DC1437B-AB Linear Technology, DC1437B-AB Datasheet

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DC1437B-AB

Manufacturer Part Number
DC1437B-AB
Description
BOARD EVAL LTM9003-AB
Manufacturer
Linear Technology
Type
Pre-Distortion Receiver Subsystemr
Datasheets

Specifications of DC1437B-AB

Design Resources
DC1437 Schematic
Frequency
184MHz
Features
LTM9003 12bit Predistortion Receiver Subsystem, LVDS Output
Tool / Board Applications
Wireless Connectivity-ZigBee, RF, Infrared, USB
Mcu Supported Families
LTM9003
Development Tool Type
Hardware - Eval/Demo Board
For Use With/related Products
LTM9003
Lead Free Status / RoHS Status
Not applicable / Not applicable
n
n
n
n
n
n
n
n
n
n
applicaTions
n
n
n
n
Typical applicaTion
FeaTures
Fully Integrated Receiver Subsystem for Digital
Pre-Distortion Applications
Down-Converting Mixer with Wide RF Frequency
Range: 400MHz to 3.8GHz
125MHz Wide Bandpass Filter, <0.5dB Passband
Ripple
Low Power ADC with Up to 12-Bit Resolution,
250Msps Sample Rate
–145.5dBm/Hz Input Noise Floor, 25.6dBm IIP3
1.5W Total Power Consumption
50Ω Single-Ended RF and LO Ports
Internal Bypass Capacitance, No External
Components
ADC Clock Duty Cycle Stabilizer
11.25mm × 15mm LGA package
Transmit Observation Path Receivers
Digital Pre-Distortion (DPD) Receivers
Wideband Receiver
Wideband Instrumentation
RF
PA
LTM9003
LO
3.3V
GND
2.5V
ENC
ENC
9003 TA01
+
OV
DescripTion
The LTM
receiver subsystem for the transmit path of cellular bases-
tations. Utilizing an integrated system in a package (SiP)
technology, it includes a downconverting mixer, wideband
filter and analog-to-digital converter (ADC). The system
is tuned for an intermediate frequency (IF) of 184MHz
and a signal bandwidth of up to 125MHz. The 12-bit ADC
samples at rates up to 250Msps. Contact Linear Technol-
ogy regarding customization.
The high signal level downconverting active mixer is opti-
mized for high linearity, wide dynamic range IF sampling
applications. It includes a differential LO buffer amplifier
driving a double-balanced mixer. Broadband, integrated
transformers on the RF and LO inputs provide single
ended 50Ω interfaces. The RF and LO inputs are internally
matched to 50Ω from 1.1GHz to 1.8GHz.
The CLK input controls converter operation and may be
driven differentially or single-ended. An optional clock duty
cycle stabilizer allows high performance at full speed for
a wide range of clock duty cycles.
L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners. Protected by U.S. Patents including 5481178, 6580258, 6304066, 6127815, 6498466,
6611131.
DGND
12-Bit Digital Pre-Distortion
DD
D11
D0
= 2.5V
LVDS
®
9003 is a 12-bit digital pre-distortion µModule
µModule Receiver
FFT of 4-Channel WCDMA Input at 2.14GHz
–100
–110
–40
–50
–60
–70
–80
–90
154
164
IF FREQUENCY (MHz)
174
Subsystem
184
LTM9003
194
204
9003 TA01b
214

9003f
®

Related parts for DC1437B-AB

DC1437B-AB Summary of contents

Page 1

... L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131 ...

Page 2

LTM9003 absoluTe MaxiMuM raTings (Notes 1, 2) Supply Voltage (V ) CC1 LTM9003-AA ........................................... –0. LTM9003-AB ........................................ –0.3V to 5.5V Supply Voltage (V ) ................................ –03V to 5.5V CC2 Supply Voltage ( ..................... –0.3V to ...

Page 3

T PARAMETER CONDITIONS RF Input Frequency Range LTM9003-AA No External Matching (Midband) With External Matching (Low Band or High Band) LTM9003-AB No External Matching (Midband) With External Matching (Low Band or High ...

Page 4

LTM9003 FilTer characTerisTics range, otherwise specifications are PARAMETER CONDITIONS Center Frequency Lower 3dB Bandedge Upper 3dB Bandedge Lower 20dB Stopband Upper 20dB Stopband Passband Flatness 129MHz to 239.6MHz 174MHz to 194MHz Group Delay Flatness 129MHz to 239.6MHz ...

Page 5

DigiTal inpuTs anD ouTpuTs temperature range, otherwise specifications are at T SYMBOL PARAMETER – + Encode Inputs (ENC , ENC ) V Differential Input Voltage ID V Common Mode Input Voltage ICM R Input Resistance IN R Input Resistance IN(DIFF) ...

Page 6

LTM9003 power requireMenTs range, otherwise specifications are SYMBOL PARAMETER V Mixer Supply Range CC1 V Amplifier Supply Range CC2 V ADC Analog Supply Voltage DD I Mixer Supply Current CC1 I Mixer Shutdown Supply Current CC1(SHDN) I ...

Page 7

TiMing characTerisTics range, otherwise specifications are SYMBOL PARAMETER f Sampling Frequency s t ENC Low Time L t ENC High Time H t Sample-and-Hold Acquisition Delay Time Jitter JITTER t Sample-and-Hold Aperture Delay AP t Output Enable ...

Page 8

LTM9003 TiMing DiagraM ANALOG INPUT – ENC + ENC D0-D11, OF – CLKOUT + CLKOUT  – – – 3 ...

Page 9

Typical perForMance characTerisTics 64k Point FFT, LTM9003- 1950MHz IN –10 –1dBFS SENSE = V –20 DD –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 100 120 FREQUENCY (MHz) 9003 G01 ...

Page 10

LTM9003 Typical perForMance characTerisTics 64k Point FFT, LTM9003- 1950MHz IN –10 –1dBFS SENSE = V –20 DD –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 100 120 FREQUENCY (MHz) 9003 ...

Page 11

FuncTions V (Pins E1, E2, F2): 3.3V (LTM9003-AA CC1 (LTM9003-AB) Supply Voltage for the Mixer. V internally bypassed to GND. V (Pins B1, B2): 3.3V Supply Voltage for the Amplifier. CC2 V is internally bypassed to GND. ...

Page 12

LTM9003 pin FuncTions Pin Configuration J GND LO GND H GND GND GND G RF GND GND F GND V GND CC1 GND CC1 CC1 D GND GND GND C GND GND AMP_EN GND ...

Page 13

... The final result is a fully integrated, accurately tested and optimized solution in the same package. For more details on the semi-custom receiver subsystem program, contact Linear Technology. Down-Converting Mixer The mixer stage consists of a high linearity double-bal- anced mixer, RF buffer amplifier, high speed limiting LO buffer amplifier and bias/enable circuits ...

Page 14

LTM9003 operaTion inputs are both single ended. Low side or high side LO injection can be used. The mixer’s RF input consists of an integrated transformer and a high linearity differential amplifier. The primary terminals of the transformer are connected ...

Page 15

RF Input Port The mixer’s RF input is shown in Figure 4 and is internally matched from 1.1GHz to 1.8GHz, requiring no external components over this frequency range. The input return loss, shown in Figure 5, is typically ...

Page 16

LTM9003 applicaTions inForMaTion Table 1b. RF Input Impedance vs Frequency (LTM9003-AB) FREQUENCY (MHz) INPUT IMPEDANCE 500 19.8 + j7.3 600 22 700 25.7 + j6.6 800 28.8 + j5.9 900 32.3 + j5.1 1000 36.1 + j3.9 1100 ...

Page 17

Table 2b. LO Input Impedance vs Frequency (LTM9003-AB) FREQUENCY (MHz) INPUT IMPEDANCE 500 14.3 – j7.5 600 12.6 – j2.4 700 15.8 + j1.9 800 22.7 + j4.1 900 32.5 + j3.8 1000 44.2 + j1.3 1100 56.3 ...

Page 18

LTM9003 applicaTions inForMaTion LTM9003 MA/COM 0.1µF ETC1-1-13 + • • ENC CLOCK INPUT 8.2pF 100 V DD 0.1µF ENC – Figure 8. Transformer Driven ENC + ENC V = 1.5V THRESHOLD – 1.5V ENC 0.1µF Figure 9. ...

Page 19

The lowest phase noise oscillators have single-ended sinusoidal outputs, and for these devices the use of a filter close to the ADC may be beneficial. This filter should be close to the ADC to both reduce roundtrip reflection ...

Page 20

LTM9003 applicaTions inForMaTion termination resistor, even if the signal is not used (such as + – + – OF /OF or CLKOUT /CLKOUT ). To minimize noise the PC board traces for each LVDS output pair should be routed close ...

Page 21

Grounding and Bypassing The LTM9003 requires a printed circuit board with a clean unbroken ground plane; a multilayer board with an internal ground plane is recommended. The pinout of the LTM9003 has been optimized for a flow-through layout ...

Page 22

LTM9003 applicaTions inForMaTion Figure 12. Layer 1 Component Side Figure 14. Layer 3  Figure 13. Layer 2 Figure 15. Backside 9003f ...

Page 23

... DescripTion Z Z Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. bbb // 6.985 5.715 4 ...

Page 24

... IIP3 at 1.9GHz 12.5dB, Single-Ended RF and LO Ports 24.7dBm IIP3 at 1.9GHz 11.7dB, Single-Ended RF and LO Ports, 3.3V Supply 16-Bit, 130Msps ADC, 20dB Gain Amplifier, Anti-Alias Filter, Internal Bypass Capacitance for Gain Adjustment, Internal Bypass Capacitance www.linear.com ● 9003f LT 0910 • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 2010 ...

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