MAX1221BETX Maxim Integrated Products, MAX1221BETX Datasheet
MAX1221BETX
Available stocks
Related parts for MAX1221BETX
MAX1221BETX Summary of contents
Page 1
... Closed-Loop Controls for Optical Components and Base Stations System Supervision and Control Data-Acquisition Systems PART PIN-PACKAGE VOLTAGE MAX1221BETX 36 Thin QFN-EP* MAX1223BETX 36 Thin QFN-EP* MAX1343BETX 36 Thin QFN-EP* Note: All devices are specified over the -40°C to +85°C operating temperature range Exposed pad. ...
Page 2
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ABSOLUTE MAXIMUM RATINGS AV to AGND .........................................................-0.3V to +6V DD DGND to AGND.....................................................-0.3V to +0. .......................................................-3.0V to +0. Digital Inputs to DGND.............................................-0.3V to +6V Digital ...
Page 3
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ELECTRICAL CHARACTERISTICS (continued) ( 2.7V to 5.25V, external reference wise noted. Typical values are PARAMETER SYMBOL Acquisition Time t ACQ Conversion ...
Page 4
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ELECTRICAL CHARACTERISTICS (continued) ( 2.7V to 5.25V, external reference wise noted. Typical values are PARAMETER SYMBOL REF1 Input Current (Note 9) ...
Page 5
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ELECTRICAL CHARACTERISTICS (continued) ( 2.7V to 5.25V, external reference wise noted. Typical values are PARAMETER SYMBOL Wake-Up Time (Note 12) 1kΩ ...
Page 6
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ELECTRICAL CHARACTERISTICS (continued) ( 2.7V to 5.25V, external reference wise noted. Typical values are PARAMETER SYMBOL Output-Voltage High V Tri-State Leakage ...
Page 7
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ELECTRICAL CHARACTERISTICS (continued) ( 2.7V to 5.25V, external reference wise noted. Typical values are PARAMETER SYMBOL ADC Positive-Supply Rejection TIMING CHARACTERISTICS ...
Page 8
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ELECTRICAL CHARACTERISTICS (continued) ( 2.7V to 5.25V, external reference wise noted. Typical values are Note 1: Tested ...
Page 9
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ( external V = 2.5V REF REF +25°C, unless otherwise noted.) A ADC INTEGRAL NONLINEARITY vs. OUTPUT CODE 1.00 0.75 0.50 ...
Page 10
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ( external V = 2.5V REF REF +25°C, unless otherwise noted.) A ANALOG SUPPLY CURRENT vs. ANALOG SUPPLY VOLTAGE 2.04 2.02 ...
Page 11
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ( external V = 2.5V REF REF +25°C, unless otherwise noted.) A DAC FULL-SCALE ERROR vs. REFERENCE VOLTAGE 1. ...
Page 12
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ( external V = 2.5V REF REF +25°C, unless otherwise noted.) A ADC IMD PLOT 5.24288MHz CLK f ...
Page 13
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ( external V = 2.5V REF REF +25°C, unless otherwise noted.) A GPIO OUTPUT VOLTAGE vs. SINK CURRENT 1500 GPIOC0, GPIOC1 ...
Page 14
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ( external V = 2.5V REF REF +25°C, unless otherwise noted.) A DYNAMIC RESPONSE FALL TIME (R = 10kΩ, C LOAD ...
Page 15
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports ( external V = 2.5V REF REF +25°C, unless otherwise noted.) A NEGATIVE FULL-SCALE SETTLING TIME (R = 10kΩ, C LOAD ...
Page 16
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports PIN MAX1221 MAX1223 MAX1343 1, 2 — GPIOA0, GPIOA1 General-Purpose I/O A0, A1. GPIOA0, A1 can sink and source 15mA. — 1 — ...
Page 17
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports PIN MAX1221 MAX1223 MAX1343 23, 25, — 27–31, — 33, 34 27–31, 34 — 27–31 — — 36 — 36 — — ...
Page 18
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Detailed Description The MAX1221/MAX1223/MAX1343 integrate a multi- channel 12-bit ADC, and an octal/quad 12-bit DAC in a single IC. The devices also include a temperature sen- sor and configurable GPIOs ...
Page 19
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports GPIOA0, GPIOC0, GPIOC1 GPIOA1 USER-PROGRAMMABLE CONTROL I/O OSCILLATOR SCLK CS DIN DOUT TEMPERATURE SENSOR EOC LOGIC CONTROL CNVST AIN0 12-BIT FIFO AND SAR T/H AIN5 ALU ADC REF2/ AIN6 CNVST/ ...
Page 20
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Table 1. Command Byte (MSB First) REGISTER NAME BIT 7 Conversion 1 Setup 0 ADC Averaging 0 DAC Select 0 Reset 0 GPIO Configure* 0 GPIO Write* 0 GPIO Read* ...
Page 21
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports the setup register. See Figures 3 and 4 for the transfer- function graphs. Program a pair of analog inputs for dif- ferential operation by writing a one to the appropriate ...
Page 22
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports LSB per degree. See the Temperature Measurements section for details on converting the digital code to a tem- perature. In addition to the 12-bit ADC, the MAX1221/MAX1223/ MAX1343 also include ...
Page 23
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports The MAX1221/MAX1223/MAX1343 can operate from an internal oscillator. The internal oscillator is active in clock modes 00, 01, and 10. Figures 6, 7, and 8 show how to start an ...
Page 24
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Channels 8–11 are invalid. Any scans or averages on these channles can cause corrupt data. Select scan mode return one result per sin- gle-ended channel and ...
Page 25
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Table 5. Setup Register* BIT NAME BIT — 7 (MSB) — 6 CKSEL1 5 CKSEL0 4 REFSEL1 3 REFSEL0 2 DIFFSEL1 1 DIFFSEL0 0 (LSB) * See below for bit ...
Page 26
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Table 5c. Clock Mode 11 VOLTAGE REFSEL1 REFSEL0 REFERENCE Internal (DAC 0 0 and ADC) External single- ended (REF1 0 1 for DAC and REF2 for ADC) Internal (ADC) and ...
Page 27
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Table 6. Unipolar-Mode Register (Addressed Through the Setup Register) BIT NAME BIT UCH0/1 7 (MSB) Configure AIN0 and AIN1 for unipolar differential conversion. UCH2/3 6 Configure AIN2 and AIN3 for ...
Page 28
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Unipolar/Bipolar Registers The final 2 bits (LSBs) of the setup register control the unipolar-/bipolar-mode address registers. Set DIFFSEL[1: write to the unipolar-mode regis- ter. Set bits DIFFSEL[1:0] ...
Page 29
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Table 9 details the four scan modes available in the ADC conversion register. All four scan modes allow averaging as long as the AVGON bit, bit 4 in the averaging ...
Page 30
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Write a command byte to the GPIO command register to configure, write, or read the GPIOs, as detailed in Table 12. Write the command byte 00000011 to configure the GPIOs. ...
Page 31
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Table 17. DAC Serial-Interface Configuration 16-BIT SERIAL WORD MSB CONTROL BITS D11 D10 ...
Page 32
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Table 17. DAC Serial-Interface Configuration (continued) 16-BIT SERIAL WORD MSB CONTROL BITS D11 D10 — — — — DAC DAC ...
Page 33
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports and forces them to a high-impedance state. DAC out- puts 0 and 1 remain in their previous state. Output-Data Format Figures 6–9 illustrate the conversion timing for the MAX1221/MAX1223/MAX1343. All ...
Page 34
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports CNVST CS SCLK DOUT EOC Figure 6. Clock Mode 00—After writing a command byte, set CNVST low for at least 40ns to begin a conversion. t CSW CNVST (ACQUISITION 1) ...
Page 35
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports DIN CS SCLK DOUT t DOV EOC Figure 8. Clock Mode 10—The command byte to the conversion register begins the acquisition (CNVST is not required). Externally Timed Acquisitions and Internally ...
Page 36
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports DIN (ACQUISITION1) CS SCLK DOUT EOC Figure 9. Clock Mode 11—Externally Timed Acquisition, Sampling, and Conversion without CNVST Internally Timed Acquisitions and Conversions Using the Serial Interface ADC Conversions in ...
Page 37
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports SCLK DIN D15 D14 t DOE D15 DOUT D7 t CSS t CSPWH CS Figure 10. DAC/GPIO Serial-Interface Timing (Clock Modes 00, 01, and ...
Page 38
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports SCLK D15 DIN t DOE D15 DOUT D7 t CSS t CSPWH CS Figure 11. DAC/GPIO Serial-Interface Timing (Clock Mode 11) SCLK 1 2 ...
Page 39
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports CS t GSU GPIO INPUT/OUTPUT Figure 13. GPIO Timing LDAC OUT_ Figure 14. LDAC Functionality Layout, Grounding, and Bypassing For best performance, use PC boards. Ensure that digital and analog ...
Page 40
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports Bipolar ADC Offset Error While in bipolar mode, the ADC’s ideal midscale transi- tion occurs at AGND -0.5 LSB. Bipolar offset error is the measured deviation from this ideal value. ...
Page 41
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports DAC Digital Feedthrough DAC digital feedthrough is the amount of noise that appears on the DAC output when the DAC digital con- trol lines are toggled. ADC Power-Supply Rejection ADC ...
Page 42
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports TOP VIEW GPIOA0 1 GPIOA1 2 EOC DGND 5 MAX1221 DOUT 6 SCLK 7 DIN 8 OUT0 9 THIN QFN TOP VIEW 42 ______________________________________________________________________________________ AIN0 27 ...
Page 43
Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) ______________________________________________________________________________________ Package Information 43 ...
Page 44
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 44 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products DESCRIPTION is a registered trademark of Maxim Integrated Products, Inc ...