SoftSpan DACs. LTC2704 Datasheet

LTC2704 DACs. Datasheet pdf. Equivalent


Linear Technology 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
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LTC2704 Datasheet
Recommendation LTC2704 Datasheet
Part LTC2704
Description Voltage Output SoftSpan DACs
Feature LTC2704; FEATURES n Six Programmable Output Ranges: Unipolar: 0V to 5V, 0V to 10V Bipolar: ±5V, ±10V, ±2.5V, .
Manufacture Linear Technology
Datasheet
Download LTC2704 Datasheet




Linear Technology 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
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Linear Technology LTC2704
LTC2704
ELECTRICAL CHARACTERISTICS The l 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
l 12 14 16
Bits
Monotonicity
l 12 14 16
Bits
INL Integral Nonlinearity VREF = 5V
DNL Differential Nonlinearity VREF = 5V
GE Gain Error
VREF = 5V
Gain Temperature
Coefficient
ΔGain/ΔTemperature
l ±1
l ±1
l ±0.5 ±2
l ±2
±1
±1
±1 ±5
±2
±2
±1
±4 ±20
±2
LSB
LSB
LSB
ppm/°C
VOS
Unipolar Zero-Scale
Span = 0V to 5V, TA = 25°C
Error Span = 0V to 10V, TA = 25°C
Span = 0V to 5V
Span = 0V to 10V
±80 ±200
± 80 ±200
±80 ±200
μV
±100 ±300
±100 ±300
±100 ±300
μV
l ±140 ±400 ±140 ±400 ±140 ±400 μV
l ±150 ±600 ±150 ±600 ±150 ±600 μV
VOS Temperature
Coefficient
0V to 5V Range
0V to 10V Range
l ±2 ±2 ±2 μV/°C
l ±2 ±2 ±2 μV/°C
BZE Bipolar Zero
Error
All Bipolar Ranges
±0.25 ±1
l ±2
±0.5 ±2
±2.5
±2 ±8
±12
LSB
LSB
PSRR
Power Supply
Rejection Ratio
VDD = 5V ±10% (Note 3)
VDD = 3V ±10% (Note 3)
0V to 10V Range, Code = 0
V+/V= ±15V ±10% (Note 2)
V+/V= ±5V ±10%, VREF = 2V (Note 2)
l
l
±0.003
±0.006
±0.001 ±0.06
±0.002 ±0.05
±0.013
±0.025
±0.005 ±0.25
±0.01 ±0.13
±0.05
±0.1
±0.02 ±0.1
±0.04 ±0.5
LSB/V
LSB/V
LSB/V
LSB/V
Analog Outputs (Note 4)
Settling Time
Output Swing
Load Current
Load Regulation
0V to 5V Range, 5V Step, to ±1LSB
0V to 10V or ±5V Range,
10V Step, to ±1LSB
±10V Range, 20V Step, to ±1LSB
V+/V= ±15V, VREF = ±7.25V,
0V to 10V Range, ILOAD = ±3mA (Note 2)
V+/V= ±5V, VREF = ±2.25V,
0V to 10V Range, ILOAD = ±2.5mA (Note 2)
V+/V= ±10.8V to ±16.5V, VREF = ±5V,
0V to 10V Range, VOUT = ±10V (Note 2)
V+/V= ±4.5V to ±16.5V, VREF = ±2V,
0V to 10V Range, VOUT = ±4V (Note 2)
V+/V= ±15V, VREF = 5V,
0V to 10V Range, Code = 0, ±5mA Load
(Note 2)
V+/V= ±5V, VREF = 2V,
0V to 10V Range, Code = 0, ±3mA Load
(Note 2)
l –14.3
l –4.5
l
l
l
l
3
5
8
3.5 4
5.5
9
14.3 –14.3
6
10
14.3 –14.3
14.3
μs
μs
μs
V
4.5 –4.5
4.5 –4.5
4.5
V
±5
±4
±3
±2.7
±0.005
±5
±4
±3
±2.7
±0.01
±5
±4
±3
±2.7
±0.04
mA
mA
mA
mA
LSB/mA
±0.01
±0.013
±0.05 LSB/mA
Output
Impedance
ISC Short-Circuit
Current
VREF = 5V, 0V to 10V Range,
Code = 0, ±5mA Load
V+CC/Vooddee===±01F,u6Vl.l5OSVU,cTValSReEh,FoV=rOteU5dTV,tSo±h1Vo0+rVt(eNdRoattonegV2e)
V+/V= ±5.5V, VREF = 2V, ±10V Range
Code = 0, VOUT Shorted to V+ (Note 2)
Code = Full Scale, VOUT Shorted to V
l
l
l –36
l
l –36
0.015
38
–36
38
–36
0.006
0.006
Ω
38
–36
38
–36
38 mA
mA
38 mA
mA
2704fd
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