Overview
The SA575DTBG, produced by onsemi, is a precision dual gain control circuit designed for low voltage applications. This component is part of the SA575 series and is packaged in a TSSOP-20 (Pb-Free) package. It is suitable for a wide range of audio applications, operating within the complete audio spectrum from 20 Hz to 20 kHz.
The SA575 features two channels, each capable of being configured in different modes such as expandor, compressor, or automatic level control (ALC). Each channel includes a rectifier cell, variable gain cell, summing amplifier, and a voltage reference cell. Additionally, the device includes two high-performance uncommitted op amps for tasks like filtering, pre-emphasis/de-emphasis, or buffering.
Key Specifications
| Characteristic | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3.0 | 5.0 | 7.0 | V |
| Supply Current (ICC) | 3.0 | 4.2 | 5.5 | mA |
| Reference Voltage (VREF) | 2.4 | 2.5 | 2.6 | V |
| Total Harmonic Distortion (THD) | - | 0.12 | 1.5 | % |
| Output Voltage Noise (ENO) | - | 6.0 | 30 | μV |
| Operating Ambient Temperature Range (TA) | -40 | - | 85 | °C |
| Operating Junction Temperature (TJ) | - | - | 150 | °C |
| Storage Temperature Range (TSTG) | - | - | 150 | °C |
Key Features
- Operating voltage range from 3.0 V to 7.0 V
- Reference voltage of 100 mVRMS = 0 dB
- One dedicated summing op amp per channel and two extra uncommitted op amps
- 600 Ω drive capability
- Single or split supply operation
- Wide input/output swing capability
- Pb-Free, Halogen Free/BFR Free and RoHS Compliant
Applications
- Portable Communications
- Cellular Radio
- Cordless Telephone
- Consumer Audio
- Portable Broadcast Mixers
- Wireless Microphones
- Modems
- Electric Organs
- Hearing Aids
Q & A
- What is the operating voltage range of the SA575DTBG?
The operating voltage range is from 3.0 V to 7.0 V.
- What is the reference voltage for the SA575DTBG?
The reference voltage is typically 2.5 V, which is half of the supply voltage (VCC).
- How many op amps are included in the SA575DTBG?
The device includes one dedicated summing op amp per channel and two additional uncommitted op amps.
- What are the common configurations for the SA575DTBG channels?
Channel A can be configured as a 1:2 expandor, while channel B can be configured as a 2:1 compressor, a 1:2 expandor, or an automatic level control (ALC) circuit.
- What is the typical application frequency range for the SA575DTBG?
The component is suitable for the complete audio spectrum from 20 Hz to 20 kHz.
- Is the SA575DTBG RoHS compliant?
- What are some of the key applications of the SA575DTBG?
Key applications include portable communications, cellular radio, cordless telephone, consumer audio, and more.
- How does the SA575DTBG handle DC blocking and power supply decoupling?
The device uses capacitors for DC blocking and power supply decoupling. Capacitors like C3, C5, C8, and C12 are used for DC blocking, and capacitors like C6 and C14 are used for decoupling and stabilizing the voltage reference circuit and power supply, respectively.
- What is the maximum power dissipation for the SA575DTBG?
The maximum power dissipation is 1068 mW.
- What is the thermal impedance of the SA575DTBG?
The thermal impedance (θJA) is 124 °C/W.
