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LTC2704CGW-12#TRPBF

Description
IC DAC 12BIT QUAD VOUT 44-SSOP
Categorysemiconductor    Analog mixed-signal IC   
File Size352KB,22 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC2704CGW-12#TRPBF Overview

IC DAC 12BIT QUAD VOUT 44-SSOP

LTC2704CGW-12#TRPBF Parametric

Parameter NameAttribute value
Number of digits12
Number of digital-to-analog converters4
Setup time8µs (standard)
Output typeVoltage - Buffered
Differential outputnone
Data interfaceSPI
Reference typeexternal
Voltage - Power, Analog±4.5 V ~ 16.5 V
Voltage - Power, Digital2.7 V ~ 5.5 V
INL/DNL(LSB)±1 (maximum), ±1 (maximum)
Architecture-
Operating temperature0°C ~ 70°C
Package/casing44-BSOP (0.295", 7.50mm wide)
Supplier device packaging44-SSOP
LTC2704
Quad 12-, 14- and 16-Bit
Voltage Output SoftSpan
DACs with Readback
FEATURES
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DESCRIPTION
The LTC
®
2704-16/LTC2704-14/LTC2704-12 are serial
input, 12-, 14- or 16-bit, voltage output SoftSpan™ DACs
that operate from 3V to 5V logic and ±5V to ±15V analog
supplies. SoftSpan offers six output spans—two unipolar
and four bipolar—fully programmable through the 3-wire
SPI serial interface. INL is accurate to 1LSB (2LSB for the
LTC2704-16). DNL is accurate to 1LSB for all versions.
Readback commands allow verification of any on-chip
register in just one 24- or 32- bit instruction cycle. All other
commands produce a “rolling readback” response from
the LTC2704, dramatically reducing the needed number
of instruction cycles.
A Sleep command allows any combination of DACs to be
powered down. There is also a reset flag and an offset
adjustment pin for each channel.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. SoftSpan is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
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Six Programmable Output Ranges:
Unipolar: 0V to 5V, 0V to 10V
Bipolar: ±5V, ±10V, ±2.5V, –2.5V to 7.5V
Serial Readback of All On-Chip Registers
1LSB INL and DNL Over the Industrial
Temperature Range (LTC2704-14/LTC2704-12)
Force/Sense Outputs Enable Remote Sensing
Glitch Impulse: < 2nV-sec
Outputs Drive ±5mA
Pin Compatible 12-, 14- and 16-Bit Parts
Power-On and Clear to Zero Volts
44-Lead SSOP Package
APPLICATIONS
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Process Control and Industrial Automation
Direct Digital Waveform Generation
Software Controlled Gain Adjustment
Automated Test Equipment
BLOCK DIAGRAM
AGND
32
VOSB 40
C1B 39
RFBB 37
DAC B
OUTB 38
AGNDB 41
VOSA 4
C1A 5
RFBA 7
DAC A
OUTA 6
AGNDA 3
33
34
10
13
11
SDI
14
CLR
9
35
12
DAC D
17 OUTD
20 AGNDD
GND V
DD
CS/LD
SCK
LDAC RFLAG
SRO
2704 BD
V
+1
42
V
REFM1 REFG1 REF1 REF2 REFG2 REFM2 V
+2
1,8,15,22,31,36
24
21
44
2
23
43
25
27 VOSC
28 C1C
DAC C
–1
–1
26 AGNDC
19 VOSD
18 C1D
16 RFBD
30 RFBC
29 OUTC
LTC2704-16
Integral Nonlinearity (INL)
1.0
V+/V
= ±15V
0.8 V
REF
= 5V
±10V RANGE
0.6
ALL 4 DACS
0.4 SUPERIMPOSED
INL (LSB)
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384
32768
CODE
49152
65535
2704 TA01b
2704fd
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