3

LTC1668

Note 1: Absolute Maximum Ratings are those values beyond which the life

of the device may be impaired.

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Reference Input

Reference Small-Signal Bandwidth

kHz

Power Supply

Positive Supply Voltage

q

4.75

5

5.25

V

Negative Supply Voltage

q

– 4.75

– 5

– 5.25

V

Positive Supply Current

q

35

mA

Negative Supply Current

q

33

40

mA

Power Dissipation

q

180

mW

q

85

mW

Dynamic Performance (Differential Transformer Coupled Output, 50

Ω Double Terminated, Unless Otherwise Noted)

Maximum Update Rate

q

50

75

Msps

Output Settling Time

To 0.1% FSR

30

ns

Output Propagation Delay

8ns

Glitch Impulse

Single Ended

15

pV-s

Differential

5

pV-s

Output Rise Time

4ns

Output Fall Time

4ns

Output Noise

50

pA/

√Hz

30

pA/

√Hz

AC Linearity

SFDR

Spurious Free Dynamic Range

to Nyquist

0dB FS Output

78

87

dB

– 6dB FS Output

87

dB

–12dB FS Output

86

dB

–18dB FS Output

80

dB

84

dB

80

dB

77

dB

65

dB

Spurious Free Dynamic Range

86

96

dB

Within a Window

88

dB

THD

Total Harmonic Distortion

–84

–77

dB

–76

dB

Digital Inputs

Digital High Input Voltage

q

2.4

V

Digital Low Input Voltage

q

0.8

V

Digital Input Current

q

±10

µA

Digital Input Capacitance

5pF

Input Setup Time

q

8ns

Input Hold Time

q

4ns

Clock High Time

q

5ns

Clock Low Time

q

8ns