ADS7887
- 1.25-MHz Sample Rate Serial Device
- 10-Bit Resolution (ADS7887)
- 8-Bit Resolution (ADS7888)
- Zero Latency
- 25-MHz Serial Interface
- Supply Range: 2.35 V to 5.25 V
- Typical Power Dissipation at 1.25 MSPS:
- 3.8 mW at 3-V VDD
- 8 mw at 5-V VDD
- ±0.35 LSB INL, DNL (ADS7887)
- ±0.15 LSB INL, ±0.1 LSB DNL (ADS7888)
- 61 dB SINAD, –84 dB THD (ADS7887)
- 49.5 dB SINAD, –67.5 dB THD (ADS7888)
- Unipolar Input Range: 0 V to VDD
- Power-Down Current: 1 µA
- Wide Input Bandwidth: 15 MHz at 3 dB
- 6-Pin SOT23 and SC70 Packages
All trademarks are the property of their respective owners.
The ADS7887 device is a 10-bit, 1.25-MSPS, analog-to-digital converter (ADC), and the ADS7888 device is a 8-bit, 1.25-MSPS ADC. These devices include a capacitor-based SAR A/D converter with inherent sample and hold. The serial interface in each device is controlled by the CS and SCLK signals for glueless connections with microprocessors and DSPs. The input signal is sampled with the falling edge of CS, and SCLK is used for conversion and serial data output.
The devices operate from a wide supply range from 2.35 V to 5.25 V. The low power consumption of the devices make them suitable for battery-powered applications. The devices also include a power-saving, power-down feature for when the devices are operated at lower conversion speeds.
The high level of the digital input to the device is not limited to device VDD. This means the digital input can go as high as 5.25 V when device supply is 2.35 V. This feature is useful when digital signals are coming from other circuit with different supply levels. Also this relaxes restriction on power-up sequencing.
The ADS7887 and ADS7888 are available in 6-pin SOT-23 and SC70 packages and are specified for operation from –40°C to 125°C.
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Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | ADS788x 10-Bit, 8-Bit, 1.25-MSPS, Micro-Power, Miniature SAR Analog-to-Digital Converters datasheet (Rev. A) | PDF | HTML | 24 Aug 2016 |
E-book | Best of Baker's Best: Precision Data Converters -- SAR ADCs | 21 May 2015 | ||
Application note | Determining Minimum Acquisition Times for SAR ADCs, part 2 | 17 Mar 2011 | ||
Application note | Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A) | 10 Nov 2010 | ||
EVM User's guide | ADS788xEVM Users Guide (Rev. B) | 28 Aug 2008 |
Design & development
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ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
Supported products & hardware
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Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
SOT-23 (DBV) | 6 | Ultra Librarian |
SOT-SC70 (DCK) | 6 | Ultra Librarian |
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