LTC1661CMS8 Linear Technology, LTC1661CMS8 Datasheet - Page 9

• Manufacturer Part Number: LTC1661CMS8
• Description: IC D/A CONV 10BIT MICRPWR 8-MSOP
• Manufacturer: Linear Technology

Specifications of LTC1661CMS8

• Settling Time: 30µs
• Number Of Bits: 10
• Data Interface: Serial
• Number Of Converters: 2
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 260µW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

OPERATION
Table 2. DAC Control Functions
CS/LD
A3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
SCK
D
IN
CONTROL
A2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
A1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
A0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Load DACs A, B with
Same 10-Bit Code
INPUT REGISTER
Load DAC A
Load DAC B
Load DAC A
Load DAC B
(SCK ENABLED)
No Change
No Change
No Change
No Change
STATUS
A3
1
CONTROL CODE
A2
2
A1
3
DAC REGISTER
Update Outputs
Update Outputs
Update Outputs
Update Outputs
A0
No Update
No Update
No Update
No Update
No Update
4
STATUS
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Figure 1. Register Loading Sequence
D9
5
D8
6
D7
POWER-DOWN STATUS
7
INPUT WORD W
(SLEEP/WAKE)
D6
No Change
No Change
No Change
8
Wake
Wake
Wake
Wake
Sleep
Wake
INPUT CODE
D5
9
0
D4
10
D3
11
COMMENTS
No Operation. Power-Down Status Unchanged
(Part Stays in Wake or Sleep Mode)
Load Input Register A with Data. DAC Outputs
Unchanged. Power-Down Status Unchanged
Load Input Register B with Data. DAC Outputs
Unchanged. Power-Down Status Unchanged
Load Both DAC Regs with Existing Contents of Input
Regs. Outputs Update. Part Wakes Up
Load Input Reg A. Load DAC Regs with New Contents
of Input Reg A and Existing Contents of Reg B. Outputs
Update. Part Wakes Up
Load Input Reg B. Load DAC Regs with Existing
Contents of Input Reg A and New Contents of Reg B.
Outputs Update. Part Wakes Up
Part Wakes Up. Input and DAC Regs Unchanged. DAC
Outputs Reflect Existing Contents of DAC Regs
Part Goes to Sleep. Input and DAC Regs Unchanged.
DAC Outputs Set to High Impedance State
Load Both Input Regs. Load Both DAC Regs with New
Contents of Input Regs. Outputs Update. Part Wakes Up
D2
12
D1
13
D0
14
DON’T CARE
X1
15
X0
16
LTC1661
(LTC1661
RESPONDS)
1661fa
1661 F01
9