Datasheet AD7888 (Analog Devices)

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2.7 V to 5.25 V, Micropower, 8-Channel, 125 kSPS, 12-Bit ADC in 16-Lead TSSOP AD7888 FEATURES FUNCTIONAL BLOCK DIAGRAM Specified for VDD of 2.7 V to 5.25 V Flexible Power/Throughput Rate Management AD7888 Shutdown Mode: 1
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A Max AIN1 I/P Eight Single-Ended Inputs MUX T/H V AIN8 DD Serial Interface: SPI™/QSPI™/MICROWIRE™/DSP Compatible 2.5V COMP 16-Lead Narrow SOIC and TSSOP Packages REF APPLICATIONS REF IN/REF OUT BUF Battery-Powered Systems (Personal Digital Assistants, Medical Instruments, Mobile Communications) CHARGE Instrumentation and Control Systems REDISTRIBUTION DAC High-Speed Modems SAR + ADC CONTROL LOGIC AGND AGND GENERAL DESCRIPTION
The AD7888 is a high speed, low power, 12-bit ADC that oper-
SPORT
ates from a single 2.7 V to 5.25 V power supply. The AD7888 is capable of a 125 kSPS throughput rate. The input track-and-
CS DIN DOUT SCLK
hold acquires a signal in 500 ns and features a single-ended sampling scheme. The AD7888 contains eight single-ended analog inputs, AIN1 through AIN8. The analog input on each
PRODUCT HIGHLIGHTS
of these channels is from 0 to VREF. The part is capable of con- 1. Smallest 12-bit 8-channel ADC; 16-lead TSSOP is the same verting full power signals up to 2.5 MHz. area as an 8-lead SOIC and less than half the height. The AD7888 features an on-chip 2.5 V reference that can be 2. Lowest Power 12-bit 8-channel ADC. used as the reference source for the A/D converter. The REF 3. Flexible power management options including automatic IN/REF OUT pin allows the user access to this reference. Alter- power-down after conversion. natively, this pin can be overdriven to provide an external refer- ence voltage for the AD7888. The voltage range for this external 4. Analog input range from 0 V to VREF (VDD). reference is from 1.2 V to VDD. 5. Versatile serial I/O port (SPI/QSPI/MICROWIRE/DSP CMOS construction ensures low power dissipation of typically Compatible). 2 mW for normal operation and 3 µW in power-down mode. The part is available in a 16-lead narrow body small outline (SOIC) and a 16-lead thin shrink small outline (TSSOP) package. SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corporation. REV. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that
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