NXP Semiconductors ADC0808S125HW/C1,1

Overview

ADC0808S125HW/C1 from NXP Semiconductors is a differential, high-speed 8-bit analog-to-digital converter optimized for telecommunication transmission control and tape drive systems. It supports 125 MHz sampling rate, 560 MHz analog input bandwidth, and operates with 1.8 V CMOS or LVDS clock inputs in an HTQFP48 package.

For engineers reviewing the ADC0808S125HW/C1 datasheet, ADC0808S125HW/C1 pinout, ADC0808S125HW/C1 application, or ADC0808S125HW/C1 equivalent, key selection criteria include its programmable complete conversion signal (CCS), dual-clock interface mode support, differential input architecture, low-latency 2-cycle timing, and industrial temperature range (−40 °C to +85 °C).

Technical Context

The ADC0808S125HW/C1 implements a track-and-hold front-end followed by an ADC core with resistor ladder architecture. Its programmable CCS output-controlled via DEL0/DEL1 and CCSSEL pins-delivers adjustable delay (0.3 ns to 1.9 ns) and selectable frequency (f_clk or f_clk/2), enabling precise data capture synchronization in high-speed digital interfaces.

Dual clock input modes are hardware-selectable via CLKSEL: LVDS mode requires external 80–120 Ω termination across CLK+/CLK−, while 1.8 V CMOS mode uses CLK+ only (CLK− grounded). Analog input full-scale is configurable via internal regulator (0.95 V CMADC, 2.0 V p-p) or external reference (1.15–1.35 V on FSIN/REFSEL), supporting flexible signal chain design.

Key Specifications

Pinout & Package

ADC0808S125HW/C1 is supplied in an HTQFP48 plastic thermal enhanced thin quad flat package (SOT545-2), 7 × 7 × 1 mm body with exposed die pad for improved thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed ADC applications.

Compared with ADC0808S250HW/C1, the ADC0808S125HW/C1 offers lower power and thermal footprint at 125 MHz, while AD9288BSTZ-125 provides dual-channel capability but requires redesign for pin compatibility and lacks CCS-driven timing flexibility.

Availability

ADC0808S125HW/C1 is available at Aetrix Electronics and suitable for 2.5G/3G base station radio transceivers, optical networking equipment, and tape drive channel electronics requiring stable component supply and long-term industrial-grade availability.

Supply support for ADC0808S125HW/C1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and communications markets.

The ADC0808S product line was designed for high-speed signal acquisition in telecom infrastructure, delivering differential input precision, flexible clocking, and programmable timing control for RF and storage applications.

FAQ

What is the maximum analog input frequency supported by the ADC0808S125HW/C1?

The ADC0808S125HW/C1 supports a maximum analog input frequency of 560 MHz at −3 dB bandwidth. This specification is measured under full-scale sine-wave input conditions with 125 MHz sampling and reflects the device's ability to accurately reconstruct high-frequency signals without significant amplitude roll-off. The 560 MHz bandwidth enables use in IF sampling applications for cellular base stations and optical receivers. This value is confirmed in Table 13 of the official NXP datasheet.

Does the ADC0808S125HW/C1 support both binary and 2's complement output formats?

Yes, the ADC0808S125HW/C1 supports both binary and 2's complement output coding. Selection is controlled by the OTC and CE_N pins per Table 6 in the datasheet: OTC = LOW and CE_N = LOW yields binary output, while OTC = HIGH and CE_N = LOW selects 2's complement. When CE_N is HIGH, all outputs enter high-impedance state regardless of OTC. This dual-format capability allows seamless integration with DSPs and FPGAs requiring signed arithmetic.

How is the complete conversion signal (CCS) configured on the ADC0808S125HW/C1?

The CCS output on the ADC0808S125HW/C1 is configured using three control pins: CCSSEL sets frequency (f_clk or f_clk/2), while DEL0 and DEL1 select one of three discrete delay values (0.3 ns, 0.8 ns, or 1.9 ns) relative to the sampling clock edge. These settings allow precise alignment of the CCS strobe with stable data windows on the D0–D7 bus. The CCS pin remains high-impedance when both DEL0 and DEL1 are LOW, as specified in Table 7.

What are the supply voltage requirements for the ADC0808S125HW/C1?

The ADC0808S125HW/C1 requires three independent supply domains: VCCA = 3.0–3.6 V (typical 3.3 V) for the analog section, VCCD = 1.65–1.95 V (typical 1.8 V) for digital logic, and VCCO = 1.65–1.95 V (typical 1.8 V) for the parallel output drivers. All grounds (AGND1, AGND2, DGND1, OGND1–4) must be shorted together per Table 12. Exceeding these ranges violates Absolute Maximum Ratings and may cause permanent damage.

Can the ADC0808S125HW/C1 operate with an external reference voltage?

Yes, the ADC0808S125HW/C1 supports external reference configuration via the FSIN/REFSEL pin. Applying 1.15–1.35 V to this pin disables the internal 0.95 V regulator and enables external full-scale control, allowing adjustment of peak-to-peak input range from 1.825 V to 2.16 V per Table 9. The internal regulator remains active only when FSIN/REFSEL is grounded. This flexibility accommodates varying front-end gain stages without redesigning the reference network.