View source for CV SHIFT on ER-PROTO-02

== Features ==

* +/- 12V (bipolar) to + 5V (unipolar) level shifters
* Three channels
* Opamp buffers
* DC coupled

=== Level Shifter Function ===

* +/- 5V to 0-3V example

[[file:OpAmp-Level-Shifter.gif]]

* IN RANGE = 24V
* OUT RANGE = 5V
* GAIN = 0.2083
* RF = 68K
* VMID = 2.5V
* RIN/SHUNT = 326.4K
* USE 330K

== Build ==

* One of three channels shown

[[file:ER-LEVEL-SH_Sch.PNG]]

* Jacks connector

[[file:ER-LEVEL-SH_Sch_J29.PNG]]

* Power
** Diodes and resistors are on daughtercard

[[file:ER-LEVEL-SH_Sch_J6_PWR.PNG]]

== ER-PROTO-02 Set ==

[[File:ER-PROTO-02-SET_FRONT_REAR-3D-720px.png]]

== Nets ==

<PRE>
  (nets
    (net (code "1") (name "+5V")
      (node (ref "J6") (pin "11") (pinfunction "Pin_11") (pintype "passive"))
      (node (ref "J6") (pin "12") (pinfunction "Pin_12") (pintype "passive"))
      (node (ref "R1") (pin "2") (pintype "passive"))
      (node (ref "U1") (pin "4") (pinfunction "V+") (pintype "power_in")))
    (net (code "4") (name "/CH1-")
      (node (ref "R3") (pin "2") (pintype "passive"))
      (node (ref "R9") (pin "1") (pintype "passive"))
      (node (ref "U1") (pin "2") (pinfunction "-") (pintype "input")))
    (net (code "5") (name "/CH1_OUT")
      (node (ref "R12") (pin "1") (pintype "passive"))
      (node (ref "R9") (pin "2") (pintype "passive"))
      (node (ref "U1") (pin "1") (pintype "output")))
    (net (code "6") (name "/CH2-")
      (node (ref "R10") (pin "1") (pintype "passive"))
      (node (ref "R6") (pin "2") (pintype "passive"))
      (node (ref "U1") (pin "6") (pinfunction "-") (pintype "input")))
    (net (code "7") (name "/CH2_OUT")
      (node (ref "R10") (pin "2") (pintype "passive"))
      (node (ref "R11") (pin "1") (pintype "passive"))
      (node (ref "U1") (pin "7") (pintype "output")))
    (net (code "8") (name "/CH3-")
      (node (ref "R13") (pin "2") (pintype "passive"))
      (node (ref "R16") (pin "1") (pintype "passive"))
      (node (ref "U1") (pin "9") (pinfunction "-") (pintype "input")))
    (net (code "9") (name "/CH3_OUT")
      (node (ref "R16") (pin "2") (pintype "passive"))
      (node (ref "R17") (pin "1") (pintype "passive"))
      (node (ref "U1") (pin "8") (pintype "output")))
    (net (code "12") (name "/IN1")
      (node (ref "J29") (pin "10") (pinfunction "J1_T") (pintype "passive"))
      (node (ref "R4") (pin "1") (pintype "passive")))
    (net (code "13") (name "/IN2")
      (node (ref "J29") (pin "12") (pinfunction "J3_T") (pintype "passive"))
      (node (ref "R7") (pin "1") (pintype "passive")))
    (net (code "14") (name "/IN3")
      (node (ref "J29") (pin "14") (pinfunction "J5_T") (pintype "passive"))
      (node (ref "R14") (pin "1") (pintype "passive")))
    (net (code "15") (name "/OUT1")
      (node (ref "J29") (pin "8") (pinfunction "J2_T") (pintype "passive"))
      (node (ref "R12") (pin "2") (pintype "passive")))
    (net (code "16") (name "/OUT2")
      (node (ref "J29") (pin "6") (pinfunction "J4_T") (pintype "passive"))
      (node (ref "R11") (pin "2") (pintype "passive")))
    (net (code "17") (name "/OUT3")
      (node (ref "J29") (pin "4") (pinfunction "J6_T") (pintype "passive"))
      (node (ref "R17") (pin "2") (pintype "passive")))
    (net (code "18") (name "/V2.5")
      (node (ref "R15") (pin "1") (pintype "passive"))
      (node (ref "R5") (pin "1") (pintype "passive"))
      (node (ref "R8") (pin "1") (pintype "passive"))
      (node (ref "U1") (pin "13") (pinfunction "-") (pintype "input"))
      (node (ref "U1") (pin "14") (pintype "output")))
    (net (code "19") (name "GND")
      (node (ref "R13") (pin "1") (pintype "passive"))
      (node (ref "R2") (pin "1") (pintype "passive"))
      (node (ref "R3") (pin "1") (pintype "passive"))
      (node (ref "R6") (pin "1") (pintype "passive"))
      (node (ref "U1") (pin "11") (pinfunction "V-") (pintype "power_in")))
    (net (code "20") (name "Net-(C1-Pad1)")
      (node (ref "C1") (pin "1") (pintype "passive"))
      (node (ref "R1") (pin "1") (pintype "passive"))
      (node (ref "R2") (pin "2") (pintype "passive"))
      (node (ref "U1") (pin "12") (pinfunction "+") (pintype "input")))
    (net (code "21") (name "Net-(R4-Pad2)")
      (node (ref "R4") (pin "2") (pintype "passive"))
      (node (ref "R5") (pin "2") (pintype "passive"))
      (node (ref "U1") (pin "3") (pinfunction "+") (pintype "input")))
    (net (code "22") (name "Net-(R7-Pad2)")
      (node (ref "R7") (pin "2") (pintype "passive"))
      (node (ref "R8") (pin "2") (pintype "passive"))
      (node (ref "U1") (pin "5") (pinfunction "+") (pintype "input")))
    (net (code "23") (name "Net-(R14-Pad2)")
      (node (ref "R14") (pin "2") (pintype "passive"))
      (node (ref "R15") (pin "2") (pintype "passive"))
      (node (ref "U1") (pin "10") (pinfunction "+") (pintype "input")))
</PRE>