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AD7918BRUZ-REEL7
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Product Detailed Parameters
- Description：IC ADC 10BIT SAR 20TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Number of Bits：10
- Sampling Rate (Per Second)：1M
- Number of Inputs：8
- Input Type：Single Ended
- Data Interface：SPI, DSP
- Configuration：MUX-S/H-ADC
- Ratio - S/H:ADC：1:01
- Number of A/D Converters：1
- Architecture：SAR
- Reference Type：External
- Voltage - Supply, Analog：2.7V ~ 5.25V
- Voltage - Supply, Digital：2.7V ~ 5.25V
- Features：-
- Operating Temperature：-40°C ~ 85°C
- Package / Case：20-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：20-TSSOP
- Mounting Type：Surface Mount
- Grade：-
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Overview
The AD7918BRUZ-REEL7 is an 8-channel, 10-bit successive approximation analog-to-digital converter (ADC) operating at a throughput rate of 1 MSPS. It features a wide input bandwidth track-and-hold amplifier and operates from a single 2.7 V to 5.25 V supply. The device includes a channel sequencer for preprogrammed sequential conversions and supports SPI/QSPI/MICROWIRE/DSP compatible serial interfaces. Power dissipation is 6 mW max at 3 V and 13.5 mW max at 5 V. It utilizes an external reference input and offers shutdown modes with current consumption as low as 0.5 μA.
Feature Summary
- Eight single-ended analog inputs managed by a programmable channel sequencer.
- Flexible power management with auto shutdown and full shutdown modes.
- VDRIVE function allows the serial interface to operate independently of the analog supply voltage.
- Standard successive approximation architecture with no pipeline delays.
Applications
- Industrial process control systems requiring multi-channel data acquisition.
- Battery-powered instrumentation benefiting from low power consumption.
- Data acquisition modules interfacing with microprocessors or DSPs.
Procurement Notes
Verify the specific suffix REEL7 corresponds to the tape and reel packaging format required for automated assembly. Confirm that the B version temperature range meets the operational environment requirements. Ensure the external reference voltage matches the specified 2.5 V ±1% for optimal performance.
Selection Notes
Select this component when eight single-ended channels are required within a 10-bit resolution constraint. Consider the AD7908 for lower resolution needs or the AD7928 for higher precision applications. Evaluate the VDRIVE pin configuration to ensure compatibility with the host processor logic levels without additional level shifting.
Part Context
This part belongs to the AD7908/AD7918/AD7928 family of high-speed, low-power ADCs. All members share identical pinouts, functional blocks, and serial interface protocols, differing primarily in resolution and dynamic performance specifications. This family is designed for applications demanding efficient multi-channel sampling in compact packages.
Replacement Considerations
The AD7908BRUZ-REEL7 and AD7928BRUZ-REEL7 are direct pin-compatible alternatives within the same datasheet. Substitution requires verifying that the resolution difference (8-bit or 12-bit) aligns with system accuracy requirements and checking if dynamic performance metrics meet design thresholds.
