ATA5785-GHQW Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
ATA5785-GHQW is a low-power RF receiver IC by Microchip designed for 315/433/868/915 MHz ISM band wireless applications, featuring no user ROM and RoHS-compliant VQFN package construction. Key specs: multi-band ASK/FSK reception, VQFN (Z1) package, Pb-free and RoHS compliant. From competitive pricing, in stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 33
- Lifecycle
- ACTIVE
- Datasheet
- ATA5785-GHQW Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Multi-band RF receiver supporting 315 MHz, 433 MHz, 868 MHz, and 915 MHz ISM bands enables global wireless system deployment with a single IC
- ASK and FSK demodulation capability covers a broad range of OOK remote control, sensor, and telemetry protocols in a single device
- Compact VQFN (Z1) package with RoHS-compliant Pb-free construction meets global environmental regulations for consumer and industrial wireless products
- Low external component count receiver architecture reduces BOM complexity and PCB area in cost-sensitive short-range wireless designs
Applications
ATA5785-GHQW is designed for short-range wireless receiver applications including keyless entry systems, garage door openers, and remote control devices operating across 315 MHz, 433 MHz, 868 MHz, and 915 MHz ISM frequency bands. Its multi-band flexibility makes it suitable for home automation sensors, wireless alarm panels, and meter-reading systems that must comply with regional radio regulations in North America, Europe, and Asia simultaneously. The compact VQFN package and low external component count lower system cost in high-volume consumer wireless products.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for ATA5785-GHQW:
suggested
suggested
suggested
suggested
Frequently Asked Questions
Which ISM frequency bands does ATA5785-GHQW support and how does that enable global product deployment?
ATA5785-GHQW supports the 315 MHz, 433 MHz, 868 MHz, and 915 MHz ISM bands. North American products typically use 315 MHz or 915 MHz, while European designs default to 433 MHz or 868 MHz under ETSI EN 300 220. A single ATA5785-GHQW receiver design can be re-tuned via external matching network to cover any of these bands, allowing one hardware platform to address multiple regional markets without a PCB redesign.
For a wireless doorbell or remote control design, what receiver sensitivity and data rate can be expected from ATA5785-GHQW?
ATA5785-GHQW targets short-range ISM band receiver performance typical of ASK/OOK and FSK receivers in the -100 dBm to -110 dBm sensitivity class at data rates of 1 kbps to 20 kbps, which is sufficient for remote control signals needing 10-30 m indoor range. Exact figures depend on modulation, bandwidth configuration, and antenna matching — the full sensitivity and data rate specifications are provided in the Microchip datasheet for confirmed design use.
How does the VQFN (Z1) package of ATA5785-GHQW affect RF layout and antenna routing?
The VQFN package provides a compact, low-profile SMD footprint with an exposed thermal pad that also serves as a ground reference for the RF circuitry. Keeping the RF input trace from the antenna matching network to the IC shorter than λ/20 (less than about 5-8 mm at 433 MHz) minimizes parasitic inductance and capacitance that would detune the 50 Ω match. A solid ground pour under the package on all inner layers reduces impedance discontinuities that would degrade receiver sensitivity by several dB.
When is ATA5785-GHQW a better choice than a transceiver IC for a receive-only wireless sensor application?
ATA5785-GHQW is the better choice when the system only receives data and needs to minimize standby current to extend battery life beyond 1-2 years on coin cells. Transceiver ICs include transmit circuitry that typically consumes 15-30 mA during TX operation and has higher quiescent current even in standby. A dedicated receiver like ATA5785-GHQW can achieve sub-1 mA active receive current, significantly extending the useful life of CR2032 (225 mAh) or AA (2400 mAh) batteries in always-listening sensor nodes.
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