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AD7994BRU-1REEL
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Product Detailed Parameters
- Description：IC ADC 12BIT 4CHAN I2C 16TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Bulk
- Number of Bits：12
- Sampling Rate (Per Second)：188k
- Number of Inputs：-
- Input Type：-
- Data Interface：I2C
- Configuration：-
- Ratio - S/H:ADC：-
- Number of A/D Converters：1
- Architecture：-
- Reference Type：-
- Voltage - Supply, Analog：-
- Voltage - Supply, Digital：-
- Features：-
- Operating Temperature：-40°C ~ 125°C
- Package / Case：16-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：16-TSSOP
- Mounting Type：Surface Mount
- Grade：-
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Overview
The AD7994BRU-1REEL is a 12-bit, low-power successive approximation analog-to-digital converter (ADC) featuring four single-ended analog input channels and an I2C-compatible serial interface. It operates from a single 2.7 V to 5.5 V supply with a typical conversion time of 2 µs and a throughput rate up to 188 kSPS. The device supports standard, fast, and high-speed I2C modes, includes pin-selectable addressing via the AS pin, and provides an out-of-range alert function. It is housed in a 16-lead TSSOP package and specified for operation over a temperature range of −40°C to +125°C.
Feature Summary
- Four-channel multiplexer with track-and-hold amplifier supporting input frequencies up to 11 MHz
- I2C-compatible serial interface supporting standard, fast, and high-speed modes
- Pin-selectable addressing allowing multiple devices on the same serial bus
- Out-of-range indicator/alert function with programmable high and low limit registers
Applications
- Industrial process control systems requiring multi-channel data acquisition
- Portable instrumentation and battery-powered measurement devices
- Smart transmitters and sensor interfaces
- Data acquisition modules in automated test equipment
Procurement Notes
Verify that the ordering suffix matches the required I2C speed mode; the '-1' suffix indicates support for high-speed mode up to 3.4 MHz, whereas '-0' is limited to 400 kHz. Confirm the reel packaging specification aligns with surface-mount assembly requirements. Ensure the external reference voltage applied to REFIN falls within the 1.2 V to VDD range for optimal performance.
Selection Notes
Select this component when a 12-bit resolution is required alongside an I2C interface for simplified system design. The AD7994 is suitable for applications needing simultaneous multi-channel sampling with low power consumption. Consider the AD7993 if 10-bit resolution suffices, or the AD7998 if eight channels are needed. Verify that the system clock frequency supports the desired throughput rate in the selected I2C mode.
Part Context
The AD7994 belongs to the AD7993/AD7994 family of 4-channel ADCs from Analog Devices. It shares the same pinout and core architecture as the AD7993 but offers higher 12-bit resolution. The device is part of a broader portfolio including the 2-channel AD7992 and 8-channel AD7998, all utilizing the same I2C-compatible interface and TSSOP packaging options.
Replacement Considerations
Direct functional equivalents include the AD7993BRU-1REEL for reduced resolution needs or the AD7998BRU-1REEL for increased channel count. Cross-reference with the AD7994BRU-0REEL if high-speed I2C mode is not required. Ensure any substitute maintains the 16-lead TSSOP footprint and compatible I2C addressing scheme.
