OPA4387: Fully Differential Amplifier with Chopper available?

Bernd Hafen1

Part Number: OPA4387
Other Parts Discussed in Thread: PGA281, PGA280

Dear Team,
1) are there Fully Differential Amplifier available with internal Chopper?
Aim:
- LowNois < 10 nV√Hz at 1 kHz (ideally<2nV)
- Zero drift: <±0.010 µV/°C
- Single supply: 5.0 V

2) OPA4387, are there all 4 Chopper-Frequencies "synchron" or produce each OP-AMP his own Copper-Frequency?

Kind regards
Bernd

7 months ago

0 Marek Lis 7 months ago

TI__Guru* 75091 points

Fully differential amplifiers are typically used in high-speed applications where high DC precision like offset temp drift is not critical. For this reason, I do not believe we have any FDA with internal chopping architecture. The only near-zero drift programmable gain amplifier are PGA280 and PGA281.

The following is the link to list of fully differential amplifiers: https://www.ti.com/product-category/amplifiers/fully-differential/products.html#sort=2max;asc&

OPA4387 quad uses a single oscillator but each channels is buffered separately.

Amplifiers

Amplifiers forum

OPA4387: Fully Differential Amplifier with Chopper available?