TL-07x vs TL-08x Op Amps

[Norm Dresner]

I just glanced at the schematics for the two subject Op Amps in my '92 TI
data book and they look identical. Is it therefore reasonable to conclude
that the TL-07x Low Noise Op Amps are just selected from the same production
line that makes the TL-08x?

TIA
Norm

 

[Walter Harley]

"Norm Dresner" <ndrez@att.net> wrote in message
news:Je_Ic.247895$Gx4.56841@bgtnsc04-news.ops.worldnet.att.net...

I just glanced at the schematics for the two subject Op Amps in my '92 TI
data book and they look identical. Is it therefore reasonable to conclude
that the TL-07x Low Noise Op Amps are just selected from the same
production
line that makes the TL-08x?

Glancing at the TI datasheets, they seem to give identical noise specs
(18nV/root-Hz, .01pA/root-Hz) for both families. Same slew rate, same unity
gain bandwidth, same power supply consumption, same harmonic distortion.
But the input bias current for the TL08x is 30pA typical compared to the
TL07x's 60pA typical, if that means anything.

 

[Don Klipstein]

In article <Je_Ic.247895$Gx4.56841@bgtnsc04-news.ops.worldnet.att.net>,
Norm Dresner wrote:

I just glanced at the schematics for the two subject Op Amps in my '92 TI
data book and they look identical. Is it therefore reasonable to conclude
that the TL-07x Low Noise Op Amps are just selected from the same production
line that makes the TL-08x?

I believe they are different. I have had some circuits that were stable
with TLO84's oscillate at ultrasonic frequencies with TLO74's.

- Don Klipstein (don@misty.com)

 

[Roger Hamlett]

"Norm Dresner" <ndrez@att.net> wrote in message
news:Je_Ic.247895$Gx4.56841@bgtnsc04-news.ops.worldnet.att.net...

I just glanced at the schematics for the two subject Op Amps in my '92
TI
data book and they look identical. Is it therefore reasonable to
conclude
that the TL-07x Low Noise Op Amps are just selected from the same
production
line that makes the TL-08x?
The schematic for each is the same. However the 07 family, have

significantly higher typical large signal differential voltage gain, and
lower input bias current. I'd suspect they ave slightly different internal
'resistor' values, representing slight 'tweaks' to a common circuit,
rather than being made from the same dies. They do behave slightly
differently in some circuits.

Best Wishes