ADA4950-2YCPZ Dual Differential ADC Driver: Complete Technical Guide, Specs, and Alternatives

The ADA4950-2YCPZ is a dual, gain-selectable differential amplifier from Analog Devices engineered as a high-performance ADC driver. Its verified headline specs include a -3 dB bandwidth of 1.35 GHz at gain = 1, a slew rate of 2900 V/µs, and an input voltage noise of just 2.2 nV/√Hz, with on-chip feedback and gain resistors enabling fixed gains of 1, 2, and 3 without any external components. It runs from a single 3.3 V to 11 V supply or dual ±1.65 V to ±5.5 V supplies, draws 9.5 mA per amplifier, and comes in a compact 24-lead LFCSP (4x4 mm) package. As of 2026-09-12, the part is in stock at XAIPART with 99,999 units available, priced at $8.58 for a single unit and $4.95 at 1,000+ units, with MOQ 1. Lifecycle status is active. See the ADA4950-2YCPZ product page for full specifications and ordering options.

What Is the ADA4950-2YCPZ and Why Do Engineers Choose It?

The ADA4950-2YCPZ is the dual-channel member of the ADA4950 family, which also includes the single ADA4950-1. Fabricated on Analog Devices' proprietary silicon-germanium (SiGe) complementary bipolar process, it achieves low distortion and low noise at low power. A differential amplifier amplifies the difference between two input voltages while rejecting common-mode signals, which is exactly the interface high-performance ADCs require. The ADA4950-2 converts single-ended signals to differential or buffers differential signals, providing drive strength and level shifting for ADC inputs.

The defining feature is integration: on-chip feedback and gain resistors deliver fixed gains of 1, 2, and 3, selected via the G0 (pin 11) and G1 (pin 10) pins. This eliminates external resistor networks, cutting board space, component count, and gain-matching errors. Additional verified specifications include a 0.5 mV typical input offset voltage, 2 µA typical input bias current, 60 mA typical output current, and a power-down mode that reduces supply current from 9.5 mA per amplifier to 0.3 mA.

How Do You Design In the ADA4950-2YCPZ? A Practical Technical Guide

Designing with the ADA4950-2YCPZ starts with the supply. The device accepts a single supply from 3.3 V to 11 V (tie V-, pin 8, to ground) or dual supplies from ±1.65 V to ±5.5 V. Total quiescent current is typically 19 mA for both channels (2 x 9.5 mA), so a 5 V rail yields roughly 95 mW of quiescent dissipation per device — easily managed by the exposed pad soldered to a ground plane, which is required for optimal thermal and electrical performance.

Gain selection. Drive the G0 and G1 pins to select among the on-chip gain settings of 1, 2, and 3. Because feedback and gain resistors are internal, no external gain network is needed, and bandwidth decreases at higher gain settings while remaining sufficient for most ADC driving tasks, per the datasheet.

Common-mode control. The VOCM pin (pin 3) sets the output common-mode voltage. Connect it to your ADC's common-mode reference output so the differential outputs (OUT+, pin 1; OUT-, pin 2) center correctly within the ADC's input range. Always verify the input common-mode voltage range and output swing against the ADC's requirements before finalizing the design.

Single-ended-to-differential conversion. The ADA4950-2YCPZ converts a single-ended input into a differential output connected directly to the ADC inputs, reducing common-mode noise along the way.

Power-down. The PD pin (pin 9) is active high. Assert it to drop supply current from 9.5 mA to 0.3 mA per amplifier — valuable in duty-cycled systems such as ultrasound probes and radar modules.

Layout. Use proper power-supply decoupling and careful PCB layout to achieve the specified 1.35 GHz bandwidth and 2.2 nV/√Hz noise performance. The 4x4 mm LFCSP is compact but demands attention to the ground return path beneath the exposed pad. [VERIFY_NEEDED: recommended decoupling capacitor values per datasheet layout section]

Operating environment. The part is rated from -40°C to +105°C and is RoHS compliant and surface-mount.

What Are the Best Alternatives to the ADA4950-2YCPZ?

The verified drop-in and near-drop-in alternatives are packaging variants of the same die and two pin-compatible family members:

Choose the RL, R7, or R2 variants for volume production with reel packaging. Choose the ADA4932-2YCPZ when you need a custom gain set by external resistors — it is pin-compatible with the ADA4950-2 but does not include the on-chip gain resistors. The ADA4930-2YCPZ offers a slightly higher 1.4 GHz bandwidth with different gain options. The THS4509 is a cross-brand differential amplifier with a different pinout, so verify compatibility before substituting.

What Is the Market Position and Supply Situation for the ADA4950-2YCPZ?

The ADA4950-2YCPZ carries an active lifecycle status in the XAIPART database. Supply is strong: as of 2026-09-12, XAIPART lists 99,999 units in stock with an MOQ of 1. Pricing as of 2026-09-12 is $8.58 at qty 1, $7.72 at qty 10, $6.23 at qty 100, $5.50 at qty 500, and $4.95 at qty 1,000 or more — a 42% unit-cost reduction from single-piece to the 1,000-piece tier. The manufacturer datasheet is the ADA4950-1/ADA4950-2 datasheet (Rev. B), available from Analog Devices. [DATA_NEEDED: long-term lifecycle forecast / last-time-buy date]

What Should Buyers Watch Next for High-Speed ADC Drivers?

Anchor your sourcing decisions to the verified numbers. The ADA4950-2YCPZ's combination of 1.35 GHz bandwidth, 2900 V/µs slew rate, 2.2 nV/√Hz noise, and integrated gain resistors keeps it competitive for driving high-speed ADCs in software-defined radios, radar, communications infrastructure, medical imaging, and test equipment. Watch three things: first, the tiered pricing — the jump from $8.58 to $4.95 per unit makes consolidating orders past 1,000 pieces highly economical; second, reel-packaging variants (RL, R7, R2) for production lines that require tape-and-reel feeders; third, the power-down feature (0.3 mA) and the -40°C to +105°C range, which matter increasingly in battery-powered and thermally constrained designs. When evaluating substitutes, the pin-compatible ADA4932-2YCPZ trades the integrated gain resistors for external flexibility, while the ADA4930-2YCPZ offers 1.4 GHz bandwidth with different gain options. Start with the ADA4950-2YCPZ product page, browse the Amplifier ICs category, or review the tape-and-reel RL variant for production volumes.