LMH6518_15 Datasheet, PDF (7/41 Pages) Texas Instruments – LMH6518 900 MHz, Digitally Controlled, Variable Gain Amplifier

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1.
A_{V_CM} (dB)
2.
A_{V_DIFF} (dB)
3.
CM
4.
CMRR (dB)
5.
CMRR_CM
6.
HG
7.
Ladder
8.
LG
9.
Max Gain
10.
Min Gain
11.
+Out
12.
−Out
13.
+Out Aux
14.
−Out Aux
15.
PB
16.
PSRR
17.
PSRR_CM
18.
V_CM
19.
V_{CM_Aux}
20.
V_{I_CM}
21.
ΔV_IN (V)
22.
V_OOS
23.
V_{O_CM}
24.
V_{OS_CM}
25.
ΔV_{O_CM}
26.
V_{O_CM}
V_OUT
27.
ΔV_OUT
LMH6518
SNOSB21C – MAY 2008 – REVISED JULY 2013
Table 1. Definition of Terms and Specifications
Change in output offset voltage (ΔV_OOS) with respect to the change in input common mode
voltage (ΔV_{I_CM})
Gain with 100Ω differential load
Common Mode
Common Mode rejection defined as: A_{V_DIFF} (dB) - A_{V_CM} (dB)
Common
Mode
rejection
relative
to
V_CM
defined
as:
ΔV_OOS /ΔV_CM
Preamp High Gain
Ladder Attenuator setting (0-20 dB)
Preamp Low Gain
Gain = 38.8 dB
Gain = −1.16 dB
Positive Main Output
Negative Main Output
Positive Auxiliary Output
Negative Auxiliary Output
Phase Balance defined as the phase difference between the complimentary outputs relative to
180°
Input referred V_OOS shift divided by change in V_CC
Output common mode voltage change (ΔV_{O_CM}) with respect to V_CC voltage change (ΔV_CC)
Input pin voltage that sets Main output CM
Input pin voltage that sets Auxiliary output CM
Input CM voltage (average of +IN and −IN)
Differential voltage across device inputs
DC offset voltage. Differential output voltage measured with inputs shorted together to V_CC/2
Output common mode voltage (DC average of V_+OUT and V_−OUT)
CM offset voltage: V_{O_CM} - V_CM
Variation in output common mode voltage (V_{O_CM})
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)
Change in differential output voltage (Corrected for DC offset (V_OOS))
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