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MAX14752/MAX14753

8-Channel/Dual 4-Channel

72V Analog Multiplexers

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Detailed Description

The MAX14752/MAX14753 are 8-to-1 and dual 4-to-1

high-voltage analog multiplexers. Both devices feature

60Ω (typ) on-resistance with 0.03Ω (typ) on-resistance

flatness. These low on-resistance multiplexers conduct

equally well in either direction.

The MAX14752 is an 8-to-1 multiplexer and MAX14753

is a dual 4-to-1 multiplexer. Both devices operate with

dual supplies of ±10V to ±36V or a single supply of

+20V to +72V. Both devices can also operate with

unbalanced supplies, such as +36V and -10V. These

multiplexers support rail-to-rail input and output signals.

The control logic level is defined via the EN input.

These devices do not require power-supply sequenc-

ing. For input voltage steps larger than 15V, the input-

signal slew rate needs to be limited as described in the

Applications Information

section, otherwise the device

can be damaged.

Applications Information

Current Through the Mux

The current flowing through each on-channel of the

MAX14752/MAX14753 multiplexers must be limited to

±5mA for normal operation. If the current exceeds this

limit, an internal leakage current from that channel to

appears. Larger input current does not destroy the

device if the max power dissipation is not exceeded.

Signal’s Slew-Rate Limit

If the input signal to the MAX14752/MAX14753 is a volt-

age step larger than 15V, limit the slew rate of the sig-

nal according to the safe operating area specified in

Figure 11. For input-voltage steps lower than 15V (posi-

tive or negative), slew-rate limiting is not required. Slew-

rate limiting can be achieved through a passive RC

lowpass filter (see Figure 12). Do not use the input volt-

age steps beyond the safe operating area specified in

the Figure 11 to avoid permanent damage to the device.

INPUT SLEW-RATE SOA

INPUT VOLTAGE STEP (V)

INPUT SLEW RATE (V/μs)

40 50 6055 65

100

140

180

220

260

300

120

160

200

240

280

070455152520 30 3510

SAFE

OPERATING

AREA (SOA)

Figure 11. Safe Operating Area

MAX14752

OUT

1nF

500Ω

IN0

IN1

IN2

IN3

IN5

IN6

IN7

IN4

1μF

CONTROL

S0 S2 GNDS1 EN

1μF

Figure 12. Input Slew-Rate Limit

1 2 ... 8 9 10 11 12 13 14 15 16

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