ADC0808S250HW/C1 Product Information

Overview

The ADC0808S250HW/C1 is a high-speed, 8-bit Analog-to-Digital Converter (ADC) optimized for telecommunication transmission control systems and tape drive applications. It supports a sampling frequency of up to 250 MHz, making it suitable for demanding applications requiring high-speed data acquisition.

Key Features

• 8-bit Resolution: Provides precise digital representation of analog signals.
• High-Speed Sampling: Supports sampling rates up to 250 MHz.
• Maximum Analog Input Frequency: Up to 560 MHz.
• Programmable Acquisition Output Clock: Allows adjustment of acquisition clock delay and frequency.
• Differential Analog Input: Enhances signal integrity and noise rejection.
• Integrated Voltage Regulator: For analog input full-scale control or external reference.
• Selectable Clock Input: Supports 1.8 V CMOS or LVDS clock inputs.
• 1.8 V CMOS Digital Outputs: Compatible with modern digital systems.
• Binary or 2’s Complement Outputs: Offers flexibility in data representation.
• Low Latency: Only 2 clock cycles.
• Industrial Temperature Range: -40 °C to +85 °C.
• HTQFP48 Package: Suitable for high-density PCB layouts.

Applications

• 2.5G and 3G Cellular Base Infrastructure Radio Transceivers: Ideal for high-speed data conversion in communication systems.
• Wireless Access Systems: Enhances performance in wireless networking applications.
• Fixed Telecommunications: Provides reliable data conversion for fixed-line systems.
• Optical Networking: Supports high-speed data transmission in optical networks.
• Wireless Local Area Network (WLAN) Infrastructure: Enhances data acquisition in WLAN systems.
• Tape Drive Applications: Ensures accurate data conversion for tape storage systems.

Ordering Information

• Type Number: ADC0808S250HW/C1
• Sampling Frequency: 250 MHz
• Package: HTQFP48
• Description: Plastic thermally enhanced thin quad flat package with 48 leads

Pinning Information

Pin Configuration

• OGND1: Data output ground 1
• D3: Data output bit 3
• VCCO1(1V8): Data output supply voltage 1 (1.8 V)
• D4: Data output bit 4
• OGND2: Data output ground 2
• D5: Data output bit 5
• VCCO2(1V8): Data output supply voltage 2 (1.8 V)
• D6: Data output bit 6
• VCCO3(1V8): Data output supply voltage 3 (1.8 V)
• D7: Data output bit 7
• CCS: Complete conversion signal output
• CE_N: Chip enable input (active LOW)
• IR: In-range output
• OTC: Control input for 2’s complement output
• DGND1: Digital ground 1
• VCCD1(1V8): Digital supply voltage 1 (1.8 V)
• CCSSEL: Control input for CCS frequency selection
• NC1V8: Not connected or connected to VCCD1(1V8)
• AGND1: Analog ground 1
• CMADC: Regulator common-mode ADC output
• FSIN/REFSEL: Full-scale reference voltage input/internal reference selection
• AGND2: Analog ground 2
• INN: Complementary analog input
• IN: Analog input
• VCCA1(3V3): Analog supply voltage 1 (3.3 V)
• CLKSEL: Control input for clock input selection
• CLK+: Clock input
• CLK−: Complementary clock input
• DEL0: Complete conversion signal delay input 0
• DEL1: Complete conversion signal delay input 1
• D0: Data output bit 0
• VCCO4(1V8): Data output supply voltage 4 (1.8 V)
• D1: Data output bit 1
• D2: Data output bit 2
• DGND: Digital ground; exposed die pad

Functional Description

CMOS/LVDS Clock Input

• LVDS Mode: Differential LVDS levels with an external resistor of 80 Ω to 120 Ω.
• 1.8 V CMOS Mode: Sampling on the rising edge of the clock input signal with CLK− grounded.

Digital Output Coding

• Output Formats: Binary or 2’s complement.
• Output Levels: 1.8 V CMOS compatible.

Timing Output

• Output Delay: Up to 6.9 ns for LVDS clock input.
• Output Hold Time: 3.3 ns to 4.8 ns for LVDS clock input.

Complete Conversion Signal

• Adjustable CCS Signal: Controlled by DEL0 and DEL1 for optimal data acquisition timing.

Full-Scale Input Selection

• Internal Reference: Enabled by connecting FSIN to ground, providing a common-mode output voltage of 0.95 V.
• External Reference: Allows adjustment of the ADC input range with an external reference voltage applied to FSIN.

Limiting Values

• Analog Supply Voltage (VCCA): -0.5 V to +4.6 V
• Digital Supply Voltage (VCCD): -0.5 V to +2.5 V
• Output Supply Voltage (VCCO): -0.5 V to +2.5 V
• Input Voltage (Vi(IN), Vi(INN)): -0.5 V to VCCA + 1 V
• Clock Input Voltage (Vi(CLK)): -0.5 V to VCCD + 0.55 V
• Storage Temperature (Tstg): -55 °C to +150 °C
• Ambient Temperature (Tamb): -40 °C to +85 °C
• Junction Temperature (Tj): - to 150 °C

Thermal Characteristics

• Thermal Resistance (Rth(j-a)): 36.2 K/W
• Thermal Resistance (Rth(j-c)): 14.3 K/W

Static Characteristics

• Analog Supply Current (ICCA): Up to 60 mA at 125 MHz
• Digital Supply Current (ICCD): Up to 12 mA at 125 MHz
• Output Supply Current (ICCO): Up to 11 mA at 125 MHz
• Total Power Dissipation (Ptot): Up to 240 mW at 125 MHz

Dynamic Characteristics

• Clock Frequency (fclk): 1 MHz to 250 MHz
• Output Delay Time (td(o)): 5.4 ns to 7.3 ns for 1.8 V CMOS clock input
• Output Hold Time (th(o)): 3.3 ns to 4.8 ns for 1.8 V CMOS clock input
• Integral Non-Linearity (INL): ±0.82 LSB at 20 MHz clock frequency
• Differential Non-Linearity (DNL): ±0.4 LSB at 20 MHz clock frequency
• Offset Error (EO): ±2.5 mV at 25 °C ambient temperature
• Gain Error (EG): ±1.85% at 25 °C ambient temperature
• Bandwidth (B): Up to 560 MHz at -3 dB
• Total Harmonic Distortion (THD): -53 dB at 125 MHz clock frequency
• Signal-to-Noise Ratio (S/N): 47 dBc to 48 dBc at 125 MHz clock frequency
• Spurious Free Dynamic Range (SFDR): 55 dBc at 125 MHz clock frequency
• Intermodulation Distortion (IMD): -55 dB for second-order and -60 dB for third-order

Package Outline

• Package Type: HTQFP48
• Dimensions: Refer to the detailed package outline in the datasheet for exact dimensions.