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ADS-941

5

Table 3. Output Coding

UNIPOLAR

INPUT VOLT.

OUTPUT CODING

INPUT VOLT.

BIPOLAR

SCALE

0 TO +10V

MSB

LSB

MSB

LSB

MSB

LSB

±5V

SCALE

+FS – 1 LSB

+9.999390

11 1111 1111 1111

00 0000 0000 0000

01 1111 1111 1111

+4.999390

+FS – 1LSB

+7/8 FS

+8.750000

11 1000 0000 0000

00 0111 1111 1111

01 1000 0000 0000

+3.750000

+3/4FS

+3/4 FS

+7.500000

11 0000 0000 0000

00 1111 1111 1111

01 0000 0000 0000

+2.500000

+1/2FS

+1/2 FS

+5.000000

10 0000 0000 0000

01 1111 1111 1111

00 0000 0000 0000

0.000000

0

+1/4 FS

+2.500000

01 0000 0000 0000

10 1111 1111 1111

11 0000 0000 0000

–2.500000

–1/2FS

+1/8 FS

+1.250000

00 1000 0000 0000

11 0111 1111 1111

10 1000 0000 0000

–3.750000

–3/4FS

+1 LSB

+0.000610

00 0000 0000 0001

11 1111 1111 1110

10 0000 0000 0001

–4.999390

–FS+1LSB

0

0.000000

00 0000 0000 0000

11 1111 1111 1111

10 0000 0000 0000

–5.000000

–FS

STRAIGHT BIN.

COMP. BINARY

OFF. BINARY

COMP. OFF. BIN.

TWO'S COMP.

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

–100

–110

–120

–130

–140

–150

Frequency (kHz)

(fs = 1MHz, fin = 480kHz, Vin = –0.5dB, 16,384-point FFT)

0

50

100

150

200

250

300

350

400

450

500