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TL3474A: Thermal resistance

Hidekazu Someno
Expert 5130 points

Part Number: TL3474A
Other Parts Discussed in Thread: OPA4991, TLV9354

Hi team,

In this IC's datasheet, there is only tRθJA in absolute maximum ration table.

Would you tell me other thermal parameters( ψJT, RθJC(top) , RθJB etc) except tRθJA  of TL3474AIDR?

Regards,

H.Someno

  • 0
    TI__Mastermind 24112 points

    Hello Someno-san, 

    The TL347A datasheet is limited as it is a rather old device and in turn an old datasheet.

    Can you tell me about your application requirements?
    This way I may recommend a newer part (with a newer datasheet) that will provide the thermal parameters you require. 

    All the best,
    Carolina

  • 0 in reply to Caro Gomez
    TI__Expert 5130 points

    Hi, Carolina

    A customer selected this part as the replacement part of competitor's old part and is going to start the evaluation of TL3474A next week.

    If you have other suitable parts, please tell me them.
    The key requirements for the IC are;
    - GBW):　>3～4MHz
    - 4 channels
    - Vio(max) < Max10mV(TYP1mV)
    - PKG: Narrow SOP-14

    Regards,
    H.Someno

  • +1
    TI__Mastermind 24112 points

    Hello Someno-san, 

    I recommend that the customer use OPA4991 (TSSOP-14).

    If price is a concern and it is okay that GBW is 3.5MHz, then the TLV9354 is also an appropriate replacement. 

    ► Part Number TL3474A TLV9354 OPA4991
    Manufacturer TI TI TI
    Channel Count 4 4 4
    Vs Range 4V to 36V 4.5V to 40V 2.7V to 40V
    GBW (MHz) 4 3.5 4.5
    Slew Rate (V/µs) 10 20 21
    Vos max @ 25oC (mV) 3 1.8 0.75
    Vos Drift, typ (µV/oC) 10 1.5 0.3
    Rail-to-Rail In to V- In to V-, Out In, Out
    IQ typ (mA) 3.5 0.65 0.56
    VN (nV/√Hz) 49 15 10.8
    ISC typ (mA) 27 60 75
    IBIAS (typ) (pA) 100000 10 10
    Operating Temperature (°C) -40 to 105 | 0 to 70 -40 to 125 -40 to 125
    Available Packages PDIP-14, SOIC-14, TSSOP-14 SOIC-14, | TSSOP-14 | SOT23-14 SOIC-14 | TSSOP-14 | X2QFN-14 | SOT23-14
    Price (1ku web $) $0.450 $0.501 $0.864

    I assume that by "Narrow SOP-14" you mean "TSSOP (PW) 14", please let me know if my assumption is incorrect. 

    The thermal parameters for the quad channel are located on Page 7 of the TLV9354 datasheet and Page 12 of the OPA4991 datasheet. 

    All the best,
    Carolina