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Analog Devices Inc. ADM8828ART-REEL
- Part No.:
- ADM8828ART-REEL
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6
- Datasheet:
-
ADM8828ART-REEL.pdf
- Description:
- IC REG CHARGE PUMP 25MA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,048
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Product details
Overview
ADM8828ART-REEL 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 supply. It delivers up to 25 mA output current with 99.5% voltage conversion efficiency, features a dedicated shutdown pin (SHDN), and operates in a 6-lead SOT-23 package. It is used in op amp dual-rail power supplies where space-constrained single-supply systems require clean negative bias.
For engineers reviewing the ADM8828ART-REEL datasheet, ADM8828ART-REEL pinout, ADM8828ART-REEL application, or ADM8828ART-REEL equivalent, key selection criteria include shutdown current (20 nA), output resistance (18 Ω), input voltage range (+1.5 V to +5.5 V), charge-pump frequency (50–190 kHz), and compatibility with 1 µF low-ESR electrolytic capacitors.
Technical Context
The ADM8828ART-REEL implements a two-phase switched-capacitor inversion topology using internal MOSFET switches controlled by an on-chip oscillator. It requires only two external capacitors - C1 (flying) and C2 (output) - both rated at 1 µF with ESR < 0.2 Ω for optimal performance.
Its SHDN pin accepts TTL/CMOS-compatible logic levels (VSHDN ≤ 0.8 V for enable, ≥ 2.0 V for disable), and shutdown exit time is specified at 175 µs under 5 mA load. Output regulation is unregulated but tightly tracks inverted input magnitude (e.g., +3.3 V in → –3.3 V out) with ripple as low as 25 mVp-p at 5 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +1.5 V to +5.5 V - supports Li-ion, alkaline, and regulated 3.3 V/5 V rails without external LDO pre-regulation. |
| Output Current | 25 mA - sufficient to power rail-to-rail op amps, LCD bias circuits, or small analog front-ends. |
| Voltage Conversion Efficiency | 99.5% (typ, no load) - minimizes heat generation and extends battery life in portable instruments. |
| Shutdown Current | 20 nA - enables ultra-low-power sleep modes in handheld data loggers and remote sensors. |
| Output Resistance | 18 Ω (typ, 5 mA load) - determines load regulation error; e.g., 0.45 V drop at 25 mA full load. |
| Charge-Pump Frequency | 65 kHz (at VIN = +2.25 V) - sets capacitor size vs. ripple trade-off; higher VIN increases frequency up to 190 kHz. |
| Output Ripple | 25 mVp-p (5 mA load) - meets noise requirements for precision op amp biasing without additional filtering. |
Pinout & Package
ADM8828ART-REEL 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. Pin 1 is marked with a dot or beveled edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Negative output terminal | Delivers inverted voltage (e.g., –VIN); connects directly to load ground-referenced negative rail. |
| 2 - IN | Positive input supply | Accepts +1.5 V to +5.5 V; bypass capacitor required between IN and GND for transient current support. |
| 3 - CAP– | Negative flying capacitor node | Connects to negative terminal of C1; phase-switched node critical for charge transfer timing. |
| 4 - GND | Power and reference ground | Common return for IN, OUT, and SHDN; must be low-impedance to minimize ripple coupling. |
| 5 - SHDN | Active-low shutdown control | Pulled low to enable; pulled high (>2.0 V) to disable and reduce quiescent current to 20 nA. |
| 6 - CAP+ | Positive flying capacitor node | Connects to positive terminal of C1; driven by internal oscillator to alternate charge/discharge phases. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated oscillator & switching network | Eliminates need for external clock or control logic; self-contained operation with fixed-frequency charge pumping. |
| Low-ESR capacitor optimization | Specified for <0.2 Ω ESR electrolytics - ensures >99% efficiency and stable ripple performance across temperature. |
| Dedicated shutdown function | Reduces system standby power by 4 orders of magnitude (600 µA → 20 nA), enabling long-term battery operation. |
| Input voltage tracking | Output magnitude matches input (VOUT ≈ –VIN) across full 1.5–5.5 V range - simplifies rail generation for variable-supply systems. |
| SOT-23 footprint compatibility | Enables drop-in replacement in space-constrained PCB layouts designed for other 6-pin DC/DC inverters. |
Applications
| Op Amp Dual-Rail Supply | LCD Panel Bias Generation |
|---|---|
Use Scenario: Generating symmetric ±3.3 V rails from a single 3.3 V supply for rail-to-rail instrumentation amplifiers in handheld test equipment. IC Role / Device Role / Timing Role: Voltage inverter providing clean, low-noise negative rail; no timing interface required - autonomous charge-pump operation. Use Value: Eliminates need for discrete inductor-based converters, reducing BOM count and EMI while maintaining 25 mA drive capability. |
Use Scenario: Supplying –5 V bias to segment drivers in monochrome STN LCD modules powered from 3.0 V coin cells. IC Role / Device Role / Timing Role: Negative voltage generator with shutdown control synchronized to display refresh cycles to conserve battery. Use Value: 20 nA shutdown current extends coin-cell lifetime beyond 5 years in always-on display applications. |
| Cellular Phone Audio Codec Bias | Remote Sensor Signal Conditioning |
Use Scenario: Providing –1.8 V bias for analog audio codec inputs in GSM handsets operating from 3.6 V Li-ion batteries. IC Role / Device Role / Timing Role: Low-noise inverter powering microphone preamp stages; operates continuously during call mode. Use Value: 25 mVp-p output ripple prevents audible noise coupling into sensitive audio paths. |
Use Scenario: Powering isolated signal-conditioning circuitry (e.g., bridge sensor amplifier + ADC driver) in battery-powered industrial wireless nodes. IC Role / Device Role / Timing Role: Negative rail source enabling true bipolar input range for 24-bit delta-sigma ADCs. Use Value: 99.5% conversion efficiency maximizes usable energy from primary lithium thionyl chloride 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 quiescent current (1.2 mA vs. 0.6 mA), no shutdown pin, fixed 100 kHz frequency | Lacks low-power shutdown; less suitable for intermittent-use battery devices | Select when board layout already uses MAX680 and shutdown is not required. |
| ICL7660SIPAZ | Wider input range (+1.5 V to +12 V), lower max output current (20 mA), 10 µA shutdown current (vs. 20 nA) | Supports higher VIN but offers 500× higher shutdown current - limits ultra-low-power use cases | Prefer for systems requiring >5.5 V input or legacy ICL7660 footprint compatibility. |
Compared with MAX680ESA+ and ICL7660SIPAZ, ADM8828ART-REEL provides the lowest shutdown current (20 nA), highest voltage conversion efficiency (99.5%), and tightest output resistance (18 Ω), making it optimal for battery-critical, noise-sensitive, and high-precision analog applications.
Availability
ADM8828ART-REEL is available at Aetrix Electronics and suitable for handheld instruments, LCD panels, and cellular phone power management requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for ADM8828ART-REEL 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-REEL belongs to Analog Devices' switched-capacitor power management product line, engineered specifically for compact, low-noise, battery-efficient negative rail generation in portable and space-constrained systems.
FAQ
What is the minimum input voltage required for stable operation of the ADM8828ART-REEL?
The ADM8828ART-REEL operates reliably down to +1.5 V input voltage, as confirmed in the Absolute Maximum Ratings and Electrical Specifications tables. At this minimum, output voltage is approximately –1.5 V with reduced output current capability (≈12 mA at 1.5 V per Figure 4), and charge-pump frequency drops to ~50 kHz. Operation below 1.5 V is not guaranteed and may result in failure to start or excessive ripple.
Can the ADM8828ART-REEL drive a 100 Ω load continuously?
No - the ADM8828ART-REEL is rated for 25 mA maximum continuous output current, corresponding to a minimum load resistance of 180 Ω at –5 V output (|VOUT|/25 mA). Driving a 100 Ω load would demand 50 mA, exceeding absolute maximum ratings and risking thermal shutdown or permanent damage. For such loads, a higher-current inverter or inductor-based solution is required.
Is a bypass capacitor required on the IN pin of the ADM8828ART-REEL?
Yes - a ≥1 µF ceramic or low-ESR electrolytic capacitor between IN and GND is mandatory per the datasheet's General Information section. This capacitor supplies instantaneous current during charge-transfer peaks, preventing input voltage sag and reducing ripple coupling. Omission causes increased output ripple, instability, and potential oscillation in the charge-pump loop.
What happens to the OUT pin voltage during ADM8828ART-REEL shutdown?
During shutdown (SHDN ≥ 2.0 V), the ADM8828ART-REEL disables its internal oscillator and switches, causing the OUT pin to discharge through the load and internal leakage paths to 0 V. The datasheet explicitly states "the output voltage discharges to 0 V" - meaning grounded loads remain unpowered, and no negative voltage persists at OUT.
Does the ADM8828ART-REEL require external timing components?
No - the ADM8828ART-REEL integrates a fully self-contained oscillator and switching network. No external resistors, capacitors, or clocks are needed to set or synchronize the charge-pump frequency, which varies automatically with input voltage (65 kHz at +2.25 V, up to 190 kHz at +5 V). This simplifies design and improves reliability versus timer-dependent topologies.
ADM8828ART-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- 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-REEL FAQ
1.How can I place an order for ADM8828ART-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8828ART-REEL 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-REEL reliable?
The price and inventory of ADM8828ART-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8828ART-REEL is usually 5 days.
3.What payment methods are accepted for ADM8828ART-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM8828ART-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM8828ART-REEL?
ADM8828ART-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM8828ART-REEL 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-REEL?
For technical support, including ADM8828ART-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8828ART-REEL requirements.
6.How does Aetrix verify that ADM8828ART-REEL is sourced from the original manufacturer or authorized distributors?
All ADM8828ART-REEL 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-REEL meets industry standards.
7.What is the process for return or replacement of ADM8828ART-REEL?
All ADM8828ART-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM8828ART-REEL, 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-REEL part is unused and in its original packaging.
Return procedure for ADM8828ART-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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