BD3812F-E2 - 2-Channel Audio Volume Controller | ROHM
MPN: BD3812F-E2 ✓ فعالBD3812F-E2 جائزہ
An electronic volume controller is an audio signal processor that adjusts the level of one or more audio channels through a control interface rather than a mechanical potentiometer. In the product hierarchy, it belongs to the broader class of audio special-purpose ICs, which sit between analog signal-generation blocks and power amplifiers. The BD3812F-E2 is designed to preserve audio signal quality while providing repeatable, software-controlled attenuation for multi-channel audio systems.
The BD3812F-E2 supports independent control of two channels over a 103 dB attenuation range. Its mute function changes the level in 1 dB steps, making it suitable for product designs that need fine attenuation control, channel balancing, or user-selected volume settings. When combined with any of the BD3811K1, BD3813KS, BD3814FV, or BD3815KS family members, as specified by ROHM, the common bus supports up to eight channels. The common-bus architecture can also control as many as four chips at the same time.
The maximum output voltage is 4.2 Vrms under the stated conditions of VCC = 7 V, VEE = -7 V, and RL = 10 kOhm. This output capability, combined with a residual-noise specification of 1.2 uVrms, supports low-noise audio signal paths. The two-line serial control reduces the number of control connections required compared with a parallel volume-control arrangement, which can also simplify PCB routing and microcontroller interface design.
Typical uses include television and monitor audio channels, home-audio systems, active speakers, audio mixers, and multi-zone entertainment equipment. The device is particularly useful where independent left and right attenuation, common-bus expansion, mute control, or precise software-defined volume adjustment is required. Because its operating supply range is specified as 5 V to 7.3 V, the surrounding circuit must provide compatible positive and negative analog rails where the application requires the stated 4.2 Vrms output capability.
Designers should preserve the datasheet-specified bypass and output-load conditions when evaluating signal integrity. The 10 kOhm load used for the stated maximum-output condition is relevant to downstream amplifier planning, and any external coupling or amplifier input must not load the output beyond the supported operating conditions. Decoupling should be placed close to the supply pins, and the common-bus wiring of multiple devices should be kept short to minimize coupling between channels.
This product data combines the verified ROHM feature description with distributor packaging information, practical multi-channel application guidance, and explicit data-gap markers. It distinguishes verified numeric performance from unreported specifications and does not infer a pin assignment, temperature range, or drop-in substitute that the supplied sources do not confirm.
کے لیے ڈراپ اِن متبادل BD3812F-E2 — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
BA3812L
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
BD3812F-E2 تفصیلات
| Product Type | 2-channel electronic audio volume controller |
| Residual Noise | 1.2 uVrms |
| Dynamic Range | 131 dB under IHF-A weighting |
| Independent Channel Count | 2 channels |
| Attenuation Range | 0 dB to -103 dB |
| Mute Control Increment | 1 dB per step |
| Maximum Output Voltage | 4.2 Vrms at VCC = 7 V, VEE = -7 V, and RL = 10 kOhm |
| Maximum Combined Channel Count | 8 channels using specified BD3811K1, BD3813KS, BD3814FV, or BD3815KS family members |
| Maximum Simultaneously Controlled Chips | 4 chips on a common bus line |
| Control Interface | 2-line serial control |
| Supply Voltage Range | 5 V to 7.3 V |
| Positive Test Supply | 7 V for the stated 4.2 Vrms output condition |
| Negative Test Supply | -7 V for the stated 4.2 Vrms output condition |
| Output Load Condition | 10 kOhm |
| پیکیج | 14-SOIC, 4.40 mm width |
| ماؤنٹنگ ٹائپ | Surface mount |
| Packaging | Tape and reel |
| زمرہ | Audio special-purpose integrated circuit |
BD3812F-E2 14-soic, 4.40 mm width پن کنفیگریشن گائیڈ
BD3812F-E2 (14-soic, 4.40 mm width پیکیج) کے لیے پن کنفیگریشن۔ پن نمبرنگ، فنکشنز اور کنکشن ڈایاگرامز مینوفیکچرر کے ڈیٹا شیٹ میں بیان کیے گئے ہیں۔ درست فٹ پرنٹ اور سولڈرنگ رہنما ہدایات کے لیے اسی سے رجوع کریں۔
کے لیے تفصیلی پن آؤٹ ڈیٹا دستیاب نہیں BD3812F-E2.
رجوع کریں ڈیٹا شیٹ مکمل پن کنفیگریشن کے لیے۔
عام استعمالات
BD3812F-E2 کے لیے موزوں ہے 6 ایپلیکیشنs: Home-Theater Surround Audio, Television Audio Volume Control, Multi-Zone Audio Distribution, Active Speaker Crossover, Portable Audio Accessory, Audio Mixing Console Preamp.
Home-Theater Surround Audio
The BD3812F-E2 fits home-theater surround-audio paths because it provides independent attenuation for two channels over a 0 dB to -103 dB range, with mute changes in 1 dB steps. Its 1.2 uVrms residual noise and 131 dB IHF-A dynamic range help preserve low-level dialogue and quiet musical passages during attenuation. The part can also be combined with the BD3811K1, BD3813KS, BD3814FV, or BD3815KS devices identified by ROHM to expand a common-bus design to as many as eight channels. The downstream amplifier should operate within the stated 10 kOhm load condition when evaluating the 4.2 Vrms maximum output.
تجویز کردہ
Television Audio Volume Control
The BD3812F-E2 is suitable for television and monitor audio channels requiring software-controlled level adjustment rather than a user-operated potentiometer. Two channels can be attenuated independently from 0 dB to -103 dB, and the 1 dB mute increments permit smooth channel balancing or mute transitions. Its two-line serial control reduces interface wiring compared with a parallel attenuator arrangement, while the 14-SOIC package supports compact surface-mount layouts. ROHM specifies a maximum output of 4.2 Vrms with VCC = 7 V, VEE = -7 V, and RL = 10 kOhm, which should be matched to the television amplifier and coupling network.
تجویز کردہ
Multi-Zone Audio Distribution
The BD3812F-E2 can support multi-zone audio routing because it offers independent attenuation for two channels and shares a common control bus with compatible devices. ROHM states that as many as eight channels can be available when the part is combined with any of the BD3811K1, BD3813KS, BD3814FV, or BD3815KS family members, and up to four chips can be controlled simultaneously. The 0 dB to -103 dB range allows substantial level reduction between program sources or zones. A practical design should keep the common bus short, provide clean supply rails, and confirm that each downstream power amplifier accepts the selected signal level.
تجویز کردہ
Active Speaker Crossover
The BD3812F-E2 can be placed in an active-speaker signal path to provide electronic level matching between source outputs and power-amplifier inputs. Independent 0 dB to -103 dB attenuation allows separate adjustment of two driver channels, while 1 dB mute steps make calibration and setup repeatable through the control system. The specified 1.2 uVrms residual noise and 131 dB IHF-A dynamic range are useful when maintaining quiet program material. Because maximum output reaches 4.2 Vrms under a 10 kOhm load and specified positive and negative rails, the amplifier input, coupling capacitors, and grounding topology must be validated for speaker crossover bandwidth and transient behavior.
تجویز کردہ
Portable Audio Accessory
The BD3812F-E2 is appropriate for a compact audio accessory that requires precise digital attenuation between a source device and an analog amplifier. The two independent channels support stereo level adjustment, while the 1.2 uVrms residual noise helps minimize added hiss in headphone or line-level paths. Its two-line serial control can simplify connection to a small controller, and the 14-SOIC package provides a standard surface-mount footprint. Battery-powered implementations must account for the required 5 V to 7.3 V supply range and positive and negative rail arrangement, and should verify shutdown behavior and quiescent current directly from the manufacturer datasheet.
تجویز کردہ
Audio Mixing Console Preamp
The BD3812F-E2 can serve as a digitally adjustable preamp element in a compact audio mixer or monitor controller. Two channels can be attenuated independently, and the 0 dB to -103 dB range provides broad control for source balancing and mute operation. The 1 dB mute increments are convenient when a controller needs repeatable software-selected attenuation, while the low 1.2 uVrms residual noise supports quiet program reproduction. The stated 4.2 Vrms maximum output applies at 7 V positive supply, -7 V negative supply, and 10 kOhm load, so a mixer requiring different headroom or impedance must be evaluated against the complete manufacturer electrical specification.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا BD3812F-E2 — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | BA3812L |
|---|---|---|
| Product Type | 2-channel electronic audio volume controller | 2-channel electronic volume-control comparator |
| Brand | ROHM Semiconductor | ROHM Semiconductor |
| Package | 14-SOIC, 4.40 mm width | 14-SOIC candidate footprint; exact package verification required |
| Channel Count | 2 channels | 2 channels |
| Mounting Type | Surface mount | Surface-mount candidate; exact package verification required |
اہم امتیازی خصوصیات
- Large attenuation range with fine mute resolution (بمقابلہBA3812L)
- Verified low-noise audio performance (بمقابلہBA3812L)
- Documented common-bus expansion capability (بمقابلہBA3812L)
- Defined high-output operating condition (بمقابلہBA3812L)
ڈیزائن نوٹس
Keep the two-line serial-control route short and away from analog output and power-amplifier input paths. When several BD381x devices share the common bus, follow the manufacturer connection sequence and verify device addressing before PCB release. Place input, output, and bypass capacitors close to their associated pins, use a continuous ground reference where appropriate, and avoid routing the bus beneath switching-power or loudspeaker-amplifier output nodes. Because the supplied results do not expose a verified pin table, engineers should derive every net assignment from the official ROHM datasheet rather than from the 14-SOIC package drawing alone.
The stated maximum output of 4.2 Vrms applies at VCC = 7 V, VEE = -7 V, and RL = 10 kOhm. Do not assume the same swing is available with a smaller negative rail, a different load, or a supply outside the verified 5 V to 7.3 V range. Provide low-impedance supply paths and the bypass network specified by ROHM. Confirm the quiescent current, startup behavior, and absolute maximum ratings from the datasheet before selecting the analog supply topology, particularly for battery-powered designs where conversion efficiency and rail headroom can determine whether full output swing is achievable.
Treat the volume controller as a precision analog block even though its settings are controlled digitally. The verified residual-noise figure is 1.2 uVrms, with 131 dB dynamic range under IHF-A weighting, but system noise also depends on resistor matching, reference behavior, supply ripple, and downstream amplifier noise. Use symmetric signal paths where channel matching matters, maintain consistent grounding between the two channels, and avoid excessive loading beyond the 10 kOhm condition used for the stated 4.2 Vrms output. Validate mute-step transitions and channel-balance behavior in the complete amplifier circuit rather than relying on controller specifications alone.
تعمیل کی معلومات
A cross-reference snippet describes the part as RoHS compliant, but the supplied verified manufacturer and distributor excerpts do not contain the underlying compliance declaration. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status are therefore reported as unknown. AEC-Q100 qualification is not indicated for this audio processor.
