MX7575JCWN datasheet(4/12 Pages) MAXIM

4 / 12 page

CMOS, µP-Compatible, 5µs/10µs, 8-Bit ADCs

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______________________________________________________________Pin Description

DIP/SO

NAME

FUNCTION

Chip Select Input.

CS must be low for the device to be selected or to recognize the RD input.

Read Input.

RD must be low to access data. RD is also used to start conversions. See the

Microprocessor Interface section.

(MX7575)

Test Point. Connect to VDD.

7, 8

D6, D5

Three-State Data Outputs, bits 6 and 5

Three-State Data Output, bit 7 (MSB)

CLK

External Clock Input/Internal Oscillator Pin for frequency setting RC components.

BUSY

BUSY Output. BUSY going low indicates the start of a conversion. BUSY going high indicates the

end of a conversion.

DGND

Digital Ground

TA = +25°C

TA = TMIN to TMAX

ALL

J/K/A/B

S/T

PARAMETER

SYMBOL

CONDITIONS

MIN

MAX

MIN

MAX

MIN

MAX

UNITS

CS to RD Setup Time

RD to BUSY Propagation Time

100

120

Data-Access Time after

(Note 6)

100

120

RD Pulse Width

100

120

CS to RD Hold Time

Data-Access Time after

BUSY

(Note 6)

100

Data-Hold Time

(Note 7)

100

BUSY to CS Delay

TIMING CHARACTERISTICS (Note 5)

(VDD = +5V, VREF = 1.23V, AGND = DGND = 0V.)

Note 5: Timing specifications are sample tested at +25°C to ensure compliance. All input control signals are specified with

tr = tf = 20ns (10% to 90% of +5V) and timed from a voltage level of 1.6V.

Note 6: t3 and t6 are measured with the load circuits of Figure 1 and defined as the time required for an output to cross 0.8V or 2.4V.

Note 7: t7 is defined as the time required for the data lines to change 0.5V when loaded with the circuits of Figure 2.

PLCC

8, 9

MODE

(MX7576)

Mode Input. MODE = low puts the ADC into its asynchronous conversion mode. MODE has to be

tied high for the synchronous conversion mode and the ROM interface mode.

Three-State Data Output, bit 0 (LSB)

10–13

D4–D1

Three-State Data Outputs, bits 4–1

AGND

Analog Ground

12–15

VDD

Power-Supply Voltage. +5V nominal.

REF

Reference Input. +1.23V nominal.

—

N.C.

No Connect

1, 11

AIN

Analog Input. 0V to 2VREF input range.

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