Analog Devices Inc. AD21489WBCPZ4202

Overview

AD21489WBCPZ4202 from Analog Devices is a quad-channel, 16-bit, 1 GSPS digital-to-analog converter optimized for direct-conversion wireless transmit architectures. It delivers 80 dBc W-CDMA ACLR at 150 MHz IF, supports 8.7–31.7 mA programmable full-scale output current into 25–50 Ω loads, and integrates on-chip fine complex NCO, digital inverse sinc filtering, and I/Q gain/phase/offset compensation. It interfaces directly with quadrature modulators including ADL5371–ADL5375.

For engineers reviewing the AD21489WBCPZ4202 datasheet, AD21489WBCPZ4202 pinout, AD21489WBCPZ4202 application, or AD21489WBCPZ4202 equivalent, this device is selected for high-dynamic-range RF signal synthesis in multi-carrier, MIMO, and wideband infrastructure transceivers where channel isolation >90 dB, low IMD, and deterministic latency (e.g., 254 cycles at 4× interpolation) are critical.

Technical Context

The AD21489WBCPZ4202 implements four independent 16-bit current-steering DAC cores fed by dual LVDS data ports (A/B), each supporting up to 1200 MSPS interface rate. Its digital datapath includes configurable 2×/4×/8× interpolation filters, programmable inverse sinc compensation, and fine modulation via a 32-bit NCO enabling carrier placement anywhere within the DAC bandwidth.

It features a high-performance PLL clock multiplier (2×–16×), multiple-chip synchronization capability via REFCLK/SYNC pins, and auxiliary DACs for per-channel offset control. Power delivery is segmented across AVDD33 (3.3 V), CVDD18 (1.8 V), DVDD18 (1.8 V), and IOVDD (1.8–3.3 V), with total consumption of 2.47 W at 800 MSPS DAC rate with NCO and PLL enabled.

Key Specifications

Pinout & Package

AD21489WBCPZ4202 is housed in a 196-ball CSP_BGA package (12 mm × 12 mm) with optional integrated heat spreader (BGA_ED variant). Pin assignment follows standard Analog Devices BGA layout with segregated analog (AVDD33/AVSS), clock (CLK_P/N, REFCLK_P/N), digital (A[15:0]_P/N, B[15:0]_P/N), and auxiliary (AUX1–AUX4, IOUT1–IOUT4) domains.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel, high-speed DAC applications.

Compared with AD9144BCPZ and AD9162BCPZ, AD21489WBCPZ4202 provides integrated PLL, auxiliary DACs, and deterministic multi-device sync-making it optimal for cost-sensitive, thermally constrained 4T4R wireless infrastructure where 1 GSPS and on-chip calibration are prioritized over raw speed or JESD204B scalability.

Availability

AD21489WBCPZ4202 is available at Aetrix Electronics and suitable for wireless infrastructure, MIMO radio units, digital IF synthesis, and wideband test equipment requiring stable component supply across long production lifecycles.

Supply support for AD21489WBCPZ4202 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, headquartered in Norwood, MA.

The AD9148 product line-of which AD21489WBCPZ4202 is a qualified variant-is designed specifically for high-dynamic-range, multi-channel wireless transmit signal chains in 4G/5G basestations and broadband communications infrastructure.

FAQ

What is the maximum DAC sample rate supported by AD21489WBCPZ4202?

AD21489WBCPZ4202 supports a maximum DAC sample rate of 1000 MSPS. This is confirmed in the General Description and AC Specifications sections of the AD9148 datasheet (Rev. B), where it states "quad, 16-bit, high dynamic range, digital-to-analog converter (DAC) that provides a sample rate of 1000 MSPS." The device maintains full performance-including SFDR ≥65 dBc and ACLR ≥−81 dBc-at this rate under specified conditions (e.g., fOUT = 100 MHz, PLL off).

Does AD21489WBCPZ4202 include an integrated PLL?

Yes, AD21489WBCPZ4202 includes a high-performance, low-noise PLL clock multiplier supporting multiplication factors from 2× to 16×. As documented in the Features and Clock Generation sections, this PLL accepts reference clocks from 15.625 MSPS to 500 MSPS and generates the internal DAC clock. Its use improves spectral purity but slightly degrades ACLR (e.g., −78 dBc vs. −81 dBc at 737.28 MSPS), a trade-off explicitly quantified in Table 5.

How many LVDS data input ports does AD21489WBCPZ4202 have, and what are their configurations?

AD21489WBCPZ4202 has two independent LVDS data input ports: Port A (A[15:0]_P/N) and Port B (B[15:0]_P/N), each 16-bit wide. These support dual-port mode (620 MSPS per port), single-port mode (1200 MSPS aggregate), or byte-mode operation. Frame and clock pairs (FRAMEA/B, DCIA/B) accompany each port. Pin descriptions in Table 10 and Figure 5 confirm dedicated A/B port routing and biasing requirements.

What is the purpose of the auxiliary DACs in AD21489WBCPZ4202?

The auxiliary DACs (AUX1–AUX4) in AD21489WBCPZ4202 provide independent, programmable DC offset correction for each of the four main DAC channels. As stated in the Features and Analog Outputs sections, they output differential current (e.g., AUX1_P/N) that can be summed into the main DAC output path to null static I/Q imbalance. This enables per-channel calibration without altering the primary digital datapath or requiring external op-amps.

Is AD21489WBCPZ4202 pin-compatible with other members of the AD9148 family?

Yes, AD21489WBCPZ4202 is a qualified variant of the AD9148 family and shares identical pinout, package (196-ball CSP_BGA), and electrical interface with AD9148BCPZ and AD9148WBCPZ. The Pin Configurations section (Pages 11–14) confirms uniform ball mapping across all AD9148 variants, including identical assignments for IOUTx, AUXx, CLK, REFCLK, and SPI signals-enabling drop-in replacement in existing AD9148-based designs.