19-4484; Rev 0; 4/09 Low-Charge Injection, 16-Channel, High-Voltage Analog Switches The MAX14800–MAX14803 provide high-voltage switching on 16 channels for ultrasonic imaging and printer applications. The devices utilize HVCMOS process technology to provide 16 high-voltage lowcharge-injection SPST switches, controlled by a digital interface. Data is clocked into an internal 16-bit shift register and retained by a programmable latch with enable and clear inputs. A power-on reset function ensures that all switches are open on power-up. The MAX14800–MAX14803 operate with a wide range of high-voltage supplies including: VPP/VNN = +100V/ -100V, +200V/0V, and +40V/-160V. The digital interface operates from a separate +2.7V to +5.5V VDD supply. Digital inputs DIN, CLK, LE, and CLR operate on the VDD supply voltage. The MAX14801/MAX14803 provide integrated 35kΩ bleed resistors on each switch terminal to discharge capacitive loads. The MAX14802/MAX14803 provide integrated clamping diodes for overvoltage protection against positive overshoot. The MAX14800–MAX14803 are available in the 48-pin TQFP package. All devices are specified for the commercial 0°C to +70°C temperature range. Features o Integrated Overvoltage Protection (MAX14802/ MAX14803) o 20MHz Serial Interface (5V) o HVCMOS Technology for High Performance o Individually Programmable High-Voltage Analog Switches o Very Low 5µA (typ) Quiescent Current o DC-to-20MHz Low-Voltage Analog Signal Frequency Range o 2.7V to 5.5V Logic Supply Voltage o Low-Charge Injection, Low-Capacitance RL Switches o -77dB (typ) Off-Isolation at 5MHz (RL = 50Ω) o Daisy-Chainable Serial Interface o Flexible High-Voltage Supplies (VPP - VNN = 250V) Applications Ultrasound Imaging Pin Configuration appears at end of data sheet. Printers Ordering Information/Selector Guide PART SWITCH CHANNELS BLEED RESISTOR OVP SECOND SOURCE PIN-PACKAGE TEMP RANGE 0°C to +70°C MAX14800CCM+* 16 No No HV2601 48 TQFP MAX14801CCM+* 16 Yes No HV2701 48 TQFP 0°C to +70°C MAX14802CCM+ 16 No Yes — 48 TQFP 0°C to +70°C MAX14803CCM+ 16 Yes Yes — 48 TQFP 0°C to +70°C +Denotes a lead(Pb)-free/RoHS-compliant package. *Future product—contact factory for availability. Parts with extended temperature range (-40°C to +85°C) are available upon request. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX14800–MAX14803 General Description MAX14800–MAX14803 Low-Charge Injection, 16-Channel, High-Voltage Analog Switches ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) VDD Logic-Supply Voltage .......................................-0.3V to +7V VPP - VNN Supply Voltage ....................................................260V VPP Positive-Supply Voltage.................................-0.3V to +220V VNN Negative-Supply Voltage ...............................-0.3V to -220V Logic Inputs (LE, CLR, CLK, DIN, DOUT)................-0.3V to +7V COM_, NO_ (MAX14800/MAX14801) ...........(-0.3V + VNN) to (VNN + 200V) COM_, NO_ (MAX14802/MAX14803).........(-0.3V + VNN) to the minimum of [(VNN + 200V) or (VPP + 0.3V)] Peak Analog Signal Current Per Channel ................................3A Continuous Power Dissipation (TA = +70°C) 48-Pin TQFP (derate 22.7mW/°C above +70°C).........1818mW Junction-to-Ambient Thermal Resistance (θJA) (Note 1) 48-Pin TQFP ..................................................................44°C/W Junction-to-Case Thermal Resistance (θJC) (Note 1) 48-Pin TQFP ..................................................................10°C/W Operating Temperature Range...............................0°C to +70°C Storage Temperature Range .............................-65°C to +150°C Junction Temperature ..................................................... +150°C Lead Temperature (soldering, 10s) .................................+300°C Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VDD = +2.7V to +5.5V, VPP = +40V to VNN + 250V, VNN = -40V to -160V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS +5.5 V POWER SUPPLIES VDD Supply Voltage VDD +2.7 VPP Supply Voltage VPP +40 +100 VNN + 250 V VNN Supply Voltage VNN -160 -100 0 V VDD Supply Quiescent Current IDDQ 5 µA 0.5 mA 10 µA VDD Supply Dynamic Current IDD VDD = +5V, LE = +5V, fCLK = 5MHz VPP Supply Quiescent Current IPPQ All switches remain on or off, ICOM_ = 5mA VPP Supply Dynamic Current (All Channel Switching Simultaneously) VNN Supply Quiescent Current VNN Supply Dynamic Current (All Channel Switching Simultaneously) 0 VPP = +40V, VNN = -160V, fCOM_ = 50kHz IPP 4 VPP = +100V, VNN = -100V, fCOM_ = 50kHz 3.4 6 VPP = +160V, VNN = -40V, fCOM_ = 50kHz INNQ 8 All switches remain on or off, ICOM_ = 5mA 0 10 VPP = +40V, VNN = -160V, fCOM_ = 50kHz INN mA µA 5 VPP = +100V, VNN = -100V, fCOM_ = 50kHz 2.3 4 VPP = +160V, VNN = -40V, fCOM_ = 50kHz mA 3 ANALOG SWITCH COM_, NO_ Analog Signal Range 2 VCOM_, VNO_ (Note 3) VNN min of (VNN + 200V) or (VPP 10V) _______________________________________________________________________________________ V Low-Charge Injection, 16-Channel, High-Voltage Analog Switches (VDD = +2.7V to +5.5V, VPP = +40V to VNN + 250V, VNN = -40V to -160V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS TYP MAX ICOM_ = 5mA 26 48 ICOM_ = 200mA 22 32 VPP = +100V, VNN = -100V, ICOM_ = 5mA VCOM_ = 0 ICOM_ = 200mA 22 30 18 27 ICOM_ = 5mA 20 30 ICOM_ = 200mA 16 27 VPP = +40V, VNN = -160V, VCOM_ = 0 Small-Signal Switch On-Resistance RONS VPP = +160V, VNN = -40V, VCOM_ = 0 Small-Signal Switch On-Resistance Matching ∆RONS Ω 5 % 15 Ω RONL VCOM_ = VPP - 10V, ICOM_ = 1A Shunt Resistance RINT NO_ or COM_ to GND (MAX14801/MAX14803), switch off ICOM_(OFF), INO_(OFF) UNITS VPP = +100V, VNN = -100V, VCOM_ = 0, ICOM_ = 5mA Large-Signal Switch On-Resistance Switch-Off Leakage MIN 30 VCOM_, VNO_ = +100V or unconnected Switch-Off DC Offset RL = 100kΩ Switch-Output Peak Current (Note 4) 100ns pulse width, 0.1% duty cycle Switch-Output COM_ Isolation Diode Current (Note 4) 300ns pulse width, 2% duty cycle (MAX14802/MAX14803) 40 50 kΩ 0 2 µA +30 mV -30 3 A 500 mA SWITCH DYNAMIC CHARACTERISTICS Turn-On Time tON VNO_ = +100V, RL = 10kΩ, VNN = -100V 2 3.5 µs Turn-Off Time tOFF VNO_ = +100V, RL = 10kΩ, VNN = -100V 2 3.5 µs Output Switching Frequency fSW Duty cycle = 50% 50 kHz Maximum VCOM_, VNO_ Slew Rate dV/dt Off-Isolation VISO Crosstalk VCT (Note 4) -50 f = 5MHz, RL = 50Ω -77 f = 5MHz, RL = 50Ω -80 CCOM_(OFF), VCOM_ = 0, VNO_ = 0, f = 1MHz CNO_(OFF) COM_ On-Capacitance (Note 4) CCOM_(ON) VSPK Small-Signal Analog Bandwidth fBW V/ns f = 5MHz, RL = 1kΩ, CL = 15pF COM_, NO_ OffCapacitance (Note 4) Output-Voltage Spike (Note 4) 20 VCOM_ = 0, f = 1MHz RL = 50Ω VPP = +100V, VNN = -100V, CL = 200pF dB dB 4 11 18 pF 20 36 56 pF +150 mV -150 20 MHz _______________________________________________________________________________________ 3 MAX14800–MAX14803 ELECTRICAL CHARACTERISTICS (continued) MAX14800–MAX14803 Low-Charge Injection, 16-Channel, High-Voltage Analog Switches ELECTRICAL CHARACTERISTICS (continued) (VDD = +2.7V to +5.5V, VPP = +40V to VNN + 250V, VNN = -40V to -160V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER Charge Injection SYMBOL CONDITIONS Q MIN TYP VPP = +40V, VNN = -160V, VCOM_ = 0 820 VPP = +100V, VNN = -100V, VCOM_ = 0 600 VPP = +160V, VNN = -40V, VCOM_ = 0 350 MAX UNITS pC LOGIC LEVELS Logic-Input Low Voltage VIL 0.75 Logic-Input High Voltage VIH Logic-Output Low Voltage VOL ISINK = 1mA Logic-Output High Voltage VOH ISOURCE = 0.75mA Logic-Input Capacitance (Note 4) CIN Logic-Input Leakage IIN VDD 0.75 V V 0.4 VDD 0.5 V V -1 10 pF +1 µA TIMING CHARACTERISTICS (VDD = +2.7V to +5.5V, VPP = +40V to VNN + 200V, VNN = -40V to -160V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS LOGIC TIMING (Figure 1) CLK Frequency fCLK DIN to CLK Setup Time tDS DIN to CLK Hold Time tDH CLK to LE Setup Time tCS LE Low-Pulse Width tWL CLR High-Pulse Width tWC CLK Rise and Fall Times tR, tF CLK to DOUT Delay tDO VDD = +5V ±10% 20 VDD = +3V ±10% 10 VDD = +5V ±10% 10 VDD = +3V ±10% 16 VDD = +5V ±10% 3 VDD = +3V ±10% 3 VDD = +5V ±10% 36 VDD = +3V ±10% 65 VDD = +5V ±10% 14 VDD = +3V ±10% 22 VDD = +5V ±10% 20 VDD = +3V ±10% 40 MHz ns ns ns ns ns VDD = +5V ±10% 50 VDD = +3V ±10% 50 VDD = +5V ±10% 6 42 VDD = +3V ±10% 12 80 ns ns Note 2: All devices are 100% tested at TA = +70°C. Limits over the operating temperature range are guaranteed by design and characterization. Note 3: The analog signal input VCOM_ and VNO_ must satisfy VNN ≤ (VCOM_, VNO_) ≤ VPP, or remain unconnected during power-up and power-down. Note 4: Guaranteed by characterization; not production tested. 4 _______________________________________________________________________________________ Low-Charge Injection, 16-Channel, High-Voltage Analog Switches VPP - 10V ISOL +100V -100V RL 100kΩ NO_ NO_ VOUT COM_ COM_ COM_ RL 100kΩ MAX14800– MAX14803 MAX14800– MAX14803 +100V NO_ VOUT VPP VPP VDD VNN VNN GND 5V VPP VPP VDD VNN VNN GND 5V VPP VPP VDD VNN VNN GND -100V DC OFFSET ON/OFF VOUT = 10VP-P AT 5MHz VOUT = 10VP-P AT 5MHz COM_ VOUT COM_ MAX14800– MAX14803 VDD VPP VNN 5V GND NO_ COM_ VNN COM_ 50Ω MAX14800– MAX14803 MAX14800– VNN MAX14803 VPP VPP VDD VNN VNN GND V VISO = 20LOG OUT VIN OFF ISOLATION NO_ 50Ω IID NO_ RL VNN tON/tOFF TEST CIRCUIT VPP NO_ VPP 5V -100V SWITCH OFF LEAKAGE VOUT MAX14800– MAX14803 +100V 5V VPP VPP VDD VNN VNN GND 5V V VCT = 20LOG OUT VIN CROSSTALK ISOLATION DIODE CURRENT +VSPK VOUT VOUT NO_ VOUT NO_ -VSPK 100pF 50Ω COM_ VCOM_ COM_ RL 1kΩ MAX14800– MAX14803 VPP VPP VDD VNN VNN GND Q = 1000pF x VOUT VDD MAX14800– MAX14803 VPP VPP VDD VNN VNN GND 5V OUTPUT-VOLTAGE SPIKE CHARGE INJECTION _______________________________________________________________________________________ 5 MAX14800–MAX14803 Test Circuits Typical Operating Characteristics (VDD = +3V, VPP = +100V, VNN = -100V, TA = +25°C, unless otherwise noted.) 100 VPP = +40V, VNN = -160V 60 100 80 60 TA = +70°C TA = +25°C 40 40 20 20 0 0 -100 -50 0 50 100 150 -100 0 50 3 tOFF 2 1 0 -90 100 -60 -30 0 30 60 VCOM (V) VCOM (Ω) VNO (V) OFF-ISOLATION vs. FREQUENCY LEAKAGE CURRENT vs. TEMPERATURE LOGIC SUPPLY CURRENT vs. SUPPLY VOLTAGE -40 TA = +25°C TA = +70°C 4.5 LEAKAGE CURRENT (nA) -20 ICOM_(ON) (VCOM = +90V) ICOM_(ON) (VCOM = -90V) ICOM_(ON) (VCOM = 0) 4.0 3.5 ICOM_(OFF) (VCOM = -90V) 3.0 ICOM_(OFF) (VCOM = 0) 2.5 90 0.8 MAX14800 toc06 5.0 MAX14800 toc04 0 -60 -50 4 tON TA = 0°C 0.7 IDDQ SUPPLY CURRENT (µA) -150 OFF-ISOLATION (dB) 120 5 MAX14800 toc03 140 MAX14800 toc05 ON-RESISTANCE (Ω) VPP = +100V, VNN = -100V 80 VPP = +100V, VNN = -100V ON-RESISTANCE (Ω) VPP = +160V, VNN = -40V MAX14800 toc02 160 120 160 MAX14800 toc01 180 140 TURN-ON/TURN-OFF TIME vs. ANALOG SIGNAL VOLTAGE ON-RESISTANCE vs. ANALOG SIGNAL VOLTAGE TURN-ON/TURN-OFF TIME (µs) ON-RESISTANCE vs. ANALOG SIGNAL VOLTAGE ICOM_(OFF) (VCOM = +90V) 0.6 0.5 TA = +70°C 0.4 0.3 TA = +25°C 0.2 TA = 0°C 0.1 TA = 0°C -80 0.001 2.0 0.01 0.1 1 10 100 0 0 10 20 30 40 50 60 70 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 FREQUENCY (MHz) TEMPERATURE (°C) VDD SUPPLY VOLTAGE (V) HIGH-VOLTAGE SUPPLY CURRENT vs. TEMPERATURE LOGIC SUPPLY CURRENT vs. SERIAL-CLOCK FREQUENCY HIGH-VOLTAGE SUPPLY CURRENT vs. SWITCHING FREQUENCY IPP 0.10 INN 0.05 200 8 TA = +25°C 150 TA = 0°C 100 MAX14800 toc09 TA = +70°C ALL SWITCHES SWITCHING TA = +25°C SUPPLY CURRENT (mA) 0.15 250 MAX14800 toc08 VPP = +100V VNN = -100V IDD SUPPLY CURRENT (µA) MAX14800 toc07 0.20 SUPPLY CURRENT (µA) MAX14800–MAX14803 Low-Charge Injection, 16-Channel, High-Voltage Analog Switches 6 4 IPP 2 50 INN 0 0 0 10 20 30 40 50 TEMPERATURE (°C) 6 60 70 0 0 2 4 6 8 CLK SERIAL-CLOCK FREQUENCY (MHz) 10 0 10 20 30 40 SWITCHING FREQUENCY (kHz) _______________________________________________________________________________________ 50 Low-Charge Injection, 16-Channel, High-Voltage Analog Switches PIN NAME FUNCTION 1, 2, 14, 16, 24, 35, 36 N.C. 3 COM4 4 NO4 Analog Switch 4—Normally Open Terminal 5 NO3 Analog Switch 3—Normally Open Terminal 6 COM3 No Connection. Not internally connected. Analog Switch 4—Common Terminal Analog Switch 3—Common Terminal 7 NO2 8 COM2 Analog Switch 2—Normally Open Terminal Analog Switch 2—Common Terminal 9 COM1 Analog Switch 1—Common Terminal 10 NO1 Analog Switch 1—Normally Open Terminal 11 NO0 Analog Switch 0—Normally Open Terminal 12 COM0 13 VNN Negative High-Voltage Supply. Bypass VNN to GND with a 0.1µF or greater ceramic capacitor. 15 VPP Positive High-Voltage Supply. Bypass VPP to GND with a 0.1µF or greater ceramic capacitor. 17 GND Ground 18 VDD Digital Supply Voltage. Bypass VDD to GND with a 0.1µF or greater ceramic capacitor. 19 DIN Serial-Data Input 20 CLK Serial-Clock Input Analog Switch 0—Common Terminal 21 LE 22 CLR Latch Clear Input 23 DOUT Serial-Data Output 25 COM15 26 NO15 Analog Switch 15—Normally Open Terminal 27 NO14 Analog Switch 14—Normally Open Terminal 28 COM14 29 COM13 30 NO13 31 COM12 32 NO12 Analog Switch 12—Normally Open Terminal 33 NO11 Analog Switch 11—Normally Open Terminal 34 COM11 Analog Switch 11—Common Terminal 37 COM10 Analog Switch 10—Common Terminal Active-Low, Latch-Enable Input Analog Switch 15—Common Terminal Analog Switch 14—Common Terminal Analog Switch 13—Common Terminal Analog Switch 13—Normally Open Terminal Analog Switch 12—Common Terminal _______________________________________________________________________________________ 7 MAX14800–MAX14803 Pin Description Low-Charge Injection, 16-Channel, High-Voltage Analog Switches MAX14800–MAX14803 Pin Description (continued) PIN NAME 38 NO10 Analog Switch 10—Normally Open Terminal 39 COM9 Analog Switch 9—Common Terminal 40 NO9 41 COM8 42 NO8 43 NO7 44 COM7 45 NO6 46 COM6 47 NO5 48 COM5 DIN FUNCTION Analog Switch 9—Normally Open Terminal Analog Switch 8—Common Terminal Analog Switch 8—Normally Open Terminal Analog Switch 7—Normally Open Terminal Analog Switch 7—Common Terminal Analog Switch 6—Normally Open Terminal Analog Switch 6—Common Terminal Analog Switch 5—Normally Open Terminal Analog Switch 5—Common Terminal DN+1 DN 50% LE 50% DN-1 50% 50% tWL tCS 50% CLK tDS 50% tDH tDO 50% DOUT tOFF OFF 90% SWITCH 10% ON CLR tON 50% 50% tWC Figure 1. Serial Interface Timing 8 _______________________________________________________________________________________ Low-Charge Injection, 16-Channel, High-Voltage Analog Switches The MAX14800–MAX14803 provide high-voltage switching on 16 channels for ultrasound imaging and printer applications. The devices utilize HVCMOS process technology to provide 16 high-voltage lowcharge-injection SPST switches, controlled by a digital interface. Data is clocked into an internal 16-bit shift register and retained by a programmable latch with enable and clear inputs. A power-on-reset function ensures that all switches are open on power-up. The MAX14800–MAX14803 operate with a wide range of high-voltage supplies including: VPP/VNN = +100V/ -100V, +200V/0V, or +40V/-160V. The digital interface operates from a separate +2.7V to +5.5V VDD supply. Digital inputs DIN, CLK, LE, and CLR operate on the V DD supply voltage. The MAX14801/MAX14803 provide integrated 35kΩ bleed resistors on each switch terminal to discharge capacitive loads. The MAX14802/ MAX14803 provide integrated clamping diodes for overvoltage protection against positive overshoot. The MAX14802/MAX14803 feature clamping diodes (at the COM_). These clamping diodes provide overvoltage protection against positive overshoot. Analog Switch The MAX14800–MAX14803 allow a peak-to-peak analog signal range from VNN to the minimum of either VNN + 200V or VDD. Analog switch inputs must be unconnected, or satisfy VNN ≤ (VCOM_, VNO_) ≤ VPP during powerup and power-down. High-Voltage Supplies The MAX14800–MAX14803 allow a wide range of highvoltage supplies. The devices operate with VNN from -160V to 0 and VPP from +40V to VNN + 250V. When VNN is connected to GND (single-supply applications), the devices operate with VPP up to +200V. The VPP and VNN high-voltage supplies are not required to be symmetrical, but the voltage difference (VPP - VNN) must not exceed 250V. Bleed Resistors (MAX14801/MAX14803) The MAX14801/MAX14803 feature integrated 35kΩ bleed resistors to discharge capacitive loads such as piezoelectric transducers. Each analog switch terminal is connected to GND with a bleed resistor. Overvoltage Protection (MAX14802/MAX14803) The MAX14802/MAX14803 feature clamping diodes (at the COM_). These clamping diodes provide overvoltage protection against positive overshoot. Serial Interface The MAX14800–MAX14803 are controlled by a serial interface with a 16-bit serial shift register and transparent latch. Each of the sixteen data bits controls a single analog switch (see Table 1). Data on DIN is clocked with the most significant bit (MSB) first into the shift register on the rising edge of CLK. Data is clocked out of the shift register onto DOUT on the rising edge of CLK. DOUT reflects the status of DIN, delayed by 16 clock cycles (see Figures 1 and 2). Latch Enable (LE) Drive LE logic-low to change the contents of the latch and update the state of the high-voltage switches (Figure 2). Drive LE logic-high to freeze the contents of the latch and prevent changes to the switch states. To reduce noise due to clock feedthrough, drive LE logichigh while data is clocked into the shift register. After the data shift register is loaded with valid data, pulse LE logic-low to load the contents of the shift register into the latch. Latch Clear (CLR) The MAX14800–MAX14803 feature a latch clear input. Drive CLR logic-high to reset the contents of the latch to zero and open all switches. CLR does not affect the contents of the data shift register. Pulse LE logic-low to reload the contents of the shift register into the latch. Power-On Reset The MAX14800–MAX14803 feature a power-on-reset circuit to ensure all switches are open at power-on. The internal 16-bit serial shift register and latch are set to zero on power-up. _______________________________________________________________________________________ 9 MAX14800–MAX14803 Detailed Description MAX14800–MAX14803 Low-Charge Injection, 16-Channel, High-Voltage Analog Switches LE CLK D15 DIN D13 D14 D1 D0 LSB MSB D15 DOUT D13 D14 D1 D15 D0 DATA FROM PREVIOUS DATA BYTE POWER-UP DEFAULT: D15–D0 = 0 Figure 2. Latch Enable Interface Timing Table 1. Serial Interface Programming (Notes 5–10) CONTROL BITS DATA BITS D0 (LSB) D1 D2 D3 D4 D5 D6 D7 L L H CLR SW0 SW1 L OFF ON SW2 SW3 L L L L L OFF H L L ON L L L OFF H L L ON L L OFF ON L H SW4 SW5 SW6 L L L L L OFF H L L ON L L L OFF H L L ON L L OFF ON L H 10 LE FUNCTION SW7 L L L L L OFF H L L ON X X X X X X X X H L X X X X X X X X X H HOLD PREVIOUS STATE OFF OFF OFF OFF OFF OFF ______________________________________________________________________________________ OFF OFF Low-Charge Injection, 16-Channel, High-Voltage Analog Switches CONTROL BITS DATA BITS D8 D9 D10 D11 D12 D13 D14 D15 (MSB) LE FUNCTION CLR SW8 SW9 L L L OFF H L L ON L L OFF ON L H SW10 SW11 SW12 SW13 L L L L L OFF H L L ON L L L OFF H L L ON L L OFF ON L H L L L L L OFF H L L ON SW14 L L L OFF H L L ON L L L H L L X X X X X X X X H L X X X X X X X X X H SW15 OFF ON HOLD PREVIOUS STATE OFF OFF OFF OFF OFF OFF OFF OFF X = Don’t care. The 16 switches operate independently. Serial data is clocked in on the rising edge of CLK. The switches go to a state retaining their present condition on the rising edge of LE. When LE is low, the shift register data flows through the latch. Note 8: DOUT is high when switch 15 is on. Note 9: Shift register clocking has no effect on the switch states if LE is high. Note 10: The CLR input overrides all other inputs. Note 5: Note 6: Note 7: ______________________________________________________________________________________ 11 MAX14800–MAX14803 Table 1. Serial Interface Programming (Notes 5–10) (continued) MAX14800–MAX14803 Low-Charge Injection, 16-Channel, High-Voltage Analog Switches Applications Information For medical ultrasound applications, see Figures 4, 5, and 6. Logic Levels The MAX14800–MAX14803 digital interface inputs CLK, DIN, LE, and CLR operate on the VDD supply voltage. Daisy-Chaining Multiple Devices Digital output DOUT is provided to allow the connection of multiple MAX14800–MAX14803 devices by daisychaining (Figure 3). Connect each DOUT to the DIN of the subsequent device in the chain. Connect CLK, LE, and CLR inputs of all devices, and drive LE logic-low to update all devices simultaneously. Drive CLR high to open all the switches simultaneously. Additional shift registers can be included anywhere in series with the MAX14800–MAX14803 data chain. Supply Sequencing and Bypassing The MAX14800–MAX14803 do not require special sequencing of the VDD, VPP, and VNN supply voltages; however, analog switch inputs must be unconnected, or satisfy VNN ≤ (VCOM_, VNO_) ≤ VPP during power-up and power-down. Bypass VDD, VPP, and VNN to GND with a 0.1µF ceramic capacitor as close as possible to the device. Application Diagrams U11 U10 DIN1 DIN CLK CLK LE DOUT MAX14800– MAX14803 CLK LE DOUT DIN MAX14800– MAX14803 DOUT DIN CLK LE CLR U1n MAX14800– MAX14803 LE CLR CLR CLR U21 U20 DIN2 DOUT DIN CLK MAX14800– MAX14803 LE DOUT DIN CLK MAX14800– MAX14803 LE CLR U2n CLK MAX14800– MAX14803 LE CLR Figure 3. Interfacing Multiple Devices by Daisy-Chaining 12 DOUT DIN ______________________________________________________________________________________ CLR Low-Charge Injection, 16-Channel, High-Voltage Analog Switches HIGH-VOLTAGE TRANSMIT 1 PER CHANNEL MAX14800–MAX14803 PROBES MAINFRAME PROBE SELECTION 2 TO 4 PROBES CABLE 1 PER CHANNEL TRANSDUCERS 2 TO 4 PER CHANNEL ±1 TO 2A MAX ±100V MAX RELAY 1 RELAY/CH/PROBE PROBE A HV ANALOG SWITCHES 2 TO 4 PER CHANNEL PROBE B +V 10mA TYP LOW-VOLTAGE RECEIVE 64 TO 128 CHANNELS PROBE C ±1V MAX HIGHVOLTAGE ISOLATION -V PROBE D Figure 4. Medical Ultrasound Application—High-Voltage Analog Switches in Probe ______________________________________________________________________________________ 13 MAX14800–MAX14803 Low-Charge Injection, 16-Channel, High-Voltage Analog Switches PROBES MAINFRAME HV TRANSMIT 1 PER CHANNEL HV ANALOG SWITCHES 2 TO 4 PER CHANNEL PROBE SELECTION 2 TO 4 PROBES CABLE 2 TO 4 PER CHANNEL ±1 TO 2A MAX ±100V MAX +V 10mA TYP RELAYS 2 TO 4 RELAYS/CH/PROBE PROBE A LV RECEIVE 64 TO 128 CHANNELS ±1V MAX HIGHVOLTAGE ISOLATION PROBE B -V PROBE C PROBE D Figure 5. Medical Ultrasound Application—High-Voltage Analog Switches in Mainframe 14 ______________________________________________________________________________________ TRANSDUCERS 2 TO 4 PER CHANNEL Low-Charge Injection, 16-Channel, High-Voltage Analog Switches HIGH-VOLTAGE TRANSMIT 2 TO 4 PER CHANNEL PROBE SELECTION 2 TO 4 PROBES CABLE TRANSDUCERS 2 TO 4 PER CHANNEL 2 TO 4 PER CHANNEL ±1 TO 2A MAX ±100V MAX RELAYS 2 TO 4 RELAYS/CH/PROBE +V LOW-VOLTAGE RECEIVE 64 TO 128 CHANNELS MAX14800–MAX14803 PROBES MAINFRAME PROBE A 10mA TYP -V ±1V MAX PROBE B +V -V +V -V +V PROBE C -V +V -V +V -V PROBE D +V -V +V -V HIGH-VOLTAGE ISOLATION AND CHANNEL SELECT 2 TO 4 PER CHANNEL Figure 6. Medical Ultrasound Application—Multiple Transmit and Isolation per Receiver Channel ______________________________________________________________________________________ 15 MAX14800–MAX14803 Low-Charge Injection, 16-Channel, High-Voltage Analog Switches Functional Diagram VPP VDD CLR VPP ** LEVEL SHIFTER LATCH * DIN COM0 * VNN NO0 VNN MAX14802 MAX14803 16-BIT SHIFT REGISTER CLK VPP ** DOUT LATCH LEVEL SHIFTER COM15 * VNN NO15 * VNN LE GND VNN *BLEED RESISTORS AVAILABLE ON THE MAX14803 ONLY. **OVERVOLTAGE PROTECTION DIODES ARE AVAILABLE ON THE MAX14802 AND MAX14803 ONLY. 16 ______________________________________________________________________________________ Low-Charge Injection, 16-Channel, High-Voltage Analog Switches COM15 NO15 NO14 COM14 COM13 NO13 COM12 NO12 NO11 N.C. COM11 N.C. TOP VIEW 36 35 34 33 32 31 30 29 28 27 26 25 COM10 37 24 N.C. NO10 38 23 DOUT COM9 39 22 CLR NO9 40 21 LE COM8 41 20 CLK NO8 42 19 DIN MAX14800– MAX14803 NO7 43 18 VDD COM7 44 17 GND NO6 45 16 N.C. COM6 46 15 VPP NO5 47 14 N.C. COM5 48 13 VNN 9 10 11 12 NO0 8 COM0 7 NO1 NO4 6 COM1 N.C. COM4 5 COM2 4 NO2 3 NO3 2 COM3 1 N.C. + TQFP 7mm x 7mm Package Information Chip Information PROCESS: BiCMOS For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 48 TQFP C48-6 21-0054 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 17 © 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc. MAX14800–MAX14803 Pin Configuration