ADS7886
www.ti.com
SLAS492A – SEPTEMBER 2005 – REVISED NOVEMBER 2009
12-Bit, 1-MSPS, MICRO-POWER, MINIATURE
SAR ANALOG-TO-DIGITAL CONVERTERS
Check for Samples: ADS7886
FEATURES
APPLICATIONS
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1-MHz Sample Rate Serial Device
12-Bit Resolution
Zero Latency
20-MHz Serial Interface
Supply Range: 2.35 V to 5.25 V
Typical Power Dissipation at 1 MSPS:
– 3.9 mW at 3-V VDD
– 7.5 mW at 5-V VDD
INL ±1.25 LSB Maximum, ±0.65 LSB (Typical)
DNL ±1 LSB Maximum, +0.4 / -0.65 LSB
(Typical)
Typical AC Performance:
72.25 dB SINAD, -84 dB THD
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
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Base Band Converters in Radio
Communication
Motor Current/Bus Voltage Sensors in Digital
Drives
Optical Networking (DWDM, MEMS Based
Switching)
Optical Sensors
Battery Powered Systems
Medical Instrumentations
High-Speed Data Acquisition Systems
High-Speed Closed-Loop Systems
DESCRIPTION
The ADS7886 is a 12-bit, 1-MSPS analog-to-digital converter (ADC). The device includes 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 device operates from a wide supply range from 2.35 V to 5.25 V. The low power consumption of the device
makes it suitable for battery-powered applications. The device also includes a powerdown feature for power
saving 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 ADS7886 is available in 6-pin SOT23 and SC70 packages and is specified for operation from -40°C to
125°C.
Table 1. Micro-Power Miniature SAR Converter Family
BIT
< 300 KSPS
300 KSPS – 1.25 MSPS
12-Bit
ADS7866 (1.2 VDD to 3.6 VDD)
ADS7886 (2.35 VDD to 5.25 VDD)
10-Bit
ADS7867 (1.2 VDD to 3.6 VDD)
ADS7887 (2.35 VDD to 5.25 VDD)
8-Bit
ADS7868 (1.2 VDD to 3.6 VDD)
ADS7888 (2.35 VDD to 5.25 VDD)
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005–2009, Texas Instruments Incorporated
