LTC2704 DACs Datasheet

LTC2704 Datasheet, PDF, Equivalent


Part Number

LTC2704

Description

Voltage Output SoftSpan DACs

Manufacture

Linear Technology

Total Page 22 Pages
Datasheet
Download LTC2704 Datasheet


LTC2704
FEATURES
n Six Programmable Output Ranges:
Unipolar: 0V to 5V, 0V to 10V
Bipolar: ±5V, ±10V, ±2.5V, –2.5V to 7.5V
n Serial Readback of All On-Chip Registers
n 1LSB INL and DNL Over the Industrial
Temperature Range (LTC2704-14/LTC2704-12)
n Force/Sense Outputs Enable Remote Sensing
n Glitch Impulse: < 2nV-sec
n Outputs Drive ±5mA
n Pin Compatible 12-, 14- and 16-Bit Parts
n Power-On and Clear to Zero Volts
n 44-Lead SSOP Package
APPLICATIONS
n Process Control and Industrial Automation
n Direct Digital Waveform Generation
n Software Controlled Gain Adjustment
n Automated Test Equipment
LTC2704
Quad 12-, 14- and 16-Bit
Voltage Output SoftSpan
DACs with Readback
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.
BLOCK DIAGRAM
AGND V+1
32 42
V
REFM1 REFG1 REF1 REF2 REFG2 REFM2 V+2 1,8,15,22,31,36
44 2 43 24 21 23 25
VOSB 40
27 VOSC
C1B 39
28 C1C
RFBB 37
30 RFBC
DAC B
DAC C
OUTB 38
29 OUTC
AGNDB 41
–1 –1
26 AGNDC
VOSA 4
19 VOSD
C1A 5
RFBA 7
OUTA 6
DAC A
DAC D
18 C1D
16 RFBD
17 OUTD
AGNDA 3
33 34
GND VDD
10 13 11 14 9 35 12
CS/LD SCK SDI CLR LDAC RFLAG SRO
20 AGNDD
2704 BD
LTC2704-16
Integral Nonlinearity (INL)
1.0 V+/V= ±15V
0.8 VREF = 5V
±10V RANGE
0.6
ALL 4 DACS
0.4 SUPERIMPOSED
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
16384
32768
CODE
49152
65535
2704 TA01b
2704fd
1

LTC2704
LTC2704
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Total Supply Voltage V+1, V+2 to V........... –0.3V to 36V
V+1, V+2, REF1, REF2, REFM1, REFM2,
OUTx, RFBx, VOSx to GND, AGND,
AGNDx, C1x, REFG1, REFG2.....................................18V
GND, AGND, AGNDx, C1x, REFG1, REFG2 to V+1,
V+2, V, REF1, REF2, REFM1, REFM2, OUTx,
RFBx, VOSx ...............................................................18V
OUTA, RFBA, VOSA, OUTB, RFBB, VOSB, REF1,
REFM1 to GND, AGND ............... V– 0.3V to V+1 + 0.3V
OUTC, RFBC, VOSC, OUTD, RFBD, VOSD, REF2, REFM2
to GND, AGND............................ V– 0.3V to V+2 + 0.3V
VDD, Digital Inputs/Outputs to GND ............. –0.3V to 7V
Digital Inputs/Outputs to VDD ..................................0.3V
GND, AGNDx, REFG1, REFG2 to AGND..................±0.3V
C1x to AGNDx ........................................................±0.3V
Vto Any Pin ...........................................................0.3V
Maximum Junction Temperature.......................... 150°C
Operating Temperature Range
LTC2704C ................................................ 0°C to 70°C
LTC2704I..............................................– 40°C to 85°C
Storage Temperature Range...................– 65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
PIN CONFIGURATION
V1
REFG1 2
AGNDA 3
VOSA 4
C1A 5
OUTA 6
RFBA 7
V8
LDAC 9
CS/LD 10
SDI 11
SRO 12
SCK 13
CLR 14
V15
RFBD 16
OUTD 17
C1D 18
VOSD 19
AGNDD 20
REFG2 21
V22
TOP VIEW
44 REFM1
43 REF1
42 V+1
41 AGNDB
40 VOSB
39 C1B
38 OUTB
37 RFBB
36 V
35 RFLAG
34 VDD
33 GND
32 AGND
31 V
30 RFBC
29 OUTC
28 C1C
27 VOSC
26 AGNDC
25 V+2
24 REF2
23 REFM2
GW PACKAGE
44-LEAD PLASTIC SSOP
TJMAX = 125°C, θJA = 80°C/W
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC2704CGW-16#PBF
LTC2704CGW-16#TRPBF LTC2704CGW-16
44-Lead Plastic SSOP
LTC2704IGW-16#PBF
LTC2704IGW-16#TRPBF LTC2704IGW-16
44-Lead Plastic SSOP
LTC2704CGW-14#PBF
LTC2704CGW-14#TRPBF LTC2704CGW-14
44-Lead Plastic SSOP
LTC2704IGW-14#PBF
LTC2704IGW-14#TRPBF LTC2704IGW-14
44-Lead Plastic SSOP
LTC2704CGW-12#PBF
LTC2704CGW-12#TRPBF LTC2704CGW-12
44-Lead Plastic SSOP
LTC2704IGW-12#PBF
LTC2704IGW-12#TRPBF LTC2704IGW-12
44-Lead Plastic SSOP
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
2704fd
2


Features FEATURES n Six Programmable Output Range s: Unipolar: 0V to 5V, 0V to 10V Bipola r: ±5V, ±10V, ±2.5V, –2.5V to 7.5V n Serial Readback of All On-Chip Regis ters n 1LSB INL and DNL Over the Indust rial Temperature Range (LTC2704-14/LTC2 704-12) n Force/Sense Outputs Enable Re mote Sensing n Glitch Impulse: < 2nV-se c n Outputs Drive ±5mA n Pin Compatibl e 12-, 14- and 16-Bit Parts n Power-On and Clear to Zero Volts n 44-Lead SSOP Package APPLICATIONS n Process Control and Industrial Automation n Direct Digi tal Waveform Generation n Software Cont rolled Gain Adjustment n Automated Test Equipment LTC2704 Quad 12-, 14- and 1 6-Bit Voltage Output SoftSpan DACs with Readback DESCRIPTION The LTC®2704-16/ LTC2704-14/LTC2704-12 are serial input, 12-, 14- or 16-bit, voltage output Sof tSpan™ DACs that operate from 3V to 5 V logic and ±5V to ±15V analog suppli es. SoftSpan offers six output spans— two unipolar and four bipolar—fully p rogrammable through the 3-wire SPI serial interface. INL is accurate to 1LSB (.
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