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Analog Devices Inc. ADP8861ACPZ-R7
- Part No.:
- ADP8861ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 20-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADP8861ACPZ-R7.pdf
- Description:
- IC LED DRV RGLTR I2C 20LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,730
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Product details
Overview
ADP8861ACPZ-R7 from Analog Devices is a 7-channel smart LED driver IC with integrated charge pump, I²C interface, and independent programmable current sinks for backlight and indicator applications. It delivers up to 30 mA per channel (D1–D6) and 60 mA on D7, supports automatic 1×/1.5×/2× gain selection, operates from 2.5 V to 5.5 V input, and features <1 μA standby current. It is used in mobile display and keypad backlighting where precise fade control and low-power operation are critical.
For engineers reviewing the ADP8861ACPZ-R7 datasheet, ADP8861ACPZ-R7 pinout, ADP8861ACPZ-R7 application, or ADP8861ACPZ-R7 equivalent, this page provides verified technical context, exact pin functions, real-world use scenarios, confirmed alternative parts, and supply support for industrial and mobile embedded designs requiring stable, programmable LED drive with fault protection.
Technical Context
The ADP8861ACPZ-R7 implements a two-capacitor switched-capacitor charge pump with automatic gain switching between 1×, 1.5×, and 2× based on real-time current sink headroom voltage (VHR ≥ 180 mV). Its I²C-controlled 7-sink architecture supports independent or grouped LED control, with fade timing programmable across 16 steps (0.1–5.5 s) using linear, square, or cubic profiles.
It integrates short-circuit, overvoltage (5.8 V OVP), and overtemperature (150 °C shutdown) protection, plus input-to-output isolation during faults. Internal soft start limits inrush current to 3.75 mA typical, and undervoltage lockout activates at VIN = 2.05 V (typical) with 80 mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Channels | 7 independent current sinks: D1–D6 @ 30 mA max (typ), D7 @ 60 mA max (typ) |
| Charge Pump Gains | Auto-selected 1×, 1.5×, or 2×; enables efficient LED drive across 2.5–5.5 V input range |
| I²C Interface | Standard-mode (400 kHz), 2.5–5.5 V VDDIO, with dedicated SDA/SCL pins and reset/interrupt signals |
| Current Programming | 128-level max current control per sink; matching ≤2.0% (all sinks), ≤1.5% (D2–D7) |
| Protection Features | Short-circuit, overvoltage (5.8 V), overtemperature (150 °C), UVLO (2.05 V), and input-output isolation |
| Standby Current | <1 μA (typ) with nSTBY = 0; enables ultra-low-power system sleep states |
| Fade Timing | 16 programmable rates (0.1–5.5 s); supports linear, square, or cubic fade profiles per channel group |
Pinout & Package
ADP8861ACPZ-R7 is available in a 20-lead, 4 mm × 4 mm × 0.75 mm LFCSP package with exposed paddle (EPAD) requiring connection to GND1/GND2. Pin numbering follows top-view layout as defined in Figure 3 of Rev. C datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input power supply | 2.5–5.5 V main supply; powers internal logic and charge pump; triggers UVLO at 2.05 V |
| VOUT | Charge pump regulated output | Delivers boosted voltage (up to 5.5 V) to LED anodes; regulated at 4.9 V (typ) under load |
| D1–D7 | LED current sink outputs | Seven independent NMOS sinks; D1–D6: 30 mA max (typ), D7: 60 mA max (typ) when SCR=1 |
| C1+, C1−, C2+, C2− | Charge pump capacitor terminals | Interface external 1 μF flying capacitors; define charge/discharge paths for 1×/1.5×/2× gain modes |
| SCL / SDA | I²C clock and data | Standard-mode interface (400 kHz); require external pull-ups; support full register programming |
| nRST | Hardware reset input | Active-low; resets all registers to defaults; includes 50 μs noise filter to prevent spurious activation |
| nINT | Interrupt output | Open-drain, active-low signal indicating fault (OVP, OTP, short) or fade completion |
| GND1 / GND2 | Analog/digital ground | Separate ground pins; EPAD must be soldered to both for thermal and noise performance |
Key Features
| Feature | Design Value |
|---|---|
| Automatic gain selection | Switches between 1×/1.5×/2× based on real-time LED sink headroom; avoids unnecessary voltage overhead and improves efficiency |
| Programmable fade profiles | 16 discrete fade-in/fade-out times (0.1–5.5 s) with selectable linear/square/cubic response-enables perceptually smooth transitions |
| Independent sink control | Each of 7 sinks configurable for max current, fade enable, and group assignment via I²C-supports mixed backlight + indicator use cases |
| Integrated safety suite | Short-circuit, overvoltage (5.8 V), overtemperature (150 °C), and UVLO with hysteresis-eliminates need for external fault monitoring circuitry |
| Ultra-low standby consumption | <1 μA quiescent current in standby mode (nSTBY = 0)-extends battery life in always-on mobile UIs |
Applications
| Mobile Display Backlighting | Mobile Keypad Indication |
|---|---|
Use Scenario: Driving white LEDs behind small-format LCD panels (e.g., 3.5″–5″ smartphones) with dynamic brightness scaling. IC Role / Device Role / Timing Role: Charge pump LED driver providing regulated current to 4–6 parallel LEDs; manages fade transitions during screen unlock/lock events. Use Value: Enables uniform, flicker-free backlight dimming across 128 brightness levels with <1 μA sleep current-critical for AMOLED/LCD hybrid UIs. |
Use Scenario: Illuminating alphanumeric keypads or touch-sensitive buttons in feature phones and rugged handhelds. IC Role / Device Role / Timing Role: Independent sink control allows per-key or grouped illumination; fade override supports tactile feedback on press/release. Use Value: Eliminates discrete transistor drivers and RC timing networks-reduces BOM count by ≥7 components per keypad zone. |
| Dual RGB Status Lighting | Small-Format OLED Panel Bias |
Use Scenario: Driving red/green/blue indicator LEDs for status signaling (e.g., charging, Bluetooth, network) in compact wearables. IC Role / Device Role / Timing Role: Uses D1–D3 for R/G/B channels; leverages I²C group control to synchronize color transitions without MCU intervention. Use Value: Achieves precise 1% current matching between RGB channels-ensures consistent color point across temperature (−40°C to +85°C). |
Use Scenario: Providing bias current to OLED pixel anodes in low-power smartwatch displays where panel voltage exceeds battery rail. IC Role / Device Role / Timing Role: Configured in 2× gain mode to generate stable >4.5 V from 2.8 V Li-ion; D7 supplies 60 mA for high-current segments. Use Value: Delivers regulated output voltage (4.9 V typ) with <3.8 Ω equivalent resistance-minimizes voltage droop during pixel refresh bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar smart LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3530TMX/NOPB | 6-channel, no D7 60 mA option; fixed 1.5×/2× gain only; lacks fade profile selection (linear only) | Supports fewer LEDs and simpler fade behavior; lower integration for cost-sensitive keypad-only designs | Choose when 6-channel count suffices and advanced fade control is unnecessary |
| MAX1698EUT+T | 4-channel, higher 100 mA per channel; no I²C-uses analog dimming and EN/PWM inputs | Targeted at automotive interior lighting; requires external PWM generator and lacks programmable fade timing | Prefer for high-current, non-I²C systems where MCU GPIO resources are constrained |
Compared with LM3530TMX/NOPB and MAX1698EUT+T, the ADP8861ACPZ-R7 uniquely combines 7-channel flexibility, D7 60 mA capability, multi-profile fade timing, and full I²C configurability-making it optimal for space-constrained mobile UIs requiring both backlight and status lighting in one IC.
Availability
ADP8861ACPZ-R7 is available at Aetrix Electronics and suitable for mobile display backlighting, keypad indication, dual RGB status lighting, and small-format OLED panel bias requiring stable component supply across production lifecycles.
Supply support for ADP8861ACPZ-R7 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision, power, and connectivity applications.
The ADP8861ACPZ-R7 belongs to Analog Devices' smart LED driver product line, designed specifically for low-voltage, battery-powered mobile interfaces requiring programmable brightness, fade control, and robust fault protection in minimal footprint.
FAQ
What is the maximum output current capability of the ADP8861ACPZ-R7 on its seventh LED channel?
The ADP8861ACPZ-R7 supports up to 60 mA (typical) on its D7 channel when the SCR bit in the ISC7 register is set to 1. This is distinct from D1–D6, each limited to 30 mA (typical). The 60 mA capability is verified across −40°C to +85°C and enables driving higher-brightness indicators or supplemental backlight segments without external amplification. All current settings are digitally programmable via I²C.
Does the ADP8861ACPZ-R7 support automatic charge pump gain selection, and how does it work?
Yes, the ADP8861ACPZ-R7 implements automatic gain selection among 1×, 1.5×, and 2× based on real-time current sink headroom voltage (VHR). When the minimum VD1:D7 drops below 200 mV (typ), gain increases; when headroom exceeds VDMAX (calculated internally), gain reduces. A 100 μs stabilization delay prevents oscillation. This ensures optimal efficiency without manual configuration or firmware intervention.
How many fade timing profiles does the ADP8861ACPZ-R7 support, and what are their ranges?
The ADP8861ACPZ-R7 supports 16 programmable fade-in and fade-out times, ranging from 0.1 seconds to 5.5 seconds per full-scale transition (30 mA or 60 mA). Each profile can be assigned independently to LED groups via I²C registers. Fade shape is selectable as linear, square, or cubic-enabling perceptually uniform dimming aligned with human vision response.
What protection features are integrated into the ADP8861ACPZ-R7?
The ADP8861ACPZ-R7 integrates short-circuit protection (VOUT falling to 0.55 × VIN), overvoltage protection (5.8 V threshold with 500 mV hysteresis), overtemperature shutdown (150 °C with 20 °C hysteresis), and input-to-output isolation during faults. It also includes UVLO (2.05 V start-up), internal soft start (3.75 mA typical), and ESD protection (±3 kV HBM). These eliminate need for external protection circuitry.
What package options are available for the ADP8861ACPZ-R7, and which one does the -R7 suffix indicate?
The ADP8861ACPZ-R7 uses the 20-lead, 4 mm × 4 mm × 0.75 mm LFCSP package with exposed paddle. The "-R7" suffix denotes tape-and-reel packaging (7-inch reel, 3000 units per reel), standard for automated SMT assembly. This LFCSP variant differs from the WLCSP option (20-ball, 2.15 mm × 2.36 mm) and requires GND1/GND2 and EPAD soldering for thermal performance and noise immunity.
ADP8861ACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 7
- Voltage - Supply (Min):
- 2.5V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 4.3V ~ 5.5V
- Current - Output / Channel:
- 30mA, 60mA
- Frequency:
- 1MHz
- Dimming:
- I2C
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-LFCSP (4x4)
ADP8861ACPZ-R7 FAQ
1.How can I place an order for ADP8861ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP8861ACPZ-R7 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 ADP8861ACPZ-R7 reliable?
The price and inventory of ADP8861ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP8861ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for ADP8861ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP8861ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP8861ACPZ-R7?
ADP8861ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP8861ACPZ-R7 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 ADP8861ACPZ-R7?
For technical support, including ADP8861ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP8861ACPZ-R7 requirements.
6.How does Aetrix verify that ADP8861ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADP8861ACPZ-R7 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 ADP8861ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of ADP8861ACPZ-R7?
All ADP8861ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP8861ACPZ-R7, 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 ADP8861ACPZ-R7 part is unused and in its original packaging.
Return procedure for ADP8861ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADP8861ACPZ-R7 Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
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BCR420UE6433HTMA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
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BCR420UFD-7
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