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AS1504, AS1505

Data Sheet

The AS1504 provides a mid-scale reset activated by pin RSN which simplifies settings on initial power up. The AS1505

settings to optimize resolution. -

Both devices feature a power-on reset which resets them to mid-scale.

Both models feature a low-power shutdown mode which places the device into low power-consumption mode resulting

DACx latch settings are maintained. When returning to normal operation from shutdown mode, the DACx outputs

return to their previous voltage settings.

Figure 13. Serial Data Input Timing Diagram; RSN = 1

Figure 14. Reset Timing Diagram

Table 5. AS1504/AS1505 Serial Data Word Format

Address Bits

Data Bits

B10

B9

B8

B7

B6

B5

B4

B3

B2

B1

B0

A2

A1

A0

D7

D6

D5

D4

D3

D2

D1

D0

MSB

LSB

MSB

LSB

2

10

2

9

2

8

2

7

2

6

2

5

2

4

2

3

2

2

2

1

2

0

± 1 LSB Error Band

SDI

CLK

CSN

Ax or Dx

Ax or Dx

1

0

1

0

1

0

+5V

0V

± 1 LSB

+5V

+2.5V

± 1 LSB Error Band

± 1 LSB

RSN

1

0