Analog Devices Inc. 131191-HMC960LP4E

Overview

HMC960LP4E from Analog Devices is a dual-channel digitally programmable variable gain amplifier (VGA) for baseband I/Q signal processing, delivering 0–40 dB gain in precise 0.5 dB steps, 6 dB noise figure at 100 Ω input, +30 dBm output IP3, and DC–100 MHz bandwidth - deployed as an ADC driver in direct-conversion transceivers.

For engineers reviewing the HMC960LP4E datasheet, HMC960LP4E pinout, HMC960LP4E application, or HMC960LP4E equivalent, key selection criteria include quadrature channel balance (±0.02 dB gain / ±0.15° phase error), externally adjustable output common-mode voltage, SPI/parallel gain control interface, and 400 Ω or 100 Ω programmable differential input impedance.

Technical Context

The HMC960LP4E implements a three-stage gain architecture with input match/gain stage, resistor-ratio-based second stage (0.5 dB step precision), and differential class-AB output driver with 0/10 dB selectable gain. Gain decoding logic optimizes noise figure by allocating gain across stages based on setting.

It supports two bias configurations: standard (op-amp bias '01', driver bias '01') and high-linearity (driver bias '10'), enabling trade-offs between OIP3 (+32 to +33 dBm) and power consumption (70 mA total supply current). Common-mode output level is set via dedicated CMI/CMQ pins, independent of gain state.

Key Specifications

Pinout & Package

Package: 24-lead 4 mm × 4 mm LFCSP (CP-24-16), RoHS-compliant, exposed thermal paddle, MSL1, 0.85 mm height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC900LP5E and ADL5330ACPZ-R7, the HMC960LP4E uniquely combines dual-channel matching, programmable input impedance, independent common-mode control, and 0.5 dB gain resolution - making it irreplaceable for precision baseband I/Q signal chains demanding >55 dB sideband rejection.

Availability

HMC960LP4E is available at Aetrix Electronics and suitable for baseband ADC driver, direct-conversion transceiver, diversity receiver, and adaptive gain control applications requiring stable component supply and long-term production continuity.

Supply support for HMC960LP4E 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, communications, and industrial systems.

The HMC960LP4E belongs to Analog Devices' High Frequency division RF & Microwave product line, engineered specifically for high-fidelity I/Q baseband signal conditioning in wireless infrastructure and test equipment.

FAQ

What is the maximum operating frequency and bandwidth specification for the HMC960LP4E?

The HMC960LP4E supports DC to 100 MHz signal bandwidth (3 dB point) across its full 0–40 dB gain range. Its 0.5 dB bandwidth exceeds 50 MHz, and it maintains excellent I/Q channel balance up to 100 MHz - verified in datasheet Figures 5 and 6. This makes the HMC960LP4E suitable for wideband baseband applications including LTE, WiMAX, and broadband test equipment where flat group delay and minimal phase distortion are essential. The HMC960LP4E does not operate at RF or IF frequencies above 100 MHz.

Does the HMC960LP4E support both SPI and parallel gain control simultaneously?

No - the HMC960LP4E uses register bit [5] in Settings Register (Reg 02h) to select the active gain source: '0' enables parallel port (GC[6:0]), '1' enables SPI-controlled gain from Register 03h. Both interfaces cannot be active concurrently. When SPI is selected, the GC pins are ignored; when parallel is selected, SPI writes to Reg 03h have no effect on gain. The HMC960LP4E must be configured at startup or runtime via this register to avoid undefined behavior.

What input impedance options does the HMC960LP4E provide, and how are they configured?

The HMC960LP4E offers two differential input impedance options: 100 Ω and 400 Ω. Configuration is performed via bit [4] (Rin_50ohm_select) in Settings Register (Reg 02h): '0' selects 200 Ω per side (400 Ω differential), '1' selects 50 Ω per side (100 Ω differential). This setting applies identically to both I and Q channels and persists across power cycles. The HMC960LP4E does not support dynamic reconfiguration of input impedance during operation - it is a static setup parameter.

How does the HMC960LP4E achieve its specified 0.5 dB gain step accuracy?

The HMC960LP4E achieves ±0.2 dB gain step accuracy (typical) through a resistor-ratio-based second gain stage, where gain increments are determined by precisely trimmed on-chip resistors rather than switched transistor arrays. This architecture minimizes temperature and process variation effects. Combined with gain decoding logic that optimally allocates gain across three internal stages, the HMC960LP4E maintains ±0.05 dB typical step error and ±0.2 dB absolute gain error at 40 MHz - as validated in Table 1 and Figures 2 and 4 of the datasheet.

Can the HMC960LP4E drive ADCs directly without external components?

Yes - the HMC960LP4E is designed as a direct ADC driver. Its differential outputs deliver up to 2 Vppd into 400 Ω loads and 1 Vppd into 100 Ω loads, matching common ADC input requirements. With externally set common-mode voltages (via CMI/CMQ pins) and programmable input impedance, the HMC960LP4E eliminates need for AC-coupling capacitors, level-shifters, or termination resistors in most implementations. The datasheet confirms successful interfacing with the HMCAD1520 ADC without additional circuitry.