Lattice Semiconductor

ispPAC81 Data Sheet

3

AC Electrical Characteristics

Symbol

Parameter

Condition

Min.

Typ.

Max.

Units

Dynamic Performance (4)

SNR

Signal to Noise (G=1 to 10)

86

dB

THD

Total Harmonic Distortion (Differential)

-80

-80

-72

-72

dB

dB

CMR

48

60

dB

Filter Characteristics (4)

Absolute Corner Frequency Accuracy

Deviation from calculated -3db point

0.8

%

Max Delta Between Filters (Computed)

Butterworth, 10kHz to 60kHz

0.6

3.6

%

0.03

%/°C

0.09

%/°V

Elliptic Filter Response (5)

Passband Ripple

Passband Ripple

1.4

1.5

dB

dB

Power Supplies

Operating Supply Voltage

4.75

5

5.25

V

Supply Current

26.5

33

mA

Power Dissipation

133

165

mW

Temperature Range

Operation

-40

85

°C

Storage

-65

150

°C

Notes: (1) A wider input range of 0.7V to 4.3V is typical, but not guaranteed. Inputs larger than this will be clipped. Input signals are also subject

to common-mode voltage limitations. Refer to the table of conditions in this data sheet. (2) Refer to theory of operation section later in this data

sheet for explanation of differential voltage swing computation. (3) To insure full spec performance an additional auto-calibration should be per-

formed after initial turn-on and the device reaches thermal stability. (4) Although many hundreds of thousands of filter configurations are avail-

able using ispPAC81, not every type will have corner frequencies available from exactly 10kHz to 75kHz, depending on the tables available

from within PAC-Designer filter design tools. The general specifications given under this heading are realized using the Elliptic filter types. For

more information on other types and/or frequencies not contained in the filter database, please contact Lattice Marketing. (5) A Cauer elliptic fil-

ter of type CC051042 (see data sheet text) is used to guarantee these specific filter accuracy specifications. It is assumed that all other config-

urations available in PAC-Designer will exhibit equivalent performance according to the applicability of the individual filter type. Necessary

limitations will apply, however, when specifications do not directly apply. See the data sheet text, application notes and guides in PAC-Designer

for specific filter type considerations.