Datasheet

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General Description

The MAX4598 low-voltage, CMOS analog IC is a con-

figurable single-ended 8-to-1/differential 4-to-1 multi-

plexer. 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 T

+25°C and 2nA at T

= +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

Networking

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

MAX4598

Low-Voltage, Combination Single-Ended

8-to-1/Differential 4-to-1 Multiplexer

________________________________________________________________

Maxim Integrated Products

GND

NO8

NO6

NO7

NO5

LATCH

NLATCH

NO4

COMB

V-

NO1

NO3

NO2

COMA

V+

MAX4598

LOGIC DECODER

19-1385; Rev 0; 10/98

PART

MAX4598CAP

MAX4598CWP

MAX4598CCP 0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

20 SSOP

20 Wide SO

20 Plastic DIP

Contact factory for dice specifications.

Pin Configuration/Functional Diagram

Ordering Information

MAX4598C/D

MAX4598EAP -40°C to +85°C

0°C to +70°C Dice*

20 SSOP

MAX4598EWP

MAX4598EPP -40°C to +85°C

-40°C to +85°C 20 Wide SO

20 Plastic DIP

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

Summary of content (12 pages)

PAGE 1
9-1385; 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.
PAGE 2
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.
PAGE 3
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.
PAGE 4
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.
PAGE 5
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.
PAGE 6
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.
PAGE 7
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.
PAGE 8
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
PAGE 9
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.
PAGE 10
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.
PAGE 11
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.
PAGE 12
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.