4 Specifications

4.1 Absolute Maximum Specifications

Operating temp................................................................................ as designated by suffix

Max continuous pin current, any control or drive pin .............................................................. ±20mA

Short circuit duration to ground, any pin ......................................................................... infinite

Voltage forced onto any pin................................................................... -0.3V to (Vdd + 0.3) Volts

4.2 Recommended Operating Conditions

Operating temperature range, 4.0V - 5.5V................................................................... -40 - +85C

Operating frequency, 4.0V - 5.5V............................................................................. 100 kHz

Short-term supply ripple+noise .................................................................................. ±5mV

Long-term supply stability.................................................................................... ±100mV

Cs (reference capacitors) value......................................................................... 4.7nF to 47nF

Cx (SNS load capacitance) maximum value....................................................................... 50pF

4.3 AC Specifications

Vdd = 4.0, Ta = recommended, Cx = 10pF, Cs = 10nF, Rosc = 62K ohms

Fast mode only

bursts

6

Spread spectrum drive interval

% of Fosc; Fast mode only;

Circuit of Figure 1.2

%

±7

Spread spectrum freq deviation

Either speed mode

kHz

120

100

80

Acquisition center frequency

Fast mode

Slow mode

ms

ms

40

110

Response time to output

Either speed mode

counts

400

Burst length, each channel

Either speed mode

ms

4

Burst duration, all channels

Either speed mode

µs

8

Clamp duration

Either speed mode

µs

2

Pulse duration

Fast mode

Slow mode

ms

ms

180

280

Recalibration time from cold

start or hard reset

Notes

Units

Max

Typ

Min

Description

Parameter

4.4 DC Specifications

Vdd = 4.0V, Cx = 10pF, Cs = 10nF, Fosc = 100kHz, Ta = recommended range, unless otherwise noted

bits

9

Acquisition resolution

OPT1, OPT2, OPT3

µA

±1

Input leakage current

OUTn, 1mA source

V

Vdd-0.7

High output voltage

OUTn, 4mA sink

V

0.6

Low output voltage

SYNC

V

0.7Vdd

High input logic level

SYNC

V

0.3Vdd

Low input logic level

/RES

V

0.9Vdd

High input logic level

/RES

V

0.4Vdd

Low input logic level

Required for startup, w/o reset circuit

V/s

100

Supply turn-on slope

Fast mode

Slow mode, no Sync

mA

µA

1.5

90

Supply current

Notes

Units

Max

Typ

Min

Description

Parameter

9

QT240R R1.11/1006