Datasheet

TLV5626
2.7-V TO 5.5-V LOW-POWER DUAL 8-BIT DIGITAL-TO-ANALOG
CONVERTER WITH INTERNAL REFERENCE AND POWER DOWN
SLAS236A –JUNE 1999 – REVISED JUNE 2000
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
data bits: CONTROL
D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
X X X X X X X X X X REF1 REF0
X: don’t care
REF1 and REF0 determine the reference source and, if internal reference is selected, the reference voltage.
reference bits
REF1 REF0 REFERENCE
0 0 External
0 1 1.024 V
1 0 2.048 V
1 1 External
CAUTION:
If external reference voltage is applied to the REF pin, external reference MUST be selected.
examples of operation:
Set DAC A output, select fast mode, select internal reference at 2.048 V:
1. Set reference voltage to 2.048 V (CONTROL register):
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
1 1 0 1 0 0 0 0 0 0 0 0 0 0 1 0
2. Write new DAC A value and update DAC A output:
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
1 1 0 0 New DAC A output value 0 0 0 0
The DAC A output is updated on the rising clock edge after D0 is sampled.
To output data consecutively using the same DAC configuration, it is not necessary to program the CONTROL
register again.
Set DAC B output, select fast mode, select external reference:
3. Select external reference (CONTROL register):
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0
4. Write new DAC B value to BUFFER and update DAC B output:
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0 1 0 0 New BUFFER content and DAC B output value 0 0 0 0
X = Don’t care
The DAC A output is updated on the rising clock edge after D0 is sampled.
To output data consecutively using the same DAC configuration, it is not necessary to program the CONTROL
register again.