LTC1589 Linear Technology Corporation, LTC1589 Datasheet

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LTC1589

Manufacturer Part Number
LTC1589
Description
Ltc1589 - 12-/14-/16-bit Softspan Dacs With Programmable Output Range
Manufacturer
Linear Technology Corporation
Datasheet

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FEATURES
TYPICAL APPLICATIO
APPLICATIO S
5V
Six Programmable Output Ranges
1LSB Max DNL and INL Over the Industrial
Temperature Range
Glitch Impulse < 2nV-s
16-Lead SSOP Package
Power-On Reset to 0V
Asynchronous Clear to 0V for All Ranges
Process Control and Industrial Automation
Precision Instrumentation
Direct Digital Waveform Generation
Software-Controlled Gain Adjustment
Automatic Test Equipment
V
Unipolar Mode: 0V to 5V, 0V to 10V
Bipolar Mode: 5V, 10V, 2.5V, – 2.5V to 7.5V
REF
5V
0.1 F
14
13
12
11
10
9
V
CLR
CS/LD
SCK
SDI
SDO
CC
2
R1
R1
Programmable Output Range 16-Bit SoftSpan DAC
U
1
R
5
6
COM
+
1/2 LT
16-BIT DAC WITH SPAN ADJUST
150pF
R2
®
C2
1469
LTC1592
7
U
R2
16
15
REF
3
R
OFS
with Programmable Output Range
R
4
FB
AGND
I
I
OUT1
OUT2
GND
1588992 TA01
6
7
8
5
12-/14-/16-Bit SoftSpan DACs
2
3
C1
15pF
DESCRIPTIO
+
SoftSpan is a trademark of Linear Technology Corporation.
The LTC
/16-bit multiplying current output DACs that operates
from a single 5V supply. These SoftSpan
software-programmed for either unipolar or bipolar mode
through a 3-wire SPI interface. In either mode, the voltage
output range can also be software-programmed. Two
output ranges in unipolar mode and four output ranges in
bipolar mode are available.
INL and DNL are accurate to 1LSB over the industrial
temperature range in both unipolar and bipolar modes.
True 16-bit 4-quadrant multiplication is achieved with
on-chip four quadrant multiplication resistors. The
LTC1588/LTC1589/LTC1592 are available in a 16-lead
SSOP package.
These devices include an internal deglitcher circuit that
reduces the glitch impulse to less than 2nV-s (typ).
The asynchronous clear pin resets the LTC1588/LTC1589/
LTC1592 to 0V in unipolar or bipolar mode.
1/2 LT1469
, LTC and LT are registered trademarks of Linear Technology Corporation.
–15V
8
4
15V
0.1 F
0.1 F
LTC1588/LTC1589/LTC1592
®
1588/LTC1589/LTC1592 are serial input 12-/14-
1
V
OUT
U
–0.2
–0.4
–0.6
–0.8
–1.0
1.0
0.8
0.6
0.4
0.2
0
0
LTC1592 Integral Nonlinearity
V
ALL OUTPUT RANGES
REF
= 5V
16384
DIGITAL INPUT CODE
32768
TM
DACs can be
49152
1588992fa
1588992 TA02
1
65535

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LTC1589 Summary of contents

Page 1

... SSOP package. These devices include an internal deglitcher circuit that reduces the glitch impulse to less than 2nV-s (typ). The asynchronous clear pin resets the LTC1588/LTC1589/ LTC1592 unipolar or bipolar mode. , LTC and LT are registered trademarks of Linear Technology Corporation. SoftSpan is a trademark of Linear Technology Corporation. ...

Page 2

... OUT1 OUT2 Maximum Junction Temperature .......................... 150 C Operating Temperature Range LTC1588C/LTC1589C/LTC1592C ........... LTC1588I/LTC1589I/LTC1592I ........... – Storage Temperature Range ................. – 150 C Lead Temperature (Soldering, 10 sec).................. 300 C ELECTRICAL CHARACTERISTICS The denotes specifications which apply over the full operating temperature range, otherwise specifications are T ...

Page 3

... CS/LD Low to SCK High 7 t SCK to SDO Propagation Delay 8 t SCK Low to CS/LD Low 9 t Clear Pulse Low Width 10 t CS/LD High to SCK Positive Edge 11 SCK Frequency LTC1588/LTC1589/LTC1592 The denotes specifications which apply over the full operating = 5V 5V MIN MAX CC REF CONDITIONS (Note 6) (Notes 6, 11) 5V, 10V, 2 ...

Page 4

... Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: 1LSB = 0.0015% of full scale = 15.3ppm of full scale (LTC1592). 1LSB = 0.006% of full scale = 61.2ppm of full scale (LTC1589). 1LSB = 0.024% of full scale = 244.8ppm of full scale (LTC1588). Note 3: Using internal feedback resistor. Note 4: Guaranteed by design, not subject to test. ...

Page 5

... DIGITAL INPUT CODE (LTC1592) Integral Nonlinearity (INL) 1.0 0.8 0.6 0.4 0.2 0 – 0.2 – 0.4 – 0.6 – 0.8 –1.0 0 16384 32768 49152 65535 DIGITAL INPUT CODE 1588992 G01 LTC1588/LTC1589/LTC1592 1.0 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 2400 3200 4095 0 1588992 G11 1.0 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 – ...

Page 6

... LTC1588/LTC1589/LTC1592 W U TYPICAL PERFOR A CE CHARACTERISTICS Integral Nonlinearity vs Reference Voltage in Bipolar Mode 1.0 0.8 0.6 0.4 0.2 0 – 0.2 – 0.4 – 0.6 – 0.8 –1.0 –10 – 8 – 6 – 4 – REFERENCE VOLTAGE (V) Differential Nonlinearity vs Reference Voltage in Bipolar Mode 1.0 0.8 0.6 0.4 0.2 0 – 0.2 – 0.4 – 0.6 – 0.8 –1.0 –10 – 8 – 6 – 4 – 2 ...

Page 7

... No Operation Data Word 15) is the last 16 bits shifted into the input shift register SReg that corresponds to the DAC code. LTC1588/LTC1589/LTC1592 SCK (Pin 12): Serial Interface Clock. Data on the SDI pin is shifted into the input shift register on rising edge of SCK. ...

Page 8

... LTC1588/LTC1589/LTC1592 W BLOCK DIAGRA SDI SREG SCK 24-BIT SHIFT REGISTER 8-BIT SHIFT REGISTER SDO CS/ DIAGRA SCK t 9 SDI CS/LD SDO 8 BUF1 BUF2 12-/14-/16-BIT BUFFER 12/14/16 BUFFER DATA WORD BITS Dn 4 BIT COMMAND DECODER WORD ...

Page 9

... The last four bits (LSBs) of this 16-bit data word are don’t cares for the LTC1588. For the LTC1589, the last 2 bits of the 16-bit data word are don’t cares. If daisy-chaining is required or the input needs to be written in two 16-bit wide segments, then the input stream must be 32-bit wide and the first 8 bits loaded are “ ...

Page 10

... LTC1588/LTC1589/LTC1592 U OPERATIO 10 1588992fa ...

Page 11

... Tables 2 and 3 can also be used to determine the effects of op amp parameters on the LTC1589 and the LTC1588. However, the results obtained from Tables 2 and 3 are in 16-bit LSBs. Divide these results by 4 (LTC1589) and 16 (LTC1588) to obtain the correct LSB sizing ...

Page 12

... B1 V REF 16.5k A (V/V) A1 • A2 • VOL1 A VOL1 V (mV) 0 OS2 I (mV (V/V) 0 VOL2 Table 4. Partial List of LTC Precision Amplifiers Recommended for Use with the LTC1588/LTC1589/LTC1592, with Relevant Specifications AMPLIFIER V nA V/mV LT1001 25 2 800 LT1097 50 0.35 1000 LT1112 (Dual) 60 0.25 1500 LT1124 (Dual) ...

Page 13

... LSB level 10V full-scale systems. However, as the circuit band- widths increase, filtering the output of the reference may be required to minimize output noise. Table 5. Partial List of LTC Precision References Recommended for Use with the LTC1588/LTC1589/LTC1592 with Relevant Specifications INITIAL TEMPERATURE REFERENCE ...

Page 14

... BARRIER DIODE 6 – C3** 150pF REF R COM FB OFS R2 12-/14-/16-BIT DAC WITH SPAN ADJUST LTC1588/LTC1589/LTC1592 DAC with Two Optional Circuits OUT from AGND with a Force/Sense Amplifier OUT2 D1 MMBD914 CTX02-16030 IN 3 MMBD914 R10 COLA • • 10k ...

Page 15

... Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. LTC1588/LTC1589/LTC1592 U G Package 16-Lead Plastic SSOP (5.3mm) (Reference LTC DWG # 05-08-1640) 1 ...

Page 16

... R1 R2 ISOLATED SCK 9 ISOLATED SDI 12-/14-/16-BIT DAC WITH SPAN ADJUST CLR 13 CS/LD 12 SCK 11 SDI 10 LTC1588/LTC1589/LTC1592 SDO Figure 4. Optically Isolated 16-Bit SoftSpan System Figure 5. Timing Diagram for the Circuit of Figure 4 www.linear.com 5V REF 12V LT1027-5 0 ...

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