LTC2704CGW-14#PBF Linear Technology, LTC2704CGW-14#PBF Datasheet - Page 12

• Manufacturer Part Number: LTC2704CGW-14#PBF
• Description: IC DAC 14BIT QUAD VOUT 44-SSOP
• Manufacturer: Linear Technology

Specifications of LTC2704CGW-14#PBF

• Settling Time: 9µs
• Number Of Bits: 14
• Data Interface: Serial, SPI™
• Number Of Converters: 4
• Voltage Supply Source: Analog and Digital, Dual ±
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power Dissipation (max): -

LTC2704
OPERATION
OUTPUT RANGES
The LTC2704 is a quad DAC with software-programmable
output ranges. SoftSpan provides two unipolar output
ranges (0V to 5V and 0V to 10V), and four bipolar ranges
(±2.5V, ±5V, ±10V and – 2.5V to 7.5V). These ranges are
obtained when an external precision 5V reference and
analog supplies of ±12V to ±15V are used. When a refer-
ence voltage of 2V and analog supplies of ±5V are used,
12
Table 2. Address Codes
Codes not shown are reserved and should not be used.
A3
0
0
0
0
1
A2
0
0
1
1
1
A1
0
1
0
1
1
Table 1. Command Codes
Codes not shown are reserved and should not be used.
Note 1: Normal operation can be resumed by issuing any update B1→B2 command to the sleeping DAC.
C3
0
0
0
0
0
0
1
1
1
1
1
1
1
1
A0
0
0
0
0
1
C2
0
0
1
1
1
1
0
0
0
0
1
1
1
1
CODE
All DACs
DAC A
DAC B
DAC C
DAC D
C1
n
1
1
0
0
1
1
0
0
1
1
0
0
1
1
C0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
READBACK POINTER n
Update B1→B2 All DACs
Update B1→B2 All DACs
Update B1→B2 All DACs
Write to B1 Span DAC n
Write to B1 Code DAC n
Write to B1 Span DAC n
Write to B1 Code DAC n
Write to B1 Span DAC n
Write to B1 Code DAC n
Update B1→B2 DAC n
Update B1→B2 DAC n
Update B1→B2 DAC n
Read B1 Span DAC n
Read B1 Code DAC n
Read B2 Span DAC n
Read B2 Code DAC n
Sleep DAC n (Note 1)
No Operation
COMMAND
DAC A
DAC B
DAC C
DAC D
DAC A
CURRENT INPUT WORD W
Set by Previous Command
Set by Previous Command
Set by Previous Command
Set by Previous Command
Set by Previous Command
Set by Previous Command
Set by Previous Command
Set by Previous Command
Set by Previous Command
Set by Previous Command
READBACK POINTER—
the SoftSpan ranges become: 0V to 2V, 0V to 4V, ±1V, ±2V,
±4V and –1V to 3V. The output ranges are linearly scaled
for references other than 2V and 5V (appropriate analog
supplies should be used within the range ±5V to ±15V).
Each of the four DACs can be programmed to any one of
the six output ranges. DAC outputs can swing to ±10V
on ±10.8V supplies (±12V supplies with ±10% tolerance)
while sourcing or sinking 5mA of load current.
Table 3. Span Codes
Codes not shown are reserved and should not be used.
S3
0
0
0
0
0
0
S2
0
0
0
0
1
1
S1
0
0
1
1
0
0
B1 Span DAC n
B1 Code DAC n
B2 Span DAC n
B2 Code DAC n
S0
0
1
0
1
0
1
O
SPAN
Unipolar 0V to 5V
Unipolar 0V to 10V
Bipolar –5V to 5V
Bipolar –10V to 10V
Bipolar –2.5V to 2.5V
Bipolar –2.5V to 7.5V
NEXT INPUT WORD W
READBACK POINTER—
B1 Span DAC n
B1 Code DAC n
B2 Span DAC n
B2 Code DAC n
B2 Span DAC n
B2 Code DAC n
B2 Span DAC n
B2 Code DAC n
B2 Span DAC n
B2 Code DAC n
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