MAX1270BCNG datasheet(5/20 Pages) MAXIM

Part #	MAX1270BCNG

Description	Multirange, 5V, 8-Channel, Serial 12-Bit ADCs

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Manufacturer	MAXIM [Maxim Integrated Products]

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Multirange, +5V, 8-Channel,

Serial 12-Bit ADCs

_______________________________________________________________________________________

5

ELECTRICAL CHARACTERISTICS (continued)

(VDD = +5.0V ±5%; unipolar/bipolar range; external reference mode, VREF = +4.096V; 4.7µF at REF; external clock; fCLK = 2.0MHz,

50% duty cycle (MAX127_B); fCLK = 1.8MHz, 50% duty cycle (MAX127_A); 18 clock/conversion cycle, TA = TMIN to TMAX, unless

otherwise noted. Typical values are TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAX127_A

6.6

External clock mode

(Note 8)

MAX127_B

6.0

Conversion Time

tCONV

Internal clock mode, Figure 9

6

7.7

11

µs

MAX127_A

100

External clock mode

MAX127_B

110

Throughput Rate

Internal clock mode

43

ksps

Bandgap Reference Startup Time

Power-up (Note 9)

200

µs

CREF = 4.7µF

8

Reference Buffer Settling Time

To 0.1mV, REF bypass

capacitor fully

discharged

CREF = 33µF

60

ms

DIGITAL INPUTS (DIN, SCLK, CS, and SHDN)

Input High Threshold Voltage

VIH

2.4

V

Input Low Threshold Voltage

VIL

0.8

V

Input Hysteresis

VHYS

0.2

V

Input Leakage Current

IIN

VIN = 0 to VDD

-10

+10

µA

Input Capacitance

CIN

(Note 4)

15

pF

DIGITAL OUTPUTS (DOUT, SSTRB)

ISINK = 5mA

0.4

Output Voltage Low

VOL

ISINK = 16mA

0.4

V

Output Voltage High

VOH

ISOURCE = 0.5mA

VDD -

0.5

V

Tri-State Leakage Current

IL

CS = VDD

-10

+10

µA

Tri-State Output Capacitance

COUT

CS = VDD (Note 4)

15

pF

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