Analog Devices Inc. AD7277BUJZ-REEL7

Overview

AD7277BUJZ-REEL7 from Analog Devices is a 10-bit, 3.45 MSPS successive approximation ADC in a 6-lead TSOT package, operating from 2.35 V to 3.6 V supply. It delivers 60.5 dB SINAD at 1 MHz input, 74 MHz full-power bandwidth, and 0.1 μA power-down current, enabling high-speed data acquisition in space-constrained industrial sensor interfaces and portable instrumentation.

For engineers reviewing the AD7277BUJZ-REEL7 datasheet, AD7277BUJZ-REEL7 pinout, AD7277BUJZ-REEL7 application, or AD7277BUJZ-REEL7 equivalent, key selection criteria include its 10-bit resolution with ±0.5 LSB INL/DNL, SPI-compatible serial interface with no pipeline delay, and operation across −40°C to +125°C for rugged embedded measurement systems.

Technical Context

The AD7277BUJZ-REEL7 implements a track-and-hold amplifier with 60 ns acquisition time and aperture jitter of 18 ps, supporting accurate sampling of signals up to 74 MHz (−3 dB). Its conversion is initiated by the falling edge of CS and completed in 12 SCLK cycles (250 ns max at 48 MHz), with output data formatted as two leading zeros, 10-bit result (MSB first), and four trailing zeros.

Reference is derived internally from VDD, establishing a 0 V to VDD analog input range. Power management includes partial and full power-down modes, achieving 34 μA and 2 μA static current respectively, while maintaining SPI/QSPI/MICROWIRE/DSP compatibility without requiring external reference or clock conditioning circuitry.

Key Specifications

Pinout & Package

AD7277BUJZ-REEL7 uses a 6-lead TSOT package (2.9 mm × 1.6 mm × 0.8 mm) with exposed pad for thermal enhancement and standard surface-mount reflow compatibility.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit high-speed ADC applications.

Compared with AD7277BUJZ-REEL7, AD7477ARTZ-REEL7 trades throughput for SNR headroom, while ADS8320EB/250 adds resolution at the cost of external reference dependency and reduced speed-making AD7277BUJZ-REEL7 optimal for compact, high-speed, self-contained acquisition nodes.

Availability

AD7277BUJZ-REEL7 is available at Aetrix Electronics and suitable for industrial motor control, portable medical instrumentation, automotive sensor interface, and process monitoring applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7277BUJZ-REEL7 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, serving industrial, automotive, communications, and healthcare markets.

The AD7277BUJZ-REEL7 belongs to the AD727x family of ultrafast, low-power SAR ADCs designed specifically for space-constrained, high-throughput data acquisition in harsh-environment embedded systems.

FAQ

What is the maximum sampling rate supported by the AD7277BUJZ-REEL7?

The AD7277BUJZ-REEL7 achieves a maximum throughput rate of 3.45 MSPS when operated with a 48 MHz SCLK. This is enabled by its 12 SCLK-cycle conversion time and absence of pipeline delay, allowing deterministic sampling for time-critical control loops and real-time signal analysis applications requiring sub-microsecond timing resolution.

Does the AD7277BUJZ-REEL7 require an external voltage reference?

No, the AD7277BUJZ-REEL7 uses an internal reference derived from the VDD supply, establishing a 0 V to VDD analog input range. This eliminates the need for external reference components, simplifying design, reducing PCB area, and lowering system cost-particularly valuable in compact, battery-operated, or cost-sensitive applications where reference stability is less critical than integration and power efficiency.

What are the power consumption characteristics of the AD7277BUJZ-REEL7 in active and power-down modes?

In normal operational mode at 3 V and 3.45 MSPS, the AD7277BUJZ-REEL7 consumes 10.5 mW typical. In full power-down mode, it draws only 0.1 μA typical-reducing standby power to nanowatt levels. These characteristics make AD7277BUJZ-REEL7 well-suited for duty-cycled systems such as portable data loggers, wireless sensors, and energy-harvesting devices where minimizing quiescent current is essential for extended battery life.

Is the AD7277BUJZ-REEL7 compatible with standard microcontroller SPI interfaces?

Yes, the AD7277BUJZ-REEL7 features a native SPI-compatible serial interface that operates with standard CPOL = 0, CPHA = 0 timing and supports QSPI, MICROWIRE, and DSP protocols. Its SDATA output is three-state and synchronized to the falling edge of SCLK, enabling direct connection to most ARM Cortex-M, PIC, and RISC-V microcontrollers without additional level shifters or glue logic.

What is the analog input bandwidth and dynamic performance of the AD7277BUJZ-REEL7 at 1 MHz input frequency?

At a 1 MHz sine wave input, the AD7277BUJZ-REEL7 delivers 60.5 dB minimum SINAD, −71 dB maximum THD, and 74 MHz full-power bandwidth (−3 dB point). These specifications confirm its capability to accurately digitize medium-frequency signals with high fidelity, making it suitable for applications including motor current sensing, ultrasound receive paths, and RF envelope detection where harmonic distortion and bandwidth limitations must be tightly controlled.