Analog Devices Inc. ADA4950-2YCPZ-RL

Overview

ADA4950-2YCPZ-RL from Analog Devices is a dual, low-power, gain-selectable differential ADC driver IC with configurable gains of 1, 2, or 3; delivers 750 MHz −3 dB bandwidth (G = 1, ±5 V), 2900 V/µs slew rate, and 108 dB SFDR at 10 MHz - optimized for high-speed data acquisition systems driving precision ADCs in communications and instrumentation.

For engineers reviewing the ADA4950-2YCPZ-RL datasheet, ADA4950-2YCPZ-RL pinout, ADA4950-2YCPZ-RL application, or ADA4950-2YCPZ-RL equivalent, key selection criteria include differential gain configuration flexibility, VOCM-adjustable output common-mode voltage, low 9.5 mA per amplifier quiescent current, and 24-lead LFCSP package thermal performance for high-density PCB layouts.

Technical Context

The ADA4950-2YCPZ-RL integrates on-chip feedback and gain resistors to support precise G = 1/2/3 configurations without external resistor networks. Its internal common-mode feedback loop enables user-defined VOCM setting and ensures exceptional output balance (−62 dB error) and even-order harmonic suppression.

Fabricated in Analog Devices' SiGe complementary bipolar process, it achieves low distortion (−98 dBc HD2 @ 20 MHz) and low input-referred voltage noise (9.2 nV/√Hz) while operating from ±5 V or single 5 V supplies across −40°C to +105°C.

Key Specifications

Pinout & Package

ADA4950-2YCPZ-RL uses a Pb-free, 4 mm × 4 mm, 24-lead LFCSP package with exposed paddle (EPAD) requiring soldering to ground or power plane for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar differential ADC driver applications.

Compared with ADA4940-2ACPZ-R7, ADA4950-2YCPZ-RL trades 4.5 mA for 9.5 mA to gain 250 MHz bandwidth and integrated gain selection; versus THS4561IRHFT, it sacrifices 1.05 GHz bandwidth to achieve 4.0 mA lower I_Q and on-chip VOCM control - optimizing for power-sensitive, precision IF/ADC interface applications.

Availability

ADA4950-2YCPZ-RL is available at Aetrix Electronics and suitable for high-speed data acquisition, communications infrastructure, and test equipment requiring stable component supply, extended temperature operation, and consistent LFCSP package availability.

Supply support for ADA4950-2YCPZ-RL 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADA4950 family targets high-speed, low-power differential signal conditioning for precision data converters - designed specifically to simplify ADC interface design while maintaining dynamic performance across industrial and communications environments.

FAQ

What gain configurations does the ADA4950-2YCPZ-RL support, and how are they selected?

The ADA4950-2YCPZ-RL supports differential gains of 1, 2, and 3 using its internal resistor network. Gain is selected by tying specific input pins: for G = 1, use only +INA1/−INA1; for G = 2, use +INB1/−INB1; for G = 3, tie +INA1 to +INB1 and −INA1 to −INB1. The same applies to Channel 2. No external resistors are needed - this is confirmed in the Functional Block Diagram and Pin Function Descriptions of the Rev. B datasheet.

Does the ADA4950-2YCPZ-RL require external components to set output common-mode voltage?

No - the ADA4950-2YCPZ-RL features dedicated VOCM1 and VOCM2 pins that accept a DC or AC-coupled voltage to directly define the output common-mode level. This internal common-mode feedback loop eliminates the need for external resistive dividers or op-amp buffers, and is validated across ±5 V and 5 V single-supply operation per Tables 2 and 5 in the datasheet.

What is the thermal performance of the ADA4950-2YCPZ-RL in its 24-lead LFCSP package?

The ADA4950-2YCPZ-RL in 24-lead LFCSP has θ_JA = 65°C/W and θ_JC = 16°C/W when mounted on a JEDEC 4-layer board with the exposed paddle soldered to a solid plane. This allows safe dissipation of up to ~2.5 W at 25°C ambient (per Figure 4), supporting continuous high-current operation without derating in compact layouts.

How does the power-down feature of the ADA4950-2YCPZ-RL operate, and what are its timing specs?

The ADA4950-2YCPZ-RL provides independent PD1 and PD2 pins per channel. Driving PDx ≤(+VS − 2.5 V) disables the amplifier (I_Q drops to ~0.9 mA); ≥(+VS − 1.8 V) enables it (I_Q = 9.5 mA). Turn-off time is 600 ns; turn-on time is 28 ns. These values are measured and specified in Table 3 and Table 6 of the Rev. B datasheet under ±5 V and 5 V operation.

Can the ADA4950-2YCPZ-RL drive a 200 Ω differential load while maintaining 0.1 dB flatness?

Yes - the ADA4950-2YCPZ-RL achieves 230 MHz 0.1 dB flatness into 200 Ω differential load at G = 1 (±5 V), as explicitly stated in Table 1. This is verified in Figure 19 and supports high-fidelity signal delivery to ADCs with 100 Ω input termination (e.g., AD9643), minimizing frequency-dependent amplitude error across IF bands.