MAX1245ACAP 데이터 시트보기 (PDF) - Maxim Integrated

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MAX1245ACAP

+2.375V, Low-Power, 8-Channel, Serial 12-Bit ADC

Maxim Integrated 

+2.375V, Low-Power, 8-Channel,

Serial 12-Bit ADC

TIMING CHARACTERISTICS

(VDD = +2.375V to +3.3V, COM = 0V, TA = TMIN to TMAX, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

Acquisition Time

tACQ

DIN to SCLK Setup

tDS

DIN to SCLK Hold

SCLK Fall to Output Data Valid

CS Fall to Output Enable

CS Rise to Output Disable

CS to SCLK Rise Setup

CS to SCLK Rise Hold

tDH

tDO

tDV

tTR

tCSS

tCSH

Figure 1

Figure 1

Figure 2

SCLK Pulse Width High

tCH

SCLK Pulse Width Low

tCL

SCLK Fall to SSTRB

CS Fall to SSTRB Output Enable

CS Rise to SSTRB Output Disable

tSSTRB

tSDV

tSTR

Figure 1

External clock mode only, Figure 1

External clock mode only, Figure 2

SSTRB Rise to SCLK Rise

tSCK Internal clock mode only (Note 7)

MIN TYP MAX UNITS

2.0

µs

200

ns

0

ns

20

260

ns

240

ns

400

ns

200

ns

0

ns

300

ns

300

ns

260

ns

240

ns

400

ns

0

ns

Note 1:

Note 2:

Note 3:

Note 4:

Note 5:

Note 6:

Note 7:

Note 8:

Note 9:

Tested at VDD = +2.375V; COM = 0V; unipolar single-ended input mode.

Relative accuracy is the deviation of the analog value at any code from its theoretical value after the full-scale range has

been calibrated.

External reference (VREF = +2.048V), offset nulled.

Ground “on” channel; sine wave applied to all “off” channels.

Conversion time defined as the number of clock cycles multiplied by the clock period; clock has 50% duty cycle.

The common-mode range for the analog inputs is from AGND to VDD.

Guaranteed by design. Not subject to production testing.

ADC performance is limited by the converter’s noise floor, typically 300µVp-p.

| | Measured as VFS(2.375V) - VFS(3.3V) .

__________________________________________Typical Operating Characteristics

(VDD = 2.5V, VREF = 2.048V, fCLK = 1.5MHz, CLOAD = 20pF, TA = +25°C, unless otherwise noted.)

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

1.25

RL = ∞

CODE = 101010100000

1.00

CLOAD = 50pF

SUPPLY CURRENT

vs. TEMPERATURE

0.90

RL = ∞

CODE = 101010100000

0.85

0.80

0.75

CLOAD = 20pF

0.50

2.375

2.625

2.875

VDD (V)

3.125

3.375

0.75

0.70

0.65

-55 -30 -5 20 45 70 95 120 145

TEMPERATURE (°C)

0.50

0.45

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0.00

2.375

INTEGRAL NONLINEARITY

vs. SUPPLY VOLTAGE

2.625 2.875

VDD (V)

3.125

3.375

4 _______________________________________________________________________________________

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