Rainbow-electronics ADC12041 Bedienungsanleitung PDF herunterladen (Seite 6)

Digital Timing Characteristics The following specifications apply to the ADC12041, 13-bit data bus width,

5V, f

CLK

12 MHz, t

3 ns and C

50 pF on data I/O lines

Symbol

Parameter Conditions

Typical Limits Unit

(Figure 7)

(Note 10) (Note 11) (Limit)

TPR

Throughput Rate Sync-Out Mode (SYNC Bit

‘‘0’’) 222 kHz

9 Clock Cycles of Acquisition

Time

CSWR

Falling Edge of CS

0ns

to Falling Edge of WR

WRCS

Active Edge of WR

0ns

to Rising Edge of CS

WR Pulse Width 20 30 ns (min)

WRSETFalling

Write Setup Time WMODE

‘‘1’’ 20 ns (min)

WRHOLDFalling

Write Hold Time WMODE

‘‘1’’ 5 ns (min)

WRSETRising

Write Setup Time WMODE

‘‘0’’ 20 ns (min)

WRHOLDRising

Write Hold Time WMODE

‘‘0’’ 5 ns (min)

CSRD

Falling Edge of CS

0ns

to Falling Edge of RD

RDCS

Rising Edge of RD

0ns

to Rising Edge of CS

RDDATA

Falling Edge of RD to Valid Data 8-Bit Mode (BW Bit

‘‘0’’) 40 58 ns (max)

RDDATA

Falling Edge of RD to Valid Data 13-Bit Mode (BW Bit

‘‘1’’) 26 44 ns (max)

RDHOLD

Read Hold Time 23 32 ns (max)

RDRDY

Rising Edge of RD

24 38 ns (max)

to Rising Edge of RDY

WRRDY

Active Edge of WR WMODE

‘‘1’’

37 60 ns (max)

to Rising Edge of RDY

STDRDY

Active Edge of WR WMODE

‘‘0’’. Writing the

1.4 2.5 ms (max)

to Falling Edge of RDY

RESET Command into the

Configuration Register

SYNC

Minimum SYNC Pulse Width 5 10 ns (min)

Notes on Specifications

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is

functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed

specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test

conditions.

Note 2: All voltages are measured with respect to GND, unless otherwise specified.

Note 3: When the input voltage (V

) at any pin exceeds the power supply rails (V

GND or V

or V

)), the current at that pin should be limited to 30

mA. The 120 mA maximum package input current limits the number of pins that can safely exceed the power supplies with an input current of 30 mA to four.

Note 4: The maximum power dissipation must he derated at elevated temperatures and is dictated by T

Jmax

, (maximum junction temperature), i

(package

junction to ambient thermal resistance), and T

(ambient temperature). The maximum allowable power dissipation at any temperature is P

Dmax

Jmax

or the number given in the Absolute Maximum Ratings, whichever is lower. For this device, T

Jmax

150

C, and the typical thermal resistance (i

)ofthe

ADC12041 in the V package, when board mounted, is 55

C/W, and in the SSOP package, when board mounted, is 130

C/W.

Note 5: Human body model, 100 pF discharged through 1.5 Xk resistor.

1 2 3 4 5 6 7 8 9 10 11 ... 29 30

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