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Analog Devices Inc. ADM8828ART-REEL7
- Part No.:
- ADM8828ART-REEL7
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6
- Datasheet:
-
ADM8828ART-REEL7.pdf
- Description:
- IC MULTI CONFIG ADJ 25MA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:45,000
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Product details
Overview
ADM8828ART-REEL7 from Analog Devices is a switched-capacitor voltage inverter IC that generates a regulated negative output from a +1.5 V to +5.5 V positive input, delivering up to 25 mA with 99.5% voltage conversion efficiency and 20 nA shutdown current. It features a dedicated SHDN pin, requires only two 1 µF low-ESR capacitors, and operates in a 6-lead SOT-23 package for space-constrained portable power rails.
For engineers reviewing the ADM8828ART-REEL7 datasheet, ADM8828ART-REEL7 pinout, ADM8828ART-REEL7 application, or ADM8828ART-REEL7 equivalent, this device is selected for compact dual-rail generation where low quiescent current, high inversion efficiency, and fast shutdown exit (<175 µs) are critical in battery-powered instrumentation and analog signal chains.
Technical Context
The ADM8828ART-REEL7 implements a two-phase charge-pump topology with an internal oscillator (50–190 kHz) driving complementary switch pairs to invert input voltage via flying and output capacitors. Its on-resistance and switching timing are optimized for >99% voltage conversion efficiency at no load and ≥91% power efficiency at 200 Ω load.
Shutdown control is implemented as a logic-level input (VSHDN < 0.8 V enables; >2.0 V disables), reducing supply current to 20 nA while discharging OUT to GND. Output regulation relies entirely on external capacitor selection and ESR, with no internal feedback loop or voltage reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +1.5 V to +5.5 V - supports single-cell Li-ion, alkaline, and regulated 3.3 V/5 V rails without external LDO pre-regulation. |
| Output Current | 25 mA - sufficient to power op-amps, ADC bias networks, or LCD contrast circuits without external buffering. |
| Voltage Conversion Efficiency | 99.5% (typ) at no load - minimizes input current draw and heat generation in ultra-low-power systems. |
| Shutdown Current | 20 nA - enables multi-week standby in handheld instruments with periodic wake-up cycles. |
| Output Resistance | 18 Ω (typ) at 5 mA load - determines load regulation error and ripple under dynamic current steps. |
| Charge-Pump Frequency | 65 kHz (at VIN = +2.25 V) to 190 kHz (max) - higher frequency allows smaller external capacitors but increases EMI sensitivity. |
| Output Ripple | 25 mVp-p at 5 mA - sets minimum filtering requirement for noise-sensitive analog stages like precision op-amp inputs. |
Pinout & Package
The ADM8828ART-REEL7 is housed in a RoHS-compliant 6-lead SOT-23 package (JEDEC MO-178-AB, package option RJ-6), with 1.9 mm × 2.9 mm footprint and 1.3 mm height, suitable for automated pick-and-place assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Negative output terminal | Delivers inverted voltage rail; must be decoupled with low-ESR capacitor to minimize ripple and source transient current. |
| 2 - IN | Positive input supply | Accepts unregulated or regulated DC input; bypass capacitor recommended between IN and GND for surge current support. |
| 3 - CAP− | Negative flying capacitor node | Connects to negative terminal of flying capacitor C1; forms half of charge-transfer path during φ2 phase. |
| 4 - GND | Power ground reference | Common return for input, output, and internal switches; must be low-impedance to avoid ground bounce-induced ripple. |
| 5 - CAP+ | Positive flying capacitor node | Connects to positive terminal of flying capacitor C1; forms half of charge-transfer path during φ1 phase. |
| 6 - SHDN | Active-low shutdown control | Pulled low to enable; pulled high (>2.0 V) to disable and reduce current to 20 nA; open-drain compatible with microcontroller GPIO. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply negative rail generation | Eliminates need for dual-output DC/DC converters or split-rail supplies in portable analog front-ends. |
| Ultra-low shutdown current | 20 nA enables >10-year battery life in always-on sensor nodes when paired with low-leakage output capacitors. |
| Two-capacitor operation | Reduces BOM count and PCB area vs. inductor-based inverters; supports 1 µF ceramic or tantalum capacitors. |
| High voltage conversion efficiency | 99.5% efficiency preserves battery energy and avoids thermal derating in sealed enclosures. |
| Fast shutdown exit time | 175 µs recovery ensures rapid reactivation for burst-mode data acquisition without system-level delays. |
Applications
| Handheld Instrumentation | LCD Panel Bias Supply |
|---|---|
Use Scenario: Portable multimeters and oscilloscopes requiring isolated negative rail for op-amp input stages and ADC reference buffers. IC Role / Device Role / Timing Role: Voltage inverter providing –3.3 V or –5 V rail from main 3.3 V battery supply. Use Value: Enables rail-to-rail input op-amps and true bipolar ADC sampling without adding transformer-isolated DC/DC or extra batteries. |
Use Scenario: Monochrome or segment LCD displays needing adjustable contrast voltage (VEE) between –1.5 V and –5.5 V. IC Role / Device Role / Timing Role: Programmable negative bias generator controlled by MCU GPIO via SHDN pin for dynamic contrast adjustment. Use Value: Delivers stable, low-noise VEE with <25 mVp-p ripple at 5 mA, improving display legibility across temperature and battery voltage range. |
| Op Amp Dual-Rail Power | Remote Sensor Signal Conditioning |
Use Scenario: Low-power instrumentation amplifiers and transimpedance amplifiers requiring symmetric ±2.5 V or ±3.3 V supplies from single 5 V source. IC Role / Device Role / Timing Role: Inverting charge pump supplying clean negative rail synchronized to analog signal chain clocking. Use Value: Maintains >99% voltage conversion efficiency even at light loads, minimizing offset drift caused by supply asymmetry. |
Use Scenario: Battery-powered remote data loggers conditioning thermocouple or bridge sensor outputs with precision op-amps. IC Role / Device Role / Timing Role: Negative rail generator enabled only during active measurement windows via SHDN to extend battery life. Use Value: 20 nA shutdown current reduces average system current by >99% during sleep, enabling multi-year deployment on coin cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680ESA+ | Higher 100 mA output current but 120 µA quiescent current; requires 10 µF capacitors; no shutdown pin. | Better suited for high-current analog rails but unsuitable for ultra-low-power sleep modes. | Select MAX680ESA+ only when >50 mA load current or higher output capacitance tolerance is required. |
| TPS60403DBVR | 30 mA output, 120 µA quiescent current, 20 µA shutdown current; fixed 2× inverting ratio; integrated soft-start. | Provides tighter output regulation but lacks programmable input range - limited to 1.6 V–5.5 V input. | Choose TPS60403DBVR if consistent –2× inversion ratio and soft-start are prioritized over minimal quiescent current. |
Compared with MAX680ESA+ and TPS60403DBVR, the ADM8828ART-REEL7 offers the lowest shutdown current (20 nA) and widest input range (+1.5 V to +5.5 V), making it optimal for long-life, wide-voltage portable instrumentation where power budget dominates performance trade-offs.
Availability
ADM8828ART-REEL7 is available at Aetrix Electronics and suitable for handheld instruments, LCD panel bias supplies, and op amp dual-rail power systems requiring stable component supply, full RoHS compliance, and guaranteed long-term sourcing.
Supply support for ADM8828ART-REEL7 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, founded in 1965 and headquartered in Wilmington, MA.
The ADM8828ART-REEL7 belongs to Analog Devices' switched-capacitor power management product line, designed specifically for compact, low-quiescent-current voltage inversion in portable and battery-operated analog signal chains.
FAQ
What is the maximum continuous output current specification for the ADM8828ART-REEL7?
The ADM8828ART-REEL7 delivers up to 25 mA of continuous output current into a resistive load while maintaining specified output voltage accuracy and ripple. Absolute maximum rating allows 50 mA, but sustained operation above 25 mA degrades voltage conversion efficiency and increases output resistance beyond 28 Ω, risking instability with capacitive loads. For reliable 25 mA operation, use 1 µF low-ESR electrolytic or tantalum capacitors as specified in the datasheet.
Does the ADM8828ART-REEL7 require external feedback components to regulate its output voltage?
No, the ADM8828ART-REEL7 does not include internal feedback or regulation circuitry. Its output voltage is a direct inversion of the input (VOUT ≈ –VIN) and varies linearly with input changes. Regulation depends entirely on stability of the input supply and low ESR of external capacitors. For applications requiring tight output tolerance, the input rail must be pre-regulated, and load transients must remain within the 25 mA limit to avoid droop.
Can the ADM8828ART-REEL7 operate from a 1.8 V lithium coin cell battery?
Yes, the ADM8828ART-REEL7 supports input voltages as low as +1.5 V, making it fully compatible with 1.8 V coin cells such as CR2032. At 1.8 V input, it delivers approximately –1.8 V output with >99% voltage conversion efficiency and maintains 20 nA shutdown current. Output current capability drops to ~12 mA at this input level, as confirmed in Figure 4 of the datasheet, which plots output current versus capacitance and input voltage.
What is the function of the CAP+ and CAP− pins on the ADM8828ART-REEL7?
The CAP+ and CAP− pins on the ADM8828ART-REEL7 connect to opposite terminals of the flying capacitor (C1) used in the charge-pump inversion cycle. During phase φ1, CAP+ is charged to VIN; during phase φ2, CAP+ is grounded and CAP− connects to the output, transferring inverted charge to the output capacitor (C2). These pins must be routed with short, low-inductance traces and decoupled with low-ESR capacitors to maintain >99% efficiency and minimize switching noise coupling.
Is the ADM8828ART-REEL7 pin-compatible with the ADM8829ARTZ-REEL7?
No, the ADM8828ART-REEL7 and ADM8829ARTZ-REEL7 are not pin-compatible. The ADM8828ART-REEL7 uses all six pins including SHDN, CAP+, CAP−, IN, OUT, and GND. The ADM8829ARTZ-REEL7 replaces SHDN with NC and swaps CAP+ and CAP− positions, resulting in different pin assignments (e.g., Pin 3 = CAP+ on ADM8828 vs. Pin 3 = CAP+ on ADM8829 but Pin 4 = NC instead of GND). PCB layout must be redesigned to accommodate either variant.
ADM8828ART-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Ratiometric
- Output Configuration:
- Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- -Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 25mA
- Frequency - Switching:
- 120kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
ADM8828ART-REEL7 FAQ
1.How can I place an order for ADM8828ART-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8828ART-REEL7 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 ADM8828ART-REEL7 reliable?
The price and inventory of ADM8828ART-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8828ART-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM8828ART-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM8828ART-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM8828ART-REEL7?
ADM8828ART-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM8828ART-REEL7 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 ADM8828ART-REEL7?
For technical support, including ADM8828ART-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8828ART-REEL7 requirements.
6.How does Aetrix verify that ADM8828ART-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM8828ART-REEL7 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 ADM8828ART-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM8828ART-REEL7?
All ADM8828ART-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM8828ART-REEL7, 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 ADM8828ART-REEL7 part is unused and in its original packaging.
Return procedure for ADM8828ART-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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