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, 1.8 V CMOS/LVDS clock inputs, and operates across −40 °C to +85 °C. Its programmable Complete Conversion Signal (CCS) enables precise acquisition timing control in RF receiver front-ends.

For engineers reviewing the ADC0808S125HW/C1 datasheet, ADC0808S125HW/C1 pinout, ADC0808S125HW/C1 application, or ADC0808S125HW/C1 equivalent, key selection considerations include its HTQFP48 package, dual-clock interface mode selection (LVDS vs. 1.8 V CMOS), CCS delay configurability via DEL0/DEL1, binary/2's complement output coding, and full-scale reference flexibility via FSIN/REFSEL.

Technical Context

The ADC0808S125HW/C1 implements a track-and-hold architecture with resistor ladder core and integrated voltage regulation for analog common-mode reference (CMADC = 0.95 V typical). Its dual-clock input path (CLK+/CLK−) supports either LVDS (825–1575 mV differential swing) or 1.8 V CMOS (rising-edge triggered) operation, selected by CLKSEL.

Timing is governed by a low-latency 2-cycle pipeline, with digital outputs (D0–D7, IR, CCS) driven at 1.8 V CMOS levels. The CCS output-programmable in frequency (f_clk or f_clk/2) and edge delay (0.3 ns to 1.9 ns)-synchronizes data capture in downstream logic, while OTC and CE_N jointly configure binary or 2's complement output coding.

Key Specifications

Pinout & Package

ADC0808S125HW/C1 is housed in an HTQFP48 (SOT545-2) thermally enhanced thin quad flat package: 7 mm × 7 mm × 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, ADC0808S125HW/C1 delivers identical feature set at lower power and cost for 125 MHz-limited systems; versus AD9203ARUZ, it provides 3× higher sampling rate, RF-optimized bandwidth, and advanced timing control essential for modern wireless infrastructure.

Availability

ADC0808S125HW/C1 is available at Aetrix Electronics and suitable for 2.5G/3G base station radio transceivers, optical networking line cards, and tape drive servo control systems 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 leader focused on secure connectivity solutions for automotive, industrial, and communication markets, with deep expertise in high-performance analog and mixed-signal ICs.

The ADC0808S product line was designed specifically for high-speed data acquisition in telecommunications infrastructure, emphasizing low-latency digitization, flexible clocking, and robust RF performance in compact packages.

FAQ

What is the maximum sampling frequency supported by the ADC0808S125HW/C1?

The ADC0808S125HW/C1 is rated for a maximum sampling frequency of 125 MHz, as confirmed in the ordering information table and dynamic characteristics section. This distinguishes it from the ADC0808S250HW/C1 variant, which supports up to 250 MHz. The 125 MHz limit applies under all operating conditions including full temperature range (−40 °C to +85 °C) and specified supply voltages.

Does the ADC0808S125HW/C1 support both LVDS and CMOS clock inputs?

Yes, the ADC0808S125HW/C1 supports both interfaces via pins CLK+ and CLK−. Clock mode is selected by the CLKSEL pin: LOW configures 1.8 V CMOS input (with CLK− grounded), while HIGH or open configures LVDS mode requiring an external 80–120 Ω termination resistor. This dual-mode capability is explicitly defined in Table 4 and Section 7.1 of the datasheet.

How is the Complete Conversion Signal (CCS) configured on the ADC0808S125HW/C1?

The CCS output on ADC0808S125HW/C1 is configured using three control pins: CCSSEL selects frequency (f_clk or f_clk/2), while DEL0 and DEL1 set edge delay (0.3 ns, 0.8 ns, or 1.9 ns). When both DEL pins are LOW, CCS is placed in high-impedance state. These configurations are fully documented in Tables 7 and 8 and Figure 6 of the datasheet.

What reference voltage options does the ADC0808S125HW/C1 provide for full-scale input?

The ADC0808S125HW/C1 supports both internal and external reference modes via the FSIN/REFSEL pin. Internal mode (FSIN grounded) yields 0.95 V common-mode and 2.0 V_p-p full-scale. External mode accepts 1.15–1.35 V reference, adjusting full-scale range per Table 9 - e.g., 1.25 V input yields 1.99 V_p-p max. This flexibility is critical for matching diverse signal chain gains.

What package type and thermal characteristics apply to the ADC0808S125HW/C1?

The ADC0808S125HW/C1 uses the HTQFP48 package (SOT545-2): 7 mm × 7 mm × 1 mm body with exposed die pad. Thermal resistance is R_th(j-a) = 36.2 K/W and R_th(j-c) = 14.3 K/W (JEDEC test board, free air), enabling reliable operation at 240 mW typical power dissipation across the industrial temperature range.