STMicroelectronics TS922AIYDT

Overview

TS922AIYDT from STMicroelectronics is a rail-to-rail input/output dual BiCMOS operational amplifier optimized for 3 V and 5 V battery-powered audio systems. It delivers 80 mA output current into 32 Ω loads, features 9 nV/√Hz input noise at 1 kHz, 4 MHz gain-bandwidth product, 1 V/μs slew rate, and 900 μV max input offset voltage (TS922A grade), enabling high-fidelity line driving in portable speakers.

For engineers reviewing the TS922AIYDT datasheet, TS922AIYDT pinout, TS922AIYDT application, or TS922AIYDT equivalent, key selection criteria include low-noise performance in audio signal chains, rail-to-rail operation under 3 V supply, capacitive load stability up to 500 pF, and automotive-grade qualification per AEC-Q100.

Technical Context

The TS922AIYDT integrates two independent BiCMOS op-amps with complementary input stages enabling true rail-to-rail common-mode input range (V_CC– – 0.2 V to V_CC+ + 0.2 V) and rail-to-rail output swing. Its architecture supports stable operation with 500 pF capacitive loads without external compensation.

It operates across 2.7–12 V supply, achieves 60–80 dB CMRR and PSRR over full temperature range (–40 °C to +125 °C), and maintains 0.005% THD+N at 1 kHz with 600 Ω load - critical for low-distortion audio buffering and actuator control interfaces.

Key Specifications

Pinout & Package

TSSOP8 package: 3 mm × 4.4 mm body, 0.65 mm pitch, 1.05 mm height, lead-free ECOPACK® compliant. Flip-chip variant also available (8-bump, backcoated), but TS922AIYDT specifically uses TSSOP8 per ordering code Table 7.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual rail-to-rail op-amp applications.

Compared with TS922IDT, TS922AIYDT adds AEC-Q100 qualification and TSSOP8 packaging for space-constrained automotive layouts; versus MCP6022-E/SN, it trades bandwidth for higher output current and automotive reliability - making it optimal for battery-powered audio drivers needing robustness and load capability.

Availability

TS922AIYDT is available at Aetrix Electronics and suitable for portable audio systems, automotive infotainment modules, industrial sensor interfaces, and smart actuator controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TS922AIYDT 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and MEMS products for industrial, automotive, and consumer markets.

The TS922A series belongs to ST's precision analog op-amp portfolio, engineered specifically for low-voltage, low-noise, high-output-current applications in battery-powered and automotive audio systems.

FAQ

What is the maximum capacitive load the TS922AIYDT can drive without instability?

The TS922AIYDT is unity-gain stable with capacitive loads up to 500 pF, as verified in Figure 13 of DS1117 Rev 13. This allows direct connection to long PCB traces, EMI filters, or LCD panel lines without external isolation resistors or compensation networks.

Does TS922AIYDT support true single-supply operation with input voltages down to ground?

Yes - its rail-to-rail input stage accepts common-mode voltages from V_CC– – 0.2 V to V_CC+ + 0.2 V. With V_CC– tied to ground, inputs operate from –0.2 V to V_CC+ + 0.2 V, enabling direct interfacing with 0 V-referenced sensors or DACs without level-shifting circuitry.

How does the TS922AIYDT's 900 μV max input offset voltage compare to standard TS922 variants?

The TS922AIYDT uses the TS922A grade, guaranteeing ≤900 μV input offset voltage at 25 °C (≤1.8 mV over –40 °C to +125 °C), whereas standard TS922 parts specify ≤3 mV at 25 °C (≤5 mV over temperature). This tighter spec reduces DC error in precision gain stages and active filters.

Is thermal performance affected by the TSSOP8 package compared to SO8?

Yes - TSSOP8 has R_thJA = 120 °C/W versus SO8's 125 °C/W (DS1117 Table 1), offering marginally better power dissipation. At 3.2 mA total supply current and 5 V supply, junction rise is ~1.9 °C above ambient - well within safe limits for continuous operation in sealed enclosures.