TC850 データシートの表示（PDF） - Microchip Technology

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TC850

15-Bit, Fast Integrating CMOS A/D Converter

Microchip Technology 

TC850

TABLE 1-1: TC850 ELECTRICAL SPECIFICATIONS (CONTINUED)

Electrical Characteristics: VS = ±5V; FCLK = 61.44kHz, VFS = 3.2768V, TA = 25°C, Figure 1-1, unless otherwise specified.

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

CIN

COUT

TCE

TRE

TDHC

TDHR

TOP

Input Capacitance

Output Capacitance

Chip-Enable Access Time

Read-Enable Access Time

Data Hold From CS or CE

Data Hold From RD

OVR/POL Data Access Time

—

1

—

pF Pins 1 - 7, 17

—

15

—

pF Pins 8 -15, High-impedance State

—

230

450

nsec CS or CE, RD = LOW (Note 1)

—

190

450

nsec CS = HIGH, CE = LOW, (Note 1)

—

250

450

nsec RD = LOW, (Note 1)

—

210

450

nsec CS = HIGH, CE = LOW, (Note 1)

—

140

300

nsec CS = HIGH, CE = LOW,

RD = LOW, (Note 1)

TLH Low/High Byte Access Time

—

140

300

nsec CS = HIGH, CE = LOW,

RD = LOW, (Note 1)

Clock Setup Time

100

—

—

nsec Positive or Negative Pulse Width

TWRE RD Minimum Pulse Width

450

230

—

nsec CS = HIGH, CE = LOW, (Note 2)

TWRD RD Minimum Delay Time

150

50

—

nsec CS = HIGH, CE = LOW, (Note 2)

TWWD WR Minimum Pulse Width

75

25

—

nsec CS = HIGH, CE = LOW, (Note 1)

Note 1: Demand mode, CONT/DEMAND = LOW. Figure 8-2 timing diagram. CL = 100 pF.

2: Continuous mode, CONT/DEMAND = HIGH. Figure 8-4 timing diagram.

3: Digital inputs have CMOS logic levels and internal pull-up/pull-down resistors. For TTL compatibility, external pull-up

resistors to VDD are recommended.

DS21479C-page 4

© 2006 Microchip Technology Inc.

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