Rainbow-electronics DS1680 Manual do Utilizador descarregar pdf (Página 19)

DS1680

19 of 23

ADC CHARACTERISTICS (0°C to +70°C; V

CC

, V

AVD

= 3.3V ± 10%)

PARAMETER SYMBOL MIN TYP MAX UNITS

NOTES

Resistance of Digitizer Film R

D

250 600 1000 Ω

Resistance of On-Chip Driver R

DRIVER

15 30 Ω

Parasitic Capacitance Between X-

and Y-Plates of Digitizer

C

XY

5 10 nF

Ladder Resistance R

REF

8 25 60 kΩ

ADC Active Current I

AVDA

320 450 µA 5

ADC Standby Current I

AVDS

50 150 µA 6

Reference Current I

REF

150 550 µA

Input Leakage (AIN0, AIN1) I

LI

10 nA

Analog Input Capacitance C

IN

10 15 pF

Resolution 10 Bits

Differential Nonlinearity E

DL

±0.5 ±1.0 LSB

Integral Nonlinearity E

IL

±0.5 ±1.0 LSB

Offset Error E

OS

±1.0 ±1.5 LSB

Gain Error E

G

±0.25 ±1.0 %

ADC Clock Frequency F

OSCIN

2.5 MHz

Multiplexer Selector Path

Propagation Delay

t

MUX

120 ns

COEN Falling Edge to Data Bus

Driven

t

OEA

80 ns

COEN Rising Edge to Data Bus

High-Z

t

OEZ

80 ns

POWER-FAIL AND RESET CHARACTERISTICS

(0°C to +70°C; V

CC

= 5.0V ± 10%)

PARAMETER SYMBOL MIN TYP MAX UNITS

NOTES

PFI Low to PFO Low

t

PFD

100 ns

PFI High to PFO High

t

PFU

100 ns

V

CC

Detect to RST (V

CC

Falling)

t

RPD

100 ns

V

CC

Detect to RST (V

CC

Rising)

t

RPU

250 ms 15,16

Reset Active Time t

RST

250 ms 15

Pushbutton Debounce PB

DB

250 ms 15

ST Pulse Width

t

ST

20 ns

Chip-Enable Propagation Delay to

External SRAM

t

CED

8 15 ns

V

CCTP(MAX)

to V

CCSW(MIN)

Fall Time t

FB

200 µs 20

1 2 ... 14 15 16 17 18 19 20 21 22 23

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