5V V Volt 5VDC Five VDC Voltage Reference Standard +-4ppm +-0.0004% USA-Made Laboratory Precision!

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Seller: kaysert ✉️ (2,276) 100%, Location: Brookfield, Wisconsin, US, Ships to: WORLDWIDE, Item: 262519600665 5V V Volt 5VDC Five VDC Voltage Reference Standard .

The item is a 5.0 0000VDC Precision Voltage Reference Standard. The suggested INPUT voltage is 9.5 VDC. It accepts 9.5 VDC to 35.0VDC INPUT. The OUTPUT is 5.00000VDC ±0.0004% (±4ppm) at 9 .5VDC (+-0.1VDC) INPUT.

We also sell 2.5VDC and 10.0VDC precision references. See our other listings.

The device has (4) four nonmagnetic, gold-flashed, color-coded banana-sockets w/binding posts for INPUT and OUTPUT connections. The internal connections are soldered or bolted. The regulator IC is socketed for low hysteresis and to prevent heat damage to the IC by soldering.

The mainboard is a low-hysteresis PCB design, which prevents output drift due to mechanical stresses on the regulator IC and other internal components. We integrate the reference IC (LT1019AC-5.0) with (2) low-pass filters for noise-suppression, shielding against induced thermoelectric effect, and temperature compensation.

The +-0.0004% standard can be power-cycled without affecting the absolute accuracy (+-4ppm). Each unit is aged under power for 40 days before final calibration.

Theory of operation: DC input is fed through a capacitor configured with a die-embedded precision resistor within the regulator IC. This shorts out common-mode noise on the input side using a class 1 low-pass filter . The regulator IC employs a laser-trimmed zener diode as a precision voltage regulator and input (+) voltage feed to the on-die op amp. The op amp operates in voltage-feedback mode with the gain set by a voltage divider with an in-loop, precision external trimmer.

The voltage produced by the zener reference is divided to an output that is within +-1.5mVDC of 5.0VDC. The op amp output is cleaned of high-frequency noise produced by the on-chip zener, by an output low-pass filter that employs an on-die resistor and an external capacitor. The resultant signal has a noise level of <=2uVp-p, which is easily filtered by bench DMMs.

The gain (negative gain) of the on-die op amp is trimmed by a potentiometer selected for performance over time and temperature. Manual adjustment of the op-amp gain (output) trim-pot while monitoring the calibration on an Agilent 3458A 8-1/2 digit multimeter, results in unparalleled precision for a device in this market tier.

Secondarily, the unit employs passive temperature compensation (TC) using a precision thermistor and heat-transfer coupling between the regulator IC and the TC thermistor. The heat-transfer coupler lowers the temperature difference over time, between the regulator IC and the TC thermistor, which is the same as saying it lowers the delta(deltaT/time) between the regulator IC and TC thermistor.

The thermistor disciplines the on-chip op-amp gain to change the device output voltage in an equal but opposite magnitude to the temperature drift of the raw regulator IC, which provides:

(TdriftRegIC= ~5ppm/degC) + deltaVout=~(-)5ppm/degC)=0ppm temperature drift between 17C and 26C (64F and 80F). But that is in an ideal world! In our situation the drift has been reduced to +- 5 ppm over the range 16C-26C, which is about 1/10 of the typical temperature drift for the LT1019A-5.0 without TC.

This is a +-4ppm 5.0VDC standard that fits in a pants or shirt pocket, weighs about 3 ounces (84 grams), maintains its calibration across power cycles, and can be powered by a DC power supply (switching or linear, or even a wall-wart) OR inexpensive 9V batteries.

The internal noise created by the device is: 2uVp-p. The +-0.0004% standard consumes roughly 30mW, so it may be powered economically by (2) 9V alkaline batteries wired in series. (2) 9V batteries will power the unit continuously for months. From cold start the device settles in one-half hour. Warm cycling requires several seconds to five minutes to resettle.

Maximum output load is 10.0 mA. The unit is durable and maintenance-free. It measures approximately 1.5" x 2.25" x 1.75". Calibration is available any time. Recommended calibration interval is (1) one year. Contact the seller on the eBay email system for calibration service. Test equipment and interconnect cords are not included. Questions, use the link below. Thank you for viewing our eBay.com listing!

Some qualitative aspects: this device is a revolutionary voltage standard at an affordable price. If you want to get your lab synced to the SI volt, our 0.0004% standard provides one possible way to do it. The device does not require continuous power. It will endure power cycling and retain its absolute accuracy of +-4ppm. Therefore, the device is rated for drift per 1,000 hours (40 days continuous) of use.

Nothing else will get the SI volt in the door at a lower cost. We have 100% positive feedback. We've sold hundreds of voltage standards on eBay! They have been tested with the finest instruments available.

Thank you for your interest in our eBay listing. Questions, use the link below!

  • Condition: New
  • Brand: K_Products
  • Model: VS-4PPM-5
  • MPN: NM4PPMSC
  • Country/Region of Manufacture: United States
  • Accuracy: 0.0004% 4ppm
  • Type: Zener
  • Output: 5.0 VDC

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