Analog Devices AD5542, AD5541 Datasheet

a		5 V, Serial-Input
		Voltage-Output, 16-Bit DACs
		AD5541/AD5542

FEATURES

Full 16-Bit Performance

5 V Single Supply Operation Low Power

Short Settling Time

Unbuffered Voltage Output Capable of Driving 60 kV

Loads Directly SPI™/QSPI™/MICROWIRE™-Compatible Interface

Standards

Power-On Reset Clears DAC Output to 0 V (Unipolar Mode)

Schmitt Trigger Inputs for Direct Optocoupler Interface

APPLICATIONS

Digital Gain and Offset Adjustment

Automatic Test Equipment

Data Acquisition Systems

Industrial Process Control

GENERAL DESCRIPTION

The AD5541 and AD5542 are single, 16-bit, serial input, voltage output DACs that operate from a single 5 V ± 10% supply.

The AD5541 and AD5542 utilize a versatile 3-wire interface that is compatible with SPI, QSPI, MICROWIRE, and DSP interface standards.

These DACs provide 16-bit performance without any adjustments. The DAC output is unbuffered, which reduces power consumption and offset errors contributed to by an output buffer.

The AD5542 can be operated in bipolar mode generating a

± VREF output swing. The AD5542 also includes Kelvin sense connections for the reference and analog ground pins to reduce layout sensitivity.

The AD5541 and AD5542 are available in an SO package.

FUNCTIONAL BLOCK DIAGRAMS

VDD

	AD5541
REF	16-BIT DAC	VOUT
		AGND
CS	16-BIT DATA LATCH
DIN	CONTROL
SCLK	LOGIC
	SERIAL INPUT REGISTER
	DGND

VDD

	AD5542	RFB
	RINV	RFB
		INV
REFF
	16-BIT DAC	VOUT
REFS
		AGNDF
CS	16-BIT DATA LATCH
LDAC	CONTROL
		AGNDS
SCLK	LOGIC
DIN	SERIAL INPUT REGISTER
	DGND

PRODUCT HIGHLIGHTS

1.Single Supply Operation.

The AD5541 and AD5542 are fully specified and guaranteed for a single 5 V ± 10% supply.

2.Low Power Consumption.

These parts consume typically 1.5 mW with a 5 V supply.

3.3-Wire Serial Interface.

4.Unbuffered output capable of driving 60 kΩ loads.

This reduces power consumption as there is no internal buffer to drive.

5.Power-On Reset circuitry.

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corporation.

REV. A

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: [phone]	World Wide Web Site: http://www.analog.com
Fax: [phone]	© Analog Devices, Inc., 1999

AD5541/AD5542–SPECIFICATIONS			(VDD = 5 V 6 10%, VREF = 2.5 V, AGND = DGND = 0 V. All specifications
			TA = TMIN to TMAX, unless otherwise noted.)
Parameter	Min Typ	Max		Unit	Test Condition
STATIC PERFORMANCE
Resolution	16			Bits
Relative Accuracy, INL	± 0.5	± 1.0		LSB	L, C Grades
	± 0.5	± 2.0		LSB	B, J Grades
	± 0.5	± 4.0		LSB	A Grade
Differential Nonlinearity	± 0.5	± 1.0		LSB	Guaranteed Monotonic
		± 1.5		LSB	J Grade
Gain Error	–1.5	± 5		LSB	TA = 25°C
		± 7		LSB
Gain Error Temperature Coefficient	± 0.1	± 1		ppm/°C	TA = 25°C
Zero Code Error	0.3			LSB
		± 2		LSB
Zero Code Temperature Coefficient	± 0.05			ppm/°C
AD5542				Ω/Ω	RFB/RINV, Typically RFB = RINV = 28 kΩ
Bipolar Resistor Matching	1.000	± 0.0076
	± 0.0015			%	Ratio Error
Bipolar Zero Offset Error	± 1	± 5		LSB	TA = 25°C
		± 7		LSB
Bipolar Zero Temperature Coefficient	± 0.2			ppm/°C
OUTPUT CHARACTERISTICS
Output Voltage Range	0	VREF – 1 LSB		V	Unipolar Operation
	–VREF	VREF – 1 LSB		V	AD5542 Bipolar Operation
Output Voltage Settling Time	1			µs	to 1/2 LSB of FS, CL = 10 pF
Slew Rate	25			V/µs	CL = 10 pF, Measured from 0% to 63%
Digital-to-Analog Glitch Impulse	10			nV-s	1 LSB Change Around the Major Carry
Digital Feedthrough	10			nV-s	All 1s Loaded to DAC, VREF = 2.5 V
DAC Output Impedance	6.25			kΩ	Tolerance Typically 20%
Power Supply Rejection Ratio		± 1.0		LSB	VDD ± 10%
DAC REFERENCE INPUT
Reference Input Range	2.0	VDD		V
Reference Input Resistance2	9			kΩ	Unipolar Operation
	7.5			kΩ	AD5542, Bipolar Operation
LOGIC INPUTS		± 1		µA
Input Current
VINL, Input Low Voltage		0.8		V
VINH, Input High Voltage	2.4			V
Input Capacitance3		10		pF
Hysteresis Voltage3	0.4			V
REFERENCE
Reference –3 dB Bandwidth	1.3			MHz	All 1s Loaded
Reference Feedthrough	1			mV p-p	All 0s Loaded, VREF = 1 V p-p at 100 kHz
Signal-to-Noise Ratio	92			dB
Reference Input Capacitance	75			pF	Code 0000 Hex
	120			pF	Code FFFF Hex
POWER REQUIREMENTS
VDD	4.50	5.50		V
IDD	0.3	1.1		mA
Power Dissipation	1.5	6.05		mW

NOTES

1Temperature ranges are as follows: A, B, C Versions: –40°C to +85°C. J, L Versions: 0°C to 70°C. 2Reference input resistance is code-dependent, minimum at 8555 hex.

3Guaranteed by design, not subject to production test.

Specifications subject to change without notice.

–2–

REV. A

				AD5541/AD5542
	1, 2	(VDD = 5 V 6 5%, VREF = 2.5 V, AGND = DGND = 0 V. All specifications TA = TMIN to TMAX, unless
TIMING CHARACTERISTICS		otherwise noted.)
	Limit at TMIN, TMAX
Parameter	All Versions		Unit	Description
fSCLK	25		MHz max	SCLK Cycle Frequency
t1	40		ns min	SCLK Cycle Time
t2	20		ns min	SCLK High Time
t3	20		ns min	SCLK Low Time
t4	15		ns min	CS Low to SCLK High Setup
t5	15		ns min	CS High to SCLK High Setup
t6	35		ns min	SCLK High to CS Low Hold Time
t7	20		ns min	SCLK High to CS High Hold Time
t8	15		ns min	Data Setup Time
t9	0		ns min	Data Hold Time
t10	30		ns min	LDAC Pulsewidth
t11	30		ns min	CS High to LDAC Low Setup
t12	30		ns min	CS High Time Between Active Periods

NOTES

1Guaranteed by design. Not production tested.

2Sample tested during initial release and after any redesign or process change that may affect this parameter. All input signals are measured with tr = tf = 5 ns (10% to 90% of VDD) and timed from a voltage level of (VIL + VIH)/2.

Specifications subject to change without notice.

			t1
SCLK
	t6	t2	t3	t5
	t4			t7
CS	t12
	t8	t9
DIN	DB15			DB0

t11

t10

LDAC*

*AD5542 ONLY. MAY BE TIED PERMANENTLY LOW IF REQUIRED.

Figure 1. Timing Diagram

REV. A

–3–

AD5541/AD5542

ABSOLUTE MAXIMUM RATINGS*

(TA = 25°C unless otherwise noted)

VDD to AGND . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V Digital Input Voltage to DGND . . . . . –0.3 V to VDD + 0.3 V

VOUT to AGND . . . . . . . . . . . . . . . . . . –0.3 V to VDD + 0.3 V AGND, AGNDF, AGNDS to DGND . . . . . –0.3 V to +0.3 V

Input Current to Any Pin Except Supplies . . . . . . . . ± 10 mA Operating Temperature Range

Industrial (A, B, C Versions) . . . . . . . . . . . –40°C to +85°C Commercial (J, L Versions) . . . . . . . . . . . . . . . 0°C to 70°C Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

Maximum Junction Temperature, (TJ max)	. . . . . . . . . 150°C
Package Power Dissipation . . . . . . . . . . . . .	(TJ max – TA)/θJA
Thermal Impedance θJA	149.5°C/W
SOIC (SO-8) . . . . . . . . . . . . . . . . . . . . . .
SOIC (R-14) . . . . . . . . . . . . . . . . . . . . . .	. . . . 104.5°C/W
Lead Temperature, Soldering	215°C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . .
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . .	. . . . . . . 220°C

*Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ORDERING GUIDE

Model	INL	DNL	Temperature Range	Package Description	Package Option
AD5541CR	± 1 LSB	± 1 LSB	–40°C to +85°C	8-Lead Small Outline IC	SO-8
AD5541LR	± 1 LSB	± 1 LSB	0°C to 70°C	8-Lead Small Outline IC	SO-8
AD5541BR	± 2 LSB	± 1 LSB	–40°C to +85°C	8-Lead Small Outline IC	SO-8
AD5541JR	± 2 LSB	± 1.5 LSB	0°C to 70°C	8-Lead Small Outline IC	SO-8
AD5541AR	± 4 LSB	± 1 LSB	–40°C to +85°C	8-Lead Small Outline IC	SO-8
AD5542CR	± 1 LSB	± 1 LSB	–40°C to +85°C	14-Lead Small Outline IC	R-14
AD5542LR	± 1 LSB	± 1 LSB	0°C to 70°C	14-Lead Small Outline IC	R-14
AD5542BR	± 2 LSB	± 1 LSB	–40°C to +85°C	14-Lead Small Outline IC	R-14
AD5542JR	± 2 LSB	± 1.5 LSB	0°C to 70°C	14-Lead Small Outline IC	R-14
AD5542AR	± 4 LSB	± 1 LSB	–40°C to +85°C	14-Lead Small Outline IC	R-14

Die Size = 80 × 139 = 11,120 sq mil; Number of Transistors = 1,230.

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD5541/AD5542 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE

–4–

REV. A