ADC12C105EB/NOPB National Semiconductor, ADC12C105EB/NOPB Datasheet

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ADC12C105EB/NOPB

Manufacturer Part Number
ADC12C105EB/NOPB
Description
BOARD EVALUATION FOR ADC12C105
Manufacturer
National Semiconductor
Series
PowerWise®r

Specifications of ADC12C105EB/NOPB

Number Of Adc's
1
Number Of Bits
12
Sampling Rate (per Second)
105M
Data Interface
Parallel
Inputs Per Adc
1 Differential
Input Range
2 Vpp
Power (typ) @ Conditions
400mW @ 105MSPS
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Utilized Ic / Part
ADC12C105
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ADC12C105EB
© 2007 National Semiconductor Corporation
ADC12C105
12-Bit, 95/105 MSPS A/D Converter
General Description
The ADC12C105 is a high-performance CMOS analog-to-
digital converter capable of converting analog input signals
into 12-bit digital words at rates up to 105 Mega Samples Per
Second (MSPS). This converter uses a differential, pipelined
architecture with digital error correction and an on-chip sam-
ple-and-hold circuit to minimize power consumption and the
external component count, while providing excellent dynamic
performance. A unique sample-and-hold stage yields a full-
power bandwidth of 1 GHz. The ADC12C105 may be oper-
ated from a single +3.0V or +3.3V power supply and
consumes low power.
A separate +2.5V supply may be used for the digital output
interface which allows lower power operation with reduced
noise. A power-down feature reduces the power consumption
to very low levels while still allowing fast wake-up time to full
operation. The differential inputs accept a 2V full scale differ-
ential input swing. A stable 1.2V internal voltage reference is
provided, or the ADC12C105 can be operated with an exter-
nal 1.2V reference. Output data format (offset binary versus
2's complement) and duty cycle stabilizer are pin-selectable.
The duty cycle stabilizer maintains performance over a wide
range of clock duty cycles.
The ADC12C105 is available in a 32-lead LLP package and
operates over the industrial temperature range of −40°C to
+85°C.
Connection Diagram
300231
Features
Key Specifications
Applications
1 GHz Full Power Bandwidth
Internal reference and sample-and-hold circuit
Low power consumption
Data Ready output clock
Clock Duty Cycle Stabilizer
Single +3.0V or +3.3V supply operation
Power-down mode
32-pin LLP package, (5x5x0.8mm, 0.5mm pin-pitch)
Resolution
Conversion Rate
SNR (f
SFDR (f
Full Power Bandwidth
Power Consumption
High IF Sampling Receivers
Wireless Base Station Receivers
Test and Measurement Equipment
Communications Instrumentation
Portable Instrumentation
IN
IN
= 240 MHz)
= 240 MHz)
30023101
350 mW (typ), V
400 mW (typ), V
69 dBFS (typ)
82 dBFS (typ)
www.national.com
August 2007
1 GHz (typ)
105 MSPS
A
A
12 Bits
=3.0V
=3.3V

Related parts for ADC12C105EB/NOPB

ADC12C105EB/NOPB Summary of contents

Page 1

... The ADC12C105 is available in a 32-lead LLP package and operates over the industrial temperature range of −40°C to +85°C. Connection Diagram © 2007 National Semiconductor Corporation Features ■ 1 GHz Full Power Bandwidth ■ Internal reference and sample-and-hold circuit ■ ...

Page 2

Block Diagram Ordering Information Industrial (−40°C www.national.com ≤ ≤ T +85°C) A ADC12C105CISQ ADC12C105CISQE 250-Piece Tape and Reel ADC12C105EB 2 Package 32 Pin LLP 32 Pin LLP, Evaluation Board 30023102 ...

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Pin Descriptions and Equivalent Circuits Pin No. Symbol ANALOG I CMO REF 12 OF/DCS DIGITAL I/O 11 CLK 30 PD Equivalent Circuit ...

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Pin No. Symbol 15-19, D0–D11 23-29 21 DRDY 13 ANALOG POWER AGND Exposed Pad DIGITAL POWER DRGND www.national.com Equivalent Circuit Digital data output pins that make ...

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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( Voltage on Any Pin (Not to exceed 4.2V) Input Current at Any Pin other than Supply Pins (Note 4) Package Input Current (Note 4) ...

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Symbol Parameter V Internal Reference bottom RN Ext V External Reference Voltage REF Dynamic Converter Electrical Characteristics Unless otherwise specified, the following specifications apply: AGND = DRGND = 0V, V +1.2V 105 MHz, 50% Duty Cycle, DCS disabled, ...

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Symbol Parameter C Digital Input Capacitance IN DIGITAL OUTPUT CHARACTERISTICS (D0–D13, DRDY) V Logical “1” Output Voltage OUT(1) V Logical “0” Output Voltage OUT(0) +I Output Short Circuit Source Current SC −I Output Short Circuit Sink Current SC C Digital ...

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Dynamic Converter Electrical Characteristics at 95MSPS Unless otherwise specified, the following specifications apply: AGND = DRGND = 0V, V +1.2V MHz, 50% Duty Cycle, DCS disabled, V CLK ≤ ≤ . All other limits apply for T ...

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Note 9: With a full scale differential input of 2V P-P Note 10: Typical figures are 25°C and represent most likely parametric norms at the time of product characterization. The typical specifications are not A guaranteed. Note ...

Page 10

Specification Definitions APERTURE DELAY is the time after the falling edge of the clock to when the input signal is acquired or held for conver- sion. APERTURE JITTER (APERTURE UNCERTAINTY) is the variation in aperture delay from sample to sample. ...

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Timing Diagram Transfer Characteristic FIGURE 1. Output Timing FIGURE 2. Transfer Characteristic 11 30023109 30023110 www.national.com ...

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Typical Performance Characteristics DNL, INL specifications apply: AGND = DRGND = 0V, V DCS disabled MHz CMO IN DNL DNL vs. f DNL vs. Temperature www.national.com = +3.3V +2.5V, ...

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DNL vs 30023149 13 INL vs 30023150 www.national.com ...

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Typical Performance Characteristics AGND = DRGND = 0V +3.3V MHz pF/pin. Typical values are for T CMO IN L SNR, SINAD, SFDR vs. V SNR, SINAD, SFDR vs. ...

Page 15

SNR, SINAD, SFDR vs. Clock Duty Cycle SNR, SINAD, SFDR vs. Clock Duty Cycle, DCS Enabled SNR, SINAD, SFDR vs. f Distortion vs. Clock Duty Cycle 30023157 Distortion vs. Clock Duty Cycle, DCS Enabled 30023159 IN 30023163 15 30023158 30023160 ...

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SNR, SINAD, SFDR vs. Temperature Spectral Response @ 10 MHz Input Spectral Response @ 240 MHz Input www.national.com Distortion vs. Temperature 30023165 Spectral Response @ 70 MHz Input 30023168 Intermodulation Distortion, f 30023170 16 30023166 30023169 1= 19.5 MHz, f ...

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Power vs. f CLK 30023172 17 www.national.com ...

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Functional Description Operating on a single +3.3V supply, the ADC12C105 uses a pipeline architecture and has error correction circuitry to help ensure maximum performance. The differential analog input signal is digitized to 12 bits. The user has the choice of ...

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− V − REF CM REF V − REF CM REF − ...

Page 20

It is important that all grounds associated with the reference voltage and the analog input signal make connection to the ground plane at a ...

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POWER SUPPLY CONSIDERATIONS The power supply pins should be bypassed with a 0.1 µF ca- pacitor and with a 100 pF ceramic chip capacitor close to each power pin. Leadless chip capacitors are preferred because they have low series ...

Page 22

All ground connections should have a low inductance path to ground. 7.0 DYNAMIC PERFORMANCE To achieve the best dynamic performance, the clock source driving the CLK input must have ...

Page 23

Physical Dimensions inches (millimeters) unless otherwise noted 32-Lead LLP Package Ordering Number: ADC12C105CISQ NS Package Number SQA32A 23 www.national.com ...

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... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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