AMB Laboratories Mini3, Manual

Page: 16 / 30

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LED1, LED2: T-1 (3mm)
Lead spacing 0.100" (2.5mm)
Your choice of size and color (affects value of R6 and R7)
Notes about D2 and D3 :
You may use
schottky diodes (surface mount, SMB/DO-214AA) in these
locations. The circuit board has pads to accommodate this option. These schottky diodes
have lower forward voltage drop than standard diodes.
Voltage Regulators
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U1: Adjustable 100mA positive voltage regulator TO-92 (Mouser, Digi-Key, Newark,
Farnell)
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U2: Fixed 12V 1A positive voltage regulator TO-220
o
(Mouser, Digi-Key, Newark, Farnell)
o
(Digi-Key, Newark, Farnell)
Rail splitter
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U3: Texas Instruments TO-92.
(AMB audio shop, Mouser, Digi-Key, Newark, Farnell)
There is no substitute part for this.
Opamps
The recommended opamps for Mini³ "high performance" edition is as follows:
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U4: Texas Instruments/Burr Brow(SOIC-8)
(AMB audio shop, Mouser, Digi-Key,
Farnell)
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U5: Analog Devices (SOIC-8)
(AMB audio shop)
The recommended opamps for Mini³ "extended runtime" edition is as follows:
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U4: National Semiconductor (AMB audio shop, Digi-Key, Farnell)
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U5: National Semiconductor (SOIC-8)
(AMB audio shop, Digi-Key, Farnell)
Notes about opamps :
AD8397ARZ may be substituted for the AD8397ARDZ with a degradation of heat dissipation
performance. Other opamp substitutions are not recommended.
Connectors
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J1: DC power jack, barrel type, 2.5mm center pin, board-mount
o
Kycon (AMB audio shop, Mouser)
o
Kobiconn (Mouser)
o
CUI (Digi-Key)
o
other similar
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J2, J3: 3.5mm stereo mini phone jack, board-mount, isolated