Datasheet

'V
O_CM
'V
OUT
LMH6518
www.ti.com SNOSB21C –MAY 2008–REVISED JULY 2013
Table 1. Definition of Terms and Specifications
1. A
V_CM
(dB) Change in output offset voltage (ΔV
OOS
) with respect to the change in input common mode
voltage (ΔV
I_CM
)
2. A
V_DIFF
(dB) Gain with 100Ω differential load
3. CM Common Mode
4. CMRR (dB) Common Mode rejection defined as: A
V_DIFF
(dB) - A
V_CM
(dB)
5. CMRR_CM Common Mode rejection relative to V
CM
defined as:
ΔV
OOS
/ΔV
CM
6. HG Preamp High Gain
7. Ladder Ladder Attenuator setting (0-20 dB)
8. LG Preamp Low Gain
9. Max Gain Gain = 38.8 dB
10. Min Gain Gain = −1.16 dB
11. +Out Positive Main Output
12. −Out Negative Main Output
13. +Out Aux Positive Auxiliary Output
14. −Out Aux Negative Auxiliary Output
15. PB Phase Balance defined as the phase difference between the complimentary outputs relative to
180°
16. PSRR Input referred V
OOS
shift divided by change in V
CC
17. PSRR_CM Output common mode voltage change (ΔV
O_CM
) with respect to V
CC
voltage change (ΔV
CC
)
18. V
CM
Input pin voltage that sets Main output CM
19. V
CM_Aux
Input pin voltage that sets Auxiliary output CM
20. V
I_CM
Input CM voltage (average of +IN and −IN)
21. ΔV
IN
(V) Differential voltage across device inputs
22. V
OOS
DC offset voltage. Differential output voltage measured with inputs shorted together to V
CC
/2
23. V
O_CM
Output common mode voltage (DC average of V
+OUT
and V
−OUT
)
24. V
OS_CM
CM offset voltage: V
O_CM
- V
CM
25. ΔV
O_CM
Variation in output common mode voltage (V
O_CM
)
26. Balance Error. Measure of the output swing balance of “+OUT” and “−OUT”, as reflected on
the output common mode voltage (V
O_CM
), relative to the differential output swing (V
OUT
).
Calculated as output common mode voltage change (ΔV
O_CM
) divided by the output differential
voltage change (ΔV
OUT
, which is nominally around 700 mV
PP
)
27. ΔV
OUT
Change in differential output voltage (Corrected for DC offset (V
OOS
))
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