6

LTC1605

LTC1605 Nonaveraged 4096 Point FFT Plot

FREQUENCY (kHz)

–130

–120

–100

–110

–80

–90

–20

–40

–60

0

–30

–50

–70

–10

1605 • TPC07

0

5

10

15

20

25

30

35

40

45

50

SINAD =87.5dB

THD =–101.7dB

SINAD vs Input Frequency

INPUT FREQUENCY (kHz)

1

90

89

88

87

86

85

84

83

82

81

10

100

1605 • TPC08

Total Harmonic Distortion vs

Input Frequency

INPUT FREQUENCY (kHz)

1

–70

–80

–90

–100

–110

10

100

1605 • TPC09

resistor to the analog input. Full-scale input range is

±10V.

AGND1 (Pin 2): Analog Ground. Tie to analog ground

plane.

REF (Pin 3): 2.5V Reference Output. Bypass with 2.2

µF

tantalum capacitor. Can be driven with an external refer-

ence.

CAP (Pin 4): Reference Buffer Output. Bypass with 2.2

µF

tantalum capacitor.

AGND2 (Pin 5): Analog Ground. Tie to analog ground

plane.

D15 to D8 (Pins 6 to 13): Three-State Data Outputs.

Hi-Z state when CS is high or when R/C is low.

DGND (Pin 14): Digital Ground.

D7 to D0 (Pins 15 to 22): Three-State Data Outputs.

Hi-Z state when CS is high or when R/C is low.

BYTE (Pin 23): Byte Select. With BYTE low, data will be

output with Pin 6 (D15) being the MSB and Pin 22 (D0)

being the LSB. With BYTE high the upper eight bits and

the lower eight bits will be switched. The MSB is output