LMH6503 Datasheet, PDF (4/33 Pages) National Semiconductor (TI) – Wideband, Low Power, Linear Variable Gain Amplifier

LMH6503
SNOSA78E – OCTOBER 2003 – REVISED APRIL 2013
www.ti.com
Electrical Characteristics⁽¹⁾
Unless otherwise specified, all limits ensured for T_J = 25°C, V_S = ±5V, A_V(MAX) = 10, V_CM = 0V, R_F = 1kΩ, R_G = 174Ω, V_{IN_DIFF}
= ±0.1V, R_L = 100Ω, V_G = +1V. Boldface limits apply at the temperature extremes.
Parameter
Test Conditions
Min ⁽²⁾
Typ ⁽²⁾
Max ⁽²⁾
Units
Frequency Domain Response
BW
-3dB Bandwidth
GF
Gain Flatness
Att Range Flat Band (Relative to Max Gain)
Attenuation Range⁽³⁾
BW
Control
Gain Control Bandwidth
V_OUT < 0.5_PP
V_OUT < 0.5_PP, A_V(MAX) = 100
V_OUT < 0.5V_PP,
−1V < V_G < 1V, ±0.2dB
±0.2dB Flatness, f < 30MHZ
±0.1dB, f < 30MHZ
V_G = 0V⁽⁴⁾
135
MHz
50
40
MHz
20
MHz
6.6
100
MHz
PL
Linear Phase Deviation
DC to 60MHz
1.6
deg
G Delay Group Delay
DC to 130MHz
2.6
ns
CT (dB) Feed-through
V_G = −1.2V, 30MHz (Output
Referred)
−48
dB
GR
Gain Adjustment Range
f < 10MHz
f < 30MHz
79
dB
68
Time Domain Response
t_r , t_f
OS%
SR
Rise and Fall Time
Overshoot
Slew Rate
0.5V Step
0.5V Step
4V Step⁽⁵⁾
2.2
10
1800
ns
%
V/µs
ΔG Rate Gain Change Rate
V_IN = 0.3V, 10%−90% of final
output
4.6
dB/ns
Distortion & Noise performance
HD2
2^nd Harmonic Distortion
HD3
3^rdHarmonic Distortion
THD
Total Harmonic Distortion
En tot
Total Equivalent Input Noise
2V_PP, 20MHz
2V_PP, 20MHz
2V_PP, 20MHz
1MHz to 150MHz
−60
dBc
−61
dBc
−57
dBc
6.6
nV/√Hz
I_n
Input Noise Current
DG
Differential Gain
1MHz to 150MHz
f = 4.43MHz, R_L = 150Ω, Neg.
Sync
2.4
pA/√Hz
0.15
%
DP
Differential Phase
f = 4.43MHz, R_L = 150Ω, Neg.
0.22
deg
Sync
(1) Electrical Table values apply only for factory testing conditions at the temperature indicated. Factory testing conditions result in very
limited self-heating of the device such that T_J = T_A. No ensured specification of parametric performance is indicated in the electrical
tables under conditions of internal self-heating where T_J > T_A.
(2) Typical values represent the most likely parametric norm. Bold numbers refer to over temperature limits.
(3) Flat Band Attenuation (Relative To Max Gain) Range Definition: Specified as the attenuation range from maximum which allows gain
flatness specified (either ±0.2dB or ±0.1dB), relative to A_VMAX gain. For example, for f<30MHz, here are the Flat Band Attenuation
ranges:±0.2dB:
10V/V down to 1V/V=20dB range±0.1dB:
10V/V down to 4.7V/V=6.5dB range
(4) Gain Control Frequency Response Schematic:
R_F
910:
+0.2V_DC
+V_IN
R₁
50:
R_G
820:
+
LMH6503
-V_IN
R₂
50:
R_F IN
-2
V_G
C₁
0.01PF
R_T
0V
PORT 1 _50:
DC
R_OUT
50:
PORT 2
R_L
50:
+5V
R_P1
10k:
-5V
(5) Slew Rate is the average of the rising and falling rates.
4
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