Linear Technology LTC1595BCS8, LTC1595BCN8, LTC1595AIS8, LTC1595AIN8, LTC1596-1CCSW Datasheet

FEATURES

■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 Midscale

■3-Wire SPI and MICROWIRETM Compatible Serial Interface

■Daisy-Chain Serial Output (LTC1596)

■Asynchronous Clear Input LTC1596: Clears to Zero Scale LTC1596-1: Clears to Midscale

APPLICATIOUS

■Process Control and Industrial Automation

■Software Controlled Gain Adjustment

■Digitally Controlled Filter and Power Supplies

■Automatic Test Equipment

LTC1595/LTC1596/LTC1596-1

Serial 16-Bit

Multiplying DACs

DESCRIPTIOU

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 andhardwarecompatiblewiththe12-bitDAC8143/AD7543 and comes in 16-pin PDIP and SO wide packages.

Both are specified over the industrial temperature range. Sensitivity of INL to op amp VOS 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 midscale.

, LTC and LT are registered trademarks of Linear Technology Corporation.

MICROWIRE is a trademark of National Semiconductor Corporation.

TYPICAL APPLICATIOU

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

VIN		5V
		8	1	2			33pF
		VDD	VREF	RFB
	7
CLOCK		CLK
	6					3
DATA		SRI	LTC1595		OUT1		–
LOAD	5	LD					LT®1468	VOUT
				GND
							+
				4
								1595/96 TA01

Integral Nonlinearity

		1.0
	(LSB)	0.8
		0.6
	NONLINEARITY	0.4
		0.2
		0
	INTEGRAL	–0.2
		–0.4
		–0.6

– 0.8 –1.0

0

16384

32768

49152

65535

DIGITAL INPUT CODE

1595/96 TA02

1

LTC1595/LTC1596/LTC1596-1

ABSOLUTE

WAXIWUW

RATINGSU

(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 ................	– 0.5V to (VDD + 0.5V)

VOUT1, VOUT2 to AGND .................	– 0.5V to (VDD + 0.5V)
Maximum Junction Temperature ..........................		150°C
Operating Temperature Range		0°C to 70°C
LTC1595C/LTC1596C/LTC1596-1C
LTC1595I/LTC1596I/LTC1596-1I ......		– 40°C to 85°C
Storage Temperature Range ................		– 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................		300°C

PACKAGE/ORDER IUFORWATIOU

TOP VIEW

TOP VIEW

RFB

VREF

1

8

VDD

OUT1

1

16

VREF

RFB

2

7

CLK

OUT2

2

15

VDD

OUT1

3

6

SRI

AGND

3

14

GND

4

5

LD

STB1

4

13

CLR

N8 PACKAGE

S8 PACKAGE

LD1

5

12

DGND

8-LEAD PDIP

8-LEAD PLASTIC SO

SRO

6

11

STB4

TJMAX = 150°C, θJA = 130°C/W (N)

SRI

7

10

STB3

TJMAX = 150°C, θJA = 190°C/W (S)

STB2

8

9

LD2

ORDER PART NUMBER

N PACKAGE

SW PACKAGE

16-LEAD PDIP

16-LEAD PLASTIC SO WIDE

T

= 150°C, θ

= 100°C/W (N)

LTC1595ACN8

LTC1595AIN8

JMAX

°

θJA

°

LTC1595ACS8

LTC1595AIS8

TJMAX = 150 C,

JA = 130 C/W (SW)

LTC1595BCN8

LTC1595BIN8

ORDER PART NUMBER

LTC1595BCS8

LTC1595BIS8

LTC1595CCN8

LTC1595CIN8

LTC1596ACN

LTC1596AIN

LTC1596-1ACN

LTC1596-1AIN

LTC1595CCS8

LTC1595CIS8

LTC1596ACSW

LTC1596AISW

LTC1596-1ACSW

LTC1596-1AISW

LTC1596BCN

LTC1596BIN

LTC1596-1BCN

LTC1596-1BIN

S8 PART MARKING

LTC1596BCSW

LTC1596BISW

LTC1596-1BCSW

LTC1596-1BISW

1595A

1595AI

LTC1596CCN

LTC1596CIN

LTC1596-1CCN

LTC1596-1CIN

1595B

1595BI

LTC1596CCSW

LTC1596CISW

LTC1596-1CCSW

LTC1596-1CISW

1595C

1595CI

Consult factory for Military grade parts.

ELECTRICAL CHARACTERISTICS

VDD = 5V ±10%, VREF = 10V, VOUT1 = VOUT2 = AGND = 0V, TA = TMIN to TMAX, unless otherwise noted.

					LTC1595A/96A/96-1A		LTC1595B/96B/96-1B	LTC1595C/96C/96-1C
SYMBOL		PARAMETER	CONDITIONS		MIN TYP	MAX	MIN TYP MAX	MIN TYP MAX	UNITS
Accuracy
		Resolution		●	16		16	16	Bits
		Monotonicity		●	16		16	15	Bits
INL		Integral Nonlinearity	(Note 2) TA = 25°C		±0.25	± 1	±2	±4	LSB
			TMIN to TMAX	●	±0.35	±1	±2	±4	LSB

2

LTC1595/LTC1596/LTC1596-1

ELECTRICAL CHARACTERISTICS

VDD = 5V ±10%, VREF = 10V, VOUT1 = VOUT2 = AGND = 0V, TA = TMIN to TMAX, unless otherwise noted.

LTC1595A/96A/96-1A

LTC1595B/96B/96-1B

LTC1595C/96C/96-1C

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP MAX

UNITS

DNL

Differential

TA = 25°C

±0.2

± 1

±1

±2

LSB

Nonlinearity

TMIN to TMAX

●

±0.2

±1

±1

±2

LSB

GE

Gain Error

(Note 3)

TA = 25°C

2

±16

±16

±32

LSB

TMIN to TMAX

●

3

±16

±32

±32

LSB

VDD = 5V ±10%, VREF = 10V, VOUT1 = VOUT2 = AGND = 0V, TA = TMIN to TMAX, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Gain Temperature Coefficient

(Note 4) DGain/DTemperature

●

1

2

ppm/°C

ILEAKAGE

OUT1 Leakage Current

(Note 5) TA = 25°C

±3

nA

TMIN to TMAX

●

±15

nA

Zero-Scale Error

TA = 25°C

±0.2

LSB

TMIN to TMAX

●

±1

LSB

PSRR

Power Supply Rejection

VDD = 5V ±10%

●

±1

±2

LSB/V

Reference Input

RREF

VREF Input Resistance

(Note 6)

●

5

7

10

kW

AC Performance

Output Current Settling Time

(Notes 7, 8)

1

ms

Mid-Scale Glitch Impulse

Using LT1122 Op Amp, CFEEDBACK = 33pF

1

nV-s

Digital-to-Analog Glitch Impulse

Full-Scale Transition, VREF = 0V,

2

nV-s

Using LT1122 Op Amp, CFEEDBACK = 33pF

Multiplying Feedthrough Error

VREF = ±10V, 10kHz Sine Wave

1

mVP-P

THD

Total Harmonic Distortion

(Note 9)

108

dB

Equivalent DAC Thermal Noise

(Note 10) f = 1kHz

11

nV/Ö

Hz

Voltage Density

Analog Outputs (Note 4)

COUT

Output Capacitance (Note 4)

DAC Register Loaded to All 1s

COUT1

●

115

130

pF

DAC Register Loaded to All 0s

70

80

pF

COUT1

●

Digital Inputs

VIH

Digital Input High Voltage

●

2.4

V

VIL

Digital Input Low Voltage

●

0.8

V

IIN

Digital Input Current

●

0.001

±1

mA

CIN

Digital Input Capacitance

(Note 4) VIN = 0V

●

8

pF

Digital

Outputs: SRO (LTC1596/LTC1596-1)

VOH

Digital Output High Voltage

IOH = 200mA

●

4

V

VOL

Digital Output Low Voltage

IOL = 1.6mA

●

0.4

V

VDD = 5V ±10%, VREF = 10V, VOUT1 = GND = 0V, TA = TMIN to TMAX, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Timing

Characteristics (LTC1595)

tDS

Serial Input to CLK Setup Time

●

30

5

ns

tDH

Serial Input to CLK Hold Time

●

30

5

ns

3

LTC1595/LTC1596/LTC1596-1

ELECTRICAL CHARACTERISTICS

SYMBOL	PARAMETER	CONDITIONS		MIN	TYP	MAX	UNITS
tSRI	Serial Input Data Pulse Width		●	60			ns
tCH	Clock Pulse Width High		●	60			ns
tCL	Clock Pulse Width Low		●	60			ns
tLD	Load Pulse Width		●	60			ns
tASB	LSB Clocked into Input Register		●	0			ns
	to DAC Register Load Time

VDD = 5V ±10%, VREF = 10V, VOUT1 = VOUT2 = AGND = 0V, TA = TMIN to TMAX, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Timing

Characteristics (LTC1596/LTC1596-1)

tDS1

Serial Input to Strobe Setup Time

STB1 Used as the Strobe

●

30

5

ns

tDS2

STB2 Used as the Strobe

●

20

– 5

ns

tDS3

Used as the Strobe

25

0

ns

STB3

●

tDS4

STB4 Used as the Strobe

●

20

– 5

ns

tDH1

Serial Input to Strobe Hold Time

STB1 Used as the Strobe

●

30

5

ns

tDH2

STB2 Used as the Strobe

●

40

15

ns

tDH3

Used as the Strobe

35

10

ns

STB3

●

tDH4

STB4 Used as the Strobe

●

40

15

ns

tSRI

Serial Input Data Pulse Width

●

60

ns

tSTB1 to

Strobe Pulse Width

(Note 11)

●

60

ns

tSTB4

t

to

Pulse Width

(Note 12)

60

ns

Strobe

●

STB1

t

STB4

t

t

Pulse Width

60

ns

LD

●

LD1,

LD2

tASB

LSB Strobed into Input Register

●

0

ns

to Load DAC Register Time

tCLR

Clear Pulse Width

●

100

ns

tPD1

STB1 to SRO Propagation Delay

CL = 50pF

●

30

150

ns

tPD

STB2,

STB4 to SRO

CL = 50pF

30

200

ns

STB3,

●

Propagation Delay

Power Supply

VDD

Supply Voltage

●

4.5

5

5.5

V

IDD

Supply Current

Digital Inputs = 0V or VDD

●

1.5

10

mA

The ● denotes specifications which apply over the full operating temperature range.

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. Note 3: Using internal feedback resistor.

Note 4: Guaranteed by design, not subject to test. Note 5: IOUT1 with DAC register loaded with all 0s. Note 6: Typical temperature coefficient is 100ppm/C. Note 7: OUT1 load = 100W in parallel with 13pF.

Note 8: To 0.0015% for a full-scale change, measured from the falling edge of LD1, LD2 or LD.

Note 9: VREF = 6VRMS at 1kHz. DAC register loaded with all 1s; op amp = LT1007.

Note 10: Calculation from en = Ö4kTRB where: k = Boltzmann constant (J/°K); R = resistance (W); T = temperature (°K); B = bandwidth (Hz). Note 11: Minimum high time for STB1, STB2, STB4. Minimum low time for STB3.

Note 12: Minimum low time for STB1, STB2, STB4. Minimum high time for STB3.

4