ICmic TM ICM8010 1.2V , 750 KSPS, 10BIT SAR ADC IC MICROSYSTEMS FEATURES • • • • • • • • • 10-bit SAR ADC Single supply - Single channel Fast throughput of 750 kSPS Analog input range: 0V to 1.2V Temperature range: −40°C to +85°C Specified for VDD of 0.9V to 1.32V Internal power-on reset Typical power consumption 0.6mW 8-lead TSSOP APPLICATIONS • • • • • • Battery Powered Systems Medical Instrumentation Digital Power Supplies Touch Screen Controllers Data Acquisition Systems Automotive OVERVIEW The ICM8010 is a 10-bit 750 kSPS through put rate SAR Analog-to-Digital Converter with a uni-polar, single-ended input. It has Successive Approximation Register (SAR) architecture and can sample the analog input. It has a flexible serial interface. BLOCK DIAGRAM REFIN VIN ICM8010 R-DAC C-DAC COMPARATOR Successive Approximation Register (SAR) CSB Rev. A ICmic reserves the right to change specifications without prior notice DOUT DCLK 1 ICmic TM ICM8010 1.2V , 750 KSPS, 10BIT SAR ADC IC MICROSYSTEMS PACKAGE 8-Pin TSSOP VDD NC VREF CSB VIN DCLK GND DOUT PIN DESCRIPTION Pin No Symbol Description 1 2 3 4 5 6 7 8 VDD VREF VIN GND DOUT DCLK CSB NC Power Supply Input. Range is from 0.9V to 1.32V Reference input Analog Input Ground Serial Data output, clocked out on falling edge of CLK External CLK Input Chip Select input Active Low. Initiates conversion and enables serial data. No connection ABSOLUTE MAXIMUM RATING Symbol Parameter Value Unit VDD IIN VIN_ VIN_REF TSTG TSOL Supply Voltage Input Current Digital Input Voltage Reference Input Voltage Storage Temperature Soldering Temperature -0.3 to 1.5 +/- 50.0 -0.3 to 1.2 -0.3 to 1.5 -65 to +150 300 V mA V V o C o C Note: Stress greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Rev. A ICmic reserves the right to change specifications without prior notice 2 ICmic TM ICM8010 1.2V , 750 KSPS, 10BIT SAR ADC IC MICROSYSTEMS ORDERING INFORMATION Part Temperature Range ICM8010 o o -40 C to 85 C Package 8-Pin TSSOP DC ELECTRICAL CHARACTERISTICS (VDD = 1.2V, Maximum Sample Rate, REF = 1.2V; all specifications TMIN to TMAX unless otherwise noted) Symbol Parameter Test Conditions Min Typ Max Unit DC PERFORMANCE N No Missing Codes INL GE OE VDD IVDD ISHTDOWN Symbol Fsample TCLK TDelay RIN IREF Note 1: Note 2: Note 3: Rev. A Resolution Integral Nonlinearity Gain Error Offset Error Supply Voltage Supply Current Supply Current Parameter (Note 1) 10 Bits (Note 1) 10 Bits (Note 1) (Note 1) (Note 1) POWER REQUIREMENTS (Note 2) (Note 1) (Note 1) Test Conditions 0.9 Min SWITCHING SPECIFICATIONS (CLK INPUT) Maximum Conversion Rate (Note 2) Minimum Conversion Rate (Note 2) 1 CLK Period (Note 2) 82 Pulse-width High (Note 2) 41 Pulse-width Low (Note 2) 41 Data out Delay (Note 2) REFERENCE Reference Input Resistance (Note 1) Reference Input Span Reference Input Current 1.2 500 50 Typ 0.75 1.1 25 % of FSR % of FS mV 1.32 V µA µA Max Unit 750 kSPS kSPS ns ns ns ns 15 8.5 VDD 150 kΩ V µA 100 % Production Tested at 25 C; guaranteed by design and characterization testing for temperature range. Guaranteed by design & characterization testing. See Applications Information. ICmic reserves the right to change specifications without prior notice 3 ICmic TM ICM8010 1.2V , 750 KSPS, 10BIT SAR ADC IC MICROSYSTEMS TIMING DIAGRAM DETAILED DESCRIPTION APPLICATIONS INFORMATION The ICM8010 is a micropower 1.2V single supply 10-Bit 750 kSPS SAR architecture ADC. It operates on a 0.9V to 1.32V single supply and consumes about 500µA supply current when operating on a 12MHz external clock. The output throughput rate is a maximum of 750 kSPS when the DCLK is running at at the maximum frequency of 12MHz. The ICM8010 has a single ended analog input which can swing from GND to VDD. The reference input has a range from GND to VDD and can be tied to VDD for largest input range. The ADC is composed of a high performance capacitive DAC and a comparator along with SAR control logic and resistor string segment. The reference input drives the resistor string directly and has an input resistance of around 8.5 kΩ. One complete conversion cycle of the ICM8010 will take 16 clock cycles. As CSB is pulled low the ADC powers up and initiates a sampling/conversion cycle. Data is clocked out MSB first on the falling edge of the DCLK input. The analog input is sampled on the first four clock pulses and then conversion process begins. The DOUT is available from the falling edge of the 5th DCLK pulse MSB first and the LSB is available on the falling edge of the 14th DCLK pulse. Since there is some propagation delay the DOUT should be sampled on the rising edge of the following clock pulse. The ICM8010 comes complete with a high performance CMOS sample and hold amplifier made up by the capacitive DAC. There is shutdown capability which is active between conversions when CSB is high. The converter will shut down to under 50 µA of supply current. Rev. A The ICM8010 uses the DCLK as the external clock and this controls all the transfer of information to and from the ADC. ICmic reserves the right to change specifications without prior notice 4 ICmic TM ICM8010 1.2V , 750 KSPS, 10BIT SAR ADC IC MICROSYSTEMS PACKAGE INFORMATION 8 LEAD TSSOP SOP STANDARD PACKAGE Rev. A ICmic reserves the right to cha hange specifications without prior notice 5