MCP3221 MCP3221 2 Low Power 12-Bit A/D Converter With I C Interface Features Description 12-bit resolution The Microchip Technology Inc. MCP3221 is a successive approximation A/D converter with 12-bit 1 LSB DNL, 2 LSB INL max. resolution. Available in the SOT-23-5 package, this 250 A max conversion current device provides one single-ended input with very low 5 nA typical standby current, 1 A max. power consumption. Based on an advanced CMOS 2 I C-compatible serial interface technology, the MCP3221 provides a low maximum 2 -100 kHz I C Standard Mode conversion current and standby current of 250 A and 2 -400 kHz I C Fast Mode 1A, respectively. Low current consumption, combined with the small SOT-23 package, make this Up to 8 devices on a single 2-Wire bus device ideal for battery-powered and remote data 2 22.3 ksps in I C Fast Mode acquisition applications. Single-ended analog input channel Communication to the MCP3221 is performed using a On-chip sample and hold 2 2-wire, I C compatible interface. Standard (100 kHz) On-chip conversion clock 2 and Fast (400 kHz) I C modes are available with the Single-supply specified operation: 2.7V to 5.5V device. An on-chip conversion clock enables 2 Temperature range: independent timing for the I C and conversion clocks. The device is also addressable, allowing up to eight - Industrial: -40C to +85C devices on a single 2-wire bus. - Extended: -40C to +125C The MCP3221 runs on a single supply voltage that Small SOT-23-5 package operates over a broad range of 2.7V to 5.5V. This device also provides excellent linearity of 1LSB Applications differential non-linearity and 2 LSB integral non-lin- Data Logging earity, maximum. Multi-zone Monitoring Functional Block Diagram Hand-Held Portable Applications Battery-Powered Test Equipment V V DD SS Remote or Isolated Data Acquisition Package Type DAC 5-Pin SOT-23 Comparator 12-bit SAR Sample SCL 5 V 1 DD A and + IN Hold Clock V 2 SS 2 Control Logic I C Interface 4 SDA A 3 IN SCL SDA 2002-2013 Microchip Technology Inc. DS21732D-page 1MCP3221 Stresses above those listed under Maximum ratings may 1.0 ELECTRICAL cause permanent damage to the device. This is a stress rating CHARACTERISTICS only and functional operation of the device at those or any other conditions above those indicated in the operational list- ings of this specification is not implied. Exposure to maximum Absolute Maximum Ratings rating conditions for extended periods may affect device V ...................................................................................7.0V reliability. DD Analog input pin w.r.t. V ..................... -0.6V to V +0.6V SS DD SDA and SCL pins w.r.t. V ..................-0.6V to V +1.0V SS DD Storage temperature .....................................-65C to +150C Ambient temp. with power applied ................-65C to +125C Maximum Junction Temperature.................................150C ESD protection on all pins (HBM) ................................. 4kV DC ELECTRICAL SPECIFICATIONS Electrical Characteristics: Unless otherwise noted, all parameters apply at V = 5.0V, V = GND, R = 2 k DD SS PU 2 T = -40C to +85C, I C Fast Mode Timing: f = 400 kHz (Note 3). AMB SCL Parameters Sym Min Typ Max Units Conditions DC Accuracy Resolution 12 bits Integral Nonlinearity INL 0.75 2 LSB Differential Nonlinearity DNL 0.5 1 LSB No missing codes Offset Error 0.75 2 LSB Gain Error -1 3 LSB Dynamic Performance Total Harmonic Distortion THD -82 dB V = 0.1V to 4.9V 1 kHz IN Signal-to-Noise and Distortion SINAD 72 dB V = 0.1V to 4.9V 1 kHz IN Spurious-Free Dynamic Range SFDR 86 dB V = 0.1V to 4.9V 1 kHz IN Analog Input Input Voltage Range V -0.3 V +0.3 V 2.7V V 5.5V SS DD DD Leakage Current -1 +1 A SDA/SCL (open-drain output): Data Coding Format Straight Binary High-level input voltage V 0.7 V V IH DD Low-level input voltage V 0.3 V V IL DD 0.4 VI = 3 mA, R = 1.53 k Low-level output voltage V OL OL PU Hysteresis of Schmitt trigger inputs V 0.05V V f = 400 kHz only HYST DD SCL Input leakage current I -1 +1 A V = 0.1 V and 0.9 V LI IN DD DD Output leakage current I -1 +1 A V = 0.1 V and LO OUT SS 0.9 V DD Pin capacitance C , 10 pFT = 25C, f = 1 MHz IN AMB (all inputs/outputs) C (Note 2) OUT Bus Capacitance C 400 pF SDA drive low, 0.4V B Note 1: Sample time is the time between conversions once the address byte has been sent to the converter. Refer to Figure 5-6. 2: This parameter is periodically sampled and not 100% tested. 3: R = Pull-up resistor on SDA and SCL. PU 4: SDA and SCL = V to V at 400 kHz. SS DD 5: t and t are dependent on internal oscillator timing. See Figure 5-5 and Figure 5-6 for relation to ACQ CONV SCL. DS21732D-page 2 2002-2013 Microchip Technology Inc.