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Analog Devices Inc. ADM8660ARZ
- Part No.:
- ADM8660ARZ
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM8660ARZ.pdf
- Description:
- IC REG CHARGE PUMP 100MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:536
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Product details
Overview
ADM8660ARZ from Analog Devices is a CMOS switched-capacitor voltage inverter IC that generates a regulated negative output (–VIN) from a +1.5 V to +7 V input supply, delivering up to 100 mA output current with 90% efficiency at 50 mA, and featuring a shutdown pin (SD) for <0.3 µA quiescent current - used in portable op amp power supplies and handheld instrumentation.
For engineers reviewing the ADM8660ARZ datasheet, ADM8660ARZ pinout, ADM8660ARZ application, or ADM8660ARZ equivalent, key selection criteria include its inverting-only operation (no doubling), 25/120 kHz selectable charge-pump frequency, 16-lead TSSOP package compatibility, and shutdown-controlled power gating for battery-sensitive systems.
Technical Context
The ADM8660ARZ implements a two-phase switched-capacitor topology using internal MOSFET switches controlled by an on-chip oscillator, with FC pin selecting between 25 kHz (GND) and 120 kHz (V+) charge-pump frequency to optimize external capacitor size (10 µF or 2.2 µF). It lacks oscillator control (OSC) but includes SD pin for logic-level shutdown.
Unlike the ADM660, the ADM8660ARZ omits voltage-doubling capability and external oscillator interface; its LV pin configures low-voltage operation (<3.5 V), and output regulation relies solely on charge transfer efficiency, internal switch RDS(on), and external capacitor ESR - not feedback or error amplifiers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Voltage inverter only (–VIN output); no doubling mode |
| Input Voltage Range | +1.5 V to +7 V - supports single-supply systems requiring negative rails |
| Output Current | 100 mA max - sufficient for dual-rail op amps and analog signal chains |
| Charge-Pump Frequency | Selectable 25 kHz (FC = GND) or 120 kHz (FC = V+) - determines capacitor sizing and ripple |
| Shutdown Current | 0.3 µA typical - enables ultra-low-power sleep states in portable devices |
| Efficiency | 90–94% at 50 mA load - high conversion efficiency reduces thermal load and extends battery life |
| Output Resistance | 9–15 Ω at 100 mA, 25°C - defines voltage droop under dynamic load |
Pinout & Package
ADM8660ARZ is housed in a 16-lead Thin Shrink Small Outline Package (TSSOP, RU-16), RoHS-compliant, with 0.65 mm pitch and exposed pad for thermal dissipation. Pin 1 marked, JEDEC MO-153-AB compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Not internally bonded - must be left floating or grounded per layout guidelines |
| 2 (OSC) | Oscillator Input | Not used on ADM8660 - must be left unconnected (not tied to V+ or GND) |
| 3 (V+) | Positive Supply Input | Main input rail (+1.5 V to +7 V); powers internal logic and charge pump |
| 4 (NC) | No Connect | Not internally bonded - must be left floating or grounded |
| 5 (NC) | No Connect | Not internally bonded - must be left floating or grounded |
| 6 (NC) | No Connect | Not internally bonded - must be left floating or grounded |
| 7 (FC) | Frequency Control | GND = 25 kHz, V+ = 120 kHz - sets switching frequency and capacitor requirements |
| 8 (CAP+) | Positive Pump Capacitor Terminal | Connects to positive plate of C1 - critical path for charge transfer |
| 9 (OUT) | Negative Output | Delivers inverted voltage (–VIN) - referenced to system GND |
| 10 (LV) | Low-Voltage Mode Select | GND = optimized for VIN < 3.5 V; open = standard mode for ≥3.5 V |
| 11 (GND) | Power Ground | System reference node - must be low-impedance connection to PCB ground plane |
| 12 (CAP–) | Negative Pump Capacitor Terminal | Connects to negative plate of C1 - completes charge-pump loop |
| 13 (SD) | Shutdown Control | Logic-high (≥2.4 V) disables charge pump; logic-low (≤0.8 V) enables operation |
| 14 (NC) | No Connect | Not internally bonded - must be left floating or grounded |
| 15 (NC) | No Connect | Not internally bonded - must be left floating or grounded |
| 16 (NC) | No Connect | Not internally bonded - must be left floating or grounded |
Key Features
| Feature | Design Value |
|---|---|
| Shutdown control (SD pin) | Reduces quiescent current to 0.3 µA - enables deep-sleep modes in battery-powered instruments |
| Selectable 25/120 kHz operation | Allows trade-off between capacitor size (10 µF vs. 2.2 µF) and output impedance/ripple |
| Inverting-only architecture | Eliminates risk of misconfiguration in doubling mode - simplifies design validation |
| Low ESR capacitor support | Enables <15 Ω output resistance at 100 mA - critical for stable op amp biasing |
| Industrial temperature range | –40°C to +85°C operation - suitable for embedded industrial sensors and data loggers |
Applications
| Portable Instrumentation Power | Op Amp Dual-Rail Supply |
|---|---|
Use Scenario: Handheld multimeters and portable oscilloscopes require isolated negative rails for analog front-end op amps without adding discrete DC/DC converters. IC Role / Device Role / Timing Role: ADM8660ARZ serves as a compact, capacitor-based negative voltage generator - replacing bulkier inductor-based solutions. Use Value: Delivers –5 V at 50 mA from +5 V input with <100 mV ripple, enabling rail-to-rail input op amps while minimizing board area and BOM count. | Use Scenario: Precision sensor signal conditioning circuits need clean ±2.5 V or ±5 V supplies for low-noise instrumentation amplifiers. IC Role / Device Role / Timing Role: ADM8660ARZ provides the negative rail in split-supply configurations - synchronized to system clock via FC pin for EMI control. Use Value: Achieves 93% efficiency at 30 mA load with 10 µF low-ESR capacitors, reducing thermal stress and improving long-term measurement stability. |
| Remote Data Acquisition | Battery-Powered Sensor Nodes |
Use Scenario: Wireless sensor nodes deployed in field environments require reliable negative bias for ADC drivers and level-shifting interfaces. IC Role / Device Role / Timing Role: ADM8660ARZ acts as a low-quiescent, shutdown-enabled inverter - activated only during sampling bursts. Use Value: Shutdown exit time of 500 µs allows rapid wake-up from microamp sleep states, preserving battery life over multi-year deployments. | Use Scenario: Low-power environmental monitors use coin-cell batteries and must minimize standby current across all subsystems. IC Role / Device Role / Timing Role: ADM8660ARZ supplies –3.3 V for RF transceiver biasing - disabled between transmissions via SD pin. Use Value: Reduces average system current by >99% during idle periods, extending CR2032 battery life from weeks to >18 months. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX660CPA+ | 8-pin DIP/SOIC; no shutdown; fixed 10 kHz oscillator; 50 mA max output | Lacks SD pin and higher output current - unsuitable for battery-gated systems | Choose only if legacy footprint compatibility and lower cost outweigh shutdown and current needs |
| ICL7660SIPAZ | 8-pin PDIP; no shutdown; 20 mA max output; higher quiescent current (1.2 mA) | Lower output capability and no power gating - limited to low-current analog biasing | Select when retrofitting older designs where SD and >20 mA are unnecessary |
Compared with MAX660CPA+ and ICL7660SIPAZ, the ADM8660ARZ offers 2× higher output current, integrated shutdown control, and 99.9% lower quiescent current in sleep mode - making it the only viable choice for modern energy-constrained instrumentation.
Availability
ADM8660ARZ is available at Aetrix Electronics and suitable for portable instrumentation, op amp dual-rail supplies, and remote data acquisition requiring stable component supply across extended production lifecycles.
Supply support for ADM8660ARZ 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, headquartered in Norwood, MA.
The ADM660/ADM8660 product line was designed specifically for compact, capacitor-based voltage inversion in space-constrained portable and battery-operated systems - prioritizing low quiescent power, wide input range, and robust ESR tolerance.
FAQ
What is the maximum output current specification for the ADM8660ARZ?
The ADM8660ARZ delivers up to 100 mA of continuous output current into a resistive load while maintaining ≥80% power efficiency. This rating applies across the full input voltage range (+1.5 V to +7 V) and operating temperature (–40°C to +85°C), with output resistance specified at 9–15 Ω at 100 mA and 25°C. Performance degrades above 100 mA due to thermal limits and internal switch saturation.
Can the ADM8660ARZ be used to double the input voltage like the ADM660?
No, the ADM8660ARZ is strictly a voltage inverter and cannot perform voltage doubling. Its internal architecture omits the OSC pin and associated circuitry required for doubling mode. The datasheet explicitly states "ADM8660: Inverts Input Supply Voltage" and confirms doubling is exclusive to the ADM660. Attempting doubling configurations will result in no valid output or device malfunction.
What is the correct configuration for the OSC pin on the ADM8660ARZ?
The OSC pin (Pin 2) on the ADM8660ARZ must be left unconnected - it is not functional and has no internal connection. Unlike the ADM660, the ADM8660ARZ replaces OSC with the SD (shutdown) pin (Pin 13). Connecting OSC to any voltage violates the absolute maximum ratings and may cause latch-up or permanent damage.
How does the LV pin affect performance of the ADM8660ARZ?
The LV pin on the ADM8660ARZ configures internal regulator behavior: connecting LV to GND optimizes operation below 3.5 V input, improving efficiency and output regulation; leaving LV open enables direct substitution for legacy ICL7660 designs at ≥3.5 V. Incorrect LV configuration causes excessive dropout or instability - especially critical in 1.5–3.0 V battery-powered applications.
What external capacitors are required for stable operation of the ADM8660ARZ?
The ADM8660ARZ requires two low-ESR electrolytic capacitors: C1 (charge pump) and C2 (output filter), both rated ≤0.2 Ω ESR. For 25 kHz operation (FC = GND), 10 µF capacitors are recommended; for 120 kHz (FC = V+), 2.2 µF suffices. Ceramic capacitors are unsuitable due to insufficient capacitance retention under bias - use aluminum or tantalum types with rated voltage ≥1.5× VIN.
ADM8660ARZ 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:
- 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
- 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
ADM8660ARZ FAQ
1.How can I place an order for ADM8660ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8660ARZ 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 ADM8660ARZ reliable?
The price and inventory of ADM8660ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8660ARZ is usually 5 days.
3.What payment methods are accepted for ADM8660ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM8660ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM8660ARZ?
ADM8660ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM8660ARZ 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 ADM8660ARZ?
For technical support, including ADM8660ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8660ARZ requirements.
6.How does Aetrix verify that ADM8660ARZ is sourced from the original manufacturer or authorized distributors?
All ADM8660ARZ 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 ADM8660ARZ meets industry standards.
7.What is the process for return or replacement of ADM8660ARZ?
All ADM8660ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADM8660ARZ, 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 ADM8660ARZ part is unused and in its original packaging.
Return procedure for ADM8660ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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