4

LTC1821

Note 8: To 0.0015% for a full-scale change, measured from the rising

edge of LD.

Note 9: REF = 0V. DAC register contents changed from all 0s to all 1s or all

1s to all 0s. LD low and WR high.

Note 10: Midscale transition code: 0111 1111 1111 1111 to

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

of a device may be impaired.

Note 2:

±1LSB = ±0.0015% of full scale = ±15.3ppm of full scale.

Note 3: Using internal feedback resistor.

Note 4: Guaranteed by design, not subject to test.

Note 6: Typical temperature coefficient is 100ppm/

°C.

Note 7: Measured in unipolar mode.

ELECTRICAL CHARACTERISTICS

TYPICAL PERFOR A CE CHARACTERISTICS

TIME (

µs)

0

–10

0

10

0.6

1.0

1821 G01

–20

–30

–40

0.2

0.4

0.8

20

30

40

1nV-s TYPICAL

FREQUENCY (Hz)

–90

–70

–50

–40

10

1k

10k

100k

1821 G03

–110

100

–60

–80

–100

500kHz FILTER

80kHz FILTER

30kHz FILTER

LD PULSE

5V/DIV

GATED

SETTLING

WAVEFORM

500

µV/DIV

500ns/DIV

1821 G02

0V TO 10V STEP

FREQUENCY (Hz)

–90

–70

–50

–40

10

1k

10k

100k

1821 G04

–110

100

–60

–80

–100

500kHz FILTER

80kHz FILTER

30kHz

FILTER

FREQUENCY (Hz)

–90

–70

–50

–40

10

1k

10k

100k

1821 G05

–110

100

–60

–80

–100

500kHz FILTER

80kHz FILTER

30kHz FILTER

INTPUT VOLTAGE (V)

0

3

4

5

4

1821 G06

2

1

0

1

2

3

5

ALL DIGITAL INPUTS

TIED TOGETHER

Midscale Glitch Impulse

Unipolar Multiplying Mode

Signal-to-(Noise + Distortion)

vs Frequency

Full-Scale Setting Waveform

Bipolar Multiplying Mode

Signal-to-(Noise + Distortion)

vs Frequency, Code = All Zeros

Bipolar Multiplying Mode

Signal-to-(Noise + Distortion)

vs Frequency, Code = All Ones

Input Voltage