ADC78H90

Features:

·Eight input channels
·Variable power management
·Independent analog and digital supplies
·SPI™/QSPI™/MICROWIRE™/DSP compatible
·Packaged in 16-lead TSSOP




Application

·Automotive Navigation
·Portable Systems
·Medical Instruments
·Mobile Communications
·Instrumentation and Control Systems




Pinout






Specifications

Analog Supply Voltage AV_DD -0.3V to 6.5V
Digital Supply Voltage DV_DD -0.3V to AV_DD +
0.3V, max 6.5V
Voltage on Any Pin to GND-0.3V to AV_DD
+0.3V
Input Current at Any Pin (Note 3) ±10 mA
Package Input Current(Note 3)±20 mA
Power Dissipation at T_A = 25 See (Note 4)
ESD Susceptibility (Note 5)
Human Body Model2500V
Machine Model 250V
Soldering Temperature, Infrared,
10 seconds (Note 6) 260
Junction Temperature +150
Storage Temperature -65 to +150

Pin and Function Compatible Family	8 ch, TSSOP-16
Resolution	12 bits
Input Channels	8
Interface Type	SPI / QSPI / Microwire
Differential Input	No
Power Down, typ. at 3.6V	0.3 uW
Operating Power, 3.6V, 1ksps, max. PwrDn	1.8 mW
PowerWise Rating 1	0.13 pJ/conv
INL (LSB)	+/-0.4
DNL (LSB)	+0.6; -0.4
ENOB	11.8 bits
SINAD	73 dB
SNR	73 dB
Max KSample Rate	500 ksps
Min Supply Voltage	2.7 Volt
Max Supply Voltage	5.5 Volt
Reference Source	Supply
Temperature Min	-40 deg C
Temperature Max	85 deg C
Power Down	Yes
Input Sample/Hold	Yes
Special Features	Undefined
Data Converter Type	ADC
Max Sample Rate	0.5 MSPS
PowerWise	Yes
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Description

The ADC78H90 is a low-power, eight-channel CMOS 12-bit analog-to-digital converter with a conversion throughput of 500 kSPS. The converter is based on a successiveapproximation register architecture with an internal trackand- hold circuit. It can be configured to accept up to eight input signals at inputs AIN1 through AIN8.

The output serial data is straight binary, and is compatible with several standards, such as SPI^TM, QSPI^TM, MICROWIRE^TM, and many common DSP serial interfaces.

The ADC78H90 may be operated with independent analog and digital supplies. The analog supply (AVDD) can range from +2.7V to +5.25V, and the digital supply (DVDD) can range from +2.7V to AVDD. Normal power consumption using a +3V or +5V supply is 1.5 mW and 8.3 mW, respectively.

The power-down feature reduces the power consumption to just 0.3 µW using a +3V supply, or 0.5 µW using a +5V supply.
The ADC78H90 is packaged in a 16-lead TSSOP package. Operation over the industrial temperature range of -40 to +85 is guaranteed.