OPA994: MAX4162EUK+

Ra Krishna

Part Number: OPA994
Other Parts Discussed in Thread: TLV2381, TLV9101

Hi,
I'm Rama Krishna form Schneider Electric.

Currently we are using MAX4162EUK+ rail-to-rail op-amp from Maxim Integrated, Now we are looking for FFF Alternate.
Can you please suggest an alternate with similar or better specification ASAP.

Project: DCS,
Application: Sensor Interface board.
Qty: 10K/Year.
Design & Production location: USA.

Regards,
Rama Krishna.

over 1 year ago

0 Clemens Ladisch over 1 year ago

Guru 318050 points

The cross-reference tool points to the OPA994, but a power consumption of 1.35 mA is probably not OK for somebody who chose the MAX4162.

Here is a list of low-power, rail-to-rail, 10 V opamps:
ti.com/amplifier-circuit/op-amps/general-purpose/products.html#~78=In;Out&480=1;1&1261max=10;48&1typ=0.00032;0.05
(All of them have the same pinout.)

The fastest one, the TLV2381, has a GBW of 160 kHz. You can get lower power consumption with an even slower opamp.

0 Caro Walter over 1 year ago in reply to Clemens Ladisch

TI__Mastermind 22312 points

Hey Rama,

Thanks for posting on e2e

Could you share more details about the application so we may make an educated suggestion?
The following would help narrow down:

Voltage power supply
- low current consumption? Battery operated?
Expected input/output voltage and frequency range (if applicable)
I am not sure what "FFF Alternate" means, do you mean pin-to-pin compatible?
- I see the used part number is SOT-23 5 pin. Is this required?

All the best,
Caro

0 Ra Krishna over 1 year ago in reply to Caro Walter

Prodigy 145 points

Single Voltage supply range: 2.5 V to 10V

Dual supply voltage range: 1.25V to 5V

Freq range: 200 KHz.

refer : https://www.analog.com/media/en/technical-documentation/data-sheets/MAX4162-MAX4164.pdf
datasheet for more details.

Regards,

Rama Krishna.

0 Clemens Ladisch over 1 year ago in reply to Ra Krishna

Guru 318050 points

These are the limits from the datasheet, but we want to know the actual characteristics needed in your specific application.

There is no exact replacement for these numbers. The TLV2381 has 160 kHz while consuming 7 µA, while the TLV9101 has 1100 kHz with 120 µA; there is nothing in between.

0 Ra Krishna over 1 year ago in reply to Clemens Ladisch

Prodigy 145 points

As per comparison the TLV2381 suits to be the closer option, but the CMRR & PSRR are low than requirement(CMRR:100dB, PSRR: 100dB).
But TLV9101 has high frequency and high current consumption(req: 45uA).
Required single supply vol max: 10V(many applications with in this range eg: 5V, 6.6V, 8.5V, 9V).
Required dual supply vol max: (3.3V required), so overall required 2.5V to 10V.

Please suggest an alternate with specifications as TLV2381, but better CMRR & PSRR ratio.

0 Caro Walter over 1 year ago in reply to Ra Krishna

TI__Mastermind 22312 points

Hello Ra,

Does this have to be pin to pin in the same package?

All the best,
Caro

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OPA994: MAX4162EUK+