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Analog Devices Inc. ADM660ARZ
- Part No.:
- ADM660ARZ
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM660ARZ.pdf
- Description:
- IC REG CHRG PUMP INV 100MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,361
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Product details
Overview
ADM660ARZ from Analog Devices is a CMOS switched-capacitor voltage converter that inverts (+1.5 V to +7 V input → –1.5 V to –7 V output) or doubles (+2.5 V to +7 V input → +5 V to +14 V output) supply rails. It delivers up to 100 mA output current with ≤0.3 V dropout at 30 mA, 90–94% power efficiency, and selectable 25 kHz/120 kHz charge-pump frequency - used in op amp dual-rail supplies and portable instrumentation.
For engineers reviewing the ADM660ARZ datasheet, ADM660ARZ pinout, ADM660ARZ application, or ADM660ARZ equivalent, key selection criteria include inverting/doubling mode support, SOIC-8 package compatibility, shutdown absence (vs. ADM8660), external oscillator capability, and low-quiescent-current operation (600 µA typical).
Technical Context
The ADM660ARZ implements a two-phase switched-capacitor topology using internal MOSFET switches controlled by an on-chip oscillator. Its FC pin selects between 25 kHz (low IQ, 10 µF caps) and 120 kHz (lower impedance, 2.2 µF caps) charge-pump operation, while the OSC pin enables external clock or capacitor-based frequency tuning - enabling ripple and capacitor-size optimization.
Unlike the ADM8660, the ADM660ARZ supports voltage doubling via LV-to-OUT connection and external oscillator control, but lacks shutdown functionality. Its LV pin configures low-voltage operation (<3.5 V input requires LV = GND), and it maintains ≥90% efficiency across 1 mA–100 mA loads with input voltages from +1.5 V to +7 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +1.5 V to +7 V - supports single-cell LiFePO₄, alkaline, and regulated 3.3 V/5 V rails. |
| Output Current | 100 mA - sufficient for dual op amp biasing or small analog front-ends without external boost stages. |
| Quiescent Current | 0.6 mA typical - enables battery-powered operation with minimal standby drain. |
| Charge-Pump Frequency | Selectable 25 kHz or 120 kHz - determines external capacitor size (10 µF vs. 2.2 µF) and output impedance trade-off. |
| Output Resistance | 9 Ω to 15 Ω at 100 mA - defines load regulation error and voltage droop under dynamic current steps. |
| Power Efficiency | 90–94% at 1 kΩ load - ensures minimal thermal rise and high energy conversion in space-constrained designs. |
| Package | 8-Lead SOIC_N (R-8) - industry-standard footprint compatible with automated assembly and legacy ICL7660 layouts. |
Pinout & Package
ADM660ARZ is housed in an 8-lead narrow-body SOIC package (R-8), measuring 4.90 mm × 3.90 mm × 1.75 mm, with standard 1.27 mm pitch and RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - FC | Frequency Control Input | Logic-level select: open = 25 kHz, V+ = 120 kHz - sets capacitor size and output impedance. |
| 2 - OUT | Output Terminal | Negative output in inverter mode; positive output in doubler mode - connects to load return or rail. |
| 3 - LV | Low-Voltage Mode Control | GND = optimized <3.5 V operation; open or OUT = >3.5 V or doubling mode - enables direct ICL7660 replacement. |
| 4 - OSC | External Oscillator Input | Accepts external clock (÷2 output) or timing capacitor - allows precise frequency tuning beyond 25/120 kHz. |
| 5 - V+ | Positive Supply Input | Main input rail (+1.5 V to +7 V); becomes output in doubler configuration - must be bypassed with ≥0.1 µF. |
| 6 - CAP+ | Positive Charge-Pump Node | Connects to C1 anode - forms flying capacitor path during charge-transfer phase. |
| 7 - GND | Ground Reference | System ground reference for input, control logic, and capacitor return - shared with CAP– in inverter mode. |
| 8 - CAP– | Negative Charge-Pump Node | Connects to C1 cathode - completes flying capacitor loop; tied to GND in doubler mode. |
Key Features
| Feature | Design Value |
|---|---|
| Inverting and doubling modes | Single IC replaces discrete charge-pump solutions for ±VCC generation or mid-rail boosting - reduces BOM count and layout area. |
| Selectable 25 kHz / 120 kHz operation | Enables optimal capacitor sizing: 10 µF (low ESR electrolytic) at 25 kHz or 2.2 µF (tantalum/ceramic) at 120 kHz - balances cost, size, and ripple. |
| External oscillator interface (OSC pin) | Supports precise frequency control via external clock or capacitor - critical for EMI-sensitive applications or synchronization with system clocks. |
| 0.3 V dropout at 30 mA | Ensures stable negative rail generation even under moderate load - avoids op amp headroom violations in precision signal chains. |
| Pin-compatible upgrade for MAX660/ICL7660 | Direct drop-in replacement in existing SOIC-8 footprints - eliminates PCB rework during obsolescence mitigation or performance upgrades. |
Applications
| Op Amp Dual-Rail Supply | Portable Instrumentation Power |
|---|---|
Use Scenario: Generating symmetric ±5 V rails from a single +5 V supply for rail-to-rail op amps in handheld test equipment. IC Role / Device Role / Timing Role: Voltage inverter providing clean, low-noise negative supply - replaces discrete DC/DC or transformer-based solutions. Use Value: Eliminates magnetic components and reduces board area by >40% while maintaining <10 mVpp ripple at 10 mA load. | Use Scenario: Powering low-power ADC drivers and sensor interfaces in battery-operated data loggers with 2.5 V–3.3 V main rails. IC Role / Device Role / Timing Role: Low-quiescent-current inverter generating –2.5 V from +2.5 V - enables true bipolar signal acquisition. Use Value: Delivers 92% efficiency at 1 mA load, extending battery life beyond 12 months in sleep-active cycling profiles. |
| Voltage Doubling for LCD Bias | Remote Sensor Node Negative Rail |
Use Scenario: Boosting +3.3 V microcontroller supply to +6.6 V for segment LCD bias in industrial HMIs. IC Role / Device Role / Timing Role: Voltage doubler operating in LV = OUT configuration - provides regulated high-impedance positive boost. Use Value: Achieves 90% efficiency at 20 mA with <50 mV load regulation - avoids need for dedicated boost converter IC. | Use Scenario: Creating isolated –3 V rail for RS-232 transceivers in remote environmental monitoring nodes powered by solar-charged Li-ion. IC Role / Device Role / Timing Role: Inverting converter with FC = open (25 kHz) driving 10 µF low-ESR capacitors - optimized for ultra-low standby current. Use Value: Maintains 600 µA quiescent draw and −3.0 V ±2% accuracy across –40°C to +85°C - ensures reliable UART communication in harsh conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter/doubler applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX660CPA+ | Same SOIC-8 pinout, 100 mA rating, but 800 µA typical IQ and no OSC pin - fixed 25 kHz only. | Lacks external oscillator control and voltage doubling flexibility; lower efficiency at light loads. | Choose when cost sensitivity outweighs programmability and efficiency requirements. |
| ICL7660CBAZ | SOIC-8 compatible, 20 mA max output, no FC/OSC pins, 1.5 V minimum input - legacy part with higher dropout (0.8 V). | Not suitable for >20 mA loads or <3 V inputs; no frequency selection or doubling mode. | Select only for legacy repair or ultra-low-cost replacements where performance margins are relaxed. |
Compared with MAX660CPA+ and ICL7660CBAZ, the ADM660ARZ offers superior efficiency (90–94% vs. ≤85%), wider input range (+1.5 V min), full doubling capability, and external frequency control - making it the preferred choice for new designs requiring flexibility, low noise, and extended battery life.
Availability
ADM660ARZ is available at Aetrix Electronics and suitable for op amp power supplies, portable instrumentation, remote data acquisition, and LCD bias circuits requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.
Supply support for ADM660ARZ 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 precision instrumentation, industrial automation, and communications markets since 1965.
The ADM660ARZ belongs to Analog Devices' switched-capacitor voltage converter product line, engineered specifically for compact, low-noise, and efficient rail-splitting and voltage boosting in space- and power-constrained systems.
FAQ
What are the valid input voltage ranges for ADM660ARZ in inverting versus doubling mode?
The ADM660ARZ accepts +1.5 V to +7 V in inverting mode (LV = GND or open). In doubling mode, input must be +2.5 V to +7 V with LV = OUT. Operation below +1.5 V or above +7 V violates absolute maximum ratings and risks permanent damage. The ADM660ARZ datasheet specifies these ranges under "Input Voltage" in the Electrical Characteristics table.
Can ADM660ARZ be used without external capacitors?
No - the ADM660ARZ requires two external low-ESR capacitors (C1 and C2) for charge-pump operation. Typical values are 10 µF at 25 kHz or 2.2 µF at 120 kHz. Omitting them prevents voltage conversion entirely. The ADM660ARZ relies on this external flying-capacitor topology; no internal storage capacitance exists.
Does ADM660ARZ support shutdown functionality like ADM8660?
No - the ADM660ARZ does not include a shutdown (SD) pin. That function is exclusive to the ADM8660 variant. The ADM660ARZ remains active whenever V+ is applied. To minimize power in idle states, system-level enable control must be implemented externally - for example, by gating V+ with a load switch.
What is the purpose of the LV pin on ADM660ARZ, and how should it be configured?
The LV pin on ADM660ARZ configures low-voltage operation: connect LV to GND for inputs <3.5 V to bypass internal regulation and optimize efficiency; leave open or tie to OUT for inputs ≥3.5 V or doubling mode. Incorrect LV configuration causes excessive dropout or failure to regulate - always verify per application voltage per the ADM660ARZ datasheet's Pin Function Descriptions.
Is ADM660ARZ pin-compatible with ICL7660, and what design considerations apply?
Yes - ADM660ARZ is pin-compatible with ICL7660 in SOIC-8 (R-8) packages and supports identical inverter configurations. However, ADM660ARZ adds FC and OSC pins (unconnected on ICL7660), so those pins must be left floating or tied appropriately. Layout reuse is possible, but verify LV pin handling and update bypassing per ADM660ARZ's lower dropout and higher efficiency.
ADM660ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Positive or Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 100mA
- Frequency - Switching:
- 25kHz, 120kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADM660ARZ FAQ
1.How can I place an order for ADM660ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM660ARZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADM660ARZ reliable?
The price and inventory of ADM660ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM660ARZ is usually 5 days.
3.What payment methods are accepted for ADM660ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM660ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM660ARZ?
ADM660ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM660ARZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADM660ARZ?
For technical support, including ADM660ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM660ARZ requirements.
6.How does Aetrix verify that ADM660ARZ is sourced from the original manufacturer or authorized distributors?
All ADM660ARZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADM660ARZ meets industry standards.
7.What is the process for return or replacement of ADM660ARZ?
All ADM660ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADM660ARZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADM660ARZ part is unused and in its original packaging.
Return procedure for ADM660ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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