Overview of DCV standard market

Entry-level units

Module name Type Based solution Output voltage Accuracy, ppm Tempco, ppm/K Cost,USD Notes Reviews Photo
AD584KH Taobao Zener IC AD584KH 2.5, 5.0, 7.5, 10.0 VDC +/-500ppm +/- 30 15$ External power, low cost 1
Voltagestandards.com .003% 10V Buried zener LT1021BCN8-10 10VDC 30ppm 4 typical Product page
Voltagestandards.com .002% Buried zener VRE305A 5VDC 25ppm 0.83 typical Product page
Voltagestandards.com .01% Buried zener REF5050 5VDC 100ppm 5 typical Product page
Voltagestandards.com Pentaref Buried zener LT1021BCN8-5 1.0, 1.9, 2.5, 5.0, 10V 0.2 to 0.01% ? Pentaref
Voltagestandards.com DMMCheck Buried zener LT1021BCN8-5 5VDC, 1mADC, Res(1KΩ, 10KΩ, 100K&Omega); 70ppm, 0.1%, 10ppm DMMCheck
Voltagestandards.com DMMCheck Plus Buried zener LT1021BCN8-5 5VDC, 1mADC, 5Vrms, 1mArms, 100Hz, 50% Duty, Res(100 Ω, 1KΩ, 10KΩ, 100KΩ) DMMCheck Plus
Geller SVR Buried zener AD587LN 10VDC 10 5 $40, EOL Gellerlabs
Geller SVR-T Buried zener AD587LN 10VDC 10 5 $75, EOL Gellerlabs
AD588BQ ebay +/-15V Zener AD588 5VDC,10VDC 1mV ? 15$

Entusiast level units / salvaged reference modules

Module name Type Based solution Output voltage Accuracy, ppm Tempco, ppm/K Cost,USD Notes Reviews Photo
HP 3458A A9 board (STD) Super-zener Linear LTZ1000A 7.2 direct VDC 2% +/- 8 100-700$ Available from Keysight
HP 3458A A9 board (002) Super-zener Linear LTZ1000A 7.2 direct VDC 2% +/- 4 985 Available from Keysight
HP 3458A A9 board (HFL) Super-zener Linear LTZ1000A 7.2 direct VDC 2% +/- 2 2195 Orderable from Keysight TBD
xDevs.com KX Super-zener Linear LTZ1000A and non-A 7.2 direct VDC 2% ? 300 Article
xDevs.com KX LC Ovenized zener 2 x Linear LM399 7VDC / 10-20VDC 2% ? 100 Article

Commercial DCV standards

Module name Type Based solution Output voltage Accuracy, ppm Tempco, ppm/K Cost,USD Notes Reviews
Fluke 731B Ref-amp SZA263 10 VDC 30(15 for new) +/- 1 EOL 1983
Fluke 732A Ref-amp SZA263 10 VDC 6 (3 for new) +/- 0.05 EOL 1990
Fluke 732B Ref-amp Linear LTFLU-1 10 VDC 2 +/- 0.04 Available from Fluke
Fluke 7001M Super-zener Linear LTZ1000 10 VDC 1.8 +/- 0.03 Available from Fluke?
Fluke 7004N Super-zener Linear LTZ1000 10 VDC 1.2 +/- 0.02 EOL 2010
Fluke 7010N Super-zener Linear LTZ1000 10 VDC 1.0 +/- 0.01 EOL 2010
Transmille 3000ZR ? ? 10 VDC 2.0 ? ?
Guildline 4400 Zener 8 x LM329 10 VDC 2.0 +/- 0.04 EOL 1995
Datron 4910 Super-zener 4 x Linear LTZ1000 10 VDC, 1VDC, 1.018VDC 1.5 +/- 0.05 EOL 2000
Datron 4910AV Super-zener 4 x Linear LTZ1000 10 VDC, 1VDC, 1.018VDC 1.0 +/- 0.05 EOL 2000
Datron 4911 Super-zener 4 x Linear LTZ1000 10 VDC ? +/- 0.05 EOL 2000
Datron 4912 Super-zener Linear LTZ1000 10 VDC, 1VDC ? +/- 0.05 EOL 2000
Valhalla 2734A Zener 8 × 1N827 Variable 3.0 +/- 0.05 EOL
РИТМ К6-10МН Zener ? 10 VDC 1.0 ?
РИТМ Н4-9 Zener ? 10 VDC 4.0 +/- 0.25
РИТМ Н4-12МН Zener ? 10 VDC 4.0 +/- 0.20
ВНИИФТРИ МН-1 Zener 4 × 6.4V 10 VDC 9 (6) ?
ВНИИФТРИ МН-2 Zener 2 × 6.4V 10 VDC 6 (6) ?
ВНИИФТРИ МН-3 Zener 1 × 6.4V 10 VDC 3 ?
МНИМИ Н4-100 Super-zener Linear LTZ1000 10 VDC 4 +/- 0.10

Voltage reference ICs

Unheated voltage references

Part number Vendor Vout VINmin VINmax NIQ TEMPCO TEMPCO eN LOWBW LT DRIFT DV MAX] DI MAX Hermetic? Abs.Acc Package Type Full P/N Reference COST
LT1031 Linear 10 11 40 1.2 1.7 10 5 0.6 15 4 25 Y 0.05 3pin TO-39 Z LT1031BCH Linear $9.00
LT1236-5 Linear 5 6 40 0.8 1.2 10 5 2 0.6 20 6 / 12 20 Y 0.05 LS-8 Z LT1236AILS8-5 Linear $7.23
LT1021C-5 Linear 5 7.2 40 0.8 1.2 10 20 3 0.6 15 2 / 6 20 Y 0.05 8pin TO-5 Z LT1021CCH-5 Linear $6.25
LT1027 Linear 5 8 40 2.2 3.1 15 3 2 0.6 (20) 6 / 12 -3 / 6 N 0.05 8-DIP Z LT1027CCN $8.42
LTC6655 Linear 4.096 4.6 13 5 7 5 2 1 60 (20) 5 / 25 N (Y) 0.025 MS8 (LS8) Linear
LT4161A Linear 4.096 4.6 20 0.035 0.05 50 3 3 8 60 2 / 8 12 / 30 N 0.04 8-SOIC BG LT4161ACS8-4#PBF $10.80
REF5050 TI 5 5.2 18 1 6.5 4 3 1 30 N 0.05 8-SOIC BG REF5050MDREP $12.26
REF5040 TI 4.096 4.3 18 1 5 3 3 1 30 N 0.05 8-SOIC BG REF5040MDREP $12.26
LM4140 TI 4.096 4.3 5.5 .27 .35 8 3 3 0.5 60 20 / 200 5 / 35 N 0.1 BG
VRE4141 Apex 4.096 4.3 5.5 .23 .32 8 0.5 1 2.2 50 20 / 200 1 / 20 N 0.05 8-SOIC n/a
VRE305 Apex 5 13.5 22 5 7 10 0.6 0.6 6 10 Y 0.01 8-DIP Z VRE305AD $93.33
AD586L AD 5 10.8 36 2 3 10 5 0.8 15 20 20 Y 0.05 8-CDIP Z AD586LQ Arrow $11.17
AD587K AD 10 13.5 36 2 4 <30 10 0.4 15 10 10 N 0.05 8-DIP Z AD587KNZ Newark $6.48
AD587U AD 10 13.5 36 2 4 <30 5 0.4 15 10 10 Y 0.05 8-CDIP Z AD587UQ $23.69
ADR4540B AD 4.096 4.2 15 0.7 0.95 10 2 0.66 25 1 / 10 25 / 80 N 0.02 8-SOIC U ADR4540BRZ $7.76
MAX6350 Maxim 5 8 36 2 3 15 1 0.5 0.6 (30) 30 1 / 6 N 0.025 8-DIP Z MAX6350CPA Arrow $12.77
MAX6341 Maxim 4.096 8 36 2 3 15 1 0.5 0.6 (30) 7 1 / 6 N 0.025 8-DIP Z MAX6341CPA+ $12.13
MAX6241 Maxim 4.096 8 36 2 3 15 2 1 0.6 (20) 10 / 18 1 / 6 N 0.025 8-DIP Z MAX6241ACPA+ $8.42
1N829A AF 6.2 7.5 5 Y DO-35 Z JAN 1N829 $4.00

Heated voltage references

Part number Vendor Vout VINmin VINmax NIQ Iout TEMPCO TEMPCO eN LOWBW LT DRIFT DV MAX DI MAX Hermetical? Abs.accuracy % Package type Type COST
LTZ1000 LT 7.2 10 VDC 35 V
0.03 1.2 µV / 0.15ppm 2µV @ 65°C Y 2 8pin TO-5 Proprietary buried zener $42.85
LTZ1000A LT 7.2 10 VDC 35 V
0.03 1.2 µV / 0.15ppm 2µV @ 65°C Y 2 8pin TO-5 Proprietary buried zener $54.50
LM399A LT 6.95 1 0.3 8 Y 5 4pin TO-46 Proprietary buried zener $9.37
LM399 LT 6.95 1 0.3 8 Y 5 4pin TO-46 Proprietary buried zener $6.64
LM299 LT 6.95 1 0.3 8 Y 5 4pin TO-46 Proprietary buried zener Obsolete
LM199 LT 6.95 1 0.3 8 Y 5 4pin TO-46 Proprietary buried zener Obsolete

notes – practical examples

REF5050ID REF5-01
AD587LQ / LN SVR
LM399
VRE305
MAX6350

  • long-term drift specified for hermetic pkg options only. (values)

Die photograph collection

LTZ1000CH / ACH

LM199/299/399

Tesla MAC199/MAB299/MAB399

Opamps noise performance table

nVPK-PK nV/√Hz pAPK-PK pA/√Hz
AD797 50 0.9 2.0
AD8599 76 1.07 2.0
AD8675 100 2.8 0.3
AD8676 100 2.8 0.3
ADA4004 100 1.8 3.5
ADA4075 60 2.8 1.2
ADA4522 117 5.8 16 0.8
ADA4528 99 5.9 10 0.5
OP27A 80 3.5 0.4
OP270 80 3.6 0.6
OPA211 80 1.1 3.2
OPA2211 80 1.1 1.7
OPA338 140 7 0.1
MAX44250/1/2 123 5.9 0.6
TLE2027C 50 2.5 0.8

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Author: Ilya Tsemenko
 Created: Oct. 1, 2015, 8:39 a.m.
 Modified: Oct. 17, 2017, 12:39 p.m.

References

  1. Radiokot forum : Mickle's summary on reference units
  2. EEVBlog : VREF IC table reference
  3. Amobbs CN: lymex/bg2vo thread about DCV Refs