AD offer any, and if so could you point me to datasheet?
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Dear guys,   I use the ADAS1000 as the ECG sampling frontend IC. But there always is sharp noise in the signal as follows. How should I eliminate it? I have enabled the RL driving and Shield driving. So many thanks!  
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Hi all,   In the datasheet 17 page at AD2s1210,  Loss of Position Tracking Detection LOT can be indicated for step changes in position (such as after a RESET signal is applied to the AD2S1210). It is also useful as a built-in test to indicate that the tracking converter is functioning properly.   What does it means,  "for step changes in… (Show more)
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Hi All,   I have a question about AD7606 set up time. Please take a look at the attached file. How long should I estimate the set up time?   Thanks Kazu
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I use AD7785 in circuit like the demo board and have connected a strain gauge. At zero load at this gauges I get values from the ADC between 508000 and 520000. But the REF Voltage is stable and nothing is changed. I use gain 128 but also at gain 64 the values vary same. What can be wrong?
in Precision ADCs
Hi,   We use an AD7609 with the parallel interface and sample values at 50KHz. In the measured values are some peaks to 0V or -5V.       We noticed that the data lines DB14 and DB15 looks different then DB0 to DB13.            The bus DB14 / 15 is also pulled high although CS is no longer active.          Has somebody a idea? Do we have… (Show more)
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