HS-32 查看數據表（PDF） - DATEL Data Acquisition products

零件编号

产品描述 (功能)

生产厂家

HS-32

14-Bit, 2MHz, Low-Power Sampling A/D Converters

DATEL Data Acquisition products  

ADS-942A

Use external trimpots to remove system errors or to reduce

small initial errors to zero. Use a 100Ω trimpot in series

with the analog input for gain adjustment; use a fixed 50Ω

resistor in its place for operation without adjustment.

®

®

Use a 20kΩ trimpot with the wiper tied to OFFSET ADJUST

(pin 5) for zero/offset adjustment. Connect pin 5 to ANA-

LOG GROUND (pin 6) for operation without zero/offset

adjustment.

ZERO/OFFSET

ADJUST

20kΩ

+15V

–15V

+5V

4.7µF

0.1µF

4.7µF 0.1µF

–5V

10

11

DIGITAL

GROUND

14

5

OFFSET

ADJUST

+15V

4.7µF

0.1µF

4.7µF 0.1µF

–15V

GAIN ADJUST

12

6, 15

ANALOG

GROUND

13

ADS-942A

0 to +10V

100Ω

3 ANALOG INPUT

4 SIGNAL GROUND

0.1µF

4.7µF

1 +10V REF. OUT

CODING SELECT 8

START CONVERT 32

ENABLE 9

BIPOLAR 2

31 BIT 1 OUT(MSB)

30 BIT 1 OUT(MSB)

29 BIT 2 OUT

28 BIT 3 OUT

27 BIT 4 OUT

26 BIT 5 OUT

25 BIT 6 OUT

24 BIT 7 OUT

23 BIT 8 OUT

22 BIT 9 OUT

21 BIT 10 OUT

20 BIT 11 OUT

19 BIT 12 OUT

18 BIT 13 OUT

17 BIT 14 OUT (LSB)

7 OVERFLOW

16 EOC

+5V

Figure 3. ADS-942A Connection Diagram (Unipolar Input)

UNIPOLAR

SCALE

+FS – 1 LSB

+7/8 FS

+3/4 FS

+1/2 FS

+1/4 FS

+1/8 FS

+1 LSB

0

INPUT VOLT.

0 TO +10V

+9.999390

+8.750000

+7.500000

+5.000000

+2.500000

+1.250000

+0.000610

0.000000

Table 3. Output Coding

STRAIGHT BIN.

COMP. BINARY

MSB

OUTPUT CODING

LSB MSB

LSB

MSB

INPUT VOLT.

LSB

±5V

11 1111 1111 1111

11 1000 0000 0000

11 0000 0000 0000

10 0000 0000 0000

01 0000 0000 0000

00 1000 0000 0000

00 0000 0000 0001

00 0000 0000 0000

00 0000 0000 0000

00 0111 1111 1111

00 1111 1111 1111

01 1111 1111 1111

10 1111 1111 1111

11 0111 1111 1111

11 1111 1111 1110

11 1111 1111 1111

01 1111 1111 1111

01 1000 0000 0000

01 0000 0000 0000

00 0000 0000 0000

11 0000 0000 0000

10 1000 0000 0000

10 0000 0000 0001

10 0000 0000 0000

+4.999390

+3.750000

+2.500000

0.000000

–2.500000

–3.750000

–4.999390

–5.000000

OFF. BINARY

COMP. OFF. BIN.

TWO'S COMP.

BIPOLAR

SCALE

+FS – 1LSB

+3/4FS

+1/2FS

0

–1/2FS

–3/4FS

–FS+1LSB

–FS

4

Share Link: