Analog Devices Inc. AD9218BSTZ-RL65

Overview

AD9218BSTZ-RL65 from Analog Devices is a dual 10-bit, 65 MSPS analog-to-digital converter with on-chip track-and-hold and internal reference, operating from a single 3.0 V supply (2.7–3.6 V), delivering 57 dB SNR at 41 MHz input with 300 MHz analog bandwidth per channel, used in I/Q communications and ultrasound equipment.

For engineers reviewing the AD9218BSTZ-RL65 datasheet, AD9218BSTZ-RL65 pinout, AD9218BSTZ-RL65 application, or AD9218BSTZ-RL65 equivalent, this page provides verified specifications, validated pin functions, confirmed dual-channel timing behavior, real-world crosstalk performance (–75 dBc), and precise power-down and data alignment mode definitions - all specific to the 65 MSPS speed grade and LQFP-48 package.

Technical Context

The AD9218BSTZ-RL65 implements a bit-per-stage pipeline ADC architecture with differential analog inputs, independent channel operation, and five-cycle pipeline latency. Each channel features matched 300 MHz analog bandwidth, on-chip 1.24 V reference (REFOUT), and user-selectable twos complement or offset binary output coding.

It supports dual-clock or single-clock configurations via S1/S2 control pins, enabling either independent channel sampling or data-aligned output (with ½-cycle skew for Channel B). The ENCA/ENCB clock inputs are TTL/CMOS compatible, and digital outputs drive 3.3 V or 2.5 V logic via separate VDD supply pins.

Key Specifications

Pinout & Package

AD9218BSTZ-RL65 is housed in a 48-lead LQFP (7 mm × 7 mm), rated for –40°C to +85°C industrial operation. Pin assignments are validated per Analog Devices Rev. D datasheet Figure 5 and Table 8.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel ADC applications.

Compared with AD9288BSTZ-80, AD9218BSTZ-RL65 adds 2 bits of resolution and 8 dB SNR at identical speed - critical for medical imaging fidelity. Against ADS5272IPFP, it offers drop-in LQFP compatibility and integrated reference, reducing layout risk and component count despite lower channel count.

Availability

AD9218BSTZ-RL65 is available at Aetrix Electronics and suitable for I/Q communications receivers, portable ultrasound systems, low-cost digital oscilloscopes, and battery-powered scopemeters requiring stable component supply across industrial temperature ranges.

Supply support for AD9218BSTZ-RL65 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 industrial, automotive, communications, and healthcare markets since 1965.

The AD9218 product line delivers dual-channel, medium-speed ADCs optimized for direct IF sampling and real-time signal capture in space-constrained, power-sensitive systems - with the AD9218BSTZ-RL65 specifically targeting 65 MSPS applications needing 2 V p-p input range and industrial temperature operation.

FAQ

What is the exact analog input voltage range supported by AD9218BSTZ-RL65?

The AD9218BSTZ-RL65 supports a 2 V p-p differential analog input range when the DFS/GAIN pin is left floating or tied to VREF. This is confirmed in the Rev. D datasheet Table 1 (DC Specifications) and Figure 16 (FFT plot at 65 MSPS with 2 V p-p input). The 1 V p-p range applies only to other speed grades (40/80/105 MSPS) unless explicitly configured otherwise.

Does AD9218BSTZ-RL65 require an external reference voltage?

No, AD9218BSTZ-RL65 does not require an external reference. It integrates a 1.24 V internal reference (REFOUT) that can directly drive REFINA and REFINB pins, as specified in the General Description and Voltage Reference section of the Rev. D datasheet. External reference is optional for precision calibration but not necessary for standard operation.

How is channel synchronization achieved in AD9218BSTZ-RL65?

AD9218BSTZ-RL65 achieves channel synchronization via independent ENCA and ENCB clock inputs or through the data alignment mode (S1=1, S2=1), which delays Channel B output by ½ clock cycle to align with ENCA's rising edge. This is documented in Table 7 (User Select Modes) and Figure 4 (Data Align timing diagram) of the Rev. D datasheet.

What is the power consumption of AD9218BSTZ-RL65 in single-channel power-down mode?

In single-channel power-down mode (S1=0, S2=1), AD9218BSTZ-RL65 draws 22 mA from the VD supply (IVD), per Table 1 (DC Specifications, "IVD Power-Down Current" row). Total power drops to ~66 mW for the active channel, as confirmed by the 275 mW/channel spec and measured IVDD/IVD values in the same table.

Is AD9218BSTZ-RL65 pin-compatible with AD9288BSTZ-80?

Yes, AD9218BSTZ-RL65 is pin-compatible with the 8-bit AD9288BSTZ-80, as stated in the Product Highlights and Pin Configuration sections of the Rev. D datasheet. Both use identical 48-lead LQFP packaging and share functionally mapped pins (e.g., AINA/AINA, ENCA/ENCB, D0A–D9A, etc.), enabling hardware reuse in migration paths.