Datasheet

ManualsBrandsLINEAR TECHNOLOGY ManualsData collecting ICsData acquisition IC - DA converter (DAC) SOIC 16

LTC1595/LTC1596/LTC1596-1

159561fb

Typical applicaTion

FeaTures DescripTion

Serial 16-Bit

Multiplying DACs

The LTC

1595/LTC1596/LTC1596-1 are serial input, 16-bit

multiplying current output DACs. The LTC1595 is pin and

hardware compatible with the 12-bit DAC8043 and comes

in 8-pin PDIP and SO packages. The LTC1596 is pin and

hardware compatible with the 12-bit DAC8143/AD7543

and comes in the 16-pin SO wide package.

Both are specified over the industrial temperature range.

Sensitivity of INL to op amp V

is reduced by five times

compared to the industry standard 12-bit DACs, so most

systems can be easily upgraded to true 16-bit resolution

and linearity without requiring more precise op amps.

These DACs include an internal deglitching circuit that

reduces the glitch impulse by more than ten times to less

than 1nV-s typ.

The DACs have a clear input and a power-on reset. The

LTC1595 and LTC1596 reset to zero-scale. The LTC1596-1

is a version of the LTC1596 that resets to mid-scale.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

applicaTions

SO-8 Package (LTC1595)

DNL and INL: 1LSB Max

Low Glitch Impulse: 1nV-s Typ

Fast Settling to 1LSB: 2µs (with LT1468)

Pin Compatible with Industry Standard

12-Bit DACs: DAC8043 and DAC8143/AD7543

4-Quadrant Multiplication

Low Supply Current: 10µA Max

Power-On Reset

LTC1595/LTC1596: Resets to Zero-Scale

LTC1596-1: Resets to Mid-Scale

3-Wire SPI and MICROWIRE Compatible

Serial Interface

Daisy-Chain Serial Output (LTC1596)

Asynchronous Clear Input

LTC1596: Clears to Zero-Scale

LTC1596-1: Clears to Mid-Scale

Process Control and Industrial Automation

Software Controlled Gain Adjustment

Digitally Controlled Filter and Power Supplies

Automatic Test Equipment

Integral Nonlinearity

SO-8 Multiplying 16-Bit DAC Has Easy 3-Wire Serial Interface

REF

LTC1595

GND

CLOCK

DATA

LOAD

CLK

SRI

OUT1

33pF

OUT

1595/96 TA01

–

1468

DIGITAL INPUT CODE

–1.0

INTEGRAL NONLINEARITY (LSB)

–0.6

–0.8

–0.4

0.4

0.6

0.8

1.0

–0.2

0.2

16384 32768

1595/96 TA02

49152 65535

Summary of content (16 pages)

PAGE 1
LTC1595/LTC1596/LTC1596-1 Serial 16-Bit Multiplying DACs Features n n n n n n n n n n n Description SO-8 Package (LTC1595) DNL and INL: 1LSB Max Low Glitch Impulse: 1nV-s Typ Fast Settling to 1LSB: 2µs (with LT1468) Pin Compatible with Industry Standard 12-Bit DACs: DAC8043 and DAC8143/AD7543 4-Quadrant Multiplication Low Supply Current: 10µA Max Power-On Reset LTC1595/LTC1596: Resets to Zero-Scale LTC1596-1: Resets to Mid-Scale 3-Wire SPI and MICROWIRE Compatible Serial Interface Daisy-Chain Serial Ou
PAGE 2
LTC1595/LTC1596/LTC1596-1 Absolute Maximum Ratings (Note 1) VDD to AGND................................................ –0.5V to 7V VDD to DGND............................................... –0.5V to 7V AGND to DGND ............................................ VDD + 0.5V DGND to AGND .............................................VDD + 0.5V VREF to AGND, DGND...............................................±25V RFB to AGND, DGND.................................................±25V Digital Inputs to DGND ......
PAGE 3
LTC1595/LTC1596/LTC1596-1 Order Information LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1595ACN8#PBF LTC1595ACN8#TRPBF LTC1595ACN8 8-Lead PDIP 0°C to 70°C LTC1595ACS8#PBF LTC1595ACS8#TRPBF 1595A 8-Lead Plastic SO 0°C to 70°C LTC1595BCN8#PBF LTC1595BCN8#TRPBF LTC1595BCN8 8-Lead PDIP 0°C to 70°C LTC1595BCS8#PBF LTC1595BCS8#TRPBF 1595B 8-Lead Plastic SO 0°C to 70°C LTC1595CCN8#PBF LTC1595CCN8#TRPBF LTC1595CCN8 8-Lead PDIP 0°C to 70°C LTC15
PAGE 4
LTC1595/LTC1596/LTC1596-1 Electrical Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VDD = 5V ±10%, VREF = 10V, VOUT1 = VOUT2 = AGND = 0V, TA = TMIN to TMAX, unless otherwise noted.
PAGE 5
LTC1595/LTC1596/LTC1596-1 Electrical Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VDD = 5V ±10%, VREF = 10V, VOUT1 = GND = 0V, TA = TMIN to TMAX, unless otherwise noted.
PAGE 6
LTC1595/LTC1596/LTC1596-1 Typical Performance Characteristics Mid-Scale Glitch Impulse 0 LD FALLING EDGE –10 Differential Nonlinearity (INL) 1.0 0.8 0.8 DIFFERENTIAL NONLINEARITY (LSB) INTEGRAL NONLINEARITY (LSB) 1nV-s TYP USING LT1122 OP AMP CFEEDBACK = 33pF VREF = 10V +10 OUTPUT VOLTAGE (mV) Integral Nonlinearity (INL) 1.0 0.6 0.4 0.2 0 – 0.2 – 0.4 – 0.6 – 0.8 0 1 2 TIME (s) 3 –1.0 4 16384 49152 32768 DIGITAL INPUT CODE 0 1595/96 G01 0.2 0 – 0.2 – 0.4 – 0.6 – 0.8 –1.0 65535 1.
PAGE 7
LTC1595/LTC1596/LTC1596-1 Typical Performance Characteristics Supply Current vs Logic Input Voltage 1.0 Logic Threshold vs Supply Voltage 3.0 VDD = 5V 0.9 2.5 LOGIC THRESHOLD (V) SUPPLY CURRENT (mA) 0.8 0.7 0.6 0.5 0.4 0.3 0.2 2.0 1.5 1.0 0.5 0.1 0 0 1 3 2 INPUT VOLTAGE (V) 4 5 0 0 1 2 3 4 5 6 7 8 SUPPLY VOLTAGE (V) 9 10 1595/96 G11 1595/96 G10 Pin Functions LTC1595 VREF (Pin 1): Reference Input. RFB (Pin 2): Feedback Resistor.
PAGE 8
LTC1595/LTC1596/LTC1596-1 Truth Tables Table 2. LTC1596/LTC1596-1 DAC Register Table 1.
PAGE 9
LTC1595/LTC1596/LTC1596-1 Block Diagram (LTC1596/LTC1596-1) 56k VREF 15 56k 56k 56k 56k 56k 56k 56k 56k 112k 16 RFB 112k 112k 112k 7k 1 OUT1 2 OUT2 VDD 14 3 AGND DECODER CLR 13 CLR LD1 5 LOAD LD2 9 D14 D15 (MSB) D12 D13 D11 ••• DAC REGISTER D0 (LSB) CLR STB1 4 IN INPUT 16-BIT SHIFT REGISTER CLK STB2 8 7 SRI OUT STB3 10 1596 BD STB4 11 6 SRO DGND 12 Timing Diagram (LTC1596/LTC1596-1) t DS1 t DS2 t DS3 t DS4 t DH1 t DH2 t DH3 t DH4 STROBE INPUT STB1, STB2, STB4 (
PAGE 10
LTC1595/LTC1596/LTC1596-1 Applications Information Description The 16-pin LTC1596 can operate in identical fashion to the LTC1595 but offers additional pins for flexibility. Four clock pins are available STB1, STB2, STB3 and STB4. STB1, STB2 and STB4 operate like the CLK pin of the LTC1595, capturing data on their rising edges. STB3 captures data on its falling edge (see Truth Table 1). The LTC1595/LTC1596 are 16-bit multiplying DACs which have serial inputs and current outputs.
PAGE 11
LTC1595/LTC1596/LTC1596-1 Applications Information Bipolar (4-Quadrant Multiplying) Mode (VOUT = – VREF to VREF) The LTC1595/LTC1596 can be used with a dual op amp and three external resistors to provide 4-quadrant multiplying operation as shown in Figure 2 (last page). With a fixed 10V reference, the circuits shown give a precision bipolar –10V to 10V output swing. Using the LTC1596-1 will cause the power-on reset and clear pin to reset the DAC to mid-scale (bipolar zero).
PAGE 12
LTC1595/LTC1596/LTC1596-1 Package Description Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. N8 Package N Package 8-Lead PDIP (Narrow .300 Inch) 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510 Rev I) (Reference LTC DWG # 05-08-1510 Rev I) .400* (10.160) MAX 8 7 6 5 1 2 3 4 .255 ± .015* (6.477 ± 0.381) .300 – .325 (7.620 – 8.255) .008 – .015 (0.203 – 0.381) ( +.035 .325 –.015 8.255 +0.889 –0.381 ) .045 – .065 (1.143 – 1.
PAGE 13
LTC1595/LTC1596/LTC1596-1 Package Description Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .050 BSC .189 – .197 (4.801 – 5.004) NOTE 3 .045 .005 8 .245 MIN .160 .005 .030 .005 TYP .010 – .020 ¥ 45∞ (0.254 – 0.508) .008 – .010 (0.203 – 0.254) NOTE: 1. DIMENSIONS IN 5 .150 – .157 (3.810 – 3.988) NOTE 3 .053 – .069 (1.346 – 1.752) 0– 8 TYP .016 – .
PAGE 14
LTC1595/LTC1596/LTC1596-1 Package Description Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. SW Package 16-Lead Plastic Small Outline (Wide .300 Inch) (Reference LTC DWG # 05-08-1620) .050 BSC .045 .005 .030 .005 TYP .398 – .413 (10.109 – 10.490) NOTE 4 16 N 15 14 13 12 11 10 9 N .325 .005 .420 MIN .394 – .419 (10.007 – 10.643) NOTE 3 1 2 3 N/2 N/2 RECOMMENDED SOLDER PAD LAYOUT 1 .005 (0.127) RAD MIN .009 – .013 (0.229 – 0.
PAGE 15
LTC1595/LTC1596/LTC1596-1 Revision History REV DATE DESCRIPTION B 02/12 Removed 16-Lead PDIP (Revision history begins at Rev B) PAGE NUMBER 1, 2 159561fb 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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
PAGE 16
LTC1595/LTC1596/LTC1596-1 Typical Application R2 20k VREF –10V TO 10V R3 20k 5V 0.1µF 10 4 7 5 6 9 8 11 µP 13 14 15 16 33pF STB3 CLR VDD VREF RFB STB1 SRI LD1 LTC1596-1 SRO LD2 STB2 STB4 DGND AGND OUT1 – 1 R1 10k 1/2 LT1112 OUT2 + (20k 2) 1/2 LT1112 + 2 3 12 – TO NEXT DAC FOR DAISY-CHAINING 1595/96 F02a VOUT –VREF TO VREF RESISTORS: CADDOCK T914-20K-010-02 (OR EQUIVALENT) 20k, 0.01%, TC TRACK = 2ppm/°C (a) VREF –10V TO 10V 5V 0.