AD7768-4BSTZ: 24-Bit 4-Channel Simultaneous ADC – Technical Guide, Alternatives & Market Insights

What is the AD7768-4BSTZ and what are its key verified specifications?

The AD7768-4BSTZ is a 24-bit, 4-channel simultaneous sampling sigma-delta ADC from Analog Devices. It delivers a maximum output data rate of 256 kSPS and a wideband input bandwidth of 110.8 kHz, housed in a 64-lead LQFP (10x10 mm) package. As of 2026-08-25, the component is in active lifecycle status with 99,999 units in stock at XAIPART, priced at $25.4545 per unit for quantities of 1000 or more. This ADC supports differential and single-ended inputs, operates from a 2.5 V analog supply and a 2.5 V to 3.3 V digital interface supply, and is specified over -40°C to +105°C.

The AD7768-4BSTZ features three power modes (fast, median, low power) allowing designers to trade off bandwidth, data rate, and power dissipation. Its wideband low-pass filter provides ±0.005 dB pass-band ripple and 105 dB stop-band attenuation at the Nyquist frequency. The SPI interface simplifies configuration and data readout, making it suitable for high-performance measurement systems.

How to select and design in the AD7768-4BSTZ?

When selecting the AD7768-4BSTZ, consider your channel count, required data rate, and power budget. With 4 channels and up to 256 kSPS, it fits applications like power line monitoring, vibration analysis, and multi-phase energy metering. The three power modes allow optimization: fast mode for maximum bandwidth, low power mode for battery-operated devices (typical power dissipation 27.5 mW in low power mode).

Design-in requires careful attention to power supply decoupling: use separate analog (AVDD1/AVDD2 at 2.5 V) and digital (DVDD at 2.5-3.3 V) supplies, and place 0.1 µF and 10 µF capacitors close to each supply pin. Provide a low-jitter master clock on MCLK (pin 22) to achieve the specified SNR. The reference inputs (REF+ and REF-) should be driven by a low-noise reference, and the internal reference buffer simplifies this.

For simultaneous sampling, ensure SYNC_IN (pin 21) is used to align multiple AD7768-4 devices if needed. The SPI interface (SCLK, SDI, SDO, CS) allows configuration of power mode, filter settings, and data readout. Use the DRDY (pin 19) output to trigger data reads. The RESET pin (pin 20) is active low and must be pulsed after power-up.

Thermal management: the 64-LQFP package has a thermal resistance of [DATA_NEEDED: thermal resistance], but the low power modes help keep junction temperature within limits. The operating temperature range of -40°C to +105°C covers industrial environments.

What are the drop-in alternatives and how do they compare?

Based on verified data, the primary drop-in alternative is the AD7768-4BSTZ-RL, which is the tape and reel version of the same device. Other alternatives include the AD7768BSTZ (8-channel version) and cross-brand options like TI ADS1274 and ADS1174, but these are not pin-compatible and require PCB redesign. The table below compares key specifications.

Summary: The AD7768-4BSTZ is the only 4-channel, 24-bit simultaneous sampling ADC with a 64-LQFP package in this comparison. The AD7768BSTZ offers 8 channels but is not pin-compatible for all channels. The ADS1274 is a functional alternative but requires a redesign due to different package and pinout. The ADS1174 has lower resolution (16-bit) and may not meet precision requirements.

What is the market position and supply situation for the AD7768-4BSTZ?

The AD7768-4BSTZ is in active lifecycle status, indicating it is in full production and widely available. XAIPART currently holds 99,999 units in stock, with a base price of $25.4545 as of 2026-08-25. The pricing tiers show volume discounts: $43.6364 for 1 unit, $31.5152 for 10, $27.8788 for 100, $26.6667 for 500, and $25.4545 for 1000+.

As a 24-bit, 4-channel simultaneous sampling ADC, the AD7768-4BSTZ competes in the precision data converter market. Its combination of high resolution, simultaneous sampling, and low power modes positions it well for industrial and energy applications. The active lifecycle status suggests long-term availability, reducing obsolescence risk for designs.

Supply chain: With 99,999 units in stock at XAIPART, immediate availability is strong. For larger volumes, lead times may vary; [DATA_NEEDED: lead time data]. The tape and reel variant (AD7768-4BSTZ-RL) is also available, catering to high-volume production.

What trends and outlook should buyers watch for the AD7768-4BSTZ?

Buyers should monitor the continued demand for high-resolution simultaneous sampling ADCs in applications like power line monitoring and vibration analysis. The AD7768-4BSTZ's 24-bit resolution and 256 kSPS data rate make it suitable for next-generation smart grid and industrial IoT systems.

The three power modes (fast, median, low power) align with the trend toward energy-efficient designs, allowing portable and battery-powered equipment to extend operational life. The wideband input bandwidth of 110.8 kHz supports higher-frequency signal analysis, which is critical for advanced vibration monitoring and audio test.

As of 2026-08-25, the AD7768-4BSTZ is in active lifecycle status, indicating stable supply. However, buyers should watch for potential price fluctuations due to market conditions. The availability of the tape and reel variant (AD7768-4BSTZ-RL) suggests continued production support.

For future designs, consider the AD7768BSTZ (8-channel) if channel count requirements increase, but note the pinout differences. Cross-brand alternatives like TI ADS1274 may offer competitive pricing but require PCB redesign. Always verify the latest datasheet and availability before committing to a design.