DC1241B-BA Linear Technology, DC1241B-BA Datasheet

DC1241B-BA

Manufacturer Part Number

DC1241B-BA

Description

BOARD EVAL LTM9001-BA

Manufacturer

Linear Technology

Type

Baseband Receiverr

Datasheets

1.DC1241B-AA.pdf (30 pages)

2.DC1241B-AA.pdf (4 pages)

Specifications of DC1241B-BA

Design Resources

DC1241B Schematic

Frequency

0Hz ~ 300MHz

Features

LTM9001 16bit Receiver Subsystem, DC-300MHz LPF

Tool / Board Applications

Wireless Connectivity-ZigBee, RF, Infrared, USB

Mcu Supported Families

LTM9001

Development Tool Type

Hardware - Eval/Demo Board

For Use With/related Products

LTM9001

Lead Free Status / RoHS Status

Not applicable / Not applicable

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DESCRIPTION

Demonstration circuit 1241 is an evaluation board

featuring

LTM9001 16-bit Receiver Subsystem. DC1241

demonstrates good circuit layout techniques and

recommended external circuitry for optimal system

performance.

DC1241 comes installed with one of Linear Tech-

nology’s 16-bit LTM9001 amplifier/ADC subsys-

tems. The board includes a wideband input trans-

former (for evaluation with a single-ended RF sig-

nal generator) and output LVDS buffers. The

LTM9001 is also capable of generating CMOS

QUICK START PROCEDURE

Validating the performance of the LTM9001 is sim-

ple with DC1241, and requires only an input

source, a clock source, a computer, and a lab

power supply. Refer to Figure 1 for proper board

evaluation equipment setup and follow the proce-

dure below:

1. Connect the power supply as shown in Figure 1.

2. Provide an encode clock to the ADC via SMA

There are on-board low-noise voltage regulators

that provide the three supply voltages for the

LTM9001. The entire board and all components

share a common ground. The power supply

should still be a low-noise lab power supply ca-

pable of supplying at least 1 Amp.

connector J3. Use a low-phase-noise clock

source such as a filtered RF signal generator or

a high-quality clock oscillator. Obtain DC1216

for a low-phase-noise ADC clock source that

can plug directly into DC1241.

NOTE. Similar to having a noisy input, a high-jitter (phase noise)

encode clock will degrade the signal-to-noise ratio (SNR) of the

system.

Linear

Technology

16-BIT HIGH PERFORMANCE ADC DRIVERS

Corporation’s

outputs – for evaluation of the part with CMOS

outputs, obtain DC1250. DC1241 plugs into the

DC890 Data Acquisition demo board and the out-

put can be easily analyzed with Linear Technol-

ogy’s PScope data processing software, which is

available for no charge on our website at

http://www.linear.com.

Design files for this circuit board are available.

Call the LTC factory.

Table 1: DC1241 Connectors and Jumpers

3. Apply an input signal to the board. DC1241 al-

, LTC and LT are registered trademarks of Linear Technology Corporation.

lows great flexibility in applying input signals

REFERENCE

J1 (AIN-)

J2 (AIN+)

J3 (ENC)

E3 (EXT REF)

JP1 (AMP_EN)

JP2

(PGA_GAIN)

JP3 (RAND)

JP4

(ADC_SHDN)

JP5 (DITH)

LTM9001 16-bit Re-

DEMO CIRCUIT 1241

QUICK START GUIDE

ceiver Subsystem

FUNCTION

Differential Board Input. Normally not

connected. See text for differential-input

evaluation methods.

Board Signal Input. Impedance-matched

to 50Ω for use with lab signal generators.

Board Clock Input. Impedance-matched

to 50Ω. Drive with a low-phase-noise

clock oscillator or filtered sine wave signal

source.

Reference input to adjust the full-scale

range of the LTM9001. Connects to the

SENSE pin; by default, tied to VDD for

internal reference.

Enables the LTM9001 amplifier. Default is

EN.

Selects the input range of LTM9001. De-

fault is LOW (low PGA gain, larger input

range)

Output Randomizer. NORM is default.

Enables the LTM9001 ADC. Default is

NORM.

ADC Internal Dither. Default is OFF.

Related parts for DC1241B-BA

DC1241B-BA Summary of contents

Page 1

... PScope data processing software, which is available for no charge on our website at http://www.linear.com. Design files for this circuit board are available. Call the LTC factory. , LTC and LT are registered trademarks of Linear Technology Corporation. Table 1: DC1241 Connectors and Jumpers REFERENCE J1 (AIN-) J2 (AIN+) ...

Page 2

... AC-coupled or DC-coupled. Table 2 shows 2 4. Observe the ADC output with demo circuit DC890, a USB cable, a Windows computer, and Linear Technology’s Pscope data processing software. Note that DC890 will also require an external +6V/1A power supply when receiving LVDS Power Supply (3 ...

Page 3

... PScope software to identify the board and apply the correct settings for the data collection. USING PSCOPE SOFTWARE PScope, downloadable from Linear Technology’s website http://www.linear.com/, processes data from the DC890 FastDAACS board and displays FFT and signal analysis information on the com- puter screen ...

Page 4

LTM9001 16-BIT RECEIVER SUBSYSTEM 100 40 R 100 39 R 100 38 R 100 37 R 100 36 R 100 35 R A14 D A15 0VD G9 D 0VD ...

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