Datasheet

ManualsBrandsLINEAR TECHNOLOGY ManualsData collecting ICsData acquisition IC - DA converter (DAC) SSOP 28

LTC1591/LTC1597

15917fa

14-Bit and 16-Bit Parallel

Low Glitch Multiplying DACs

with 4-Quadrant Resistors

The LTC

1591/LTC1597 are pin compatible, parallel input

14-bit and 16-bit multiplying current output DACs that oper-

ate from a single 5V supply. INL and DNL are accurate to 1LSB

over the industrial temperature range in both 2- and 4-

quadrant multiplying modes. True 16-bit 4-quadrant multi-

plication is achieved with on-chip 4-quadrant multiplication

resistors.

These DACs include an internal deglitcher circuit that reduces

the glitch impulse to less than 2nV-s (typ). The asynchronous

CLR pin resets the LTC1591/LTC1597 to zero scale and

LTC1591-1/LTC1597-1 to midscale.

The LTC1591/LTC1597 are available in 28-pin SSOP and

PDIP packages and are specified over the industrial tempera-

ture range.

For serial interface 16-bit current output DACs refer to the

LTC1595/LTC1596 data sheet.

■

Process Control and Industrial Automation

■

Direct Digital Waveform Generation

■

Software-Controlled Gain Adjustment

■

Automatic Test Equipment

■

True 16-Bit Performance Over Industrial

Temperature Range

■

DNL and INL: 1LSB Max

■

On-Chip 4-Quadrant Resistors Allow Precise 0V to

10V, 0V to – 10V or

10V Outputs

■

Pin Compatible 14- and 16-Bit Parts

■

Asynchronous Clear Pin

LTC1591/LTC1597: Reset to Zero Scale

LTC1591-1/LTC1597-1: Reset to Midscale

■

Glitch Impulse < 2nV-s

■

28-Lead SSOP Package

■

Low Power Consumption: 10μW Typ

■

Power-On Reset

LTC1591/LTC1591-1 Integral Nonlinearity

LTC1597/LTC1597-1 Integral Nonlinearity

DIGITAL INPUT CODE

INTEGRAL NONLINEARITY (LSB)

1.0

0.8

0.6

0.4

0.2

–0.2

–0.4

–0.6

–0.8

–1.0

16384

32768

1591/97 TA03

49152

65535

REF

= 10V

OUT

= ±10V BIPOLAR

DIGITAL INPUT CODE

INTEGRAL NONLINEARITY (LSB)

1.0

0.8

0.6

0.4

0.2

–0.2

–0.4

–0.6

–0.8

–1.0

4096

8192

1591/97 TA02

12288

16383

REF

= 10V

OUT

= ±10V BIPOLAR

16-Bit, 4-Quadrant Multiplying DAC with a

Minimum of External Components

TYPICAL APPLICATIO

APPLICATIO S

DESCRIPTIO

FEATURES

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

All other trademarks are the property of their respective owners.

LTC1597-1

OFS

15pF

COM

REF

0.1μF

OUT1

15pF

OUT

–V

REF

TO V

REF

1591/97 TA01

AGND

DGND

–

1468

10 TO 21,

24 TO 27

CLR

REF

–

LT1468

16-BIT DAC

DATA

INPUTS

Summary of content (20 pages)

PAGE 1
LTC1591/LTC1597 14-Bit and 16-Bit Parallel Low Glitch Multiplying DACs with 4-Quadrant Resistors DESCRIPTIO U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ True 16-Bit Performance Over Industrial Temperature Range DNL and INL: 1LSB Max On-Chip 4-Quadrant Resistors Allow Precise 0V to 10V, 0V to – 10V or ±10V Outputs Pin Compatible 14- and 16-Bit Parts Asynchronous Clear Pin LTC1591/LTC1597: Reset to Zero Scale LTC1591-1/LTC1597-1: Reset to Midscale Glitch Impulse < 2nV-s 28-Lead SSOP Package Low Power Consumption: 10μW Typ
PAGE 2
LTC1591/LTC1597 U W W W ABSOLUTE MAXIMUM RATINGS (Note 1) VCC to AGND ............................................... – 0.5V to 7V VCC to DGND .............................................. – 0.5V to 7V AGND to DGND ............................................. VCC + 0.5V DGND to AGND ............................................. VCC + 0.5V REF, ROFS, RFB, R1, RCOM to AGND, DGND .......... ±25V Digital Inputs to DGND ............... – 0.5V to (VCC + 0.5V) IOUT1 to AGND ............................ – 0.
PAGE 3
LTC1591/LTC1597 ELECTRICAL CHARACTERISTICS VCC = 5V ±10%, VREF = 10V, IOUT1 = AGND = DGND = 0V, TA = TMIN to TMAX, unless otherwise noted. SYMBOL PARAMETER LTC1591/-1 LTC1597B/-1B MIN TYP MAX MIN TYP MAX CONDITIONS LTC1597A/-1A MIN TYP MAX UNITS Accuracy INL DNL GE Resolution ● 14 16 16 Bits Monotonicity ● 14 16 16 Bits Integral Nonlinearity (Note 2) TA = 25°C TMIN to TMAX ● ±1 ±1 ±2 ±2 ±0.25 ±0.35 ±1 ±1 LSB LSB TA = 25°C TMIN to TMAX ● ±1 ±1 ±1 ±1 ±0.2 ±0.
PAGE 4
LTC1591/LTC1597 ELECTRICAL CHARACTERISTICS The ● denotes specifications that apply over the full operating temperature range. VCC = 5V ±10%, VREF = 10V, IOUT1 = AGND = DGND = 0V, TA = TMIN to TMAX, unless otherwise noted.
PAGE 5
LTC1591/LTC1597 U W TYPICAL PERFOR A CE CHARACTERISTICS (LTC1591/LTC1597) Midscale Glitch Impulse 40 Full-Scale Settling Waveform – 40 SIGNAL/(NOISE + DISTORTION) (dB) USING AN LT1468 CFEEDBACK = 30pF VREF = 10V 30 LD PULSE 5V/DIV 20 10 0 GATED SETTLING WAVEFORM 500μV/DIV 1nV-s TYPICAL –10 –20 0.2 0.4 0.8 0.6 TIME (μs) 1.
PAGE 6
LTC1591/LTC1597 U W TYPICAL PERFOR A CE CHARACTERISTICS (LTC1591) Differential Nonlinearity (DNL) 1.0 1.0 0.8 0.8 0.8 0.6 0.4 0.2 0 – 0.2 – 0.4 – 0.6 – 0.8 –1.0 INTEGRAL NONLINEARITY (LSB) 1.0 DIFFERENTIAL NONLINEARITY (LSB) INTEGRAL NONLINEARITY (LSB) Integral Nonlinearity (INL) 0.6 0.4 0.2 0 – 0.2 – 0.4 – 0.6 – 0.8 12280 8192 4096 DIGITAL INPUT CODE 0 16383 12280 8192 4096 DIGITAL INPUT CODE 0.4 0.2 0 – 0.2 – 0.4 – 0.6 –1.
PAGE 7
LTC1591/LTC1597 U W TYPICAL PERFOR A CE CHARACTERISTICS (LTC1591) Differential Nonlinearity vs Supply Voltage in Bipolar Mode Unipolar Multiplying Mode Frequency Response vs Digital Code 0 ALL BITS ON D13 ON D12 ON D11 ON D10 ON D9 ON D8 ON D7 ON D6 ON D5 ON D4 ON D3 ON D2 ON D1 ON D0 ON 0.8 – 20 0.6 0.4 0.2 ATTENUATION (dB) DIFFERENTIAL NONLINEARITY (LSB) 1.0 VREF = 10V VREF = 2.5V 0 VREF = 10V VREF = 2.5V – 0.2 – 0.4 – 0.6 – 40 – 60 – 80 – 100 – 0.8 ALL BITS OFF –1.
PAGE 8
LTC1591/LTC1597 U W TYPICAL PERFOR A CE CHARACTERISTICS (LTC1597) Differential Nonlinearity (DNL) 1.0 1.0 0.8 0.8 0.8 0.6 0.4 0.2 0 – 0.2 – 0.4 – 0.6 – 0.8 INTEGRAL NONLINEARITY (LSB) 1.0 DIFFERENTIAL NONLINEARITY (LSB) 0.6 0.4 0.2 0 – 0.2 – 0.4 – 0.6 – 0.8 –1.0 0 49152 32768 16384 DIGITAL INPUT CODE 0 65535 49152 32768 16384 DIGITAL INPUT CODE 1597 G01 0.4 0.2 0 – 0.2 – 0.4 – 0.6 –1.0 –10 – 8 – 6 – 4 – 2 0 2 4 6 REFERENCE VOLTAGE (V) 65535 1597 G02 0.8 0.8 0.2 0 – 0.2 – 0.4 – 0.6 – 0.
PAGE 9
LTC1591/LTC1597 U W TYPICAL PERFOR A CE CHARACTERISTICS (LTC1597) Unipolar Multiplying Mode Frequency Response vs Digital Code Differential Nonlinearity vs Supply Voltage in Bipolar Mode 0 ALL BITS ON D15 ON D14 ON D13 ON D12 ON D11 ON D10 ON D9 ON D8 ON D7 ON D6 ON D5 ON D4 ON D3 ON D2 ON D1 ON D0 ON 0.8 – 20 0.6 0.4 0.2 ATTENUATION (dB) DIFFERENTIAL NONLINEARITY (LSB) 1.0 VREF = 10V 0 VREF = 2.5V – 0.2 VREF = 10V VREF = 2.5V – 0.4 – 0.6 – 40 – 60 – 80 – 100 – 0.8 ALL BITS OFF –1.
PAGE 10
LTC1591/LTC1597 U U U PIN FUNCTIONS LTC1591 REF (Pin 1): Reference Input and 4-Quadrant Resistor R2. Typically ±10V, accepts up to ±25V. In 2-Quadrant mode this is the reference input. In 4-quadrant mode, this pin is driven by external inverting reference amplifier. RCOM (Pin 2): Center Tap Point of the Two 4-Quadrant Resistors R1 and R2. Normally tied to the inverting input of an external amplifier in 4-quadrant operation, otherwise shorted to the REF pin. See Figures 1a and 2a.
PAGE 11
LTC1591/LTC1597 TRUTH TABLE Table 1 CONTROL INPUTS CLR WR LD REGISTER OPERATION 0 X X Reset Input and DAC Register to All 0s for LTC1591/LTC1597 and Midscale for LTC1591-1/LTC1597-1 (Asynchronous Operation) 1 0 0 Load Input Register with All 14/16 Data Bits 1 1 1 Load DAC Register with the Contents of the Input Register 1 0 1 1 Input and DAC Register Are Transparent CLK = LD and WR Tied Together.
PAGE 12
LTC1591/LTC1597 W BLOCK DIAGRA SM LTC1597 48k REF 48k 5 RFB 1 12k 48k RCOM 2 48k 48k 48k 48k 48k 96k 48k 96k 96k 96k 12k 12k 4 ROFS 12k R1 3 6 IOUT1 VCC 23 7 AGND DECODER LOAD LD 8 WR 9 22 DGND D15 (MSB) D14 D12 D13 D11 ••• DAC REGISTER D0 (LSB) RST INPUT REGISTER WR 28 CLR RST 1597 BD 10 11 D15 D14 •••• 21 24 25 26 27 D4 D3 D2 D1 D0 WU W TI I G DIAGRA tWR WR DATA tDS tDH tLWD LD tLD tCLR CLR 1591/97TD 15917fa 12
PAGE 13
LTC1591/LTC1597 U U W U APPLICATIONS INFORMATION Description Digital Section The LTC1591/LTC1597 are 14-/16-bit multiplying, current output DACs with a full parallel 14-/16-bit digital interface. The devices operate from a single 5V supply and provide both unipolar 0V to – 10V or 0V to 10V and bipolar ±10V output ranges from a 10V or –10V reference input. They have three additional precision resistors on chip for bipolar operation. Refer to the block diagrams regarding the following description.
PAGE 14
LTC1591/LTC1597 U U W U APPLICATIONS INFORMATION 5V 0.
PAGE 15
LTC1591/LTC1597 U U W U APPLICATIONS INFORMATION VREF + 5V 0.
PAGE 16
LTC1591/LTC1597 U TYPICAL APPLICATIONS Noninverting Unipolar Operation (2-Quadrant Multiplication) VOUT = 0V to VREF + 5V 0.
PAGE 17
LTC1591/LTC1597 U TYPICAL APPLICATIONS 16-Bit VOUT DAC Programmable Unipolar/Bipolar Configuration 16 15 14 LTC203AC UNIPOLAR/ BIPOLAR 1 2 3 + 15V 2 – LT1468 LT1236A-10 4 6 + 5V 0.
PAGE 18
LTC1591/LTC1597 U TYPICAL APPLICATIONS Digital Waveform Generator 15V 2 LT1236A-10 4 6 + 5V LT1001 0.
PAGE 19
LTC1591/LTC1597 U PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted. G Package 28-Lead Plastic SSOP (0.209) (LTC DWG # 05-08-1640) 0.397 – 0.407* (10.07 – 10.33) 28 27 26 25 24 23 22 21 20 19 18 17 16 15 0.301 – 0.311 (7.65 – 7.90) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 0.205 – 0.212** (5.20 – 5.38) 0.068 – 0.078 (1.73 – 1.99) 0° – 8° 0.0256 (0.65) BSC 0.022 – 0.037 (0.55 – 0.95) 0.005 – 0.009 (0.13 – 0.22) *DIMENSIONS DO NOT INCLUDE MOLD FLASH.
PAGE 20
LTC1591/LTC1597 U TYPICAL APPLICATION 17-Bit Sign Magnitude DAC with Bipolar Zero Error of 140μV (0.92LSB at 17 Bits) at 25°C 16 15 14 LTC203AC 15V 2 1 LT1236A-10 4 2 3 6 + 5V 0.