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ADS5463IPFPG4

ADS5463IPFPG4

  • 厂商:

    BURR-BROWN(德州仪器)

  • 封装:

    HTQFP-80_12X12MM-EP

  • 描述:

    IC ADC 12BIT PIPELINED 80HTQFP

  • 数据手册
  • 价格&库存
ADS5463IPFPG4 数据手册
ADS5463 ADS54RF63 AD S5 463 www.ti.com ................................................................................................................................................... SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 12-Bit, 500-/550-MSPS Analog-to-Digital Converters • • FEATURES 1 • • • • • • • • • • 23 • • 12-Bit Resolution On-Chip Analog Buffer ADS5463: 500 MSPS ADS5463 SFDR: 77dBc at 300 MHz fIN ADS54RF63: 550 MSPS ADS54RF63 SFDR: 70dBc at 900 MHz fIN 2.3-GHz Input Bandwidth LVDS-Compatible Outputs Very Low Latency: 3.5 Clock Cycles High Analog Input Swing without Damage, > 10 Vpp Differential-AC Signal Total Power Dissipation: 2.2 W 80-Pin TQFP PowerPAD™ Package (14-mm × 14-mm footprint) Industrial Temperature Range: –40°C to 85°C Pin-Similar/Compatible to 12-, 13-, and 14-Bit Family: ADS5440/ADS5444/ADS5474 APPLICATIONS • • • • • • Test and Measurement Instrumentation Software-Defined Radio Data Acquisition Power Amplifier Linearization Communication Instrumentation Radar DESCRIPTION The ADS5463/ADS54RF63 is a 12-bit, 500-/550-MSPS analog-to-digital converter (ADC) that operates from both a 5-V supply and 3.3-V supply, while providing LVDS-compatible digital outputs. This ADC is one of a family of 12-, 13-, and 14-bit ADCs that operate from 210 MSPS to 550 MSPS. The ADS5463/ADS54RF63 input buffer isolates the internal switching of the onboard track and hold (T&H) from disturbing the signal source while providing a high-impedance input. The ADS54RF63 provides superior SFDR compared to the ADS5463 when the analog input frequency exceeds ~350 MHz or if operation up to 550 MSPS is required. The ADS5463/ADS54RF63 is available in a TQFP-80 PowerPAD™ package. The ADS5463/ADS54RF63 is built on the Texas Instrument complementary bipolar process (BiCom3) and specified over the full industrial temperature range (–40°C to 85°C). VIN VIN A1 TH1 + TH2 S + TH3 A2 ADC1 A3 ADC3 – – VREF S DAC1 ADC2 DAC2 Reference 5 5 4 Digital Error Correction CLK CLK Timing OVR OVR DRY DRY D[11:0] B0061-03 1 2 3 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PowerPAD is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2006–2009, Texas Instruments Incorporated ADS5463 ADS54RF63 SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 ................................................................................................................................................... www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because small parametric changes could cause the device not to meet its published specifications. PACKAGE/ORDERING INFORMATION (1) (2) PRODUCT PACKAGE-LEAD PACKAGE DESIGNATOR (1) SPECIFIED TEMPERATURE RANGE PACKAGE MARKING ADS5463 HTQFP-80 (2) PowerPAD PFP –40°C to 85°C ADS5463I ADS54RF63 HTQFP-80 (2) PowerPAD PFP –40°C to 85°C ADS54RF63I ORDERING NUMBER TRANSPORT MEDIA, QUANTITY ADS5463IPFP Tray, 96 ADS5463IPFPR Tape and reel, 1000 ADS54RF63IPFP Tray, 96 ADS54RF63IPFPR Tape and reel, 1000 For the most current product and ordering information, see the Package Option Addendum located at the end of this data sheet. Thermal pad size: 6.15 mm × 6.15 mm (min), 7.5 mm × 7.5 mm (maximum), see Thermal Pad Addendum located at the end of the data sheet. ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) (1) ADS5463/ADS54RF63 Supply voltage AVDD5 to GND 6 AVDD3 to GND 5 DVDD3 to GND 5 AC Signal AIN, AIN to GND (2) AIN to AIN (2) Voltage difference between pin and ground Voltage difference between these pins CLK, CLK to GND CLK to CLK (2) Data output to GND (2) Voltage difference between pin and ground Voltage difference between these pins 0.4 to 4.4 DC signal, TJ = 125°C 1.0 to 3.8 AC Signal -5.2 to 5.2 DC Signal, TJ = 105°C -4.0 to 4.0 DC signal, TJ = 125°C -2.8 to 2.8 DC signal, TJ = 105°C 1.1 to 3.7 AC Signal -3.3 to 3.3 DC signal, TJ = 105°C -3.3 to 3.3 DC signal, TJ = 125°C -2.6 to 2.6 LVDS digital outputs Storage temperature range ESD, human-body model (HBM) 2 V 0.1 to 4.7 DC signal, TJ = 125°C Maximum junction temperature (max TJ) (2) V –0.3 to (AVDD5 + 0.3) Operating temperature range (1) V –0.3 to (AVDD5 + 0.3) DC signal, TJ = 105°C AC signal (2) UNIT V V –0.3 to (DVDD3 + 0.3) V –40 to 85 °C 150 °C –65 to 150 °C 2 kV Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not implied. Kirkendall voidings and current density information for calculation of expected lifetime is available upon request. Valid when supplies are within recommended operating range. Submit Documentation Feedback Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 ADS5463 ADS54RF63 www.ti.com ................................................................................................................................................... SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 THERMAL CHARACTERISTICS (1) PARAMETER RθJA (2) RθJP (3) (1) (2) (3) TEST CONDITIONS TYP Soldered thermal pad, no airflow 23.7 Soldered thermal pad, 150-LFM airflow 17.8 Soldered thermal pad, 250-LFM airflow 16.4 Bottom of package (thermal pad) 2.99 UNIT °C/W °C/W Using 36 thermal vias (6 × 6 array). See PowerPAD Package in the Application Information section. RθJA is the thermal resistance from the junction to ambient. RθJP is the thermal resistance from the junction to the thermal pad. RECOMMENDED OPERATING CONDITIONS ADS54RF63 MIN TA Open free-air temperature NOM –40 ADS5463 MAX MIN 85 –40 NOM MAX UNIT 85 °C SUPPLIES AVDD5 Analog supply voltage 4.75 5 5.25 4.75 5 5.25 V AVDD3 Analog supply voltage 3.0 3.3 3.6 3.0 3.3 3.6 V DVDD3 Output driver supply voltage 3.0 3.3 3.6 3.0 3.3 3.6 V ANALOG INPUT VCM Differential input range 2.2 2.2 Vpp Input common mode 2.4 2.4 V 10 10 pF DIGITAL OUTPUT (DRY, DATA, OVR) Maximum differential output load CLOCK INPUT (CLK) CLK input sample rate (sine wave) 40 550 20 500 MSPS Clock amplitude, differential sine wave, see Figure 59 0.5 3.5 0.5 3.5 Vpp 60% 40% Clock duty cycle, see Figure 64 40% 50% Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 50% 60% Submit Documentation Feedback 3 ADS5463 ADS54RF63 SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 ................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS Typical values at TA = 25°C, minimum and maximum values over full temperature range TMIN = –40°C to TMAX = 85°C, ADS5463 sampling rate = 500 MSPS, ADS54RF63 sampling rate = 550 MSPS, 50% clock duty cycle, AVDD5 = 5 V, AVDD3 = 3.3 V, DVDD3 = 3.3 V, –1-dBFS differential input, and 3-VPP differential clock, unless otherwise noted PARAMETER TEST CONDITIONS Resolution ADS54RF63 MIN TYP ADS5463 MAX MIN TYP MAX UNIT 12 12 Bits 2.2 2.2 VPP ANALOG INPUTS Differential input VCM CMRR Common-mode voltage Self-biased 2.4 2.4 V Input resistance To VCM 500 500 Ω Input capacitance To ground (un-soldered package) 2.3 2.3 pF Input bandwidth (–3 dB) 2.3 2.3 GHz Common-mode rejection ratio Common mode signal = 10 MHz 90 90 dB 1000 1000 Ω CLOCK INPUTS Input resistance To internal common-mode Input capacitance To ground (un-soldered package) 1.5 1.5 pF Common mode Internally generated 2.4 2.4 V 2.4 2.4 V INTERNAL REFERENCE VOLTAGE VREF 4 Reference voltage Submit Documentation Feedback Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 ADS5463 ADS54RF63 www.ti.com ................................................................................................................................................... SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 ELECTRICAL CHARACTERISTICS (continued) Typical values at TA = 25°C, minimum and maximum values over full temperature range TMIN = –40°C to TMAX = 85°C, ADS5463 sampling rate = 500 MSPS, ADS54RF63 sampling rate = 550 MSPS, 50% clock duty cycle, AVDD5 = 5 V, AVDD3 = 3.3 V, DVDD3 = 3.3 V, –1-dBFS differential input, and 3-VPP differential clock, unless otherwise noted PARAMETER TEST CONDITIONS ADS54RF63 MIN TYP ADS5463 MAX MIN TYP MAX UNIT DYNAMIC ACCURACY No missing codes DNL Differential linearity error INL Integral linearity error Specified Specified fIN = 10 MHz –0.95 ±0.5 0.95 –0.95 ±0.25 0.95 LSB 500MSPS, fIN = 10 MHz –2.5 ±0.7 2.5 –2.5 +0.8/–0.3 2.5 LSB 550MSPS, fIN = 10 MHz –4.5 ±1.5 4.5 Offset error –11 Offset temperature coefficient 11 NA –11 0.0005 Gain error –5 Gain temperature coefficient LSB 11 0.0005 5 –0.02 –5 mV mV/°C 5 –0.02 %FS %FS/°C POWER SUPPLY IAVDD5 5-V analog supply current IAVDD3 3.3-V analog supply current 310 340 300 330 mA 140 155 125 138 mA 82 88 82 88 mA Total power dissipation 2.25 2.5 2.18 2.4 W Power-up time 200 200 µs 85 85 dB VIN = full scale, fIN = 10 MHz 3.3-V digital IDVDD3 supply current (includes LVDS) PSRR Power-supply rejection ratio Without 0.1-µF board supply capacitors, with 100-kHz supply noise Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 Submit Documentation Feedback 5 ADS5463 ADS54RF63 SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 ................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS (continued) Typical values at TA = 25°C, minimum and maximum values over full temperature range TMIN = –40°C to TMAX = 85°C, ADS5463 sampling rate = 500 MSPS, ADS54RF63 sampling rate = 550 MSPS, 50% clock duty cycle, AVDD5 = 5 V, AVDD3 = 3.3 V, DVDD3 = 3.3 V, –1-dBFS differential input, and 3-VPP differential clock, unless otherwise noted PARAMETER TEST CONDITIONS ADS54RF63 MIN TYP ADS5463 MAX MIN TYP MAX UNIT DYNAMIC AC CHARACTERISTICS CLK Maximum clock frequency RMS idle-channel noise 550 500 MHz Inputs tied to common-mode 0.8 0.7 fIN = 10 MHz 64.7 65.4 fIN = 70 MHz 64.6 fIN = 100 MHz 64.6 fIN = 230 MHz 64.4 LSB SNR, Signal-to-Noise Ratio fS = 500MSPS SNR fS = 550MSPS fIN = 300 MHz 62.5 65.4 63.5 65.3 65.1 64.3 63 65 fIN = 450 MHz 64.1 64.6 fIN = 650 MHz 63.5 63.9 fIN = 900 MHz 62.5 62.6 fIN = 1.3 GHz 61 59.3 fIN = 100 MHz 62.6 NA 61.9 NA 59.3 NA fIN = 10 MHz 85 85 fIN = 70 MHz 83 fIN = 100 MHz 84 fIN = 230 MHz 81 fIN = 450 MHz 59 fIN = 1.3 GHz dBFS SFDR, Spurious-Free Dynamic Range fS = 500MSPS SFDR fS = 550MSPS fIN = 300 MHz 82 78 78 64 77 fIN = 450 MHz 80 75 fIN = 650 MHz 75 65 fIN = 900 MHz 70 56 fIN = 1.3 GHz 58 45 fIN = 100 MHz 76 NA 75 NA 57 NA fIN = 450 MHz fIN = 1.3 GHz 6 64 82 70 Submit Documentation Feedback 62 dBc Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 ADS5463 ADS54RF63 www.ti.com ................................................................................................................................................... SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 ELECTRICAL CHARACTERISTICS (continued) Typical values at TA = 25°C, minimum and maximum values over full temperature range TMIN = –40°C to TMAX = 85°C, ADS5463 sampling rate = 500 MSPS, ADS54RF63 sampling rate = 550 MSPS, 50% clock duty cycle, AVDD5 = 5 V, AVDD3 = 3.3 V, DVDD3 = 3.3 V, –1-dBFS differential input, and 3-VPP differential clock, unless otherwise noted PARAMETER TEST CONDITIONS ADS54RF63 MIN TYP ADS5463 MAX MIN TYP MAX UNIT HD2, Second Harmonic fS = 500MSPS HD2 fS = 550MSPS fIN = 10 MHz 87 fIN = 70 MHz 87 fIN = 100 MHz 85 fIN = 230 MHz 83 fIN = 300 MHz 64 79 87 82 70 80 81 64 77 fIN = 450 MHz 81 80 fIN = 650 MHz 75 77 fIN = 900 MHz 70 66 fIN = 1.3 GHz 58 50 fIN = 100 MHz 84 NA 78 NA fIN = 1.3 GHz 63 NA fIN = 10 MHz 90 85 fIN = 70 MHz 92 90 fIN = 100 MHz 89 fIN = 230 MHz 85 fIN = 450 MHz 62 dBc HD3, Third Harmonic fS = 500MSPS HD3 fS = 550MSPS fIN = 300 MHz 64 83 70 87 90 64 80 fIN = 450 MHz 90 75 fIN = 650 MHz 76 65 fIN = 900 MHz 78 56 fIN = 1.3 GHz 58 45 fIN = 100 MHz 76 NA 75 NA 57 NA fIN = 10 MHz 86 86 fIN = 70 MHz 86 86 fIN = 100 MHz 86 86 fIN = 230 MHz 83 77 fIN = 300 MHz 82 81 fIN = 450 MHz 86 86 fIN = 650 MHz 85 85 fIN = 900 MHz 82 78 fIN = 1.3 GHz 78 67 fIN = 100 MHz 82 NA fIN = 450 MHz 81 NA fIN = 1.3 GHz 74 NA fIN = 450 MHz 62 fIN = 1.3 GHz dBc Worst Harmonic/Spur (other than HD2 and HD3) fS = 500MSPS Worst nonHD2/3 fS = 550MSPS Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 Submit Documentation Feedback dBc 7 ADS5463 ADS54RF63 SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 ................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS (continued) Typical values at TA = 25°C, minimum and maximum values over full temperature range TMIN = –40°C to TMAX = 85°C, ADS5463 sampling rate = 500 MSPS, ADS54RF63 sampling rate = 550 MSPS, 50% clock duty cycle, AVDD5 = 5 V, AVDD3 = 3.3 V, DVDD3 = 3.3 V, –1-dBFS differential input, and 3-VPP differential clock, unless otherwise noted PARAMETER TEST CONDITIONS ADS54RF63 MIN TYP ADS5463 MAX MIN TYP MAX UNIT THD, Total Harmonic Distortion fS = 500MSPS THD fS = 550MSPS fIN = 10 MHz 82 80 fIN = 70 MHz 82 79 fIN = 100 MHz 80 77 fIN = 230 MHz 78 75 fIN = 300 MHz 76 73 fIN = 450 MHz 77 73 fIN = 650 MHz 69 64 fIN = 900 MHz 64 55 fIN = 1.3 GHz 56 44 fIN = 100 MHz 74 NA fIN = 450 MHz 72 NA fIN = 1.3 GHz 56 NA fIN = 10 MHz 63.6 64.2 fIN = 70 MHz 63.5 64.2 fIN = 100 MHz 63.5 fIN = 230 MHz 63.2 63.7 63.1 63.5 fIN = 450 MHz 62.9 63.1 fIN = 650 MHz 61.5 60.5 fIN = 900 MHz 59.6 54.4 fIN = 1.3 GHz 54.4 44.1 fIN = 100 MHz 61.3 NA 60.1 NA 54 NA dBc SINAD, Signal-to-Noise and Distortion fS = 500MSPS SINAD fS = 550MSPS fIN = 300 MHz 60 fIN = 450 MHz 57 fIN = 1.3 GHz ENOB, Effective Number of Bits (from SINAD in dBc) fS = 500MSPS ENOB fS = 550MSPS (1) 8 64.1 10.3 10.4 10.4 fIN = 900 MHz 9.6 8.7 fIN = 1.3 GHz 8.7 7 9.7 NA 8.7 NA fIN = 1.3 GHz 9.67 10 10.2 fIN = 450 MHz dBc (1) fIN = 100 MHz fIN = 300 MHz 62 9.18 Bits ENOB = [SINAD(dBc) - 1.76] / 6.02 Submit Documentation Feedback Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 ADS5463 ADS54RF63 www.ti.com ................................................................................................................................................... SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 ELECTRICAL CHARACTERISTICS (continued) Typical values at TA = 25°C, minimum and maximum values over full temperature range TMIN = –40°C to TMAX = 85°C, ADS5463 sampling rate = 500 MSPS, ADS54RF63 sampling rate = 550 MSPS, 50% clock duty cycle, AVDD5 = 5 V, AVDD3 = 3.3 V, DVDD3 = 3.3 V, –1-dBFS differential input, and 3-VPP differential clock, unless otherwise noted PARAMETER ADS54RF63 TEST CONDITIONS MIN TYP ADS5463 MAX MIN TYP UNIT MAX Two-Tone SFDR fS = 500MSPS 2-tone SFDR fS = 550MSPS fIN1 = 65 MHz, fIN2 = 70 MHz, each tone at –7 dBFS 90 90 fIN1 = 65 MHz, fIN2 = 70 MHz, each tone at –16 dBFS 90 89 fIN1 = 350 MHz, fIN2 = 355 MHz, each tone at –7 dBFS 90 82 fIN1 = 350 MHz, fIN2 = 355 MHz, each tone at –16 dBFS 90 89 fIN1 = 397.5 MHz, fIN2 = 402.5 MHz, each tone at –7 dBFS 90 fIN1 = 647.5 MHz, fIN2 = 652.5 MHz, each tone at –7 dBFS 84 dBFS NA NA LVDS DIGITAL OUTPUTS VOD Differential output voltage (±) VOC Common-mode output voltage 247 350 1.125 454 247 1.375 1.125 350 454 mV 1.375 V Sample N–1 N+4 N+2 ta N N+1 N+3 tCLKH N+5 tCLKL CLK CLK Latency = 3.5 Clock Cycles tDRY DRY (1) DRY tDATA D[11:0], OVR N–1 N N+1 D[11:0], OVR T0158-01 (1) Polarity of DRY is undetermined. For further information, see the Digital Outputs section. Figure 1. Timing Diagram Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 Submit Documentation Feedback 9 ADS5463 ADS54RF63 SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 ................................................................................................................................................... www.ti.com TIMING CHARACTERISTICS (1) Typical values at TA = 25°C, minimum and maximum values over full temperature range TMIN = –40°C to TMAX = 85°C, sampling rate = maximum rated, 50% clock duty cycle, AVDD5 = 5 V, AVDD3 = 3.3 V, DVDD3 = 3.3 V, and 3-VPP differential clock (unless otherwise noted) PARAMETER ta TEST CONDITIONS ADS54RF63 MIN TYP ADS5463 MAX MIN TYP MAX UNIT Aperture delay 200 200 ps Aperture jitter, rms 150 150 fs Latency 3.5 tCLK Clock period 1.8181 tCLKH Clock pulse duration, high tCLKL Clock pulse duration, low (2) 3.5 50 2 cycles 50 ns Assumes min 40% duty cycle 0.727 0.8 ns 0.727 0.8 ns tDRY CLK to DRY delay Zero crossing 1350 1750 950 1600 ps tDATA CLK to DATA/OVR delay (2) Zero crossing 1100 2000 750 2100 ps tSKEW DATA to DRY skew tDATA – tDRY –250 250 –350 650 ps tRISE DRY/DATA/OVR rise time 500 500 ps tFALL DRY/DATA/OVR fall time 500 500 ps (1) (2) 10 0 0 Timing parameters are specified by design or characterization, but not production tested. 0 dBFS are Over-Ranging the ADC Mid-Scale Code Error − % 3 2 Error After Positive Over-Range 1 0 −1 Error After Negative Over-Range −2 −3 −4 −1 0 1 2 3 4 5 6 Analog Input Amplitude − dBFS G055 Figure 52. 28 Submit Documentation Feedback Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 ADS5463 ADS54RF63 www.ti.com ................................................................................................................................................... SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 External Voltage Reference For systems that require the analog signal gain to be adjusted or calibrated, this can be performed by using an external reference. The dependency on the signal amplitude to the value of the external reference voltage is characterized typically by Figure 53 (VREF = 2.4 V is normalized to 0 dB as this is the internal reference voltage). (This figure is the average gain adjustment from the data collected from -1dBFS to -6dBFS in 1 dB steps.) As can be seen in the linear fit, this equates to approximately –0.3 dB of signal adjustment per 100 mV of reference adjustment. The range of allowable variation depends on the analog input amplitude that is applied to the inputs and the desired spectral performance, as can be seen in the performance versus external reference graphs in Figure 54 and Figure 55. As the applied analog signal amplitude is reduced, more variation in the reference voltage is allowed in the positive direction (which equates to a reduction in signal amplitude), whereas an adjustment in reference voltage below the nominal 2.4 V (which equates to an increase in signal amplitude) is not recommended below approximately 2.35 V. The power consumption versus reference voltage and operating temperature should also be considered, especially at high ambient temperatures, because the lifetime of the device is affected by internal junction temperature, see Figure 68. The ADS5463/ADS54RF63 does not have a VCM output pin and uses the VREF pin to provide the common-mode voltage in dc-coupled applications. The ADS5463/ADS54RF63 (VCM = 2.4 V) and ADS5474 (VCM = 3.1 V) do not have the same common-mode voltage, but they do share the same approximate VREF (2.4 V). To create a board layout that may accommodate both devices in dc-coupled applications, route the VCM of the ADS5474 and the VREF of the ADS5463/ADS54RF63 both to a common point that can be selected via a switch, jumper, or a 0-Ω resistor to be used as the common-mode voltage of the driving circuit. Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 Submit Documentation Feedback 29 ADS5463 ADS54RF63 SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 ................................................................................................................................................... www.ti.com 90 1.0 Normalized Gain Adjustment − dB 0.5 0.0 SFDR − Spurious-Free Dynamic Range − dBc fS = 500 MSPS fIN = 230 MHz AIN = < −1 dBFS Best Fit: y = −3.06x + 7.33 −0.5 −1.0 Normalized Amplitude −1.5 −2.0 Linear (Normalized Amplitude) −2.5 AIN = −5 dBFS AIN = −6 dBFS 80 70 AIN = −4 dBFS 50 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 AIN = −1 dBFS AIN = −2 dBFS fS = 500 MSPS fIN = 230 MHz Normalized to 0 dB at Nominal VREF = 2.4 V −3.0 2.2 AIN = −3 dBFS 60 40 2.05 2.15 2.25 2.35 2.45 2.55 2.65 2.75 2.85 2.95 3.05 3.15 3.1 External VREF Applied − V External VREF Applied − V G042 G019 Figure 53. ADS5463 Signal Gain Adjustment versus External Reference (VREF) Figure 54. ADS5463 SFDR versus External VREF and AIN 3.0 70 2.9 65 fS = 500 MSPS fIN = 230 MHz 2.8 2.7 60 P − Power − W SNR − Signal-to-Noise Ratio − dBFS AIN = −6 dBFS AIN = −2 dBFS 55 AIN = −3 dBFS 50 AIN = −4 dBFS 2.5 2.4 2.3 AIN = −1 dBFS 45 2.6 2.2 AIN = −5 dBFS 2.1 fS = 500 MSPS fIN = 230 MHz 40 2.05 2.15 2.25 2.35 2.45 2.55 2.65 2.75 2.85 2.95 3.05 3.15 2.0 2.05 2.15 2.25 2.35 2.45 2.55 2.65 2.75 2.85 2.95 3.05 3.15 External VREF Applied − V External VREF Applied − V G052 G051 Figure 55. ADS5463 SNR versus External VREF and AIN 30 Submit Documentation Feedback Figure 56. Total Power Consumption versus External VREF Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 ADS5463 ADS54RF63 www.ti.com ................................................................................................................................................... SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 Clock Inputs The ADS5463/ADS54RF63 clock input can be driven with either a differential clock signal or a single-ended clock input. The equivalent clock input circuit can be seen in Figure 57. The 0.5 pF of parasitic package capacitance is before soldering. When jitter may not be a big concern, the use of a single-ended clock (as shown in Figure 58) could save cost and board space without much performance tradeoff. When clocked with this configuration, it is best to connect CLK to ground with a 0.01-µF capacitor, while CLK is ac-coupled with a 0.01-µF capacitor to the clock source, as shown in Figure 58. ADS5463/5474/54RF63 AVDD5 ~ 2.5 nH Bond Wire CLK ~ 200 fF Bond Pad ~ 0.5 pF Package Parasitic ~ 0.8 pF 1000 W GND AVDD5 Internal Clock Buffer ~ 2.4 V GND Parasitic ~ 0.8 pF 1000 W ~ 2.5 nH Bond Wire CLK ~ 0.5 pF Package ~ 200 fF Bond Pad GND S0292-01 Figure 57. Clock Input Circuit (unsoldered package) Square Wave or Sine Wave CLK 0.01 mF ADS5463 CLK 0.01 mF S0168-05 Figure 58. Single-Ended Clock Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 Submit Documentation Feedback 31 ADS5463 ADS54RF63 SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 ................................................................................................................................................... www.ti.com 66.0 79 fIN = 100 MHz SNR − Signal-to-Noise Ratio − dBFS SFDR − Spurious-Free Dynamic Range − dBc 80 78 77 fIN = 300 MHz 76 75 74 73 fIN = 100 MHz 65.5 65.0 fIN = 300 MHz 64.5 64.0 63.5 63.0 72 fS = 500 MSPS fS = 500 MSPS 62.5 71 0 1 2 3 4 0 5 Clock Amplitude − VP−P 1 G022 Figure 59. ADS5463 SFDR versus Differential Clock Level 2 3 Clock Amplitude − VP−P 4 5 G023 Figure 60. ADS5463 SNR versus Differential Clock Level The characterization of the ADS5463/ADS54RF63 is typically performed with a 3-VPP differential clock, but the ADC performs well with a differential clock amplitude down to ~0.5 VPP (250-mV swing on both CLK and CLK), as shown in Figure 59 and Figure 60. For jitter-sensitive applications, the use of a differential clock has some advantages at the system level. The differential clock allows for common-mode noise rejection at the printed circuit board (PCB) level. With a differential clock, the signal-to-noise ratio of the ADC is better for jitter-sensitive, high-frequency applications because the board level clock jitter is superior. Larger clock amplitude levels are recommended for high analog input frequencies or slow clock frequencies. At high analog input frequencies, the sampling process is sensitive to jitter. At slow clock frequencies, a small amplitude sinusoidal clock has a lower slew rate and can create jitter-related SNR degradation due to the uncertainty in the sampling point associated with a slow slew rate. Figure 61 demonstrates a recommended method for converting a single-ended clock source into a differential clock; it is similar to the configuration found on the evaluation board and was used for much of the characterization. See also Clocking High Speed Data Converters (SLYT075) for more details. 0.1 mF Clock Source CLK ADS5463 CLK S0194-02 Figure 61. Differential Clock The common-mode voltage of the clock inputs is set internally to 2.4 V using internal 1-kΩ resistors (see Figure 57). It is recommended to use ac coupling, but if this scheme is not possible, the ADS5463 features good tolerance to clock common-mode variation, as shown in Figure 62 and Figure 63 (the ADS54RF63 behaves similarly). The internal ADC core uses both edges of the clock for the conversion process. Ideally, a 50% duty-cycle clock signal should be provided, though even 40/60 is good enough for many applications. Performance degradation as a result of duty cycle can be seen in Figure 64. 32 Submit Documentation Feedback Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 ADS5463 ADS54RF63 www.ti.com ................................................................................................................................................... SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 66 fIN = 100 MHz SNR − Signal-to-Noise Ratio − dBFS SFDR − Spurious-Free Dynamic Range − dBc 85 fIN = 100 MHz 80 fIN = 300 MHz 75 70 65 65 fIN = 300 MHz 64 63 62 61 fS = 500 MSPS fS = 500 MSPS 60 60 0 1 2 3 4 5 0 1 Clock Common Mode − V 2 3 4 5 Clock Common Mode − V G024 G025 Figure 62. ADS5463 SFDR versus Clock Common Mode Figure 63. ADS5463 SNR versus Clock Common Mode SFDR − Spurious-Free Dynamic Range − dBc 85 fIN = 100 MHz 80 75 fIN = 300 MHz 70 65 60 55 fS = 500 MSPS 50 20 30 40 50 60 70 80 Duty Cycle − % G021 Figure 64. ADS5463 SFDR vs Clock Duty Cycle To understand how to determine the required clock jitter, an example is useful. The ADS5463 is capable of achieving 63.6 dBFS SNR at 450 MHz of analog input frequency. In order to achieve this SNR at 450 MHz the clock source rms jitter must be at least 181 fsec when combined with the 150 fsec of internal aperture jitter in order for the total rms jitter to be 234 fsec. A summary of maximum recommended rms clock jitter as a function of analog input frequency is provided in Table 2 (using 150 fsec of internal aperture jitter). The equations used to create the table are also presented. Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 Submit Documentation Feedback 33 ADS5463 ADS54RF63 SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 ................................................................................................................................................... www.ti.com Table 2. Recommended RMS Clock Jitter INPUT FREQUENCY (MHz) MEASURED SNR (dBc) TOTAL JITTER (fsec rms) MAXIMUM CLOCK JITTER (fsec rms) 10 64.4 9590 9589 70 64.4 1370 1362 100 64.3 970 959 230 64.1 432 405 300 64 335 300 450 63.6 234 181 650 62.9 175 94 1300 58.3 149 16 Equation 1 and Equation 2 are used to estimate the required clock source jitter. SNR (dBc) = -20 x LOG10 (2 x p x fIN x jTOTAL) jTOTAL = (jADC2 + jCLOCK2)1/2 (1) (2) where: jTOTAL = the rms summation of the clock and ADC aperture jitter; jADC = the ADC internal aperture jitter which is located in the data sheet; jCLOCK = the rms jitter of the clock at the clock input pins to the ADC; and fIN = the analog input frequency. Notice that the SNR is a strong function of the analog input frequency, not the clock frequency. The slope of the clock source edges can have a mild impact on SNR as well and is not taken into account for these estimates. For this reason, maximizing clock source amplitudes at the ADC clock inputs is recommended, though not required (faster slope is desirable for jitter-related SNR). For more information on clocking high-speed ADCs, see application note SLWA034, Implementing a CDC7005 Low Jitter Clock Solution For High-Speed, High-IF ADC Devices. Recommended clock distribution chips (CDCs) are the TI CDC7005, the CDCM7005, and the CDCE72010. Depending on the jitter requirements, a band pass filter (BPF) is sometimes required between the CDC and the ADC. If the insertion loss of the BPF causes the clock amplitude to be too low for the ADC, or the clock source amplitude is too low to begin with, an inexpensive amplifier can be placed between the CDC and the BPF. Figure 65 represents a scenario where an LVCMOS single-ended clock output is used from a TI CDCM7005 with the clock signal path optimized for maximum amplitude and minimum jitter. This type of conditioning might generally be well-suited for use with greater than 250 MHz of input frequency. The jitter of this setup is difficult to estimate and requires a careful phase noise analysis of the clock path. The BPF (and possibly a low-cost amplifier because of insertion loss in the BPF) can improve the jitter between the CDC and ADC when the jitter provided by the CDC is still not adequate. The total jitter at the CDCM7005 output depends largely on the phase noise of the VCXO selected, as well as the CDCM7005, and typically has 50 fs – 100 fs of rms jitter. If it is determined that the jitter from the CDCM7005 with a VCXO is sufficient without further conditioning, it is possible to clock the ADS5463/ADS54RF63 directly from the CDCM7005 using differential LVPECL outputs, as illustrated in Figure 66 (see the CDCM7005 data sheet for the exact schematic). This scenario may be more suitable for less than 150 MHz of input frequency where jitter is not as critical. A careful analysis of the required jitter and of the components involved is recommended before determining the proper approach. 34 Submit Documentation Feedback Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 ADS5463 ADS54RF63 www.ti.com ................................................................................................................................................... SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 Low-Jitter Clock Distribution AMP and/or BPF are Optional Board Master Reference Clock (High or Low Jitter) 10 MHz REF LVCMOS CLKIN BPF AMP XFMR 500 MHz CLKIN ADC 1000 MHz (to Transmit DAC) ADS5463 125 MHz (to DSP) LVPECL or LVCMOS Low-Jitter Oscillator 1000 MHz VCO . . . 250 MHz (to FPGA) To Other CDC (Clock Distribution Chip) CDCM7005 This is an Example Block Diagram. B0268-03 Consult the CDCM7005 data sheet for proper schematic and specifications regarding allowable input and output frequency and amplitude ranges. Figure 65. Optimum Jitter Clock Circuit Low-Jitter Clock Distribution Board Master Reference Clock (High or Low Jitter) 10 MHz 500 MHz CLKIN LVPECL REF CLKIN ADC 1000 MHz (to Transmit DAC) ADS5463 125 MHz (to DSP) Low-Jitter Oscillator 1000 MHz VCO LVPECL or LVCMOS . . . 250 MHz (to FPGA) To Other CDC (Clock Distribution Chip) CDCM7005 This is an Example Block Diagram. B0343-01 Consult the CDCM7005 data sheet for proper schematic and specifications regarding allowable input and output frequency and amplitude ranges. Figure 66. Acceptable Jitter Clock Circuit Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 Submit Documentation Feedback 35 ADS5463 ADS54RF63 SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 ................................................................................................................................................... www.ti.com Digital Outputs The ADC provides 12 LVDS-compatible, offset binary data outputs (D11 to D0; D11 is the MSB and D0 is the LSB), a data-ready signal (DRY), and an over-range indicator (OVR). It is recommended to use the DRY signal to capture the output data of the ADS5463/ADS54RF63. DRY is source-synchronous to the DATA/OVR outputs and operates at the same frequency, creating a half-rate DDR interface that updates data on both the rising and falling edges of DRY. It is recommended that the capacitive loading on the digital outputs be minimized. Higher capacitance shortens the data-valid timing window. The values given for timing (see Figure 1) were obtained with a measured 10-pF parasitic board capacitance to ground on each LVDS line (or 5-pF differential parasitic capacitance). When setting the time relationship between DRY and DATA at the receiving device, it is generally recommended that setup time be maximized, but this partially depends on the setup and hold times of the device receiving the digital data (like an FPGA, Field Programmable Gate Array). Since DRY and DATA are coincident, it will likely be necessary to delay either DRY or DATA such that setup time is maximized. Referencing Figure 1, the polarity of DRY with respect to the sample N data output transition is undetermined because of the unknown startup logic level of the clock divider that generates the DRY signal (DRY is a frequency divide-by-two of CLK). Either the rising or the falling edge of DRY will be coincident with sample N and the polarity of DRY could invert when power is cycled off/on. Data capture from the transition and not the polarity of DRY is recommended, but not required. If the synchronization of multiple ADS5463/ADS54RF63 devices is required, it might be necessary to use a form of the CLKIN signal rather than DRY to capture the data. Studying the timing characteristics, it can be seen that the ADS54RF63 offers more tightly controlled timing parameters than the ADS5463. Depending on the setup/hold requirements of the FPGA in use, it may be possible to use the DRY from a single ADS54RF63 to latch data into the FPGA from multiple ADS54RF63. This would prove much more difficult with the ADS5463 at full clock speed due to more restrictive timing parameters. The DRY frequency is identical on the ADS5463/ADS54RF63 to the ADS5474 (where DRY equals half of the CLK frequency), but different to the pin-similar ADS5444/ADS5440 (where DRY equals the CLK frequency). The LVDS outputs all require an external 100-Ω load between each output pair in order to meet the expected LVDS voltage levels. For long trace lengths, it may be necessary to place a 100-Ω load on each digital output as close to the ADC as possible and another 100-Ω differential load at the end of the LVDS transmission line to provide matched impedance and avoid signal reflections. The effective load in this case reduces the LVDS voltage levels by half. The OVR output equals a logic high when the 12-bit output word attempts to exceed either all 0s or all 1s. The digital outputs will clip to all 0s or all 1s if the input is out of range. The OVR signal is provided as an indicator that the analog input signal exceeded the full-scale input limit of approximately 2.2 VPP (± gain error). The OVR indicator is provided for systems that use gain control to keep the analog input signal within acceptable limits. 36 Submit Documentation Feedback Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 ADS5463 ADS54RF63 www.ti.com ................................................................................................................................................... SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 Power Supplies The ADS5463/ADS54RF63 uses three power supplies. For the analog portion of the design, a 5-V and 3.3-V supply (AVDD5 and AVDD3) are used, while the digital portion uses a 3.3-V supply (DVDD3). The use of low-noise power supplies with adequate decoupling is recommended. Linear supplies are preferred to switched supplies; switched supplies tend to generate more noise components that can be coupled to the ADS5463/ADS54RF63. However, the PSRR value and the plot shown in Figure 67 were obtained without bulk supply decoupling capacitors. When bulk (0.1 µF) decoupling capacitors are used, the board-level PSRR is much higher than the stated value for the ADC. The user may be able to supply power to the device with a less-than-ideal supply and still achieve good performance. It is not possible to make a single recommendation for every type of supply and level of decoupling for all systems. If the noise characteristics of the available supplies are understood, a study of the PSRR data for the ADS5463/ADS54RF63 may provide the user with enough information to select noisy supplies if the performance is still acceptable within the frequency range of interest. The power consumption of the ADS5463/ADS54RF63 does not change substantially over clock rate or input frequency as a result of the architecture and process. The DVDD3 PSRR is superior to both the AVDD5 and AVDD3 so was not graphed. Because there are two diodes connected in reverse between AVDD3 and DVDD3 internally, a power-up sequence is recommended. When there is a delay in power up between these two supplies, the one that lags could have current sinking through an internal diode before it powers up. The sink current can be large or small depending on the impedance of the external supply and could damage the device or affect the supply source. The best power up sequence is one of the following options (regardless of when AVDD5 powers up): • Power up both AVDD3 and DVDD3 at the same time (best scenario), OR • Keep the voltage difference less than 0.8 V between AVDD3 and DVDD3 during the power up (0.8 V is not a hard specification - a smaller delta between supplies is safer). If the above sequences are not practical then the sink current from the supply needs to be controlled or protection added externally. The max transient current (on the order of µsec) for the DVDD3 or AVDD3 pin is 500 mA to avoid potential damage to the device or reduce its lifetime. The values for the analog and clock inputs given in the Absolute Maximum Ratings are valid when the supplies are on. When the power supplies are off and the clock or analog inputs are still being actively driven, the input voltage and current need to be limited to avoid device damage. If the ADC supplies are off, max/min continuous dc voltage is ±0.95 V and max dc current is 20 mA for each input pin (clock or analog), relative to ground. PSRR − Power Supply Rejection Ratio − dB 100 AVDD3 90 80 AVDD5 70 60 50 fS = 500 MSPS fIN = None 40 0.01 0.1 1 10 100 f − Frequency − MHz G032 Figure 67. PSRR versus Supply Injected Frequency Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 Submit Documentation Feedback 37 ADS5463 ADS54RF63 SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 ................................................................................................................................................... www.ti.com Operational Lifetime It is important for applications that anticipate running continuously for long periods of time near the maximum-rated ambient temperature of +85°C to consider the data shown in Figure 68 and Figure 69. Referring to the Thermal Characteristics table, the worst-case operating condition with no airflow has a thermal rise of 23.7°C/W. At approximately 2.2 W of normal power dissipation, at a maximum ambient of +85°C with no airflow, the junction temperature of the ADS5463 reaches approximately +85°C + 23.7°C/W × 2.2 W = +137°C and therefore the expected lifetime is approximately 8 years due to an electro migration failure and 18 years due to a wirebonding failure. Being even more conservative and accounting for the maximum possible power dissipation that is ensured (2.4 W), the junction temperature becomes nearly +142°C. As Figure 68 and Figure 69 show, this operating condition limits the expected lifetime of the ADS5463 even more. Operation at +85°C continuously may require airflow or an additional heatsink in order to decrease the internal junction temperature and increase the expected lifetime. An airflow of 250 LFM (linear feet per minute) reduces the thermal resistance to 16.4°C/W, the maximum junction temperature to +124°C and the expected lifetime to over 10 years, assuming a worst-case of 2.4 W and +85°C ambient. Of course, operation at lower ambient temperatures greatly increases the expected lifetime. The ADS5463/ADS54RF63 performance over temperature is quite good and can be seen starting in Figure 19. Although the typical plots show good performance at +100°C, the device is only rated from –40°C to +85°C. For continuous operation at temperatures near or above the maximum, aside from performance degradation, the expected primary negative effect is a shorter device lifetime. 100 Estimated Life − Years Estimated Life − Years 1k 100 10 1 80 90 100 110 120 130 140 150 160 170 180 TJ − Continuous Junction Temperature − °C Figure 68. Operating Life Derating Chart, Electro Migration Fail Mode 38 Submit Documentation Feedback G053 10 1 0.1 130 140 150 160 170 180 190 TJ − Continuous Junction Temperature − °C 200 G054 Figure 69. Operating Life Derating Chart, Wirebound Voiding Fail Mode Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 ADS5463 ADS54RF63 www.ti.com ................................................................................................................................................... SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 Layout Information The evaluation board represents a good guideline of how to lay out the board to obtain maximum performance from the ADS5463/ADS54RF63. General design rules, such as the use of multilayer boards, single ground plane for ADC ground connections, and local decoupling ceramic chip capacitors, should be applied. The input traces should be isolated from any external source of interference or noise, including the digital outputs as well as the clock traces. The clock signal traces should also be isolated from other signals, especially in applications where low jitter is required like high IF sampling. Besides performance-oriented rules, care must be taken when considering the heat dissipation of the device. The thermal heat sink should be soldered to the board as described in the PowerPAD Package section. See ADS5463 EVM User Guide (SLAU194) on the TI web site for the evaluation board schematic. PowerPAD Package The PowerPAD package is a thermally enhanced standard-size IC package designed to eliminate the use of bulky heatsinks and slugs traditionally used in thermal packages. This package can be easily mounted using standard printed circuit board (PCB) assembly techniques and can be removed and replaced using standard repair procedures. The PowerPAD package is designed so that the leadframe die pad (or thermal pad) is exposed on the bottom of the IC. This provides an extremely low thermal resistance path between the die and the exterior of the package. The thermal pad on the bottom of the IC can then be soldered directly to the printed circuit board (PCB), using the PCB as a heatsink. Assembly Process 1. Prepare the PCB top-side etch pattern including etch for the leads as well as the thermal pad as illustrated in the Mechanical Data section. 2. Place a 6-by-6 array of thermal vias in the thermal pad area. These holes should be 13 mils in diameter. The small size prevents wicking of the solder through the holes. 3. It is recommended to place a small number of 25-mil-diameter holes under the package, but outside the thermal pad area, to provide an additional heat path. 4. Connect all holes (both inside and outside the thermal pad area) to an internal copper plane (such as a ground plane). 5. Do not use the typical web or spoke via-connection pattern when connecting the thermal vias to the ground plane. The spoke pattern increases the thermal resistance to the ground plane. 6. The top-side solder mask should leave exposed the terminals of the package and the thermal pad area. 7. Cover the entire bottom side of the PowerPAD vias to prevent solder wicking. 8. Apply solder paste to the exposed thermal pad area and all of the package terminals. For more detailed information regarding the PowerPAD package and its thermal properties, see either the PowerPAD Made Easy application brief (SLMA004) or the PowerPAD Thermally Enhanced Package application report (SLMA002). Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 Submit Documentation Feedback 39 ADS5463 ADS54RF63 SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 ................................................................................................................................................... www.ti.com DEFINITION OF SPECIFICATIONS Analog Bandwidth The analog input frequency at which the power of the fundamental is reduced by 3 dB with respect to the low-frequency value Aperture Delay The delay in time between the rising edge of the input sampling clock and the actual time at which the sampling occurs Aperture Uncertainty (Jitter) The sample-to-sample variation in aperture delay Clock Pulse Duration/Duty Cycle The duty cycle of a clock signal is the ratio of the time the clock signal remains at a logic high (clock pulse duration) to the period of the clock signal, expressed as a percentage. Differential Nonlinearity (DNL) An ideal ADC exhibits code transitions at analog input values spaced exactly 1 LSB apart. DNL is the deviation of any single step from this ideal value, measured in units of LSB. Common-Mode Rejection Ratio (CMRR) CMRR measures the ability to reject signals that are presented to both analog inputs simultaneously. The injected common-mode frequency level is translated into dBFS, the spur in the output FFT is measured in dBFS, and the difference is the CMRR in dB. Effective Number of Bits (ENOB) ENOB is a measure in units of bits of a converter's performance as compared to the theoretical limit based on quantization noise ENOB = (SINAD – 1.76)/6.02 Gain Error Gain error is the deviation of the ADC actual input full-scale range from its ideal value, given as a percentage of the ideal input full-scale range. PSRR is a measure of the ability to reject frequencies present on the power supply. The injected frequency level is translated into dBFS, the spur in the output FFT is measured in dBFS, and the difference is the PSRR in dB. The measurement calibrates out the benefit of the board supply decoupling capacitors. Signal-to-Noise Ratio (SNR) SNR is the ratio of the power of the fundamental (PS) to the noise floor power (PN), excluding the power at dc and in the first five harmonics. P SNR + 10log 10 S PN (4) SNR is either given in units of dBc (dB to carrier) when the absolute power of the fundamental is used as the reference, or dBFS (dB to full scale) when the power of the fundamental is extrapolated to the converter’s full-scale range. Signal-to-Noise and Distortion (SINAD) SINAD is the ratio of the power of the fundamental (PS) to the power of all the other spectral components including noise (PN) and distortion (PD), but excluding dc. PS SINAD + 10log 10 PN ) PD (5) SINAD is either given in units of dBc (dB to carrier) when the absolute power of the fundamental is used as the reference, or dBFS (dB to full scale) when the power of the fundamental is extrapolated to the converter’s full-scale range. Temperature Drift Temperature drift (with respect to gain error and offset error) specifies the change from the value at the nominal temperature to the value at TMIN or TMAX. It is computed as the maximum variation the parameters over the whole temperature range divided by TMIN – TMAX. Integral Nonlinearity (INL) INL is the deviation of the ADC transfer function from a best-fit line determined by a least-squares curve fit of that transfer function. The INL at each analog input value is the difference between the actual transfer function and this best-fit line, measured in units of LSB. Total Harmonic Distortion (THD) THD is the ratio of the power of the fundamental (PS) to the power of the first five harmonics (PD). P THD + 10log 10 S PD (6) Offset Error Offset error is the deviation of output code from mid-code when both inputs are tied to common-mode. Two-Tone Intermodulation Distortion (IMD3) IMD3 is the ratio of the power of the fundamental (at frequencies f1, f2) to the power of the worst spectral component at either frequency 2f1 – f2 or 2f2 – f1). IMD3 is given in units of either dBc (dB to carrier) when the absolute power of the fundamental is used as the reference, or dBFS (dB to full scale) when the power of the fundamental is extrapolated to the converter’s full-scale range. Power-Supply Rejection Ratio (PSRR) 40 Submit Documentation Feedback THD is typically given in units of dBc (dB to carrier). Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 ADS5463 ADS54RF63 www.ti.com ................................................................................................................................................... SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 REVISION HISTORY Changes from Revision D (FEBRUARY 2009) to Revision E ......................................................................................... Page • • Added AC to High Analog Input Swing feature description ................................................................................................... 1 Changed clock and analog inputs and data outputs in ABSOLUTE MAXIMUM RATINGS table ......................................... 2 Copyright © 2006–2009, Texas Instruments Incorporated Product Folder Link(s): ADS5463 ADS54RF63 Submit Documentation Feedback 41 PACKAGE OPTION ADDENDUM www.ti.com 28-Oct-2016 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty 96 Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Green (RoHS & no Sb/Br) CU NIPDAU Level-4-260C-72 HR TBD Call TI Call TI Op Temp (°C) Device Marking (4/5) ADS5463IPFP ACTIVE HTQFP PFP 80 ADS5463I ADS5463IPFPG4 ACTIVE HTQFP PFP 80 ADS5463IPFPR ACTIVE HTQFP PFP 80 1000 Green (RoHS & no Sb/Br) CU NIPDAU Level-4-260C-72 HR ADS54RF63IPFP ACTIVE HTQFP PFP 80 96 Green (RoHS & no Sb/Br) CU NIPDAU Level-4-260C-72 HR -40 to 85 ADS54RF63I ADS54RF63IPFPR ACTIVE HTQFP PFP 80 1000 Green (RoHS & no Sb/Br) CU NIPDAU Level-4-260C-72 HR -40 to 85 ADS54RF63I ADS5463I (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 28-Oct-2016 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. 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OTHER QUALIFIED VERSIONS OF ADS5463 : • Enhanced Product: ADS5463-EP • Space: ADS5463-SP NOTE: Qualified Version Definitions: • Enhanced Product - Supports Defense, Aerospace and Medical Applications • Space - Radiation tolerant, ceramic packaging and qualified for use in Space-based application Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant ADS5463IPFPR HTQFP PFP 80 1000 330.0 24.4 15.0 15.0 1.5 20.0 24.0 Q2 ADS54RF63IPFPR HTQFP PFP 80 1000 330.0 24.4 15.0 15.0 1.5 20.0 24.0 Q2 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) ADS5463IPFPR HTQFP PFP 80 1000 367.0 367.0 45.0 ADS54RF63IPFPR HTQFP PFP 80 1000 367.0 367.0 45.0 Pack Materials-Page 2 www.ti.com IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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