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Analog Devices Inc. ADM8829ARTZ-REEL7
- Part No.:
- ADM8829ARTZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6
- Datasheet:
-
ADM8829ARTZ-REEL7.pdf
- Description:
- IC REG CHARGE PUMP 25MA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,037
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Product details
Overview
ADM8829ARTZ-REEL7 from Analog Devices is a switched-capacitor voltage inverter IC that generates a regulated negative output voltage from a +1.5 V to +5.5 V positive input supply, delivers up to 25 mA output current, achieves ≥99% voltage conversion efficiency at no load, and operates with only two external 1 µF low-ESR capacitors. It is used in op amp dual-rail power supplies and portable LCD bias generation.
For engineers reviewing the ADM8829ARTZ-REEL7 datasheet, ADM8829ARTZ-REEL7 pinout, ADM8829ARTZ-REEL7 application, or ADM8829ARTZ-REEL7 equivalent, key selection criteria include input voltage range compatibility, shutdown capability absence (vs. ADM8828), output resistance under load, ripple performance at target current, and SOT-23-6 package integration constraints.
Technical Context
The ADM8829 employs a fixed-frequency charge-pump topology with internal oscillator (50–190 kHz) and complementary-phase switching network to invert input voltage without inductors. Its operation relies on precise timing control of four internal MOSFET switches driving external flying (C1) and output (C2) capacitors.
Unlike the ADM8828, the ADM8829 omits the SHDN pin-pin 4 is NC-and thus lacks active shutdown functionality; quiescent current remains fixed at 600 µA typical. Output regulation is open-loop, with output voltage magnitude matching input (e.g., +3.3 V in → –3.3 V out), and output impedance varies with temperature and load (18 Ω typ. at 5 mA).
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. |
| Output Current | 25 mA - sufficient for biasing dual-supply op amps or small LCD segment drivers. |
| Voltage Conversion Efficiency | 99.5% to 99.96% (no load) - minimizes input power waste and thermal rise in space-constrained designs. |
| Output Resistance | 18 Ω (typ.) at 5 mA - defines load regulation error and output droop under dynamic current steps. |
| Output Ripple | 25 mV p-p at 5 mA - determines noise sensitivity in analog signal chains and reference circuits. |
| Charge-Pump Frequency | 65 kHz (at VIN = +2.25 V) to 190 kHz (max) - sets capacitor size vs. EMI trade-off and filtering requirements. |
| Quiescent Current | 600 µA (typ.) - fixed supply draw; no low-power mode available due to missing SHDN function. |
Pinout & Package
ADM8829ARTZ-REEL7 is housed in a RoHS-compliant 6-lead SOT-23 package (JEDEC MO-178-AB, package option RJ-6), measuring 2.90 mm × 1.60 mm × 1.15 mm, with gull-wing leads and pin 1 indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Negative output terminal | Delivers inverted voltage rail; connects to load ground reference or op amp negative supply pin. |
| 2 (IN) | Positive input supply | Accepts +1.5 V to +5.5 V source; requires local 1 µF bypass capacitor to GND for transient current support. |
| 3 (CAP+) | Flying capacitor positive node | Connects to positive plate of C1; internal switch node toggled between IN and GND during charge phase. |
| 4 (NC) | No connect | Pin is unconnected internally; must be left floating or tied to GND per layout best practice-no functional role. |
| 5 (GND) | Power ground reference | Common return path for IN, CAP–, and load; requires low-impedance PCB plane connection. |
| 6 (CAP–) | Flying capacitor negative node | Connects to negative plate of C1; internal switch node toggled between OUT and GND during transfer phase. |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless voltage inversion | Eliminates magnetic components and EMI concerns; enables ultra-thin portable PCB layouts. |
| Two-capacitor operation | Reduces BOM count and board area; supports standard 1 µF ceramic or low-ESR electrolytic capacitors. |
| Wide input range (+1.5 V to +5.5 V) | Enables direct use across battery chemistries (1× alkaline, 1× Li-ion) and regulated system rails. |
| High conversion efficiency (≥99.5%) | Preserves battery life in always-on instrumentation and extends runtime in handheld devices. |
| SOT-23-6 footprint | Provides drop-in compatibility with industry-standard pick-and-place equipment and reflow profiles. |
Applications
| Op Amp Dual-Supply Bias | Portable LCD Contrast Control |
|---|---|
|
Use Scenario: Generating –3.3 V rail for rail-to-rail op amps in battery-powered data loggers where only a +3.3 V LDO is available. IC Role / Device Role / Timing Role: Voltage inverter providing symmetric dual supply; no timing interface required. Use Value: Enables true bipolar signal swing without adding a second battery or inductor-based DC/DC converter. |
Use Scenario: Supplying negative bias voltage to STN or segment LCD panels in PDAs operating from a single 3.6 V Li-ion cell. IC Role / Device Role / Timing Role: Charge-pump inverter delivering stable –2.8 V to –4.0 V; operates autonomously with internal oscillator. Use Value: Achieves contrast tuning with <25 mV p-p ripple, avoiding visible flicker or ghosting in static display segments. |
| Handheld Instrument Power Rails | Remote Sensor Signal Conditioning |
|
Use Scenario: Creating isolated negative supply for precision ADC driver stages in handheld multimeters powered by two AA cells. IC Role / Device Role / Timing Role: Inverting +3.0 V nominal input to –3.0 V output; functions as passive voltage translator with no control signals. Use Value: Maintains >99% efficiency across 1.5 V–5.5 V input range, ensuring consistent performance as batteries discharge. |
Use Scenario: Biasing JFET-input instrumentation amplifiers in wireless sensor nodes where PCB space limits discrete solutions. IC Role / Device Role / Timing Role: Compact SOT-23-6 inverter supplying –5.0 V to amplifier negative supply pin; no external clock needed. Use Value: Delivers 25 mA peak current with 18 Ω output resistance, supporting fast settling of low-noise front-end stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage inverter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM8828ARTZ-REEL7 | Includes SHDN pin (pin 4); shutdown current = 0.02 µA; otherwise identical pinout and specs. | Required where system-level power gating or deep-sleep modes are implemented. | Select ADM8828ARTZ-REEL7 when active power management is needed; ADM8829ARTZ-REEL7 is preferred for always-on, fixed-rail designs. |
| MAX680ESA+ | Higher output current (100 mA); wider input range (+4.5 V to +20 V); SO-8 package; no shutdown. | Suitable for higher-power analog circuits but incompatible with SOT-23 layout and low-voltage battery inputs. | Choose MAX680ESA+ only if >25 mA output or >5.5 V input is required; not a drop-in replacement for ADM8829ARTZ-REEL7. |
Compared with ADM8828ARTZ-REEL7, ADM8829ARTZ-REEL7 eliminates shutdown control to reduce cost and complexity in always-on systems; compared with MAX680ESA+, it offers smaller size and lower-voltage operation but sacrifices output drive strength and input headroom.
Availability
ADM8829ARTZ-REEL7 is available at Aetrix Electronics and suitable for handheld instruments, LCD panel biasing, and op amp power supplies requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for ADM8829ARTZ-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 ADM8828/ADM8829 product line was designed specifically for compact, inductor-free negative voltage generation in portable and space-constrained electronic systems.
FAQ
What is the function of Pin 4 (NC) on the ADM8829ARTZ-REEL7?
Pin 4 on the ADM8829ARTZ-REEL7 is designated NC (No Connect) and is unconnected internally. It must not be used for signal routing or grounding. Unlike the ADM8828ARTZ-REEL7-which uses Pin 4 as SHDN-the ADM8829ARTZ-REEL7 lacks shutdown functionality, so this pin serves no electrical purpose. Per Analog Devices' recommendation, it may be left floating or tied to GND for mechanical stability, but it does not affect ADM8829ARTZ-REEL7 operation.
Can the ADM8829ARTZ-REEL7 generate output voltages beyond ±5.5 V?
No. The ADM8829ARTZ-REEL7 is strictly limited to inverting the input voltage magnitude: a +1.5 V to +5.5 V input produces a –1.5 V to –5.5 V output. It does not provide voltage multiplication or regulation beyond this 1:1 inversion ratio. Attempting to exceed the absolute maximum ratings (e.g., >+6 V on IN or <–6 V on OUT) risks permanent damage. The ADM8829ARTZ-REEL7 output voltage tracks input voltage directly and cannot be adjusted via feedback or external resistors.
What capacitor types and values are recommended for the ADM8829ARTZ-REEL7?
Analog Devices specifies 1 µF low-ESR electrolytic or ceramic capacitors for both C1 (flying) and C2 (output). ESR must be <0.2 Ω to maintain efficiency and minimize ripple. Increasing C1 reduces output resistance; increasing C2 lowers output ripple. For ADM8829ARTZ-REEL7, using matched 1 µF capacitors simplifies design and ensures stable operation across –40°C to +85°C. Tantalum or polymer capacitors meeting ESR and voltage rating (≥6.3 V) are acceptable alternatives.
How does the ADM8829ARTZ-REEL7 differ from the ADM8828ARTZ-REEL7?
The ADM8829ARTZ-REEL7 is identical to the ADM8828ARTZ-REEL7 in all electrical specifications except shutdown capability: ADM8829ARTZ-REEL7 has NC on Pin 4, while ADM8828ARTZ-REEL7 uses Pin 4 as an active SHDN input (0.02 µA shutdown current). Both share the same SOT-23-6 package, pinout (except Pin 4), input range, output current, and efficiency. ADM8829ARTZ-REEL7 is selected when shutdown is unnecessary, reducing system control complexity.
Is the ADM8829ARTZ-REEL7 suitable for automotive applications?
The ADM8829ARTZ-REEL7 is rated for industrial temperature range (–40°C to +85°C) and meets JEDEC SOT-23 reliability standards, but it is not AEC-Q200 qualified or specified for automotive use. It lacks automotive-specific qualification testing (e.g., extended temperature cycling, board-level vibration, or fault injection). For automotive infotainment or body electronics, designers should verify full compliance with vehicle OEM requirements before deploying ADM8829ARTZ-REEL7; Analog Devices does not guarantee automotive-grade robustness for this part.
ADM8829ARTZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- 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):
- 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
ADM8829ARTZ-REEL7 FAQ
1.How can I place an order for ADM8829ARTZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8829ARTZ-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 ADM8829ARTZ-REEL7 reliable?
The price and inventory of ADM8829ARTZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8829ARTZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM8829ARTZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM8829ARTZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM8829ARTZ-REEL7?
ADM8829ARTZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM8829ARTZ-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 ADM8829ARTZ-REEL7?
For technical support, including ADM8829ARTZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8829ARTZ-REEL7 requirements.
6.How does Aetrix verify that ADM8829ARTZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM8829ARTZ-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 ADM8829ARTZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM8829ARTZ-REEL7?
All ADM8829ARTZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM8829ARTZ-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 ADM8829ARTZ-REEL7 part is unused and in its original packaging.
Return procedure for ADM8829ARTZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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