19-1385; Rev 0; 10/98 Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer The MAX4598 low-voltage, CMOS analog IC is a configurable single-ended 8-to-1/differential 4-to-1 multiplexer. In addition to the input channels, both V+ and GND can be switched to the output channels, enabling the supply voltages to be monitored. The MAX4598 operates from a single +2.7V to +12V supply or from dual ±6V supplies. The device has low on-resistance (75Ω max) and TTL-compatible logic inputs from either ±5V or a single +5V supply. Each switch can handle Rail-to-Rail ® analog signals. The MAX4598 has two modes of operation: as a standard multiplexer and as a “latchable” multiplexer where the address lines are strobed. The off-leakage current is only 0.1nA at TA = +25°C and 2nA at TA = +85°C. ESD protection is > 2kV per Method 3015.7. The MAX4598 is available in small 20-pin SSOP, SO, and DIP packages. Applications ADC Systems Battery-Operated Equipment Test Equipment Avionics Audio-Signal Routing Features ♦ V+ and GND Can Be Switched to the Output Channels ♦ 75Ω (max) On-Resistance ♦ Single-Ended or Differential Operation ♦ 2pC (typ) Charge Injection ♦ Latched or Unlatched Operation ♦ TTL-Compatible Logic Inputs at ±5V Supply ♦ Handles Rail-to-Rail Analog Signals Ordering Information PART TEMP. RANGE PIN-PACKAGE 0°C to +70°C 20 SSOP MAX4598CAP MAX4598CWP 0°C to +70°C MAX4598CCP 0°C to +70°C MAX4598C/D 0°C to +70°C MAX4598EAP -40°C to +85°C MAX4598EWP -40°C to +85°C MAX4598EPP -40°C to +85°C *Contact factory for dice specifications. 20 Wide SO 20 Plastic DIP Dice* 20 SSOP 20 Wide SO 20 Plastic DIP Networking Pin Configuration/Functional Diagram COMB A1 AO NO4 NO2 NO3 NO1 VV+ COMA 1 20 2 19 3 LOGIC DECODER 18 4 17 5 16 6 15 7 14 8 13 9 MAX4598 10 12 11 GND A2 A3 NO8 NO6 NO7 NO5 EN LATCH NLATCH Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. MAX4598 General Description MAX4598 Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer ABSOLUTE MAXIMUM RATINGS V+ to GND ..............................................................-0.3V to +13V V- to GND ...............................................................-13V to +0.3V V+ to V-...................................................................-0.3V to +13V A_, EN, LATCH, NLATCH, NO_, COM_ (Note 1)...............................................(V- - 0.3V) to (V+ + 0.3V) Continuous Current (any terminal)....................................±20mA Peak Current, NO_, or COM_ (pulsed at 1ms, 10% duty cycle max) ............................±40mA Continuous Power Dissipation (TA = +70°C) SSOP (derate 8mW/°C above +70°C) .........................640mW Wide SO (derate 10mW/°C above +70°C)...................800mW Plastic DIP (derate 10.53mW/°C above +70°C) ..........889mW Operating Temperature Ranges MAX4598C_P ......................................................0°C to +70°C MAX4598E_P ...................................................-40°C to +85°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10sec) .............................+300°C Note 1: Signals on NO_, COM_, EN, LATCH, NLATCH, or A_ exceeding V+ or V- are clamped by internal diodes. Limit forward current to maximum current ratings 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—Dual Supplies (V+ = +5V ±10%, V- = -5V ±10%, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT V+ V SWITCH Analog Signal Range VCOM_, VNO_ (Note 3) V- ICOM_ = 1mA, VNO_ = ±3.0V, V+ = 4.5V, V- = -4.5V TA = +25°C ICOM_ = 1mA, VNO_ = ±3.0V, V+ = 4.5V, V- = -4.5V TA = +25°C ICOM_ = 1mA; VNO_ = -3V, 0, 3V; V+ = 4.5V, V- = -4.5V ± VNO_ = ±4.5V, VCOM_ = ±4.5V, V+ = 5.5V, V- = -5.5V TA = +25°C COM Off-Leakage Current (Note 6) VCOM_ = ±4.5V, ± ICOM(OFF) VNO_ = ±4.5V, V+ = 5.5V, V- = -5.5V TA = +25°C -0.2 TA = TMIN to TMAX -10 COM On-Leakage Current (Note 6) VCOM_ = ±4.5V, VNO_ = ±4.5V, V+ = 5.5V, V- = -5.5V TA = +25°C -0.2 ICOM(ON) TA = TMIN to TMAX -10 On-Resistance RON On-Resistance Matching Between Channels (Note 4) ∆RON On-Resistance Flatness (Note 5) RFLAT NO Off-Leakage Current (Note 6) INO(OFF) 45 TA = TMIN to TMAX Ω 100 1 TA = TMIN to TMAX 4 Ω 6 7 TA = TMIN to TMAX TA = +25°C 75 10 Ω 13 -0.1 0.01 0.1 nA TA = TMIN to TMAX -2 2 0.01 0.2 nA 10 0.01 0.2 nA 10 LOGIC INPUTS Input High Voltage VIH Input Low Voltage VIL Input Current with Input Voltage High IIH VEN = VA_ = VLATCH = VNLATCH = VCAL = V+ Input Current with Input Voltage Low IIL VEN = VA_ = VLATCH = VNLATCH = VCAL = 0 2 2.4 1.7 V 1.4 0.8 V -0.1 0.01 0.1 µA -0.1 0.01 0.1 µA _______________________________________________________________________________________ Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer (V+ = +5V ±10%, V- = -5V ±10%, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT ±6 V SUPPLY Power-Supply Range Positive Supply Current Negative Supply Current GND Supply Current ±2.7 I+ I- IGND VEN = VA_ = VLATCH = VNLATCH = 0 or V+, V+ = 5.5V, V- = -5.5V TA = +25°C -1 TA = TMIN to TMAX -5 VEN = VA_ = VLATCH = VNLATCH = 0 or V+, V+ = 5.5V, V- = -5.5V TA = +25°C -1 TA = TMIN to TMAX -5 VEN = VA_ = VLATCH = VNLATCH = 0 or V+, V+ = 5.5V, V- = -5.5V TA = +25°C -1 TA = TMIN to TMAX -5 0.001 1 µA 5 0.001 1 µA 5 0.001 1 µA 5 DYNAMIC TA = +25°C 65 100 Transition Time tTRANS Figure 1 Break-Before-Make Interval (Note 3) tOPEN Figure 2 Enable Turn-On Time tON Figure 3 Enable Turn-Off Time tOFF Figure 3 Charge Injection (Note 3) VCTE CL = 1nF, VNO_ = 0, Figure 4 TA = +25°C 2 Off-Isolation (Note 7) VISO VEN = 0, f = 1MHz, Figure 5 TA = +25°C -90 dB Crosstalk Between Channels (Note 8) VCT VEN = 2.4V, f = 1MHz, VGEN = 1Vp-p, TA = +25°C Figure 5 -80 dB Logic Input Capacitance CIN f = 1MHz TA = +25°C 3 pF f = 1MHz, VEN = VCOM_ = 0, Figure 6 TA = +25°C 3 pF COM Off-Capacitance f = 1MHz, CCOM(OFF) VEN = VCOM_ = 0, Figure 6 TA = +25°C 15 pF COM On-Capacitance CCOM(ON) f = 1MHz, VEN = 2.4V, TA = +25°C VCOM_ = 0 26 pF TA = +25°C 30 NO Off-Capacitance COFF TA = TMIN to TMAX TA = +25°C 150 4 TA = +25°C 10 55 TA = TMIN to TMAX ns 90 120 TA = +25°C 40 TA = TMIN to TMAX ns 70 100 5 ns ns pC LATCH TIMING (Note 3) Setup Time tS Figure 7 Hold Time tH Figure 7 TA = TMIN to TMAX 70 80 TA = +25°C -10 TA = TMIN to TMAX -10 0 ns ns _______________________________________________________________________________________ 3 MAX4598 ELECTRICAL CHARACTERISTICS—Dual Supplies (continued) MAX4598 Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer ELECTRICAL CHARACTERISTICS—Single +5V Supply (V+ = +5V ±10%, V- = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS CONDITIONS MIN TYP MAX UNIT V+ V SWITCH Analog Signal Range On-Resistance VNO_, VCOM_ RON (Note 3) 0 ICOM_ = 1mA, VNO_ = 3.0V, V+ = 4.5V TA = +25°C ICOM_ = 1mA, VNO_ = 3.0V, V+ = 4.5V TA = +25°C TA = TMIN to TMAX On-Resistance Matching Between Channels (Notes 3, 4) ∆RON On-Resistance Flatness RFLAT ICOM_ = 1mA; VNO_ = 3V, 2V, 1V; V+ = 4.5V NO Off-Leakage Current (Notes 6, 9) VNO_ = 4.5V, 1V; VCOM_ = 1V, 4.5V; V+ = 5.5V TA = +25°C INO(OFF) COM Off-Leakage Current (Notes 6, 9) VCOM_ = 4.5V, 1V; ICOM(OFF) VNO_ = 1V,4.5V; V+ = 5.5V COM On-Leakage Current (Notes 6, 9) ICOM(ON) LOGIC INPUTS (Note 3) Input High Voltage VIH Input Low Voltage VIL VCOM_ = 4.5V, VNO_ = 4.5V, V+ = 5.5V 2 Ω 8 Ω 12 TA = +25°C Ω 8 -0.1 0.1 -2 2 TA = +25°C -0.2 0.2 TA = TMIN to TMAX -10 10 TA = +25°C -0.2 0.2 TA = TMIN to TMAX -10 10 nA TA = TMIN to TMAX nA nA 2.4 VEN = VLATCH = VA_ = VNLATCH = V+ Input Current with Input Voltage Low VEN = VLATCH = VA_ = VNLATCH = 0 SUPPLY Power-Supply Range I+ 150 200 TA = TMIN to TMAX Input Current with Input Voltage High Positive Supply Current (Note 3) 80 1.6 V 1.3 0.8 V -0.1 0.01 0.1 µA -0.1 0.01 0.1 µA 2.7 12.0 V VEN = VA_ = VLATCH = VNLATCH = 0 or V+, V+ = 5.5V TA = +25°C -1 1 TA = TMIN to TMAX -5 5 µA DYNAMIC (Note 3) Transition Time tTRANS VNO_ = 3V, Figure 1 TA = +25°C Break-Before-Make Interval tOPEN Figure 2 TA = +25°C Enable Turn-On Time tON Figure 3 Enable Turn-Off Time tOFF Figure 3 4 115 TA = TMIN to TMAX TA = +25°C 210 4 10 85 TA = TMIN to TMAX TA = +25°C 160 ns 140 170 60 TA = TMIN to TMAX _______________________________________________________________________________________ ns 100 120 ns ns Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer (V+ = +5V ±10%, V- = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER Charge Injection SYMBOL VCTE CONDITIONS CONDITIONS CONDITIONS CL = 1nF, VNO_ = 0, Figure 4 MIN TYP MAX UNIT TA = +25°C 1 5 pC TA = +25°C 30 70 LATCH TIMING (Note 3) Setup Time tS Figure 7 Hold Time tH Figure 7 TA = TMIN to TMAX 80 TA = +25°C -10 TA = TMIN to TMAX -10 0 ns ns ELECTRICAL CHARACTERISTICS—Single +3V Supply (V+ = +2.7V to +3.6V, V- = 0, VIH = 2.4V, VIL = 0.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS CONDITIONS CONDITIONS MIN TYP MAX UNIT V+ V 220 500 SWITCH Analog Signal Range (Note 3) On-Resistance ICOM_ = 0.2mA, VNO_ = 1.5V, V+ = 2.7V RON LOGIC INPUTS (Note 3) Input High Voltage IIH Input Low Voltage IIL 0 TA = +25°C TA = TMIN to TMAX Ω 600 2.4 1.1 V 1.0 0.6 V DYNAMIC (Note 3) Transition Time tTRANS VNO1 = 1.5V, VNO8 = 0, Figure 1 TA = +25°C 200 310 ns Enable Turn-On Time tON VNO1 = 1.5V, Figure 3 TA = +25°C 160 250 ns Enable Turn-Off Time tOFF VNO1 = 1.5V, Figure 3 TA = +25°C 120 180 ns 45 80 ns LATCH TIMING (Note 3) Setup Time tS Figure 7 TA = +25°C Hold Time tH Figure 7 TA = +25°C -10 0 ns Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in this data sheet. Note 3: Guaranteed by design. Note 4: ∆RON = RON(MAX) - RON(MIN). Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 6: Leakage parameters are 100% tested at maximum-rated hot temperature and guaranteed by correlation at +25°C. Note 7: Off-Isolation = 20log10(VCOM / VNO), VCOM = output, VNO = input to off switch. Note 8: Between any two switches. Note 9: Leakage testing at single supply is guaranteed by testing with dual supplies. _______________________________________________________________________________________ 5 MAX4598 ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued) Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) ON-RESISTANCE vs. VCOM AND TEMPERATURE (SINGLE SUPPLY) 90 50 80 70 150 RON (Ω) 60 30 TA = +25°C 20 TA = +85°C TA = +70°C RON (Ω) 40 RON (Ω) 190 170 50 TA = +25°C 40 TA = -40°C V+ = +5V V- = -5V V+ = +5V V- = 0 10 0 50 0 -3 -2 -1 0 1 2 3 4 5 30 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VCOM (V) VCOM (V) ON-RESISTANCE vs. VCOM (DUAL SUPPLIES) LEAKAGE CURRENT vs. TEMPERATURE 100 V+ = +2.7V V- = -2.7V 80 70 V+ = +3V V- = -3V 60 50 V+ = +5V V- = -5V 40 SUPPLY CURRENT vs. TEMPERATURE 10n LEAKAGE CURRENT (A) 90 10p COM (OFF) 1p -3 -2 -1 0 1 2 3 4 I- 100p 10p 1p 10f 1f -40 -20 5 I+ 1n 0 20 40 60 80 100 120 -40 -20 TEMPERATURE (°C) VCOM (V) 70 40 140 MAX4598-07 V+ = +5V V- = -5V 20 60 120 tON, tOFF (ns) tON, tOFF (ns) 100 60 tON 50 tOFF 40 60 tOFF 20 0 20 -40 0 25 TEMPERATURE (°C) 6 tON 80 40 30 70 85 80 100 120 140 TEMPERATURE (°C) TURN-ON/TURN-OFF TIMES vs. SUPPLY VOLTAGE (DUAL SUPPLIES) TURN-ON/TURN-OFF TIMES vs. TEMPERATURE 80 0 MAX4598-08 -4 10n 100f NO (OFF) 10f -5 V+ = +5V V- = -5V 100n COM (ON) 100f 30 1000n 1n 100p 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VCOM (V) 100n MAX4598-04 110 0 SUPPLY CURRENT (A) -4 MAX4598-05 -5 V+ = +5V 70 20 10 V+ = +3V 110 90 30 TA = -40°C V+ = +2.7V 130 MAX4598-06 TA = +70°C MAX4598-02 TA = +85°C MAX4598-01 60 ON-RESISTANCE vs. VCOM (SINGLE SUPPLY) MAX4598-03 ON-RESISTANCE vs. VCOM AND TEMPERATURE (DUAL SUPPLIES) RON (Ω) MAX4598 Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer 2 3 4 5 V+, V- (V) _______________________________________________________________________________________ Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer 180 6 5 100 4 -30 60 OFF-ISOLATION -40 20 -50 -20 ON-PHASE -60 -60 2 1 -70 -100 0 -80 -140 -1 -180 -2 -90 0.1 1 10 100 1000 FREQUENCY (MHz) Pin Description PIN NAME FUNCTION 1 COMB 2 A1 Address Bit 1 3 A0 Address Bit 0 4 NO4 Channel Input 4 5 NO2 Channel Input 2 6 NO3 Channel Input 3 7 NO1 Channel Input 1 8 V- Negative Supply Voltage Positive Supply Voltage Multiplexer Output B 9 V+ 10 COMA 11 NLATCH 12 LATCH 13 EN 14 NO5 Channel Input 5 15 NO7 Channel Input 7 16 NO6 Channel Input 6 17 NO8 Channel Input 8 18 A3 Address Bit 3 19 A2 Address Bit 2 20 GND Multiplexer Output A Data-Strobe Mode Select Latch Input Multiplexer Enable Ground V+ = +5V V- = -5V 3 Q (pC) INSERTION LOSS PHASE (°C) 140 -20 -10 LOSS (dB) CHARGE INJECTION vs. VCOM MAX4598-09 MAX4598-10 FREQUENCY RESPONSE 0 V+ = +5V V- = 0 -5 -4 -3 -2 -1 0 1 2 3 4 5 VCOM (V) _______________Detailed Description The MAX4598 can be configured as a single 8-channel or dual 4-channel multiplexer. In the single 8-to-1 multiplexer configuration, COMA connects to one of the eight inputs (NO1 to NO8), GND, or V+ by the address inputs A0 to A2 (see Truth Table). In the dual 4-to-1 multiplexer configuration, COMA connects to one of the four inputs (NO1, NO3, NO5, NO7), GND, or V+, and COMB connects to one of the four inputs (NO2, NO4, NO6, NO8) or GND by the address inputs A0 to A2 (see Truth Table). The MAX4598 functions as a standard multiplexer when NLATCH is high. When NLATCH is low, the condition set by A0 to A3 is activated at the rising edge of LATCH. Otherwise, the outputs remain at the previously set condition. __________Applications Information The MAX4598 construction is typical of most CMOS analog switches. It has three supply pins: V+, V-, and GND. The positive and negative power supplies are used to drive the internal CMOS switches and set the limits of the analog voltage on any switch. Reverse ESD-protection diodes are internally connected between each analog signal pin and V+ and V-. If the voltage on any pin exceeds V+ or V- by 0.3V, one of the ESD diodes starts to conduct. During normal operation these reverse-biased ESD diodes leak, forming the only current drawn from V-. _______________________________________________________________________________________ 7 MAX4598 Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer MAX4598 Truth Table A3 A2 A1 A0 EN LATCH NLATCH COMA COMB x x x x 0 x x High-Z High-Z x x x x 1 0 State is latched on the rising edge of LATCH State is latched on the rising edge of LATCH 0 0 0 0 1 x 1 NO1 GND 0 0 0 1 1 x 1 NO2 GND 0 0 1 0 1 x 1 NO3 GND 0 0 1 1 1 x 1 NO4 GND 0 1 0 0 1 x 1 NO5 GND 0 1 0 1 1 x 1 NO6 GND 0 1 1 0 1 x 1 NO7 GND 0 1 1 1 1 x 1 NO8 GND 1 0 0 0 1 x 1 NO1 NO2 1 0 0 1 1 x 1 NO3 NO4 1 0 1 0 1 x 1 NO5 NO6 1 0 1 1 1 x 1 NO7 NO8 1 1 0 0 1 x 1 GND GND 1 1 0 1 1 x 1 V+ GND 1 1 1 0 1 x 1 NO8 NO8 1 1 1 1 1 x 1 High-Z High-Z x = Don’t care Virtually all the analog leakage current is through the ESD diodes. Although the ESD diodes on a given signal pin are identical, and therefore fairly well balanced, they are reverse-biased differently. Each is biased by either V+ or V- and the analog signal. This means their leakage varies as the signal varies. The difference in the two diodes’ leakage from the signal path to the V+ and V- pins constitutes the analog signal-path leakage current. All analog leakage current flows to the supply terminals, not to the other switch terminal. This explains how both sides of a given switch can show leakage currents of either the same or opposite polarity. There is no connection between the analog signal paths and GND. The analog signal paths consist of an N-channel and a P-channel MOSFET, with their sources and drains paralleled and their gates driven out of phase with V+ and V- by the logic-level translators. V+ and GND power the internal logic and logic-level translators, and set the input logic thresholds. The logic-level translators convert the logic levels to switched V+ and V- signals to drive the analog switch gates. This drive signal is the only connection between 8 the logic supplies and the analog supplies. All pins have ESD protection to V+ and to V-. Increasing V- has no effect on the logic-level thresholds, but it does increase the drive to the P-channel switches, reducing their on-resistance. V- also sets the negative limit of the analog signal voltage. The logic-level thresholds are CMOS- and TTL-compatible when V+ is +5V. As V+ is raised, the threshold increases slightly; when V+ reaches +12V, the level threshold is about 3.2V, which is above the TTL output high-level minimum of 2.4V but still compatible with CMOS outputs. Bipolar-Supply Operation The MAX4598 operates with bipolar supplies between ±2.7V and ±6V. The V+ and V- supplies need not be symmetrical, but their sum cannot exceed the absolute maximum rating of 13V. Do not connect the MAX4598 V+ pin to +3V and connect the logic-level input pins to TTL logic-level signals. TTL logic-level outputs can exceed the absolute maximum ratings, causing damage to the part and/or external circuits. _______________________________________________________________________________________ Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer The MAX4598 operates from a single supply between +2.7V and +12V when V- is connected to GND. All of the bipolar precautions must be observed. However, these parts are optimized for ±5V operation, and most AC and DC characteristics are degraded significantly when departing from ±5V. As the overall supply voltage (V+ to V-) is lowered, switching speed, on-resistance, When power to the MAX4598 is off (i.e., V+ = V- = 0), the Absolute Maximum Ratings still apply: neither logiclevel inputs on NO_ nor signals on COM_ can exceed ±0.3V. Voltages beyond ±0.3V cause the internal ESDprotection diodes to conduct, and the parts can be damaged if excessive current flows. Power Off Test Circuits/Timing Diagrams +5V NLATCH EN LATCH A3 V+ A0 A1 A2 LOGIC INPUT VEN V+ NO1 +3V V+ 0V NO2–NO7 VNO1 NO8 MAX4598 -3V COMA V- GND VOUT SWITCH OUTPUT VOUT 90% 0V 90% 35pF 300Ω 50Ω 50% 50% tR < 20ns tF < 20ns VNO8 -5V tTRANS tTRANS Figure 1. Transition Time +5V EN NLATCH V+ LOGIC INPUT VA LATCH NO1–NO8 A3 A0 VA MAX4598 50Ω 50% 50% tR < 20ns tF < 20ns 0V VOUT 90% A1 A2 +3V V+ COMA V- GND VOUT 300Ω 35pF SWITCH OUTPUT VCOM 0V tOPEN -5V Figure 2. Break-Before-Make Interval _______________________________________________________________________________________ 9 MAX4598 Single-Supply Operation off-isolation, and distortion are degraded (see Typical Operating Characteristics). Single-supply operation also limits signal levels and interferes with grounded signals. When V- = 0, AC signals are limited to -0.3V. Voltages below -0.3V can be clipped by the internal ESD-protection diodes, and the parts can be damaged if excessive current flows. Caution: The absolute maximum V+ to V- differential voltage is 13V. Typical “±6 Volt” or “12 Volt” supplies with ±10% tolerances can be as high as 13.2V from V+ to V-. This voltage can damage the MAX4598. Even ±5% tolerance supplies may have overshoot or noise spikes that exceed 13V. Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer MAX4598 Test Circuits/Timing Diagrams (continued) tR < 20ns tF < 20ns +5V V+ VEN VEN EN NO1 LATCH A3 +3V NO2–NO8 A1 A2 GND 50Ω 50% 0V VOUT MAX4598 A0 50% V+ NLATCH COMA V- 90% 90% VOUT 35pF 1k -5V 0V tON tOFF Figure 3. Enable Switching Time +5V RS NO VEN VS V+ LOGIC INPUT VEN EN A0 CHANNEL SELECT NLATCH MAX4598 COMA V+ ON OFF VCOM A1 ∆VOUT A2 A3 GND CL 1nF V- VCOM ∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. -5V Q = (∆VOUT) (CL) Figure 4. Charge Injection +5V 10nF V+ VIN V- EN VOUT MAX4598 V OFF-ISOLATION = 20log OUT VIN V CROSSTALK = 20log OUT VIN MEAS. REF COM_ A_ LATCH NETWORK ANALYZER 50Ω 50Ω NO_ NLATCH V+ V- GND 50Ω 50Ω 10nF -5V NOTES: MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM AND “OFF” TERMINAL ON EACH SWITCH. ON LOSS IS MEASURED BETWEEN COM AND “ON” TERMINAL ON EACH SWITCH. Figure 5. Off-Isolation/Crosstalk 10 ON 0V ______________________________________________________________________________________ Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer ____________________Chip Topography A0 A1 COMB GND A2 A3 +5V NLATCH V+ A3 NO1 A2 CHANNEL SELECT NO8 1MHz CAPACITANCE ANALYZER NO8 MAX4598 A1 COM_ A0 GND LATCH, EN NO4 0.104" (2.64mm) NO2 V- NO3 -5V NO1 NO6 NO7 NO5 Figure 6. NO_/COM_ Capacitance +5V V- V+ COMA LATCH EN NLATCH EN V+ 0.092" (2.34mm) LATCH +3V NO2 NO1, NO3–NO8 A0 A1 A2 MAX4598 A3 NLATCH GND TRANSISTOR COUNT: 287 SUBSTRATE CONNECTED TO V+ COM V- -5V LATCH 50% tS tH ADDRESS VIH VIL NOTE: TIMING MEASUREMENT REFERENCE LEVEL IS VIH - VIL 2 Figure 7. Setup Time, Hold Time ______________________________________________________________________________________ 11 MAX4598 Test Circuits/Timing Diagrams (continued) MAX4598 Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer NOTES 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.