Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsInterface ICsInterface IC - analogue switches SO 16

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 408-737-7600 ext. 3468.

General Description

The MAX4554/MAX4555/MAX4556 are CMOS analog ICs

configured as force-sense switches for Kelvin sensing in

automated test equipment (ATE). Each part contains

high-current, low-resistance switches for forcing current,

and higher resistance switches for sensing a voltage or

switching guard signals. The MAX4554 contains two

force switches, two sense switches, and two guard

switches configured as two triple-pole/single-throw

(3PST) normally open (NO) switches. The MAX4555 con-

tains four independent single-pole/single-throw (SPST)

normally closed (NC) switches, two force switches, and

two sense switches. The MAX4556 contains three inde-

pendent single-pole/double-throw (SPDT) switches, of

which one is a force switch and two are sense switches.

These devices operate from a single supply of +9V to

+40V or dual supplies of ±4.5V to ±20V. On-resistance

(6Ω max) is matched between switches to 1Ω max.

Each switch can handle Rail-to-Rail

analog signals.

The off-leakage current is only 0.25nA at +25°C and

2.5nA at +85°C. The MAX4554 is also fully specified for

+20V and -10V operation.

All digital inputs have +0.8V and +2.4V logic thresh-

olds, ensuring both TTL- and CMOS-logic compatibility.

Applications

Automated Test Equipment (ATE)

Calibrators

Precision Power Supplies

Automatic Calibration Circuits

Asymmetric Digital Subscriber Line (ADSL)

with Loopback

Features

♦ 6Ω Force Signal Paths (±15V Supplies)

1Ω Force Signal Matching (±15V Supplies)

♦ 60Ω Sense-Guard Signal Paths (±15V Supplies)

8Ω Sense-Guard Signal Matching (±15V Supplies)

♦ Rail-to-Rail Signal Handling

♦ Break-Before-Make Switching (MAX4556)

♦ t

and t

OFF

= 275ns (±15V Supplies)

♦ Low 1µA Power Consumption

♦ >2kV ESD Protection per Method 3015.7

♦ TTL/CMOS-Compatible Inputs

MAX4554/MAX4555/MAX4556

Force-Sense Switches

________________________________________________________________

Maxim Integrated Products

TOP VIEW

MAX4554

DIP/SO

COMG

COMS

COMF*

V+

IN1

IN2

V-

NOF1*

NOS1

NOG1

NOG2

NOS2

NOF2*

GND

MAX4554

NOTE: SWITCH POSITIONS SHOWN WITH IN_ = LOW

*INDICATES HIGH-CURRENT, LOW-RESISTANCE FORCE SWITCH

X = DON’T CARE

IN1 IN2 COMG COMS COMF*

OFF

NOG2

NOG1

OFF

NOS2

NOS1

OFF

NOF2*

NOF1*

NOG1

NOG2

NOS1

NOS2

NOF1*

NOF2*

19-1358; Rev 0; 4/98

PART

MAX4554CPE

MAX4554CSE 0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

16 Plastic DIP

16 Narrow SO

Ordering Information continued at end of data sheet.

Contact factory for availability.

Pin Configurations/Functional Diagrams/Truth Tables

Ordering Information

Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.

MAX4554C/D

MAX4554EPE -40°C to +85°C

0°C to +70°C Dice*

16 Plastic DIP

MAX4554ESE -40°C to +85°C 16 Narrow SO

MAX4555/MAX4556 shown at end of data sheet.

Summary of content (28 pages)

PAGE 1
9-1358; Rev 0; 4/98 Force-Sense Switches All digital inputs have +0.8V and +2.4V logic thresholds, ensuring both TTL- and CMOS-logic compatibility.
PAGE 2
ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND) V+ ...........................................................................-0.3V to +44V V- ............................................................................-25V to +0.3V V+ to V-...................................................................-0.3V to +44V All Other Pins (Note 1) ..........................(V- - 0.3V) to (V+ + 0.3V) Continuous Current into Force Terminals .......................
PAGE 3
Force-Sense Switches (V+ = +20V, V- = -10V, VL = 5V, GND = 0V, VIN_H = 2.4V, VIN_L = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 4
ELECTRICAL CHARACTERISTICS—MAX4554 (+20V, -10V Supplies) (continued) (V+ = +20V, V- = -10V, VL = 5V, GND = 0V, VIN_H = 2.4V, VIN_L = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS TA MIN TYP (Note 2) MAX UNITS POWER SUPPLY Power-Supply Range V+, VL, V- VL ≥ 4.5V C, E ±4.5 ±20 +25°C -1.0 1.0 C, E -5.0 5.
PAGE 5
Force-Sense Switches (V+ = +15V, V- = -15V, VL = 5V, GND = 0V, VIN_H = 2.4V, VIN_L = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER On-Resistance Match (Note 4) SYMBOL ∆RON CONDITIONS TA +25°C VCOM_ = ±10V, ICOM_ = 1mA RFLAT(ON) VCOM_ = +5V, 0V, -5V; ICOM_ = 1mA NOS_, NOG Off-Leakage Current INOS_(OFF), INOG_(OFF) V+ = 16.5V; V- = -16.5V; VCOM_ = ±10V; VNOS_, VNOG_ = COMS, COMG Off-Leakage Current ICOMS(OFF), ICOMG(OFF) V+ = 16.5V; V- = -16.
PAGE 6
ELECTRICAL CHARACTERISTICS—MAX4554 (±15V Supplies) (continued) (V+ = +15V, V- = -15V, VL = 5V, GND = 0V, VIN_H = 2.4V, VIN_L = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS TA MIN TYP (Note 2) MAX UNITS COMF On-Capacitance CON VCOMF = GND, f = 1MHz, Figure 14 +25°C 107 pF COMS, COMG On-Capacitance CON VCOMS, VCOMG_ = GND; f = 1MHz; Figure 14 +25°C 29 pF Total Harmonic Distortion (Force) THD +25°C 0.
PAGE 7
Force-Sense Switches (V+ = +15V, V- = -15V, VL = 5V, GND = 0V, VIN_H = 2.4V, VIN_L = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS TA MIN TYP (Note 2) MAX UNITS 30Ω ANALOG SWITCH (SENSE-GUARD) Analog Signal Range On-Resistance On-Resistance Match (Note 4) VCOM_, VNO_ (Note 3) C, E RON VCOM_ = ±10V, ICOM_ = 10mA ∆RON VCOM_ = ±10V, ICOM_ = 10mA V- +25°C 15 C, E +25°C 0.
PAGE 8
ELECTRICAL CHARACTERISTICS—MAX4555 (±15V Supplies) (continued) (V+ = +15V, V- = -15V, VL = 5V, GND = 0V, VIN_H = 2.4V, VIN_L = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS TA MIN TYP (Note 2) MAX UNITS NC_ Off-Capacitance (Force) COFF VCOM_, VNO_ = GND; f = 1MHz; Figure 14 +25°C 22 pF NC_ Off-Capacitance (Sense-Guard) COFF VCOM_, VNO_ = GND; f = 1MHz; Figure 14 +25°C 9 pF Total Harmonic Distortion (Force) THD +25°C 0.
PAGE 9
Force-Sense Switches (V+ = +15V, V- = -15V, VL = 5V, GND = 0V, VIN_H = 2.4V, VIN_L = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS TA MIN TYP (Note 2) MAX UNITS 60Ω ANALOG SWITCH (SENSE-GUARD) Analog Signal Range VCOM_, VNO_, VNC_ (Note 3) C, E On-Resistance Flatness (Note 5) RFLAT(ON) VCOM_ = +5V, 0V, -5V; ICOM_ = 10mA NO_, NC Off-Leakage Current INO_(OFF), INC_(OFF) V+ = 16.5V; V- = -16.
PAGE 10
MAX4554/MAX4555/MAX4556 Force-Sense Switches ELECTRICAL CHARACTERISTICS—MAX4556 (±15V Supplies) (continued) (V+ = +15V, V- = -15V, VL = 5V, GND = 0V, VIN_H = 2.4V, VIN_L = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL POWER SUPPLY Power-Supply Range V+, VL, V- CONDITIONS VL ≥ 4.5V V+ Supply Current I+ V+ = 16.5V, V- = -16.5V, VIN_ = 0 or VL V- Supply Current I- V+ = 16.5V, V- = -16.5V, VIN_ = 0 or VL VL Supply Current IL+ V+ = 16.
PAGE 11
Force-Sense Switches MAX4554 FORCE SWITCH ON-RESISTANCE vs. VCOM AND TEMPERATURE RDS(ON) (Ω) 25 5 20 MAX4555 SENSE 15 55 50 TA = +85°C 4 3 TA = +25°C 2 0 5 10 15 -10 VCOM (V) -5 0 5 10 15 -15 20 -5 5 10 15 ON-LEAKAGE CURRENT vs. TEMPERATURE 100 MAX4554/5/6-04 100 MAX4555 SENSE V+ = 15V, V- = -15V, VCOM = 10V 10 ON-LEAKAGE (nA) MAX4554/MAX4556 SENSE & GUARD 10 0 VCOM (V) SWITCH ON-RESISTANCE vs.
PAGE 12
____________________________________Typical Operating Characteristics (continued) (V+ = +15V, V- = -15V, GND = 0V, TA = +25°C, unless otherwise noted.) FORCE 450 tEN(ON) 400 60 180 MAX4554/5/6-09 500 MAX4554/5/6-08 100 80 MAX4555/4556 ON/OFF/TRANSITION TIMES vs. TEMPERATURE (+20V/-10V SUPPLIES) MAX4554 ON/OFF/ENABLE TIMES vs.
PAGE 13
Force-Sense Switches PIN NAME FUNCTION MAX4554 MAX4555 MAX4556 1 — — NOG1 — — 1, 2 NO3, NO2 2 — — NOS1 — 2, 15*, 10*, 7 14*, 15, 16 COM1, COM2 COM3, COM4 3* — — NOF1* — 3, 14, 11, 6 — NC1, NC2, NC3, NC4 — — 3* NO1* 4 4 4 V- Negative Analog Supply Voltage Input. Connect to GND for singlesupply operation. 5 5 5 GND Ground. Connect to digital ground. (Analog signals have no ground reference; they are limited to V+ and V-.
PAGE 14
MAX4554/MAX4555/MAX4556 Force-Sense Switches ______________Force-Sense Philosophy When a precise voltage must be applied to a load that draws appreciable current, the resistance of the conductors connecting the source and the load can degrade the load voltage. The resistance of the conductors forms a voltage divider with the load, so that the load voltage is lower than the source voltage.
PAGE 15
Force-Sense Switches When measuring a precise voltage from a high-resistance source, or when measuring a very small current or forcing it into a load, unwanted leakage currents can degrade the results. These leakage currents may exist in the insulation of wires connecting the source and the measuring device. Higher source voltages, higher source impedances, longer wires, lower currents, and higher temperatures further degrade the measurement.
PAGE 16
MAX4554/MAX4555/MAX4556 Force-Sense Switches BALANCED 5-WIRE GUARD CIRCUIT BASIC 3-WIRE GUARD CIRCUIT DRIVEN GUARD (COAX CABLE SHIELD) DRIVEN GUARD (COAX CABLE SHIELD) GUARD AMPLIFIER GUARD AMPLIFIER SENSE VOLTAGE OR CURRENT LEAKAGE CURRENT VOLTAGE OR CURRENT SOURCE LEAKAGE CURRENT LEAKAGE CURRENT VOLTAGE OR CURRENT SOURCE 3-WIRE GUARD CIRCUIT USING TRIAX TRIAX CABLE GUARD AMPLIFIER SIGNAL GUARD GROUND GUARD AMPLIFIER SENSE VOLTAGE OR CURRENT DRIVEN GUARD (COAX CABLE SHIELD) LEAKAGE CURRENT
PAGE 17
Force-Sense Switches MAX4554/MAX4555/MAX4556 8-WIRE PRECISION SOURCE-MONITOR FORCE-SENSE AMPLIFIER V+ CURRENT SENSE +FORCE +SENSE +DRIVEN GUARD V TWINAX CABLE VV+ GUARD AMPLIFIER VV+ LEAKAGE CURRENT VOLTAGE SOURCE LOAD LEAKAGE CURRENT V+ V- GUARD AMPLIFIER V+V V -DRIVEN GUARD -SENSE -FORCE TWINAX CABLE CURRENT SENSE VFORCE-SENSE AMPLIFIER Figure 3. 8-Wire Guarded Force-Sense Measurements Note that although the positive and negative circuits are identical, they are not redundant.
PAGE 18
MAX4554/MAX4555/MAX4556 Force-Sense Switches 12-WIRE PRECISION SOURCE-MONITOR + FORCE-SENSE AMPLIFIER V+ CURRENT SENSE V TRIAX CABLE +FORCE +GUARD GROUND VV+ LEAKAGE CURRENT VTRIAX CABLE +SENSE +GUARD GROUND + FORCE-GUARD AMPLIFIER V+ +SENSE GUARD AMPLIFIER V- LEAKAGE CURRENT V+ VOLTAGE SOURCE LOAD (OPTIONAL GROUND) VLEAKAGE CURRENT V+ - SENSE-GUARD AMPLIFIER V- FORCE-GUARD AMPLIFIER V+ GROUND - GUARD -SENSE TRIAX CABLE LEAKAGE CURRENT V+ V- GROUND - GUARD - FORCE +V V CURRENT SENSE V- - F
PAGE 19
Force-Sense Switches When a precision source or measurement must be connected sequentially to several circuits, all sense and guard connections must be switched simultaneously, and at least one of the force connections must be switched. To maintain safety and low noise levels, the ground (or chassis) connection should never be disconnected.
PAGE 20
MAX4554/MAX4555/MAX4556 Force-Sense Switches Increasing V- has no effect on the logic-level thresholds, but it does increase the drive to the internal Pchannel switches, reducing the overall switch on-resistance. V- also sets the negative limit of the analog signal voltage. Bipolar-Supply Operation The MAX4554/MAX4555/MAX4556 operate with bipolar supplies between ±4.5V and ±18V.
PAGE 21
Force-Sense Switches would be close to (but not exactly equal to) the desired value; this would not cause any damage to the device. Switching 3-Wire Guarded Circuits Figure 7 shows how to switch a single guarded voltage or current source between two loads using the MAX4554 or MAX4556. By interchanging loads and sources, the circuits can be reversed to switch two sources to a single load. If the loads have a common connection, the switch to that node can be eliminated.
PAGE 22
MAX4554/MAX4555/MAX4556 Force-Sense Switches V+ V- VL MAX4556 NC1 NO1 NC2 NO2 COM1 GUARD AMPLIFIER COM2 NC3 COM3 LOAD2 LOAD1 LOAD2 LOAD1 NO3 IN1 GND IN2 VOLTAGE OR CURRENT SOURCE IN 0 1 IN IN3 LOGIC LOAD 1 2 V+ V- MAX4554 GUARD AMPLIFIER VL NOG1 GCOM NOG2 FCOM NOF1 NOF2 SCOM NOS1 NOS2 IN1 GND EN VOLTAGE OR CURRENT SOURCE IN 0 1 LOGIC LOAD 1 2 IN IN2 CMOS INVERTER Figure 7.
PAGE 23
Force-Sense Switches Switching 8-Wire Guarded Circuits Figure 9 shows how to switch a single 8-wire guarded force-sense voltage or current source between two loads using two MAX4556s or two MAX4554s. By interchanging loads and sources, the circuits can be reversed so that they switch two sources to a single load. The two loads are shown isolated from each another, but if they have a common connection then the circuit must remain as shown in order to maintain accurate load voltage.
PAGE 24
MAX4554/MAX4555/MAX4556 Force-Sense Switches FORCE-SENSE AMPLIFIER V+ V+ V- VL CURRENT SENSE NC1 NC2 NC3 NO1 NO2 NO3 GND MAX4556 V- V+ V VL VCOM1 COM2 COM3 V+ MAX4556 NC1 NO1 COM1 IN1 NC2 COM2 NO2 NC3 COM3 NO3 GUARD AMPLIFIER V- IN2 V+ IN3 INA V+ LEAKAGE CURRENT V- LEAKAGE CURRENT VVL VOLTAGE SOURCE IN1 TWINAX CABLE +FORCE +SENSE +DRIVEN GUARD V+ LOAD 1 LOAD 2 IN2 GUARD AMPLIFIER GND IN IN3 MAX4556 NC1 NC2 NC3 NO1 NO2 NO3 GND COM1 COM2 COM3 VV+ V CURRENT SENSE VFORCE
PAGE 25
Force-Sense Switches V+ VL V+ VL VL NO_ OR NC_ V+ 50% VIN_ 0V VIN_ MAX4554 MAX4555 MAX4556 COM_ IN_ 50Ω GND EN V- V+ VOUT 300Ω 90% 35pF VOUT V- 90% 0V V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION. tOFF tON Figure 10. Address Transition Time VL V+ VL V+ VL VL NO_ ADDRESS SELECT V+ 50% VEN 0V IN_ MAX4554 COM_ VEN GND EN V- 50Ω V+ VOUT 300Ω 90% 35pF VOUT V- 90% 0V tTRANS tTRANS V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION. Figure 11.
PAGE 26
MAX4554/MAX4555/MAX4556 Force-Sense Switches _________________________________Test Circuits/Timing Diagrams (continued) VIN_ IN_ V+ VL V+ VL VL VIN NO_ OR NC_ 50Ω 0V MAX4554 MAX4555 MAX4556 COM_ GND EN VOUT V- ∆VOUT VOUT CL 1000pF ∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. V- Q = ∆VOUT x CL V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION. Figure 13.
PAGE 27
Force-Sense Switches TOP VIEW MAX4555 MAX4556 16 IN2 IN1 1 15 COM2* COM1 2 14 NC2* NC1 3 NO3 1 16 COM3 N02 2 15 COM2 NO1* 3 14 COM1* V- 4 13 V+ V- 4 13 V+ GND 5 12 VL GND 5 12 VL NC4 6 11 NC3* NC1* 6 11 IN1 10 COM3 NC2 7 10 IN2 9 IN3 NC3 8 9 IN3 COM4 7 IN4 8 DIP/SO DIP/SO MAX4555 IN_ SWITCH MAX4556 IN_ COM_ 0 1 ON OFF 0 1 NC_ NO_ SWITCH POSITIONS SHOWN WITH IN_ = LOW *INDICATES HIGH-CURRENT, LOW-RESISTANCE FORCE SWITCH Ordering Information (continued) PART TEMP.
PAGE 28
MAX4554/MAX4555/MAX4556 Force-Sense Switches _________________________________________________________________________Chip Topographies MAX4554 NOG1 MAX4555 IN1 COMG NOS1 COM1 COMS NOF1 IN2 COM2 NC1 NC2 COMF V+ V- 0.190" (4.83mm) GND V+ V- 0.190" (4.83mm) GND VL VL NC3 IN1 COM3 NC4 IN2 NOF2 COM4 NOS2 NOG2 IN4 EN 0.086" (2.18mm) IN3 0.086" (2.18mm) MAX4556 NO3 COM3 NO2 COM2 NO1 COM1 V+ V- 0.190" (4.83mm) GND VL IN1 IN2 NC1 NC2 NC3 IN3 0.086" (2.