Document
Features
nn Precision Reference 10ppm/°C Max nn Independently Programmable Output Ranges:
0V to 5V, 0V to 10V, ±2.5V, ±5V, ±10V nn Full 16-Bit/12-Bit Resolution at All Ranges nn Maximum INL Error: ±4LSB at 16 Bits nn A/B Toggle via Software or Dedicated Pin nn Analog Multiplexer with Auxiliary Inputs nn Guaranteed Monotonic Over Temperature nn Internal or External Reference nn Outputs Drive ±10mA Guaranteed nn 1.8V to 5V SPI Serial interface nn 32-Lead (5mm × 5mm) QFN Package
Applications
nn Optical Networking nn Instrumentation nn Data Acquisition nn Automatic Test Equipment nn Process Control and Industrial Automation
LTC2664
Quad 16-Bit/12-Bit ±10V VOUT SoftSpan DACs with 10ppm/°C Max Reference Description
The LTC®2664 is a family of four-channel, 16-/12-bit ±10V digital-to-analog converters with integrated precision references. They are guaranteed monotonic and have built-in rail-to-rail output buffers. These SoftSpan™ DACs offer five output ranges up to ±10V. The range of each channel is independently programmable, or the part can be hardware-configured for operation in a fixed range.
The integrated 2.5V reference is buffered separately to each channel; an external reference can be used for additional range options. The LTC2664 also includes A/B toggle capability via a dedicated pin or software toggle command.
The SPI/Microwire-compatible 3-wire serial interface operates on logic levels as low as 1.71V at clock rates up to 50MHz.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6891433, 5859606, 5936245, 7671770.
Block Diagram
REFCOMP 26
OVRTMP 30 GND
11, 29 REFLO 10, 27 MUXIN0 2
VOUT0 3
VREF DAC 0
INTERNAL REFERENCE
MUX
MUX
VREF DAC 3
25 REF 28 VCC 24 CLR 7 V+ 8 V– 23 MUXIN3 22 VOUT3
RGSTR B RGSTR A SPAN SPAN REGISTER
SPAN REGISTER SPAN
RGSTR B RGSTR A
RGSTR B RGSTR A SPAN SPAN REGISTER
SPAN REGISTER SPAN
RGSTR B RGSTR A
VREF
VOUT1 4 MUXIN1 5
CS/LD 13 SCK 14 SDI 16 SDO 15
MUXOUT 9
DAC 1
VREF
MUX
MUX
DAC 2
21 VOUT2 20 MUXIN2
CONTROL LOGIC
DECODE
12 LDAC 17 TGP 31 MSP0
32-BIT SHIFT REGISTER
POWER-ON RESET
MONITOR MUX TOGGLE SELECT REGISTER
32 MSP1 1 MSP2 18 IOVCC
2664 BD
INL (LSB)
Integral Nonlinearity (LTC2664-16)
4 ±10V RANGE
3
2
1
0
–1
–2
–3
–4 0
16384
32768 CODE
49152 65535
2664 TA01b
For more information www.linear.com/LTC2664
2664fa
1
LTC2664
Absolute Maximum Ratings
(Notes 1, 2)
Analog Supply Voltage (VCC)........................ –0.3V to 6V Digital I/O Voltage (IOVCC)............................ –0.3V to 6V REFLO........................................................ –0.3V to 0.3V V+............................................................ –0.3V to 16.5V V–.............................................................–16.5V to 0.3V CS/LD, SCK, SDI, LDAC, CLR, TGP............... –0.3V to 6V MSP0, MSP1, MSP2.........–0.3V to Min (VCC + 0.3V, 6V) VOUT0 to VOUT3, MUXIN0 to MUXIN3, MUXOUT................ V– – 0.3V to V+ + 0.3V (Max ±16.5V) REF, REFCOMP.................–0.3V to Min (VCC + 0.3V, 6V) SDO.............................. –0.3V to Min (IOVCC + 0.3V, 6V) OVRTMP........................................................ –0.3V to 6V Operating Temperature Range
LTC2664C................................................. 0°C to 70°C LTC2664I..............................................–40°C to 85°C LTC2664H........................................... –40°C to 125°C Maximum Junction Temperature........................... 150°C Storage Temperature Range................... –65°C to 150°C
Pin Configuration
TOP VIEW
MSP1 MSP0 OVRTMP GND VCC REFLO REFCOMP REF
32 31 30 29 28 27 26 25
MSP2 1
24 CLR
MUXIN0 2
23 MUXIN3
VOUT0 3 VOUT1 4 MUXIN1 5
22 VOUT3
33
21 VOUT2
20 MUXIN2
DNC 6 V+ 7 V– 8
19 DNC 18 IOVCC 17 TGP
9 10 11 12 13 14 15 16
MUXOUT REFLO GND LDAC CS/LD SCK SDO SDI
UH PACKAGE 32-LEAD (5mm × 5mm) PLASTIC QFN
TJMAX = 150°C, θJA = 44°C/W EXPOSED PAD IS V–, MUST BE SOLDERED TO PCB
2664fa
2
For more information www.linear.com/LTC2664
Order Information http://www.linear.com/product/LTC2664#orderinfo
LTC2664 C UH 16 #TR PBF
LEAD FREE DESIGNATOR PBF = Lead Free
TAPE AND REEL TR = 2500-Piece Tape and Reel
RESOLUTION 16 = 16-Bit 12 = 12-Bit
PACKAGE TYPE UH = 32-Lead QFN
TEMPERATURE GRADE C = Commercial Temperature Range (0°C to 70°C) I = Industrial Temperature Range (–40°C to 85°C) H = Automotive Temperature Range (–40°C to 125°C)
PRODUCT PART NUMBER
LTC2664
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/. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
Product Selection Guide
LE.