AD8337-EVALZ-INV Analog Devices Inc, AD8337-EVALZ-INV Datasheet - Page 24

• Manufacturer Part Number: AD8337-EVALZ-INV
• Description: RoHS Compliant Eval Board.
• Manufacturer: Analog Devices Inc
• Series: X-AMP®r

Specifications of AD8337-EVALZ-INV

• Channels Per Ic: 1 - Single
• Amplifier Type: Voltage Feedback
• Output Type: Single-Ended
• Slew Rate: 625 V/µs
• -3db Bandwidth: 280MHz
• Operating Temperature: -40°C ~ 85°C
• Current - Supply (main Ic): 18.5mA
• Voltage - Supply, Single/dual (±): ±2.5 V ~ 5 V
• Board Type: Fully Populated
• Utilized Ic / Part: AD8337
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output / Channel: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD8337
IN
100Ω
IN
J1
VOUT
Figure 80. Schematic—AD8337-EVALZ - Noninverting Configuration
Figure 81. Schematic—AD8337-EVALZ-INV Inverting Configuration
VOUT
100Ω
TP1
R5
49.9Ω
100Ω
0Ω
R4
J1
TP1
R5
49.9Ω
RVO1
453Ω
RVO3
R2
R4
0Ω
0Ω
RVO1
453Ω
RVO3
R2
0Ω
GND1
1
2
3
4
R
100Ω
GND1
FB1
1
2
3
4
R
100Ω
VOUT
VCOM
INPP
INPN
FB1
VOUT
VCOM
INPP
INPN
GND2
GND
AD8337
R
100Ω
FB2
GND2
GND
AD8337
DO NOT INSTALL PARTS IN GRAY
ADR391AUJZ-R2
DO NOT INSTALL PARTS IN GRAY
R
100Ω
U1
FB2
GND1
VIN
2
U1
VNEG
PRAO
GND3
VPOS
GAIN
GND
U2
VNEG
PRAO
GND3
VPOS
GAIN
SHDN
VOUT
GND2 GND3 GND4
5
1
8
7
6
5
GND4
8
7
6
5
3
4
GND4
10µF
C4
0.1µF
C3
0.1µF
C10
0.1µF
C1
10µF
C9
0.1µF
C4
0.1µF
CG
1nF
C3
0.1µF
120nH
C1
+
CG
1nF
120nH
Figure 82. Evaluation Board Schematic—Single-Supply Version
+
AD8541AR
L2
RPO2
0.1µF
453Ω
+V
L2
RPO2
453Ω
R1
49.9Ω
C4
+V
S
+V
3
2
R1
49.9Ω
S
0.22µF
S
U3
GAIN
C8
GAIN
7
4
–V
PRAO
C7
0.1µF
6
–V
PRAO
+
S
L1
120nH
IN
S
L1
120nH
10kΩ
+
C1
10µF
10V
100Ω
Rev. C | Page 24 of 32
R4
R6
C2
10µF
0.1µF
+
C6
49.9Ω
C2
10µF
120nH FB
R1
L1
1µF
16V
C2
3
100Ω
R
+
FB1
INPP
INPN
CIRCUIT OPTIONS
Part numbers for fully assembled boards are listed in Table 4.
Table 4. AD8337 Evaluation Board Variations
Part Number
AD8337-EVALZ
AD8337-EVALZ-INV
AD8337-EVALZ-SS
Figure 80, Figure 81, and Figure 82 are schematics for the
various circuit configurations. Within limits, the AD8337
preamplifier gain is controlled by Resistor R
R
preamplifier, see the Theory of Operation section.
OUTPUT PROTECTION
The AD8337 VGA output stage is specified for driving loads of
500 Ω or greater. To protect the stage from an accidental
overload, a 453 Ω resistor is provided, which when connected to
50 Ω test equipment inputs, enables safe operation. In certain
high load impedance situations, the value of this resistor can be
reduced. However, if load capacitance values greater than
approximately 20 pF are anticipated, such as a BNC cable, the
minimum series resistor value is not to be less than 20 Ω.
An alternate test pin is also provided for direct access to the
output of the AD8337 VGA. The pin is typically used for a
probe, and a 0 Ω resistor is provided between the test loop and
the output pin. If the test loop is connected to loads ≤500 Ω,
then the 0 Ω resistor is to be changed to an appropriate value.
4
VPOS
FB2
8
. For simple guidelines applying to the current-feedback
100Ω
R
FB2
PRAO
AD8337
5
C5
0.1µF
U1
VCOM
2
C3
0.1µF
VNEG
VOUT
GAIN
6
1
Configuration
Dual-supply noninverting
Dual-supply inverting
Single-supply noninverting
7
RVO1
453Ω
CG
1nF
VOUT
GAIN
FB1
and Resistor