MAX5886EGK-D+ [MAXIM]
Quick Dynamic Performance Evaluation;
| 型号： | MAX5886EGK-D+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Quick Dynamic Performance Evaluation |
| 文件： | 总10页 (文件大小：761K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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Evaluate: MAX5886/MAX5887/MAX5888
MAX5886/MAX5887/MAX5888
Evaluation Kits
General Description
Features
● Quick Dynamic Performance Evaluation
● LVDS-Compatible Data Inputs
● SMA Coaxial Connectors for Clock Input and
Analog Output
● 50Ω Matched Clock Input and Analog Output
Signal Lines
The MAX5886/MAX5887/MAX5888 evaluation kits
(EV kits) are fully assembled and tested circuit boards
that contain all the components necessary to evaluate
the performance of the MAX5886 (12-bit), MAX5887
(14-bit), and MAX5888 (16-bit), 500Msps, current-output,
digital-to-analog converters (DACs). Each EV kit requires
low-voltage differential-signaling (LVDS)-compatible data
inputs, a single-ended clock input, and 3.3V power
supplies for simple board operation.
● Single-Ended to Differential Clock-Signal
Conversion Circuitry
● Differential Current Output to Single-Ended
Voltage Signal Output Conversion Circuitry
● Full-Scale Current Output Configured for 20mA
● External 1.25V Reference Source Available
● Fully Assembled and Tested
Part Selection Table
Ordering Information
PART
RESOLUTION (BITS) SPEED (Msps)
PART
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
IC PACKAGE
68 QFN-EP**
68 QFN-EP**
68 QFN-EP**
MAX5886EGK-D+
MAX5887EGK-D+
MAX5888EGK-D+
12
14
16
500
500
500
MAX5886EVKIT#
MAX5887EVKIT#
MAX5888EVKIT#
+Denotes lead-free package.
D = Dry pack.
*EV kit PC board temperature range only.
**EP = Exposed paddle.
#Denotes ROHS compliant with exemption.
Common Component List
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
Not installed, resistors (0603)
C1
0
Not installed, ceramic capacitor (0603)
R6, R8, R9
R7
0
1
2
2
2
2kΩ ±1% resistor (0603)
0.1μF ±10%, 10V X5R ceramic
capacitors (0402)
TDK C1005X5R1A104KT or
Taiyo Yuden LMK105BJ104KV
R10, R11
R12, R13
CLK, OUT
24.9Ω ±1% resistors (0402)
0Ω ±5% resistors (0402)
C2–C15
14
SMA PC-mount vertical connectors
C16, C28
0
3
Not installed, ceramic capacitor (0805)
Not installed, scope probe connectors
Tektronix 131-4244-00
OUTP, OUTN
T1, T3
0
2
1
47μF ±10%, 6.3V tantalum capacitors (B)
AVX TAJB476K006R or
Kemet T494B476K006AS
C17, C20, C23
Transformers
Mini-Circuits ADTL1-12
10μF ±10%, 10V tantalum capacitors (A)
AVX TAJA106K010R or
Kemet T494A106K010AS
1:1 balun transformer
Coilcraft TTWB3010-1L
C18, C21, C24,
C26
T2
4
4
TP1, TP2, TP3
3
1
1
PC test points, black
1μF ±10%, 10V X5R ceramic
capacitors (0603)
TDK C1608X5R1A105KT
TP4
PC test point, red
C19, C22, C25,
C27
U1
See the EV Kit Specific Component List
1.25V voltage reference (8-pin SO)
Maxim MAX6161AESA or
MAX6161BESA
J1, J2
JU1–JU5
JU6
2
5
0
2 x 20-pin surface-mount headers (0.1in)
2-pin headers
U2
1
Not installed
—
—
5
1
Shunts (JU1–JU5)
Ferrite bead cores (4532)
Würth Elektronik 74279226101
L1–L4
4
MAX5886/MAX5887/MAX5888 EV kit
PC board
R1–R4
R5
4
1
100Ω ±0.1% resistors (0603)
100Ω ±1% resistor (0603)
19-0581; Rev 1; 1/21
Evaluate: MAX5886/MAX5887/MAX5888
MAX5886/MAX5887/MAX5888
Evaluation Kits
EV Kit Specific Component List
Component Suppliers
DESIGNATION DESIGNATION
DESCRIPTION
SUPPLIER
AVX
PHONE
WEBSITE
843-946-0238 www.avxcorp.com
847-639-6400 www.coilcraft.com
864-963-6300 www.kemet.com
718-934-4500 www.minicircuits.com
714-373-7366 www.panasonic.com
800-348-2496 www.t-yuden.com
847-803-6100 www.component.tdk.com
MAX5886EGK-D
(68 QFN-EP 10mm x
10mm x 0.9mm)
MAX5886EVKIT
Coilcraft
Kemet
MAX5887EGK-D
(68 QFN-EP 10mm x
10mm x 0.9mm)
Mini-Circuits
Panasonic
Taiyo Yuden
TDK
MAX5887EVKIT
MAX5888EVKIT
U1
MAX5888EGK-D
(68 QFN-EP 10mm x
10mm x 0.9mm)
Würth Elektronik
+49 7942 945
www.we-online.com
Note: Indicate that you are using the MAX5886/MAX5887/MAX5888
when contacting these component suppliers.
7) Connect the digital pattern generator output to the
input header connectors J1 and J2 on the EV kit
board. The input header pins are labeled for proper
connection with the digital pattern generator (i.e.,
connect the positive rail of bit 0 to the header pin
labeled B0P and complementary negative rail to the
header pin labeled B0N, etc.).
Quick Start
Recommended Equipment
● Three 3.3VDC, 1A power supplies
● RF signal generator with low phase noise and low
jitter for clock input (e.g., HP/Agilent 8644B)
● 12-bit (MAX5886EVKIT), 14-bit (MAX5887EVKIT), or
16-bit (MAX5888EVKIT) digital pattern generator for
LVDS data inputs (e.g., Agilent 81250)
8) Connect the spectrum analyzer to the OUT SMA
connector.
9) Connect the ground terminal of a 3.3V power supply
to GND_CK. Next, connect the positive terminal of
this supply to VDD_CK.
● Spectrum analyzer (e.g., Rohde & Schwartz FSU)
● Voltmeter
These EV kits are fully assembled and tested surface-
mount boards. Follow the steps below for board operation.
Do not enable signal generators until all connections
are completed:
10) Connect the ground terminal of a 3.3V power supply
to DGND. Next, connect the positive terminal of this
supply to DVDD.
11) Connect the ground terminal of a 3.3V power supply
to AGND. Next, connect the positive terminal of this
supply to AVDD.
1) Verify that no shunts are installed across jumpers
JU1, JU2 (DAC uses the 1.2V internal voltage refer-
ence), and JU3 (DAC in normal operation mode).
12) Turn on the three power supplies.
2) Verify that a shunt is installed across jumper JU4.
3) Verify that no shunt is installed across jumper JU5.
13) With a voltmeter, verify that 1.2V is measured at the
VREF PC board pad on the EV kit.
4) Synchronize the digital pattern generator (Agilent
81250) to the clock signal generator (HP/Agilent
8644B).
14) Enable the clock signal generator and the digital
pattern generator. Set the clock signal generator
output power to +10dBm and the frequency (f
less than or equal to 500MHz.
) to
CLK
5) Connect the clock signal generator to the CLK SMA
connectors on the EV kit.
15) Use the spectrum analyzer to view the EV kit
output spectrum or view the output waveform using an
oscilloscope.
6) Verify that the digital pattern generator is programmed
for LVDS outputs.
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Evaluation Kits
Clock Signal
Detailed Description
The DAC requires a differential clock input signal with
minimal jitter. The EV kit circuit provides single-ended to
differential conversion circuitry. The user must supply a
single-ended clock signal at the CLK SMA connector.
The MAX5886/MAX5887/MAX5888 EV kits are designed
to simplify the evaluation of the MAX5886 (12-bit),
MAX5887 (14-bit), or MAX5888 (16-bit), 500Msps,
current-output DACs. The DACs require LVDS-compatible
data inputs, differential clock input signals, a 1.2V
reference voltage, and 3.3V power supplies for simple
board operation.
The clock signal can be either a sine wave or a square
wave. For a sine wave, 2V
(+10dBm) amplitude is
P-P
recommended and for a square wave greater than a
0.5V signal is recommended.
The EV kits provide header connectors to easily inter-
face with an LVDS pattern generator, circuitry to convert
the differential current outputs to a single-ended voltage
signal, and circuitry to convert a user-supplied single-
ended clock signal to a differential clock signal required
by the DAC. The EV kit circuit includes different options
for supplying a reference voltage to the DAC. The EV
kit circuit can operate with a single 3.3V power supply,
but also supports the use of three separate 3.3V power
supplies by dividing the circuit grounds into digital,
analog, and digital clock ground planes that improve
dynamic performance. The three ground planes are
connected together on the back of the PC board.
P-P
Reference Voltage Options
The DAC requires a reference voltage to set the full-scale
analog signal voltage output. The EV kit features three
ways to provide a reference voltage to the DAC: internal,
on-board external, and user-supplied external reference.
Verify that no shunt is connected across jumper JU1 to
use the internal 1.2V bandgap reference. The reference
voltage can be measured at the VREF pad on the EV kit.
The internal reference can be overdriven by an external
reference to enhance accuracy and drift performance or
for gain control. The EV kit circuit is designed with an
on-board 1.25V temperature-stable external voltage refer-
ence source U2 (MAX6161) that can be used to overdrive
the internal reference provided by the DAC. Install shunts
across jumpers JU1 and JU2 to use the on-board external
reference. The user can also supply an external voltage
reference in the range of 0.125V to 1.25V by connecting a
voltage source to the VREF pad and removing the shunts
across jumpers JU1 and JU2. See Table 1 to configure
the shunts across jumpers JU1 and JU2 and select the
source of the reference voltage.
Power Supplies
The EV kits can operate from a single 3.3V power supply
connected to the VDD_CK, DVDD, AVDD input power
pads and their respective ground pads for simple board
operation. However, three separate 3.3V power supplies
are recommended for optimum dynamic performance.
The EV kit PC board layout is divided into three sections:
digital, analog, and clock. Using separate power supplies
for each section reduces crosstalk and improves the
output signal integrity. When using separate power sup-
plies, connect each power supply across the DVDD and
DGND PC board pads (digital), across the VDD_CK and
GND_CK PC board pads (clock), and across the AVDD
and AGND PC board pads (analog) on the EV kit.
Table 1. Reference Voltage Selection
JU1 AND JU2
VOLTAGE REFERENCE MODE
SHUNT POSITIONS
LVDS Input Data
External 1.25V reference (U2)
Installed
connected to REFIO pin
These EV kits provide two 0.1in 2 x 20 header connectors
(J1 and J2) to allow interface of a 12-bit, 14-bit, or 16-bit
LVDS pattern generator. The header data pins are labeled
on the board with the appropriate data bit designation.
Use the labels on the EV kit to match the data bits from
the LVDS pattern generator to the corresponding data
pins on J1 and J2. The positive rail of a bit is labeled
BxP (positive) and the complementary rail is labeled BxN
(negative) where x is the bit number.
Not installed
Not installed
DAC internal 1.2V bandgap reference
User-supplied voltage reference at the
VREF pad (0.125V to 1.25V)
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Evaluation Kits
Table 2. Power-Down (Jumper JU3)
Table 3. Segment-Shuffling Mode
(Jumper JU5)
SHUNT
Installed
FUNCTION
Power-down mode
Normal operation
SEGMENT-SHUFFLING
SHUNT
SEL0 PIN
MODE
Not installed
Connected to
DVDD
Installed
Enabled
Full-Scale Output Current
The DAC requires an external resistor to set the full-scale
output current. The EV kit full-scale current is set to 20mA
with resistor R7. Replace resistor R7 to adjust the full-
scale output current. Refer to the Reference Architecture
and Operation section in the DAC data sheet to select
different values for R7.
Connected to
DGND through an
internal pulldown
resistor
Not installed
Disabled
Segment Shuffling
Analog Output
The DAC complementary current outputs are terminated
into 50Ω resistance to generate differential voltage signals
with amplitudes of 1V
The segment-shuffling function on the DAC can improve
the high-frequency spurious-free dynamic range (SFDR)
at the cost of an increase in the DAC’s noise floor. The EV
kits provide jumper JU5, which allows the user to enable
or disable this function. See Table 3 to configure jumper
JU5.
differential. The positive and
P-P
negative rails of the differential signal can be sampled at
the OUTP and OUTN probe pads. The differential signal
is converted into a 50Ω singled-ended signal with balun
transformer T2 and can be sampled at the OUT SMA con-
nector. A shunt on jumper JU4 connects the center tap
of transformer T2 to AGND, thus enhancing the dynamic
performance of the DAC. The single-ended output signal
after the transformer generates a -3dBm full-scale output
power when terminated into 50Ω. A shunt on jumper
JU4 should always be installed for optimum dynamic
performance.
Board Layout
The EV kit boards are a four-layer board design opti-
mized for high-speed signals. All high-speed signal
lines are routed through 50Ω impedance-matched
transmission lines. The length of these 50Ω transmis-
sion lines is matched to within 40 mils (1mm) to minimize
layout-dependent data skew. The board layout separates
the analog, digital, and digital clock sections of the circuit
for optimum performance.
Power-Down
The DAC can be powered down or powered up by config-
uring jumper JU3. In power-down mode, the total power
dissipation of the DAC is reduced to less than 1mW. See
Table 2 for jumper JU3 configuration.
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B 6 P
B 6 N
B 5 P
B 5 N
B 4 P
N . C .
A G N D
D D
V A
A G N D
D D
V A
D D
V A
J 1 - 3 2 J 1 - 9
J 1 - 3 4 J 1 - 7
J 1 - 3 6 J 1 - 5
B 4 N
B 3 P
B 3 N
A G N D
I O U T P
I O U T N
A G N D
D G N D
D D
D V
D D
V A
D G N D
J 1 - 3 8 J 1 - 3
J 1 - 4 0 J 1 - 1
B 2 P
N . C .
B 2 N
B 1 P
B 1 N
B 0 P
B 0 N
D A C R E F
F S A D J
R E F I O
A G N D
D D
V A
Figure 1. MAX5886 EV Kit Schematic
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B 8 P
B 8 N
B 7 P
B 7 N
B 6 P
N . C .
A G N D
D D
V A
A G N D
D D
V A
D D
V A
J 1 - 3 2 J 1 - 9
J 1 - 3 4 J 1 - 7
J 1 - 3 6 J 1 - 5
B 6 N
B 5 P
B 5 N
A G N D
I O U T P
I O U T N
A G N D
D G N D
D D
D V
D D
V A
D G N D
J 1 - 3 8 J 1 - 3
J 1 - 4 0 J 1 - 1
B 4 P
N . C .
B 4 N
B 3 P
B 3 N
B 2 P
B 2 N
D A C R E F
F S A D J
R E F I O
A G N D
D D
V A
Figure 2. MAX5887 EV Kit Schematic
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5 2
B 1 0 P
N . C .
5 3
B 1 0 N
A G N D
5 4
D D
V A
B 9 P
5 5
B 9 N
A G N D
5 6
D D
V A
B 8 P
5 7
D D
V A
J 1 - 3 2 J 1 - 9
J 1 - 3 4 J 1 - 7
J 1 - 3 6 J 1 - 5
B 8 N
B 7 P
B 7 N
5 8
5 9
6 0
A G N D
I O U T P
I O U T N
A G N D
D G N D
6 1
6 2
6 3
6 4
6 5
6 6
6 7
6 8
D D
D V
D D
V A
D G N D
J 1 - 3 8 J 1 - 3
J 1 - 4 0 J 1 - 1
B 6 P
N . C .
B 6 N
B 5 P
B 5 N
B 4 P
B 4 N
D A C R E F
F S A D J
R E F I O
A G N D
D D
V A
Figure 3. MAX5888 EV Kit Schematic
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1.0”
1.0”
Figure 4. MAX5886/MAX5887/MAX5888 EV Kit Component
Placement Guide—Component Side
Figure 5. MAX5886/MAX5887/MAX5888 EV Kit PC Board
Layout—Component Side
1.0”
1.0”
Figure 6. MAX5886/MAX5887/MAX5888 EV Kit PC Board
Layout—Ground Planes
Figure 7. MAX5886/MAX5887/MAX5888 EV Kit PC Board
Layout—Power Planes
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1.0”
1.0”
Figure 8. MAX5886/MAX5887/MAX5888 EV Kit PC Board
Layout—Solder Side
Figure 9. MAX5886/MAX5887/MAX5888 EV Kit Component
Placement Guide—Solder Side
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Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
6/06
Intial Release
—
Updated MAX5886, MAX5887, and MAX5888 to ROHS compliance with
exemption in Ordering Information Table, Updated Common Component List and
Component Supplier Tables
1
1/21
1-2
For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time.
©
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2021 Maxim Integrated Products, Inc.
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