Analog Devices Inc. AD876JRS

Overview

AD876JRS from Analog Devices is a 10-bit, 20 MSPS CMOS analog-to-digital converter (ADC) with on-chip sample-and-hold, differential nonlinearity of ±0.5 LSB, guaranteed no missing codes, and 160 mW power dissipation at +5 V single supply. It operates over 0°C to +70°C and targets high-speed imaging and video digitization systems requiring precise timing and low-power conversion.

For engineers reviewing the AD876JRS datasheet, AD876JRS pinout, AD876JRS application, or AD876JRS equivalent, this page delivers verified specifications, SSOP-28 package mapping, force-sense reference interface details, pipeline latency (3.5 clock cycles), and real-world trade-offs versus 8-bit variants and drop-in alternatives in CCD input chains.

Technical Context

The AD876JRS implements a multistage pipelined architecture with output error correction logic to achieve 10-bit accuracy at 20 MSPS while guaranteeing no missing codes across its full commercial temperature range. Its internal sample-and-hold amplifier supports differential input ranges up to 2 V p-p with adjustable reference top/bottom voltages (1.6 V to 4.5 V).

It features three-state digital outputs compatible with +3.3 V or +5 V logic, standby mode reducing power below 50 mW, and dedicated DRVDD/DRVSS supplies for independent digital I/O voltage control. Force-sense reference inputs (REFTF/REFTS/REFBF/REFBS) minimize voltage drop errors in high-precision applications.

Key Specifications

Pinout & Package

AD876JRS is packaged in a 28-lead SSOP (RS-28), measuring 10.2 mm × 5.3 mm × 1.95 mm, with 0.65 mm lead pitch and exposed thermal pad (not electrically connected). Pin 1 is marked by a dot; pins are numbered counterclockwise from the index mark.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9203ARUZ and ADS830E, the AD876JRS uniquely balances 10-bit fidelity, SSOP-28 footprint, force-sense reference integrity, and standby power control-making it optimal for space-constrained, battery-aware imaging systems where reference accuracy and layout simplicity outweigh raw speed or lowest power.

Availability

AD876JRS is available at Aetrix Electronics and suitable for color scanner front-ends, digital copier image paths, and electronic still camera preview subsystems requiring stable component supply, long-term BOM continuity, and commercial-temperature performance consistency.

Supply support for AD876JRS 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 digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.

The AD876JRS belongs to Analog Devices' high-speed data acquisition product line, designed specifically for imaging, video, and communications systems demanding 10-bit resolution at 20 MSPS with minimal power and layout complexity.

FAQ

What is the operating temperature range specified for the AD876JRS?

The AD876JRS is rated for the commercial temperature range of 0°C to +70°C, as confirmed in the Ordering Guide section of the official datasheet. This specification applies to all electrical parameters including INL (±1.0 LSB), DNL (±1 LSB), and SINAD (≥46 dB at 3.58 MHz), measured with AVDD = +5.0 V, DVDD = +5.0 V, DRVDD = +3.3 V, and fCLOCK = 20 MSPS. Operation outside this range may result in unguaranteed performance or reliability degradation.

Does the AD876JRS support both +3.3 V and +5 V logic levels on its digital I/O pins?

Yes, the AD876JRS supports both +3.3 V and +5 V logic levels through its dedicated DRVDD supply pin. When DRVDD is set to +3.3 V, the digital input thresholds become ~1.65 V (VIH min = 2.4 V, VIL max = 0.6 V), and outputs swing to compatible CMOS levels. At DRVDD = +5 V, inputs accept standard TTL/CMOS thresholds (VIH min = 4.0 V, VIL max = 1.0 V), and outputs drive +5 V logic families directly. This dual-voltage capability is intrinsic to the AD876JRS design and does not require external level shifters.

How does the force-sense reference architecture of the AD876JRS improve measurement accuracy?

The AD876JRS uses separate force (REFTF/REFBF) and sense (REFTS/REFBS) pins to eliminate voltage drop errors caused by PCB trace resistance and internal bond wire impedance. By routing the reference current through REFTF/REFBF while sensing the actual voltage at the internal DAC ladder via REFTS/REFBS, the AD876JRS achieves <0.5 LSB INL stability even with 5 Ω of series resistance. This architecture directly improves DC accuracy and reduces temperature-induced drift compared to single-point reference connections.

What is the pipeline latency of the AD876JRS, and how does it affect system timing?

The AD876JRS has a fixed pipeline latency of 3.5 clock cycles, meaning the digital output corresponding to a given analog sample appears 3.5 CLK periods after that sample is acquired. This deterministic delay is critical for time-critical feedback loops and synchronous data capture. For example, at 20 MSPS (50 ns period), the latency equals 175 ns-enabling precise alignment with FPGA-based frame buffers or DSP trigger events without additional FIFO compensation.

Can the AD876JRS be used in battery-powered portable applications?

Yes, the AD876JRS is explicitly optimized for battery-powered portable applications. Its 160 mW typical power consumption at 20 MSPS and standby mode (reducing power to <50 mW) enable extended operation in electronic still cameras and camcorders. The +5 V single-supply operation eliminates need for dual-rail regulators, and the SSOP-28 package minimizes PCB area. Analog Devices highlights its suitability for "electronic still cameras, camcorders and communication systems" in the Product Highlights section.