REV. D
AD8004
–12–
Table I. Recommended Component Values
1
and Typical Bandwidths
Alternate Alternate Alternate Alternate
Gain –10 –2 –2 –1 –1 +1 +1 +2 +2 +10
AD8004 (SOIC)
PACKAGE TYPE
R
F
(Ω) 499 698 499 750 499 1.10 k 698 1.10 k 604 499
R
G
(Ω) 49.9 348 249 750 499 1.10 k 604 54.9
R
T
2
(Ω) None 57.6 61.9 53.6 54.9 50 50 50 50 50
Small Signal BW
@ ±5 V
S
(MHz) 155 130 190 125 195 150 225 110 175 135
Peaking @ ±5 V
S
< 0.7 dB < 0.1 dB 0.5 dB None 0.4 dB 1.3 dB 1.8 dB < 0.1 dB 0.5 dB < 0.2 dB
0.1 dB Flatness
@ ±5 V
S
(MHz) 35 25 30
Small Signal BW
@ +5 V
S
(MHz) 135 115 175 110 165 130 195 95 155 120
NOTES
1
Resistor values listed are standard 1% tolerance.
2
R
T
chosen for 50 Ω characteristic input impedance.
The PCB should have a ground plane covering all unused portions
of the component side of the board to provide a low impedance
ground path. The ground plane should be removed from the
area near the input pins to reduce stray capacitance.
Chip capacitors should be used for supply bypassing (see
Figure 13). One end should be connected to the ground plane and
the other within 1/8" of each power pin. An additional (4.7 µF to
10 µF) tantalum electrolytic capacitor should be connected in
parallel.
The feedback resistor should be located close to the inverting
input pin in order to keep the stray capacitance at this node to a
minimum. Capacitance greater than 1 pF at the inverting input
will significantly affect high speed performance when operating
at low noninverting gains. An example of extra inverting input
capacitance can be seen on the plot of Figure 10.
Stripline design techniques should be used for long signal traces
(greater than about 1"). These should be designed with the
proper system characteristic impedance and be properly termi-
nated at each end.
NONINVERTING CONFIGURATION
C1
0.1F
C2
0.1F
C4
10F
C3
10F
R
T
V
IN
V
OUT
+V
S
–V
S
R
G
R
F
R
BT
, 50
1/4
C1
0.1F
C2
0.1F
C4
10F
C3
10F
R
T
V
IN
V
OUT
+V
S
–V
S
R
G
R
F
R
BT
, 50
1/4
INVERTING CONFIGURATION
Figure 13. Inverting and Noninverting Configurations
