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Linear Technology Electronic Components Datasheet

LTC2704 Datasheet

Voltage Output SoftSpan DACs

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LTC2704 pdf
FEATURES
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
www.DataSheet14UL.ScoBmINL 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
U
APPLICATIO S
Process Control and Industrial Automation
Direct Digital Waveform Generation
Software Controlled Gain Adjustment
Automated Test Equipment
LTC2704
Quad 12-, 14- and 16-Bit
Voltage Output SoftSpan
DACs with Readback
DESCRIPTIO
The LTC®2704-16/LTC2704-14/LTC2704-12 are serial in-
put, 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.
, LT, LTC and LTM 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.
SI PLIFIED BLOCK DIAGRA
AGND V+1
32 42
VOSB 40
C1B 39
RFBB 37
OUTB 38
AGNDB 41
VOSA 4
C1A 5
DAC B
RFBA 7
OUTA 6
DAC A
AGNDA 3
33 34
GND VDD
V
REFM1 REFG1 REF1 REF2 REFG2 REFM2 V+2 1,8,15,22,31,36
44 2 43 24 21 23 25
27 VOSC
28 C1C
DAC C
30 RFBC
29 OUTC
–1 –1
26 AGNDC
19 VOSD
DAC D
18 C1D
16 RFBD
17 OUTD
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
2704f
1


Linear Technology Electronic Components Datasheet

LTC2704 Datasheet

Voltage Output SoftSpan DACs

No Preview Available !

LTC2704 pdf
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,
www.DataShReeEtF4UM.c1omto 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
PACKAGE/ORDER INFORMATION
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
ORDER PART
NUMBER
LTC2704CGW-16
LTC2704IGW-16
LTC2704CGW-14
LTC2704IGW-14
LTC2704CGW-12
LTC2704IGW-12
GW PACKAGE
44-LEAD PLASTIC SSOP
TJMAX = 125°C, θJA = 80°C/W
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C,
V+1 = V+2 = 15V, V= –15V, VDD = 5V, REF1 = REF2 = 5V, AGND = AGNDx = REFG1 = REFG2 = GND = 0V.
SYMBOL PARAMETER
CONDITIONS
LTC2704-12
LTC2704-14
LTC2704-16
MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
Accuracy
Resolution
12 14 16
Bits
Monotonicity
12 14 16
Bits
INL Integral Nonlinearity
VREF = 5V
DNL Differential Nonlinearity VREF = 5V
GE Gain Error
VREF = 5V
Gain Temperature
Coefficient
Gain/Temperature
±1
±1
±0.5 ±2
±2
±1
±1
±1 ±5
±2
±2 LSB
±1 LSB
±4 ±20 LSB
±2 ppm/°C
VOS Unipolar Zero-Scale Error Span = 0V to 5V, TA = 25°C
Span = 0V to 10V, TA = 25°C
Span = 0V to 5V
Span = 0V to 10V
±80 ±200
±100 ±300
±140 ±400
±150 ±600
±80 ±200
±100 ±300
±140 ±400
±150 ±600
±80 ±200
±100 ±300
±140 ±400
±150 ±600
µV
µV
µV
µV
2704f
2


Part Number LTC2704
Description Voltage Output SoftSpan DACs
Maker Linear Technology
Total Page 20 Pages
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LTC2704 pdf
LTC2704 Datasheet PDF
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