Analog Devices Inc. ADM660ARUZ

Overview

ADM660ARUZ from Analog Devices is a CMOS switched-capacitor voltage converter that inverts or doubles a +1.5 V to +7 V input supply, delivering up to 100 mA output current with ≤0.3 V dropout at 30 mA load and 600 µA quiescent current. It supports selectable 25 kHz/120 kHz charge-pump frequency and operates in industrial temperature range (–40°C to +85°C), commonly used in op amp dual-rail power supplies and portable instrumentation.

For engineers reviewing the ADM660ARUZ datasheet, ADM660ARUZ pinout, ADM660ARUZ application, or ADM660ARUZ equivalent, key selection criteria include inverting/doubling mode support, TSSOP-16 package compatibility, FC-controlled frequency selection, and absence of shutdown functionality compared to ADM8660 variants.

Technical Context

The ADM660ARUZ implements a two-phase switched-capacitor topology using internal MOSFET switches driven by an on-chip oscillator. Its FC pin selects between 25 kHz and 120 kHz charge-pump operation, directly affecting external capacitor sizing (10 µF vs. 2.2 µF) and output impedance. The OSC pin enables external clock control or capacitor-tuned frequency adjustment, while LV pin configures low-voltage operation below 3.5 V.

In inverting mode, it generates –VIN from +1.5 V to +7 V input; in doubling mode (exclusive to ADM660), it delivers 2×VIN for inputs from +2.5 V to +7 V. Output resistance is specified at 9 Ω to 15 Ω (100 mA load), and efficiency exceeds 90% at light loads, dropping to ≥81.5% at full 100 mA output.

Key Specifications

Pinout & Package

ADM660ARUZ is housed in a 16-lead Thin Shrink Small Outline Package (TSSOP, RU-16), compliant with JEDEC MO-153-AB, with 0.65 mm lead pitch and 5.00 mm × 4.40 mm body dimensions. Thermal impedance θ_JA = 158°C/W; power dissipation rated at 500 mW (derated above +50°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage inverter applications.

Compared with MAX660CPA+ and ICL7660CBAZ, ADM660ARUZ offers higher output current (100 mA vs. 20–10 mA), selectable frequency, external oscillator capability, and modern TSSOP-16 packaging-making it suitable for new designs requiring scalability, efficiency, and layout flexibility.

Availability

ADM660ARUZ is available at Aetrix Electronics and suitable for handheld instruments, op amp power supplies, and remote data acquisition systems requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for ADM660ARUZ 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, serving industrial, automotive, communications, and healthcare markets.

The ADM660ARUZ belongs to Analog Devices' switched-capacitor voltage converter product line, designed specifically for compact, efficient rail-splitting and voltage inversion in space-constrained, low-noise analog systems.

FAQ

What voltage conversion modes does the ADM660ARUZ support?

The ADM660ARUZ supports both inverting (V_OUT = –V_IN) and doubling (V_OUT = 2×V_IN) modes. Inversion works across +1.5 V to +7 V input; doubling requires +2.5 V to +7 V input and LV pin connected to OUT. Unlike ADM8660, ADM660ARUZ lacks shutdown functionality but retains OSC pin for external frequency control - a key differentiator confirmed in Analog Devices' official ADM660/ADM8660 datasheet Rev. C.

What is the function of the LV pin on the ADM660ARUZ?

The LV (Low Voltage) pin on the ADM660ARUZ configures internal regulator behavior: grounding LV enables stable operation down to +1.5 V input by bypassing the regulator, while leaving it open or grounded for inputs ≥+3.5 V maintains compatibility with legacy ICL7660 designs. This pin has no effect in doubling mode, where LV must be tied to OUT. All configurations are validated in the ADM660/ADM8660 datasheet's Pin Function Descriptions section.

Can the ADM660ARUZ operate with a 1.5 V input supply?

Yes, the ADM660ARUZ can operate with a +1.5 V input supply in inverting mode when the LV pin is grounded, as explicitly specified in the Absolute Maximum Ratings and General Description sections of the ADM660/ADM8660 datasheet Rev. C. At this voltage, output is –1.5 V (±10%), with reduced efficiency and output current capability. Performance curves in TPC 3 and TPC 6 confirm functional operation down to 1.5 V, though 2.5 V minimum is recommended for doubling mode.

What external capacitors are required for the ADM660ARUZ?

The ADM660ARUZ requires two low-ESR electrolytic capacitors: C1 (flying capacitor) and C2 (output filter). For 25 kHz operation (FC open), 10 µF capacitors are recommended; for 120 kHz (FC = V+), 2.2 µF suffices. Both must have ESR <0.2 Ω per datasheet Table III and Typical Performance Characteristics. Ceramic capacitors are unsuitable due to insufficient capacitance and voltage rating limitations.

Is the ADM660ARUZ pin-compatible with the MAX660?

Yes, the ADM660ARUZ is explicitly documented as a pin-compatible upgrade for the MAX660 in the ADM660/ADM8660 datasheet Rev. C Feature list and Ordering Guide. However, this applies only to the 8-lead SOIC (R-8) and PDIP (N-8) versions of MAX660. The ADM660ARUZ uses a 16-lead TSSOP (RU-16) package with NC pins; direct drop-in replacement requires PCB redesign unless using adapter footprints or socket solutions.