Product Details
●The AD7887 is a high speed, low power, 12-bit analog-to-digital converter (ADC) that operates from a single 2.7 V to 5.25 V power supply. The AD7887 is capable of 125 kSPS throughput rate. The input track-and-hold acquires a signal in 500 ns and features a single-ended sampling scheme. The output coding for the AD7887 is straight binary, and the part is capable of converting full power signals of up to 2.5 MHz.
●The AD7887 can be configured for either dual- or single-channel operation via the on-chip control register. There is a default single-channel mode that allows the AD7887 to be operated as a read-only ADC. In single-channel operation, there is one analog input (AIN0) and the AIN1/VREF pin assumes its VREF function. This VREF pin allows the user access to the part’s internal 2.5 V reference, or the VREF pin can be overdriven by an external reference to provide the reference voltage for the part. This external reference voltage has a range of 2.5 V to VDD. The analog input range on AIN0 is 0 to VREF.
●In dual-channel operation, the AIN1/VREF pin assumes its AIN1 function, providing a second analog input channel. In this case, the reference voltage for the part is provided via the VDD pin. As a result, the input voltage range on both the AIN0 and AIN1 inputs is 0 to VDD.
●CMOS construction ensures low power dissipation of typically 2 mW for normal operation and 3 μW in power-down mode. The part is available in an 8-lead, 0.15-inch-wide narrow body SOIC and an 8-lead MSOP package.
●Product Highlights
● 1. Smallest 12-bit dual-/single-channel ADC; 8-lead MSOP package.
● 2. Lowest power 12-bit dual-/single-channel ADC.
● 3. Flexible power management options, including automatic power-down after conversion.
● 4. Read-only ADC capability.
● 5. Analog input range from 0 V to VREF.
● 6. Versatile serial input/output port (SPI/QSPI/MICROWIRE/ DSP compatible).
●Applications
● Battery-powered systems (personal digital assistants, medical instruments, mobile communications)
● Instrumentation and control systems
● High speed modems
●### Features and Benefits
● Specified for VDD of 2.7 V to 5.25 V
● Flexible power/throughput rate management
● Shutdown mode: 1 μA max
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● One or two single-ended inputs
● Serial interface: SPI®/QSPI™/MICROWIRE™/DSP compatible
● 8-lead narrow SOIC and MSOP packages
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