MAX1241BCSLASHD datasheet(4/15 Pages) MAXIM

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VDD = 3.6V

+2.7V, Low-Power,

12-Bit Serial ADCs in 8-Pin SO

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDD = +2.7V to +3.6V (MAX1240); VDD = +2.7V to +5.25V (MAX1241); 73ksps, fSCLK = 2.1MHz (50% duty cycle); MAX1240—4.7µF

capacitor at REF pin, MAX1241—external reference; VREF = 2.500V applied to REF pin; TA = TMIN to TMAX; unless otherwise noted.)

Note 1: Tested at VDD = +2.7V.

Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the full-scale range and

offset have been calibrated.

Note 3: MAX1240—internal reference, offset nulled; MAX1241—external reference (VREF = +2.500V), offset nulled.

Note 4: External load should not change during conversion for specified accuracy.

Note 5: Guaranteed by design. Not subject to production testing.

Note 6: Measured as [VFS(2.7V) - VFS(VDD(MAX)].

Note 7: To guarantee acquisition time, tACQ is the maximum time the device takes to acquire the signal, and is also the minimum

time needed for the signal to be acquired.

SCLK Pulse Width Low

tCL

200

SCLK Pulse Width High

tCH

200

SCLK Clock Frequency

fSCLK

2.1

MHz

CS Rise to Output Disable

tTR

240

SCLK Low to CS Fall Setup Time

tCS0

DOUT Rise to SCLK Rise (Note 5)

tSTR

CS Pulse Width

tCS

240

Figure 2, CLOAD = 50pF

CS Fall to Output Enable

tDV

240

Figure 1, CLOAD = 50pF

PARAMETERS

SYMBOL

MIN

TYP

MAX

UNITS

CONDITIONS

Acquisition Time

tACQ

1.5

µs

CS = VDD (Note 6)

TIMING CHARACTERISTICS (Figure 8)

(VDD = +2.7V to +3.6V (MAX1240); VDD = +2.7V to +5.25V (MAX1241); TA = TMIN to TMAX, unless otherwise noted.)

PARAMETERS

SYMBOL

MIN

TYP

MAX

UNITS

CONDITIONS

2.7

3.6

MAX1240

2.7

5.25

MAX1241

VDD

Supply Voltage

±0.3

(Note 5)

PSR

Supply Rejection

240

SCLK Fall to Output Data Valid

tDO

200

Figure 1,

CLOAD = 50pF

MAX124_ _C/E

MAX124_ _M

1.4

2.0

Operating

mode

1.6

2.5

VDD = 3.6V

3.5

VDD = 5.25V

VDD = 3.6V

VDD = 5.25V

IDD

1.9

Power-down, digital inputs

at 0V or VDD

1.4

3.5

µA

0.9

1.5

VDD = 3.6V

MAX1240C

MAX1241A/B

Supply Current

MAX1240A/B

1.6

3.8

VDD = 3.6V

VDD = 5.25V

0.9

2.8

MAX1241C

POWER REQUIREMENTS

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