LM7321: LM7321 SOT23-5 max height of 1.45mm?

Avihai O

Part Number: LM7321
Other Parts Discussed in Thread: OPA172, OPA2210, OPA1652, OPA1678

Hi,

I'd like to use this amplifier, but I find it strange that a SOT23-5 has a height tolerance up to 1.45mm while other SOT23 are ofter up to 1.1mm.

Is the 1.45mm a mistake or it is actually an irregular height?

If this is the actual height, do you have an identical alternative with a heights of max 1.1mm?

Thanks

0 Ron Michallick over 3 years ago

Avihai,

The height plus leads could be up to 1.45

The actual package (without leads) is 1.1, but this is a (reference value) "typical"

Do you have an example where the same spec is 1.1mm max?

0 Avihai O over 3 years ago in reply to Ron Michallick

Hi,

I see that you are correct and what I saw was TSOT-23.

Does an equivalent to the LM7321 exist with a lower height?

Thanks

0 Ron Michallick over 3 years ago in reply to Avihai O

Avihai,

For single channel op amp with [Supply 30V, Gain bandwidth 15MHz, Slew Rate 14V/us, rail to rail in and out] there is only LM7321.

To find a new device in a thinner package I will need to downgrade at least one of the parameters

What are the key parameters required in a replacement device?

0 Avihai O over 3 years ago in reply to Ron Michallick

I can reduce the supply voltage to 20V.

+1 Ron Michallick over 3 years ago in reply to Avihai O

Avihai,

The closest device I found was OPA172IDCKR. Maximum height is 1.1mm.

For dual op amp, OPA2210IDRGR, OPA1652AIDRGR, and OPA1678IDRGR are even thinner, 0.8mm maximum.

OPA172
GBW (Typ) (MHz) 10
Slew rate (Typ) (V/us) 10
Rail-to-rail In to V-, Out
Vos (offset voltage @ 25 C) (Max) (mV) 1
Iq per channel (Typ) (mA) 1.6

OPA2210
GBW (Typ) (MHz) 18
Slew rate (Typ) (V/us) 6.4
Rail-to-rail Out
Vos (offset voltage @ 25 C) (Max) (mV) 0.035
Iq per channel (Typ) (mA) 2.2

OPA1652
GBW (Typ) (MHz) 18
Slew rate (Typ) (V/us) 10
Rail-to-rail Out
Vos (offset voltage @ 25 C) (Max) (mV) 1.5
Iq per channel (Typ) (mA) 2

OPA1678
GBW (Typ) (MHz) 16
Slew rate (Typ) (V/us) 9
Rail-to-rail Out
Vos (offset voltage @ 25 C) (Max) (mV) 2
Iq per channel (Typ) (mA) 2

0 Avihai O over 3 years ago in reply to Ron Michallick

Thank you!

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