MAX127ACAI(2012) Просмотр технического описания (PDF) - Maxim Integrated

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MAX127ACAI
(Rev.:2012)

Multirange, +5V, 12-Bit DAS with 2-Wire Serial Interface

Maxim Integrated 

MAX127/MAX128

Multirange, +5V, 12-Bit DAS with

2-Wire Serial Interface

Electrical Characteristics (continued)

(VDD = +5V ±5%; unipolar/bipolar range; external reference mode, VREF = 4.096V; 4.7μF at REF; external clock, fCLK = 400kHz;

TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

REFERENCE INPUT (buffer disabled, reference input applied to REF)

Input Voltage Range

Input Current

VREF = 4.18V

Normal, or STANDBY

power-down mode

FULL power-down mode

Input Resistance

Normal or STANDBY power-down mode

FULL power-down mode

REFADJ Threshold for

Buffer Disable

POWER REQUIREMENTS

Supply Voltage

VDD

Normal mode, bipolar ranges

Supply Current

Normal mode, unipolar ranges

IDD

STANDBY power-down mode (Note 6)

FULL power-down mode

Power-Supply Rejection Ratio

(Note 7)

PSRR

External reference = 4.096V

Internal reference

TIMING

External Clock Frequency Range

Conversion Time

Throughput Rate

fCLK

tCONV

Bandgap Reference

Startup Time

Power-up (Note 8)

Reference Buffer Settling Time

DIGITAL INPUTS (SHDN, A2, A1, A0)

To 0.1mV, REF bypass

capacitor fully discharged

CREF = 4.7μF

CREF = 33μF

Input High Threshold Voltage

Input Low Threshold Voltage

Input Leakage Current

Input Capacitance

Input Hysteresis

VIH

VIL

IIN

CIN

VHYS

VIN = 0V or VDD

(Note 4)

MIN TYP

2.4

10

5

VDD - 0.5

4.75

6

700

120

±0.1

±0.5

6.0

7.7

200

8

60

0.8

±0.1

0.2

MAX UNITS

4.18

V

400

μA

1

kΩ

MΩ

V

5.25

V

18

mA

10

850

µA

220

±0.5

LSB

0.4 MHz

10.0

µs

8

ksps

μs

ms

2.4

V

V

±10

µA

15

pF

V

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