AD9057-PCB

AD9057BRS-80 AD | Alldatasheet

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REV. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a AD9057 Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2001 8-Bit

40 MSPS/50 MSPS/80 MSPS Converter

ADCT/H 8 D7–D0 ENCODE AIN VREF OUT BIAS OUT VD PWRDN V DD AD9057 VREF IN +2.5V 1k/H9024 GND PRODUCT DESCRIPTION The AD9057 is an 8-bit monolithic analog-to-digital converter optimized for low cost, low power, small size, and ease of use. With a 40 MSPS, 60 MSPS, or 80 MSPS encode rates capabil- ity and full-power analog bandwidth of 120 MHz, the component is ideal for applications requiring excellent dynamic performance. To minimize system cost and power dissipation, the AD9057 includes an internal 2.5 V reference and a track-and-hold circuit. The user must provide only a 5 V power supply and an encode clock. No external reference or driver components are required for many applications. The AD9057’s encode input is TTL/CMOS compatible and the 8-bit digital outputs can be operated from 5 V or 3 V supplies. A power-down function may be exercised to bring total consump- tion to < 10 mW. In power-down mode the digital outputs are driven to a high impedance state. Fabricated on an advanced BiCMOS process, the AD9057 is available in a space saving 20-lead surface mount plastic pack- age (20 SSOP) and is specified over the i ndustrial (–40°C to +85°C) temperature range. Customers desiring multichannel digitization may consider the AD9059, a dual 8-bit, 60 MSPS monolithic based on the AD9057 ADC core. The AD9059 is available in a 28-lead sur- face mount plastic package (28 SSOP) and is specified over the industrial temperature range.

FEATURES

8-Bit, Low Power ADC: 200 mW Typical

120 MHz Analog Bandwidth

On-Chip 2.5 V Reference and T/H

1 V p-p Analog Input Range

Single 5 V Supply Operation

5 V or 3 V Logic Interface

Power-Down Mode: < 10 mW Three Performance Grades (40 MSPS, 60 MSPS, 80 MSPS)

APPLICATIONS

Digital Communications (QAM Demodulators) RGB and YC/Composite Video Processing Digital Data Storage Read Channels Medical Imaging Digital Instrumentation PIN CONFIGURATION TOP VIEW (Not to Scale) PWRDN D0 (LSB) VREF OUT VREF IN GND AD9057 V DD GNDVD BIAS OUT AIN VD GND ENCODE D7 (MSB)

REV. C–2– AD9057–SPECIFICATIONS(VD = 5 V, VDD = 3 V; external reference, unless otherwise noted.) Test AD9057BRS-40 AD9057BRS-60 AD9057BRS-80 Parameter Temp Level Min Typ Max Min Typ Max Min Typ Max Unit RESOLUTION 8 8 8 Bits DC ACCURACY Full VI 2.0 2.0 2.0 LSB Full VI 2.0 2.0 2.0 LSB No Missing Codes Full VI GUARANTEED GUARANTEED GUARANTEED Gain Error1 25°C I –6 –2.5 +6 –6 –2.5 +6 –6 –2.5 +6 % FS F u l l V I – 8+ 8 – 8+ 8 – 8+ 8 % F S Gain Tempco1 Full V ±70 ±70 ±70 ppm/ °C ANALOG INPUT Input Voltage Range (Centered at 2.5 V) 25 °C V 1.0 1.0 1.0 V p-p Input Offset Voltage 25 °C I –15 ±0 +15 –15 ±0 +15 –15 ±0 +15 mV Full VI –25 +25 –25 +25 –25 +25 mV Input Resistance 25 °C V 150 150 150 k Ω Input Capacitance 25 °C V 222 p F Input Bias Current 25 °C I 61 6 61 6 61 6 µA F u l l V I 2 52 52 5 µA Analog Bandwidth 25 °C V 120 120 120 MHz BANDGAP REFERENCE Temperature Coefficient Full V ±10 ±10 ±10 ppm/ °C SWITCHING PERFORMANCE Maximum Conversion Rate Full VI 40 60 80 MSPS Minimum Conversion Rate Full IV 5 5 5 MSPS Aperture Delay (t A)2 5 °C V 2.7 2.7 2.7 ns Aperture Uncertainty (Jitter) 25 °C V 5 5 5 ps, rms DYNAMIC PERFORMANCE 3 Transient Response 25 °C V 999 n s Overvoltage Recovery Time 25 °C V 999 n s Signal-to-Noise Ratio (SINAD) (With Harmonics) fIN = 10.3 MHz 25 °C I 42 45.5 42 45 41.5 45 dB fIN = 76 MHz 25 °C V 44.0 43.5 43.5 dB Effective Number of Bits fIN = 76 MHz 25 °C V 7.0 6.9 6.9 Bits Signal-to-Noise Ratio (SNR) (Without Harmonics) fIN = 10.3 MHz 25 °C I 43 46.5 43 46 42.5 46 dB fIN = 76 MHz 25 °C V 45.5 45 45 dB 2nd Harmonic Distortion fIN = 10.3 MHz 25 °C I –50 –62 –50 –62 –50 –62 dBc fIN = 76 MHz 25 °C V –54 –54 –54 dBc 3rd Harmonic Distortion fIN = 10.3 MHz 25 °C I –46 –60 –46 –60 –46 –60 dBc fIN = 76 MHz 25 °C V –54 –54 –54 dBc Two Tone Intermodulation Distortion (IMD) 25 °C V –52 –52 –52 dBc Differential Phase 25 °C V 0.8 0.8 0.8 Degrees Differential Gain 25 °C V 1.0 1.0 1.0 % DIGITAL INPUTS Logic “1” Voltage Full VI 2.0 2.0 2.0 V Logic “0” Voltage Full VI 0.8 0.8 0.8 V Logic “1” Current Full VI ±1 ±1 ±1 µA Logic “0” Current Full VI ±1 ±1 ±1 µA Input Capacitance 25 °C V 4.5 4.5 4.5 pF Encode Pulsewidth High (t EH)2 5 °C IV 9.0 166 6.7 166 5.5 166 ns Encode Pulsewidth Low (t EL)2 5 °C IV 9.0 166 6.7 166 5.5 166 ns

1Gain error and gain temperature coefficient are based on the ADC only (with a fixed 2.5 V external reference). an ac load of 10 pF or a dc current of ±40 µA. 3SNR/harmonics based on an analog input voltage of –0.5 dBFS referenced to a 1.0 V full-scale input range. 4Digital supply current based on V DD = 3 V output drive with <10 pF loading under dynamic test conditions. 5Power dissipation is based on specified encode and 10.3 MHz analog input dynamic test conditions (V D = 5 V ±5%, VDD = 3 V ± 5%). 6Typical thermal impedance for the RS style (SSOP) 20-lead package: θJC = 46°C/W, θCA = 80°C/W, θJA = 126°C/W. Specifications subject to change without notice. Figure 1. Timing Diagram

REV. C AD9057 –4– CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD9057 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. WARNING! ESD SENSITIVE DEVICE ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE Temperature Model Range Package Option* AD9057BRS–40, –60, –80 –40 °C to +85°C RS-20 AD9057/PCB 25 °C Evaluation Board *RS = Shrink Small Outline (SSOP). Table I. Digital Coding (VREF = 2.5 V) Analog Input Voltage Level Digital Output

3.0 V Positive Full Scale 1111 1111

2.502 V Midscale +1/2 LSB 1000 0000

2.498 V Midscale –1/2 LSB 0111 1111

2.0 V Negative Full Scale 0000 0000

Pin No. Mnemonic Function

1 PWRDN Power-Down Function Select;

Mode (Digital Outputs Go to High Impedance State).

2 VREF OUT Internal Reference Output

(2.5 V typ); Bypass with 0.1 µF to Ground. 3 VREF IN Reference Input for ADC (2.5 V typ, ±10%) 4, 9, 16 GND Ground (Analog/Digital) 5, 8 V D Analog 5 V Power Supply

6 BIAS OUT Bias Pin for AC Coupling

(1 kΩ to REF IN)

7 AIN Analog Input for ADC

10 ENCODE Encode Clock for ADC (ADC

ENCODE) 11–14, 17–20 D7–D4, D3–D0 Digital Outputs of ADC

15 V DD Digital Output Power Supply;

Nominally 3 V to 5 V. PIN CONFIGURATION TOP VIEW (Not to Scale) PWRDN D0 (LSB) VREF OUT VREF IN GND AD9057 VDD GNDVD BIAS OUT AIN VD GND ENCODE D7 (MSB)

REV. C –5– Typical Performance Characteristics– AD9057 –10 –9003 0 dB–50 –60 –70 –80 –30 –40 –20 ENCODE = 60MSPS ANALOG IN = 10.3MHz, –0.5dBFS SINAD = 46.1dB ENOB = 7.36 BITS SNR = 46.5dB FREQUENCY – MHz TPC 1. Spectral Plot 60 MSPS, 10.3 MHz –10 –90 03 0 dB –50 –60 –70 –80 –30 –40 –20 FREQUENCY – MHz ENCODE = 60MSPS ANALOG IN = 76MHz, –0.5dBFS SINAD = 44.9dB ENOB = 7.16 BITS SNR = 45.2dB TPC 2. Spectral Plot 60 MSPS, 76 MHz ANALOG INPUT FREQUENCY – MHz dB 0 160 20 40 60 80 100 120 140 ENCODE = 60MSPS AIN = –0.5dBFS SNR SINAD TPC 3. SINAD/SNR vs. AIN Frequency ANALOG INPUT FREQUENCY – MHz dB –30 –70 0 160 20 40 60 80 100 120 140 –35 –50 –55 –60 –65 –40 –45 ENCODE = 60MSPS AIN = –0.5dBFS 3RD HARMONIC 2ND HARMONIC TPC 4. Harmonic Distortion vs. AIN Frequency FREQUENCY – MHz dB –10 –90 03 0 10 20 –50 –60 –70 –80 –30 –40 –20 ENCODE = 60MSPS F1 IN = 9.5MHz @ –7.0dBFS F2 IN = 9.9MHz @ –7.0dBFS 2F1 - F2 = –52.0dBc 2F2 - F1 = –53.0dBc TPC 5. Two-Tone Intermodulation Distortion ENCODE RATE – MSPS 5 1 0 2 03 04 05 06 07 08 09 0 AIN = 10.3MHz, –0.5dBFS SNR SINAD dB TPC 6. SINAD/SNR vs. Encode Rate

REV. C AD9057 –6– ENCODE RATE – MSPS mW 350 150 5 1 0 2 03 04 05 06 07 08 0 9 0 300 250 100 200 VDD = 5V VDD = 3V AIN = 10.3MHz, –0.5dBFS TPC 7. Power Dissipation vs. Encode Rate TEMPERATURE – C 46.5dB 46.0 41.5–45 90 02 57 0 44.5 43.0 42.5 42.0 45.5 45.0 43.5 44.0 SNR SINAD ENCODE = 60MSPS AIN = 10.3MHz, –0.5dBFS TPC 8. SINAD/SNR vs. Temperature TEMPERATURE – C GAIN ERROR – % –0.2 –1.8–45 90 02 5 7 0 –0.8 –1.2 –1.4 –1.6 –0.4 –0.6 –1.0 TPC 9. ADC Gain vs. Temperature (with External

2.5 V Reference)

TEMPERATURE – C 10.0tPD – ns 9.5 –45 90 02 57 0 8.0 6.5 6.0 9.0 8.5 7.0 7.5 VDD = 5V VDD = 3V 11.0 12.0 TPC 10. t PD vs. Temperature/Supply (V DD = 3 V/5 V) ENCODE HIGH PULSEWIDTH – ns dB 46.5 42.5 5.8 9.2 8.35 45.0 44.0 43.5 43.0 46.0 45.5 44.5 SINAD SNR ENCODE = 60MSPS AIN = 10.3MHz, –05dBFS 10.0 10.96.7 7.5 43.5 TPC 11. SINAD/SNR vs. Encode PulsewidthADC GAIN – dB –10 1 10 100 2 5 20 50 200 500 ENCODE = 60MSPS AIN = –0.5dBFS ANALOG FREQUENCY – MHz TPC 12. ADC Frequency Response

connect E8 to E9 (ground to PWRDN). user at connector Pins 2 and 21. Figure 6. Equivalent Circuits

Figure 7. Evaluation Board Schematic

Figure 8. Evaluation Board Layout

REV. C–12– C00561b –0–9/01(C) PRINTED IN U.S.A. AD9057 OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 20-Lead SSOP (RS-20) 20 11 101 0.295 (7.50) 0.271 (6.90) 0.311 (7.9) 0.301 (7.64) 0.212 (5.38) 0.205 (5.21) PIN 1 SEATING PLANE 0.008 (0.203) 0.002 (0.050) 0.07 (1.78) 0.066 (1.67) 0.0256 (0.65) BSC 0.078 (1.98) 0.068 (1.73) 0.009 (0.229) 0.005 (0.127) 0.037 (0.94) 0.022 (0.559) 8/H11543 0/H11543

Revision History

Data Sheet changed from REV. B to REV. C.