Analog Devices Inc. AD9861BCP-80

Overview

AD9861BCP-80 from Analog Devices is a mixed-signal front-end (MxFE™) baseband transceiver integrating dual 10-bit ADCs (80 MSPS max), dual 10-bit TxDACs (200 MSPS), programmable PLL, and 20-bit flexible I/O interface - optimized for broadband access modems and LAN infrastructure requiring high dynamic range and low power at 80 MSPS sampling.

For engineers reviewing the AD9861BCP-80 datasheet, AD9861BCP-80 pinout, AD9861BCP-80 application, or AD9861BCP-80 equivalent, key selection considerations include its 80 MSPS Rx sample rate capability, 200 MSPS Tx DAC update rate with 4× interpolation, 64-lead LFCSP package, independent Rx/Tx power-down control, and auxiliary converter support for system monitoring.

Technical Context

The AD9861BCP-80 implements a fully integrated analog front-end with separate, independently controllable receive and transmit paths. Its ADC path supports 80 MSPS sampling with 59.5 dB SINAD (typ) and 67 dBc SFDR (wideband), while the TxDAC path delivers 60.7 dB SINAD (typ) and –115 dBc/Hz phase noise at 1 kHz offset.

Internal clock distribution uses a programmable PLL fed by a single CLKIN to generate ADC and DAC clocks; timing generation supports user-selectable divide ratios and interpolation modes (1×/2×/4×), with latency of 5 ADC clock cycles (Rx) and up to 83 DAC clock cycles (Tx, 4× mode).

Key Specifications

Pinout & Package

The AD9861BCP-80 is housed in a 64-lead LFCSP (9 mm × 9 mm, 0.9 mm height) with exposed thermal pad requiring solid ground connection per datasheet Figure 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar mixed-signal front-end applications.

Compared with AD9862BCPZ-50 and AD9865BCPZ, the AD9861BCP-80 uniquely combines 80 MSPS ADC performance, on-chip PLL, and three auxiliary converters - making it the only option among the three that meets full DOCSIS 3.0 and WiMAX baseband requirements in a single chip.

Availability

AD9861BCP-80 is available at Aetrix Electronics and suitable for broadband access modems, wireless baseband units, and PCMCIA communication cards requiring stable component supply across extended temperature ranges (–40°C to +85°C) and long product lifecycles.

Supply support for AD9861BCP-80 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and DSP technologies, serving communications, industrial, and automotive markets with precision signal processing solutions.

The AD9861 belongs to the MxFE™ (Mixed-Signal Front-End) family, designed specifically for broadband communications infrastructure - delivering integrated ADC/DAC, clocking, and interface logic to reduce system size, power, and development time in DSL, cable, and wireless access equipment.

FAQ

What is the maximum ADC sampling rate supported by the AD9861BCP-80?

The AD9861BCP-80 supports a maximum ADC sampling rate of 80 MSPS, as confirmed in Table 2 of the Rev. A datasheet. This distinguishes it from the -50 variant (50 MSPS max) and enables high-bandwidth applications such as DOCSIS 3.0 downstream reception and WiMAX baseband processing. The AD9861BCP-80 achieves 59.5 dB SINAD (typ) at this rate with 10 MHz input.

Does the AD9861BCP-80 include an integrated PLL?

Yes, the AD9861BCP-80 includes an integrated programmable PLL within its clock distribution block, allowing all internal clocks (ADC, DAC, digital interface) to be derived from a single CLKIN reference. This eliminates the need for external clock synthesizers and is explicitly documented in the General Description and Clock Distribution Block sections of the datasheet. The AD9861BCP-80 PLL supports output frequencies up to 350 MHz.

How many auxiliary converters does the AD9861BCP-80 provide, and what are their configurations?

The AD9861BCP-80 provides three auxiliary converter pins (AUX1, AUX2, AUX3), each configurable as either an auxiliary ADC input or auxiliary DAC output per Table 8 and Functional Block Diagram. These support system-level functions like supply voltage monitoring or bias control without external components. All three are accessible in the 64-lead LFCSP package and are documented in the Auxiliary Converters section (page 27) of the datasheet.

What power-down modes are available for the AD9861BCP-80's analog sections?

The AD9861BCP-80 offers independent analog power-down control via dedicated RxPwrDwn and TxPwrDwn pins. In power-down mode, the Rx path draws 5 mA and the Tx path draws 2 mA (Table 3). Additionally, the ADC supports low-power and ultralow-power modes - e.g., 82 mA at 40 MSPS and 35 mA at 20 MSPS - all verified in the Power Specifications section of the Rev. A datasheet.

What package type and dimensions does the AD9861BCP-80 use?

The AD9861BCP-80 uses a 64-lead LFCSP (low-profile, fine-pitch chip-scale package) with a 9 mm × 9 mm footprint and maximum height of 0.9 mm, as specified in the Outline Dimensions section (page 49) and Pin Configuration diagram (Figure 3). The exposed thermal pad must be securely connected to the ground plane per datasheet note on page 8. This package enables high-density placement in space-constrained applications like PCMCIA cards.