adc08d1010diyb National Semiconductor Corporation, adc08d1010diyb Datasheet

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adc08d1010diyb

Manufacturer Part Number
adc08d1010diyb
Description
High Performance, Low Power, Dual 8-bit, 1 Gsps A/d Converter
Manufacturer
National Semiconductor Corporation
Datasheet
© 2008 National Semiconductor Corporation
ADC08D1010
High Performance, Low Power, Dual 8-Bit, 1 GSPS A/D
Converter
General Description
The ADC08D1010 is a dual, low power, high performance
CMOS analog-to-digital converter that digitizes signals to 8
bits resolution at sampling rates up to 1.0 GSPS. Consuming
a typical 1.6 Watts at 1 GSPS from a single 1.9 Volt supply,
this device is guaranteed to have no missing codes over the
full operating temperature range. The unique folding and in-
terpolating architecture, the fully differential comparator de-
sign, the innovative design of the internal sample-and-hold
amplifier and the self-calibration scheme enable a very flat
response of all dynamic parameters beyond Nyquist, produc-
ing 6.9 ENOB with a 500 MHz input signal and a 1 GHz
sample rate while providing a 10
is offset binary and the LVDS digital outputs are compliant
with IEEE 1596.3-1996, with the exception of an adjustable
common mode voltage between 0.8V and 1.2V.
Each converter has a 1:2 demultiplexer that feeds two LVDS
buses and reduces the output data rate on each bus to half
the sampling rate. The two converters can be interleaved and
used as a single 2 GSPS ADC.
The converter typically consumes less than 3.5 mW in the
Power Down Mode and is available in a 128-lead, thermally
enhanced exposed pad LQFP and operates over the Indus-
trial (-40°C
T
A
+85°C) temperature range.
-15
B.E.R. Output formatting
201467
Features
Key Specifications
Applications
Internal Sample-and-Hold
Single +1.9V ±0.1V Operation
Choice of SDR or DDR output clocking
Interleave Mode for 2x Sampling Rate
Multiple ADC Synchronization Capability
Guaranteed No Missing Codes
Serial Interface for Extended Control
Fine Adjustment of Input Full-Scale Range and Offset
Duty Cycle Corrected Sample Clock
Resolution
Max Conversion Rate
Bit Error Rate
ENOB @ 500 MHz Input
DNL
Power Consumption
— Operating
— Power Down Mode
Direct RF Down Conversion
Digital Oscilloscopes
Satellite Set-top boxes
Communications Systems
Test Instrumentation
August 28, 2008
±0.15 LSB (typ)
1 GSPS (min)
www.national.com
3.5 mW (typ)
6.9 Bits (typ)
1.6 W (typ)
10
-15
8 Bits
(typ)

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adc08d1010diyb Summary of contents

Page 1

... Power Down Mode and is available in a 128-lead, thermally enhanced exposed pad LQFP and operates over the Indus- ≤ ≤ trial (-40°C T +85°C) temperature range. A © 2008 National Semiconductor Corporation Features ■ Internal Sample-and-Hold ■ Single +1.9V ±0.1V Operation ■ Choice of SDR or DDR output clocking ■ ...

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Block Diagram www.national.com 2 20146753 ...

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... Ordering Information Industrial Temperature Range (-40°C < T < +85°C) A ADC08D1010DIYB Pin Configuration * Exposed pad on back of package must be soldered to ground plane to ensure rated performance. NS Package 128-Pin Exposed Pad LQFP 3 20146701 www.national.com ...

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Pin Descriptions and Equivalent Circuits Pin Functions Pin No. Symbol 3 OutV / SCLK OutEdge / DDR / 4 SDATA 15 DCLK_RST CAL 29 PDQ 14 FSR/ECE www.national.com Equivalent Circuit Output Voltage Amplitude and Serial Interface Clock. ...

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Pin Functions Pin No. Symbol Equivalent Circuit CalDly / DES / 127 SCS 18 CLK+ 19 CLK I− Q− CMO V 31 ...

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Pin Functions Pin No. Symbol R 32 EXT 34 Tdiode_P 35 Tdiode_N DI7− / DQ7− DI7+ / DQ7 DI6− / DQ6− DI6+ / DQ6 DI5− ...

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Pin Functions Pin No. Symbol Equivalent Circuit 13, 16, 17, 20 25, 28, 33, 128 40, 51 ,62, 73, 88, 99 110, 121 12, 21, 24, 27, GND 41 42, ...

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Absolute Maximum Ratings (Notes Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( Voltage on Any Input Pin Ground Difference |GND ...

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Symbol Parameter SNR Signal-to-Noise Ratio THD Total Harmonic Distortion 2nd Harm Second Harmonic Distortion 3rd Harm Third Harmonic Distortion SFDR Spurious-Free dynamic Range IMD Intermodulation Distortion Out of Range Output Code (In addition to OR Output high) INTERLEAVE MODE (DES ...

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Symbol Parameter R Differential Input Resistance IN ANALOG OUTPUT CHARACTERISTICS V Common Mode Output Voltage CMO V input threshold to set DC CMO V CMO_LVL Coupling mode Common Mode Output Voltage TC V CMO Temperature Coefficient Maximum V load CMO ...

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Symbol Parameter Output Offset Voltage, see Figure Output Offset Voltage, see Figure Output Offset Voltage Change Δ Between Logic Levels I Output Short Circuit Current OS Z Differential Output Impedance O V ...

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Symbol Parameter t Sampling (Aperture) Delay AD t Aperture Jitter AJ Input Clock to Data Output Delay t OD (in addition to Pipeline Delay) Pipeline Delay (Latency) (Notes 11, 14) Over Range Recovery Time PD low to Rated Accuracy t ...

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Note 7: To guarantee accuracy required that V achieving rated performance requires that the backside exposed pad be well grounded. Note 8: Typical figures are 25°C, and represent most likely parametric norms. Test limits are ...

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Specification Definitions APERTURE (SAMPLING) DELAY is that time required after the fall of the clock input for the sampling switch to open. The Sample/Hold circuit effectively stops capturing the input sig- nal and goes into the “hold” mode the aperture ...

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SIGNAL TO NOISE RATIO (SNR) is the ratio, expressed in dB, of the rms value of the input signal at the output to the rms value of the sum of all other spectral components below one- half the sampling frequency, ...

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Timing Diagrams www.national.com FIGURE 3. ADC08D1010 Timing — SDR Clocking FIGURE 4. ADC08D1010 Timing — DDR Clocking 16 20146714 20146759 ...

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FIGURE 5. Serial Interface Timing FIGURE 6. Clock Reset Timing in DDR Mode FIGURE 7. Clock Reset Timing in SDR Mode with OUTEDGE Low 17 20146719 20146720 20146723 www.national.com ...

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FIGURE 8. Clock Reset Timing in SDR Mode with OUTEDGE High FIGURE 9. Self Calibration and On-Command Calibration Timing www.national.com 18 20146724 20146725 ...

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Typical Performance Characteristics INL vs. CODE DNL vs. CODE POWER DISSIPATION vs. SAMPLE RATE V =V =1.9V, F =1000MHz CLK INL vs. TEMPERATURE 20146764 DNL vs. TEMPERATURE 20146766 ENOB vs. CLOCK DUTY CYCLE 20146781 19 =25°C unless ...

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ENOB vs. TEMPERATURE ENOB vs. SAMPLE RATE SNR vs. TEMPERATURE www.national.com ENOB vs. SUPPLY VOLTAGE 20146776 ENOB vs. INPUT FREQUENCY 20146778 SNR vs. SUPPLY VOLTAGE 20146768 20 20146777 20146779 20146769 ...

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SNR vs. SAMPLE RATE 20146770 THD vs. TEMPERATURE 20146772 THD vs. SAMPLE RATE 20146774 SNR vs. INPUT FREQUENCY THD vs. SUPPLY VOLTAGE THD vs. INPUT FREQUENCY 21 20146771 20146773 20146775 www.national.com ...

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SFDR vs. TEMPERATURE SFDR vs. SAMPLE RATE CROSSTALK vs. SOURCE FREQUENCY www.national.com SFDR vs. SUPPLY VOLTAGE 20146785 SFDR vs. INPUT FREQUENCY 20146782 FULL POWER BANDWIDTH 20146763 22 20146784 20146783 20146786 ...

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Functional Description The ADC08D1010 is a versatile A/D Converter with an inno- vative architecture permitting very high speed operation. The controls available ease the application of the device to circuit solutions. Optimum performance requires adherence to the provisions discussed ...

Page 24

It is important that the input signals are either a.c. coupled to the inputs with the V pin grounded, or d.c. coupled with CMO the V pin left floating. An input common mode voltage CMO equal to the V ...

Page 25

If the LVDS lines are long and/or the system in which the ADC08D1010 is used is noisy, it may be necessary to tie the OutV pin high. The LVDS data output have a typical common mode voltage of ...

Page 26

The default state of the Extended Control Mode is set upon power-on reset (internally performed by the device) and is shown in Table 3. TABLE 3. Extended Control Mode Operation (Pin 14 Floating) Extended Control Mode Feature SDR or DDR ...

Page 27

Bit 10 nDE: DDR Enable. When this bit is set to 0b, data bus clocking follows the DDR (Dual Data Rate) mode whereby a data word is output with each rising and falling edge of DCLK. When this bit is ...

Page 28

Q-Channel Full-Scale Voltage Adjust Addr: Bh (1011b) D15 D14 D13 D12 D11 (MSB Adjust Value ) (LSB Bit 15:7 Full Scale Voltage Adjust Value. The input full- scale voltage or ...

Page 29

DES Fine Adjust Addr: Fh (1111b) D15 D14 D13 D12 D11 D10 (MSB) FAM (LSB Bits 15:7 Fine Adjust Magnitude. Each code value in this field delays either the "I" ...

Page 30

TABLE 5. DIFFERENTIAL INPUT TO OUTPUT RELATIONSHIP (Non-Extended Control Mode, FSR High − − 217.5mV V + 217.5mV − 109 109 ...

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Handling Single-Ended Input Signals There is no provision for the ADC08D1010 to adequately pro- cess single-ended input signals. The best way to handle single-ended signals is to convert them to differential signals before presenting them to the ADC. The ...

Page 32

CONTROL PINS Six control pins (without the use of the serial interface) provide a wide range of possibilities in the operation of the AD- C08D1010 and facilitate its use. These control pins provide Full-Scale Input Range setting, Self Calibration, ...

Page 33

The Calibration Delay will then only be a short delay. In the enhanced control mode, either input may be used for dual edge sampling. See Section 1.1.5.1. IMPORTANT NOTES : 1) For the Extended Control Mode ...

Page 34

FIGURE 15. Non-Spiking Power Supply The output drivers should have a supply voltage, V within the range specified in the Operating Ratings table. This voltage should not exceed the V supply voltage the power is applied to the ...

Page 35

The solution is to keep the analog cir- cuitry well separated from the digital circuitry. High power digital components should not be located on or near any linear component or power supply trace or plane that services ...

Page 36

Driving the V pin to change the reference voltage mentioned in Section 2.1, the reference voltage is intended to be fixed to provide one of two different full-scale values (650 mV and 870 mV ). Over driving this ...

Page 37

... Physical Dimensions inches (millimeters) unless otherwise noted NOTES: UNLESS OTHERWISE SPECIFIED REFERENCE JEDEC REGISTRATION MS-026, VARIATION BFB. 128-Lead Exposed Pad LQFP Order Number ADC08D1010DIYB NS Package Number VNX128A 37 www.national.com ...

Page 38

... 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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