ANALOG DEVICES UG-377 Service Manual
Evaluation Board User Guide
E
UG-377
One Technology Way • P. O . Box 9106 • Norwood, MA 02062-9106, U.S.A . • Te l: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Evaluation Board for the ADA4830-1, High Speed Difference Amplifier
Offered in 8-Lead LFCSP
FEATURES
Enables quick breadboarding/prototyping
Edge-mounted SMA connector provisions
Easy connection to test equipment and other circuits
GENERAL DESCRIPTION
The ADA4830-1BCP-EBZ evaluation board makes it easy for
designers to quickly observe the performance of the ADA4830-1
difference amplifier in real-world applications. Input signals are
applied through SMA jacks (INP, INN), and the output is taken
from SMA Jack VOUT. Power is applied through the red +VS
pin. The black GND pin should be grounded.
The ADA4830-1BCP-EBZ inputs can be driven by either a
balanced (differential) or unbalanced (single-ended) source. For
unbalanced signals, connect the unused input (INN) to ground
at the signal source. The evaluation board is shipped with a
75 Ω differential input termination at R5. The ADA4830-1BCP-
EBZ board is configured with a 75 Ω series resistor, R6,
installed at the output. This can be changed to match the actual
load impedance. The VREF pin at the upper left of the board
can be used to set the output bias voltage. It is internally biased
to +VS/2 when this pin is floating. Resistors R1 and R2 are
provided as an option to force a new bias level at VREF.
The ADA4830-1 can be powered down (disabled) by grounding
the ENA pin at the top right of the evaluation board. On the
evaluation board, this pin can be pulled up to +VS through
Resistor R3 or left floating for normal operation.
In normal operation, the open-drain short-to-battery output
flag (STB) is held at a logic high, connected to +VS through
Resistor R8. During a short-to-battery condition (9.5 V to 18 V
on either input), it is driven to a logic low state. The STB pin
(lower right of the evaluation board) can be used to monitor the
short-to-battery indicator function.
Figure 1 shows the bare evaluation board, component side and
circuit side. Figure 2 shows the evaluation board schematic. The
PCB layout pattern for the PCB is shown in Figure 3 and Figure 4.
NOTES
1. THE
VALUATION BOARD SIL K SCRE E N PART NUMBER LA BELING ON Y O UR BO AR D MAY BE DIFF E R ENT
FROM WHAT IS SHOWN HERE.
Figure 1. ADA4830-1BCP-EBZ Component Side (Primary) and Circuit Side (Secondary) of PCB
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
DIGITAL PICTURE OF EVALUATION BOARD
Rev. 0 | Page 1 of 8
SECONDARY SIDEPRIMARY SIDE
10543-001
UG-377 Evaluation Board User Guide
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Digital Picture of Evaluation Board ............................................... 1
Revision History ............................................................................... 2
REVISION HISTORY
2/12—Revision 0: Initial Version
Evaluation Board Schematic and Artwork .....................................3
Ordering Information .......................................................................5
Bill of Materials ..............................................................................5
Rev. 0 | Page 2 of 8
Evaluation Board User Guide UG-377
10543-002
R7
R4
C2
R3
R8
R6
5 4 3 2
1
VOUT
1
ENA
1
STB
1
GND
1
+VS1
VREF
R1
5432
1
INN
5432
1
INP
R2
R9
R10
R5
C6
C4
C1
C3
4
1
685
PAD
2
3
7
U1
TBD1210
DNI
DNI
+VS
JOHNSON142-0701-851
TBD0603
TBD0805
JOHNSON142-0701-851
ADA4830-1
0
GRN
+VS
DNI
YEL
75
+VS
4.75K
BLK
0.1UF
4.7UFTBD0805
DNI
75
0
TBD0603
BLU
RED
TBD0805
DNI
DNI
TBD1210
JOHNSON142-0701-851
DNI
10UF
PAD
VDD
ENA
VOUT
STBVSS
INN
INP
VREF
EVALUATION BOARD SCHEMATIC AND ARTWORK
Figure 2. ADA4830-1BCP-EBZ Board
Rev. 0 | Page 3 of 8
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