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2.5 V to 5.5 V, 250 A, 2-Wire Interface Dual-Voltage Output, 8-/10-/12-Bit DACs AD5337/AD5338/AD5339
FEATURES
AD5337 2 buffered 8-bit DACs in 8-lead MSOP AD5338, AD5338-1 2 buffered 10-bit DACs in 8-lead MSOP AD5339 2 buffered 12-bit DACs in 8-lead MSOP Low power operation: 250 mA @ 3 V, 300 mA @ 5 V 2-wire (I2C(R)compatible) serial interface 2.5 V to 5.5 V power supply Guaranteed monotonic by design over all codes Power-down to 80 nA @ 3 V, 200 nA @ 5 V 3 power-down modes Double-buffered input logic Output range: 0 V to VREF Power-on reset to 0 V Simultaneous update of outputs (LDAC function) Software clear facility Data readback facility On-chip rail-to-rail output buffer amplifiers Temperature range -40C to +105C
GENERAL DESCRIPTION
AD5337/AD5338/AD5339 are dual 8-, 10-, and 12-bit buffered voltage output DACs in an 8-lead MSOP package, which operate from a single 2.5 V to 5.5 V supply, consuming 250 A at 3 V. On-chip output amplifiers allow rail-to-rail output swing with a slew rate of 0.7 V/s. A 2-wire serial interface operates at clock rates up to 400 kHz. This interface is SMBus-compatible at VDD < 3.6 V. Multiple devices can be placed on the same bus. The references for the two DACs are derived from one reference pin. The outputs of all DACs may be updated simultaneously using the software LDAC function. The parts incorporate a power-on reset circuit that ensures that the DAC outputs power up to 0 V and remain there until a valid write to the device takes place. A software clear function resets all input and DAC registers to 0 V. A power-down feature reduces the current consumption of the devices to 200 nA @ 5 V (80 nA @ 3 V). The low power consumption of these parts in normal operation makes them ideally suited to portable battery-operated equipment. The power consumption is typically 1.5 mW at 5 V and 0.75 mW at 3 V, reducing to 1 W in power-down mode.
APPLICATIONS
Portable battery-powered instruments Digital gain and offset adjustment Programmable voltage and current sources Programmable attenuators Industrial process control
FUNCTIONAL BLOCK DIAGRAM
VDD LDAC REFIN
SCL SDA INTERFACE LOGIC
INPUT REGISTER
DAC REGISTER
STRING DAC A
BUFFER
VOUTA
A0
INPUT REGISTER
DAC REGISTER
STRING DAC B
BUFFER
VOUTB
POWER-DOWN LOGIC
03756-A-001
POWER-ON RESET
AD5337/AD5338/AD5339
GND
Figure 1. 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 that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 (c) 2004 Analog Devices, Inc. All rights reserved.
AD5337/AD5338/AD5339 TABLE OF CONTENTS
Specifications..................................................................................... 3 AC Characteristics........................................................................ 5 Timing Characteristics ................................................................ 6 Absolute Maximum Ratings............................................................ 7 ESD Caution.................................................................................. 7 Pin Configuration and Function Descriptions............................. 8 Terminology ...................................................................................... 9 Typical Performance Characteristics ........................................... 11 Functional Description .................................................................. 15 Digital-to-Analog Converter Section ...................................... 15 Resistor String ............................................................................. 15 DAC Reference Inputs ............................................................... 15 Output Amplifier........................................................................ 15 Power-on Reset ........................................................................... 15 Serial Interface ............................................................................ 15 Write Operation.......................................................................... 17 Read Operation........................................................................... 18 Double-Buffered Interface ........................................................ 19 Power-Down Modes .................................................................. 19 Applications..................................................................................... 20 Typical Application Circuit....................................................... 20 Bipolar Operation....................................................................... 20 Multiple Devices on One Bus ................................................... 20 Product as a Digitally Programmable Window Detector ..... 21 Coarse and Fine Adjustment Capabilities............................... 21 Power Supply Decoupling ......................................................... 21 Outline Dimensions ....................................................................... 24 Ordering Guide .......................................................................... 24
REVISION HISTORY
10/04--Changed Data Sheet from Rev. 0 to Rev. A Updated Format..................................................................Universal Added AD5338-1................................................................Universal Changes to Specifications ................................................................ 4 Updated Outline Dimensions ....................................................... 24 Changes to Ordering Guide .......................................................... 24
11/03--Rev. 0: Initial Version
Rev. A | Page 2 of 24
AD5337/AD5338/AD5339 SPECIFICATIONS
VDD = 2.5 V to 5.5 V; VREF = 2 V; RL = 2 k to GND; CL = 200 pF to GND; all specifications TMIN to TMAX, unless otherwise noted. Table 1.
Parameter1 DC PERFORMANCE3, 4 AD5337 Resolution Relative Accuracy Differential Nonlinearity AD5338 Resolution Relative Accuracy Differential Nonlinearity AD5339 Resolution Relative Accuracy Differential Nonlinearity Offset Error Gain Error Lower Deadband Offset Error Drift5 Gain Error Drift5 Power Supply Rejection Ratio5 DC Crosstalk5 DAC REFERENCE INPUTS5 VREF Input Range VREF Input Impedance Reference Feedthrough OUTPUT CHARACTERISTICS5 This is a measure of the minimum and maximum drive capabilities of the output amplifier. 0.25 37 Min Grade A Typ Max Min Grade B Typ Max Unit B Version2 Conditions/Comments
8 0.15 0.02 10 0.5 0.05 12 2 0.2 0.4 0.15 20 -12 -5 -60 200
1 0.25
8 0.15 0.02 10 0.5 0.05 12 2 0.2 0.4 0.15 20 -12 -5 -60 200
0.5 0.25
Bits LSB LSB Bits LSB LSB Bits LSB LSB % of FSR % of FSR mV ppm of FSR/C ppm of FSR/C dB V Guaranteed monotonic by design over all codes Guaranteed monotonic by design over all codes Guaranteed monotonic by design over all codes
4 0.5
2 0.50
16 1 3 1 60
8 1 3 1 60
Lower deadband exists only if offset error is negative
VDD = 10% RL = 2 k to GND or VDD
VDD 45 >10 -90
0.25 37
VDD 45 >10 -90
V k M dB
Normal operation Power-down mode Frequency = 10 kHz
Minimum Output Voltage6 Maximum Output Voltage6 DC Output Impedance Short Circuit Current
0.001 VDD - 0.001 0.5 25 16 2.5 5
0.001 VDD - 0.001 0.5 25 16 2.5 5
V V mA mA s s
Power-Up Time
VDD = 5 V VDD = 3 V Coming out of power-down mode. VDD = 5 V Coming out of power-down mode. VDD = 3 V
Rev. A | Page 3 of 24
AD5337/AD5338/AD5339
Parameter1 LOGIC INPUTS (A0)5 Input Current VIL, Input Low Voltage Min Grade A Typ Max 1 0.8 0.6 0.5 2.4 2.1 2.0 3
5
Min
Grade B Typ
Max 1 0.8 0.6 0.5
Unit A V V V V V V pF V V A V pF ns
B Version2 Conditions/Comments
VIH, Input High Voltage
2.4 2.1 2.0 3 VDD + 0.3 +0.3 VDD 1 0.7 VDD -0.3 VDD + 0.3 +0.3 VDD 1
VDD = 5 V 10% VDD = 3 V 10% VDD = 2.5 V VDD = 5 V 10% VDD = 3 V 10% VDD = 2.5 V
Pin Capacitance LOGIC INPUTS (SCL, SDA) VIH, Input High Voltage VIL, Input Low Voltage IIN, Input Leakage Current VHYST, Input Hysteresis CIN, Input Capacitance Glitch Rejection LOGIC OUTPUT (SDA)5 VOL, Output Low Voltage Three-State Leakage Current Three-State Output Capacitance POWER REQUIREMENTS VDD IDD (Normal Mode)7 VDD = 4.5 V to 5.5 V VDD = 2.5 V to 3.6 V IDD (Power-Down Mode) VDD = 4.5 V to 5.5 V VDD = 2.5 V to 3.6 V 0.7 VDD -0.3
SMBus-compatible at VDD < 3.6 V SMBus-compatible at VDD < 3.6 V
0.05 VDD 8 50
0.05 VDD 8 50
Input filtering suppresses noise spikes of less than 50 ns ISINK = 3 mA ISINK = 6 mA
0.4 0.6 1 8 8
0.4 0.6 1
V V A pF
2.5 300 250 0.2 0.08
5.5 375 350 1.0 1.00
2.5 300 250 0.2 0.08
5.5 375 350 1.0 1.00
V VIH = VDD and VIL = GND A A A A VIH = VDD and VIL = GND IDD = 4 A (max) during 0 readback on SDA IDD = 1.5 A (max) during 0 readback on SDA
1 2
For explanations of the specific parameters, see the Terminology section. Temperature range: (A and B versions): -40C to +105C; typical at 25C. 3 DC specifications tested with the outputs unloaded. 4 Linearity is tested using a reduced code range: AD5337 (Codes 8 to 248); AD5338, AD5338-1 (Codes 28 to 995); AD5339 (Codes 115 to 3981). 5 Guaranteed by design and characterization; not production tested. 6 For the amplifier output to reach its minimum voltage, offset error must be negative; to reach its maximum voltage, VREF = VDD and offset plus gain error must be positive. 7 IDD specification is valid for all DAC codes. Interface inactive. All DACs active and excluding load currents.
Rev. A | Page 4 of 24
AD5337/AD5338/AD5339
AC CHARACTERISTICS1
VDD = 2.5 V to 5.5 V; RL = 2 k to GND; CL = 200 pF to GND; all specifications TMIN to TMAX, unless otherwise noted. Table 2.
Parameter Output Voltage Settling Time AD5337 AD5338 AD5339 Slew Rate Major-Code Transition Glitch Energy Digital Feedthrough Digital Crosstalk DAC-to-DAC Crosstalk Multiplying Bandwidth Total Harmonic Distortion
3
A and B Versions2 Min Typ Max 6 7 8 0.7 12 1 1 3 200 -70 8 9 10
Unit s s s V/s nV-s nV-s nV-s nV-s kHz dB
Conditions/Comments VREF = VDD = 5 V 1/4 scale to 3/4 scale change (0x40 to 0xC0) 1/4 scale to 3/4 scale change (0x100 to 0x300) 1/4 scale to 3/4 scale change (0x400 to 0xC00) 1 LSB change around major carry
VREF = 2 V 0.1 V p-p VREF = 2.5 V 0.1 V p-p. Frequency = 10 kHz
1 2
Guaranteed by design and characterization; not production tested. Temperature range: A and B versions: -40C to +105C; typical at 25C. 3 For explanations of the specific parameters, see the Terminology section.
Rev. A | Page 5 of 24
AD5337/AD5338/AD5339
TIMING CHARACTERISTICS
VDD = 2.5 V to 5.5 V. All specifications TMIN to TMAX, unless otherwise noted. Table 3.
Parameter fSCL t1 t2 t3 t4 t5 t61 t7 t8 t9 t10 t11 Limit at TMIN, TMAX (A and B Versions) 400 2.5 0.6 1.3 0.6 100 0.9 0 0.6 0.6 1.3 300 0 250 0 300 20 + 0.1 CB2 400 Unit kHz max s min s min s min s min ns min s max s min s min s min s min ns max ns min ns max ns min ns max ns min pF max Conditions/Comments SCL clock frequency SCL cycle time tHIGH, SCL high time tLOW, SCL low time tHD, STA, start/repeated start condition hold time tSU, DAT, data setup time tHD, DAT, data hold time tHD, DAT, data hold time tSU, STA, setup time for repeated start tSU, STO, stop condition setup time tBUF, bus free time between a stop and a start condition tR, rise time of SCL and SDA when receiving tR, rise time of SCL and SDA when receiving (CMOS-compatible) tF, fall time of SDA when transmitting tF, fall time of SDA when receiving (CMOS-compatible) tF, fall time of SCL and SDA when receiving tF, fall time of SCL and SDA when transmitting Capacitive load for each bus line
CB
1
A master device must provide a hold time of at least 300 ns for the SDA signal (referred to VIH min of the SCL signal) in order to bridge the undefined region of SCL's falling edge. 2 CB is the total capacitance of one bus line in pF; tR and tF measured between 0.3 VDD and 0.7 VDD.
SDA
t9
t3
t10
t11
t4
SCL
t4
START CONDITION
t5
t7
REPEATED START CONDITION STOP CONDITION
Figure 2. 2-Wire Serial Interface Timing Diagram
Rev. A | Page 6 of 24
03756-A-002
t6
t2
t1
t8
AD5337/AD5338/AD5339 ABSOLUTE MAXIMUM RATINGS
TA = 25C, unless otherwise noted. Table 4.
Parameter VDD to GND SCL, SDA to GND A0 to GND Reference Input Voltage to GND VOUTA-VOUTB to GND Operating Temperature Range Industrial (B Version) Storage Temperature Range Junction Temperature (TJ max) MSOP Package Power Dissipation JA Thermal Impedance JC Thermal Impedance Reflow Soldering Peak Temperature Time at Peak Temperature Rating -0.3 V to +7 V -0.3 V to VDD + 0.3 V -0.3 V to VDD + 0.3 V -0.3 V to VDD + 0.3 V -0.3 V to VDD + 0.3 V -40C to +105C -65C to +150C 150C (TJ max - TA)JA 206C/W 44C/W 220 +5/-0C 10 s to 40 s
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only, and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Transient currents of up to 100 mA do not cause SCR latch-up.
ESD 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 this product 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.
Rev. A | Page 7 of 24
AD5337/AD5338/AD5339 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
VDD 1 VOUTA 2 VOUTB 3
AD5337/ AD5338/ AD5339
8 A0 7 SCL
03756-A-003
TOP VIEW 6 SDA REFIN 4 (Not to Scale) 5 GND
Figure 3. Pin Configuration
Table 5. Pin Function Descriptions
Pin No. 1 2 3 4 5 6 Mnemonic VDD VOUTA VOUTB REFIN GND SDA Function Power Supply Input. These parts can be operated from 2.5 V to 5.5 V, and the supply should be decoupled to GND. Buffered Analog Output Voltage from DAC A. The output amplifier has rail-to-rail operation. Buffered Analog Output Voltage from DAC B. The output amplifier has rail-to-rail operation. Reference Input Pin for the Two DACs. It has an input range from 0.25 V to VDD. Ground Reference Point for All Circuitry on the Parts. Serial Data Line. This is used in conjunction with the SCL line to clock data into or out of the 16-bit input shift register. It is a bidirectional open-drain data line that should be pulled to the supply with an external pull-up resistor. Serial Clock Line. This is used in conjunction with the SDA line to clock data into or out of the 16-bit input shift register. Clock rates of up to 400 kbps can be accommodated in the 2-wire interface. Address Input. Sets the least significant bit of the 7-bit slave address.
7 8
SCL A0
Rev. A | Page 8 of 24
AD5337/AD5338/AD5339 TERMINOLOGY
Relative Accuracy (Integral Nonlinearity, INL) For the DAC, relative accuracy, or integral nonlinearity (INL), is a measure, in LSBs, of the maximum deviation from a straight line passing through the endpoints of the DAC transfer function. Typical INL vs. code plots can be seen in Figure 6, Figure 7, and Figure 8. Differential Nonlinearity (DNL) The difference between the measured change and the ideal 1 LSB change between any two adjacent codes. A specified differential nonlinearity of 1 LSB maximum ensures monotonicity. This DAC is guaranteed monotonic by design. Typical DNL vs. code plots can be seen in Figure 9, Figure 10, and Figure 11. Offset Error A measure of the offset error of the DAC and the output amplifier, expressed as a percentage of the full-scale range. Gain Error A measure of the span error of the DAC. It is the deviation in slope of the actual DAC transfer characteristic from the ideal, expressed as a percentage of the full-scale range. Offset Error Drift A measure of the change in offset error with changes in temperature. It is expressed in (ppm of full-scale range)/C. Gain Error Drift A measure of the change in gain error with changes in temperature. It is expressed in (ppm of full-scale range)/C. Power Supply Rejection Ratio (PSRR) This indicates how the output of the DAC is affected by changes in the supply voltage. PSRR is the ratio of the change in VOUT to a change in VDD for full-scale output of the DAC. It is measured in dB. VREF is held at 2 V and VDD is varied 10%. DC Crosstalk The dc change in the output level of one DAC at midscale in response to a full-scale code change (all 0s to all 1s and vice versa) and output change of another DAC. It is expressed in V. Reference Feedthrough The ratio of the amplitude of the signal at the DAC output to the reference input when the DAC output is not being updated. It is expressed in dB. Major-Code Transition Glitch Energy The energy of the impulse injected into the analog output when the code in the DAC register changes state. Normally specified as the area of the glitch in nV-s and is measured when the digital code is changed by 1 LSB at the major carry transition (011 . . . 11 to 100 . . . 00 or 100 . . . 00 to 011 . . . 11). Digital Feedthrough A measure of the impulse injected into the analog output of the DAC from the digital input pins of the device when the DAC output is not being updated. Specified in nV-s and measured with a worst-case change on the digital input pins, such as changing from all 0s to all 1s or vice-versa. Digital Crosstalk The glitch impulse transferred to the output of one DAC at midscale in response to a full-scale code change (all 0s to all 1s, or vice versa) in the input register of another DAC. It is expressed in nV-s. DAC-to-DAC Crosstalk The glitch impulse transferred to the output of one DAC due to a digital code change and subsequent output change of another DAC. This includes both digital and analog crosstalk. It is measured by loading one of the DACs with a full-scale code change (all 0s to all 1s, or vice versa) with the LDAC bit set low and monitoring the output of another DAC. The energy of the glitch is expressed in nV-s. Multiplying Bandwidth The amplifiers within the DAC have a finite bandwidth. The multiplying bandwidth is the frequency at which the output amplitude falls to 3 dB below the input. A sine wave on the reference (with full-scale code loaded to the DAC) appears on the output. Total Harmonic Distortion (THD) The difference between an ideal sine wave and its attenuated version using the DAC. The sine wave is used as the reference for the DAC, and the THD is a measure of the harmonic distortion present in the DAC output. It is measured in dB.
Rev. A | Page 9 of 24
AD5337/AD5338/AD5339
GAIN ERROR PLUS OFFSET ERROR
OUTPUT VOLTAGE
IDEAL
ACTUAL OUTPUT VOLTAGE
ACTUAL
GAIN ERROR PLUS OFFSET ERROR
IDEAL
DAC CODE
03756-A-005
NEGATIVE OFFSET ERROR
POSITIVE OFFSET DAC CODE
Figure 5. Transfer Function with Positive Offset
DEADBAND CODES AMPLIFIER FOOTROOM (1mV) NEGATIVE OFFSET ERROR
Figure 4. Transfer Function with Negative Offset
03756-A-004
Rev. A | Page 10 of 24
AD5337/AD5338/AD5339 TYPICAL PERFORMANCE CHARACTERISTICS
1.0 TA = 25C VDD = 5V 0.5 0.3 TA = 25C VDD = 5V 0.2
DNL ERROR (LSB)
03756-A-006
INL ERROR (LSB)
0.1
0
0
-0.1
-0.5 -0.2
0
50
100 CODE
150
200
250
0
50
100 CODE
150
200
250
Figure 6. AD5337 Typical INL Plot
Figure 9. AD5337 Typical DNL Plot
3 TA = 25C VDD = 5V
0.6 TA = 25C VDD = 5V
2
0.4
INL ERROR (LSB)
1
DNL ERROR (LSB)
0.2
0
0
-1
-0.2
-2
-0.4
03756-A-007
0
200
400 CODE
600
800
1000
0
200
400 CODE
600
800
1000
Figure 7. AD5338 Typical INL Plot
Figure 10. AD5338 Typical DNL Plot
12 TA = 25C VDD = 5V
1.0 TA = 25C VDD = 5V 0.5
8
INL ERROR (LSB)
4
0
DNL ERROR (LSB)
0
-4
-0.5 -8
03756-A-008
0
500
1000
1500
2000 CODE
2500
3000
3500
4000
0
500
1000
1500
2000 CODE
2500
3000
3500
4000
Figure 8. AD5339 Typical INL Plot
Figure 11. AD5339 Typical DNL Plot
Rev. A | Page 11 of 24
03756-A-011
-12
-1.0
03756-A-010
-3
-0.6
03756-A-009
-1.0
-0.3
AD5337/AD5338/AD5339
0.50 TA = 25C VDD = 5V 0.25 MAX DNL
ERROR (LSB)
0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 TA = 25C VREF = 2V GAIN ERROR
MAX INL 0 MIN DNL
-0.25 MIN INL
ERROR (%)
OFFSET ERROR -0.5
03756-A-012 03756-A-015 03756-A-017 03756-A-016
-0.50 0 0.5 1.0 1.5 2.0 2.5 VREF (V) 3.0 3.5 4.0 4.5 5.0
-0.6 0 1 2 3 VDD (V) 4 5 6
Figure 12. AD5337 INL and DNL Error vs. VREF
Figure 15. Offset Error and Gain Error vs. VDD
0.5 0.4 0.3 0.2 MAX INL VDD = 5V VREF = 3V
5 5V SOURCE 4
ERROR (LSB)
MAX DNL 0 -0.1 -0.2 -0.3 -0.4
03756-A-013
MIN DNL
VOUT (V)
0.1
3
3V SOURCE
2
MIN INL
1 3V SINK 0 0 1 2 3 4
5V SINK
-0.5 -40
0
40 TEMPERATURE (C)
80
120
5
6
SINK/SOURCE CURRENT (mA)
Figure 13. AD5337 INL and DNL Error vs. Temperature
Figure 16. VOUT Source and Sink Current Capability
1.0 VDD = 5V VREF = 2V 0.5 OFFSET ERROR
ERROR (%) IDD (A)
300
250
200
0 GAIN ERROR
150
100
-0.5
50 TA = 25C VDD = 5V VREF = 2V ZERO SCALE CODE FULL SCALE
0
40 TEMPERATURE (C)
80
120
Figure 14. AD5337 Offset Error and Gain Error vs. Temperature
03756-A-014
-1.0 -40
0
Figure 17. Supply Current vs. Code
Rev. A | Page 12 of 24
AD5337/AD5338/AD5339
300 -40C 250
TA = 25C VDD = 5V VREF = 5V CH1
+25C 200
+105C
VOUTA
IDD (A)
150
100
CH2
50
SCL
03756-A-018
3.0
3.5
4.0 VDD (V)
4.5
5.0
5.5
CH1 1V, CH2 5V, TIME BASE = 1s/DIV
Figure 18. Supply Current vs. Supply Voltage
Figure 21. Half-Scale Settling (1/4 to 3/4 Scale Code Change)
0.5
TA = 25C VDD = 5V VREF = 2V CH1
0.4
0.3
IDD (A)
VDD
-40C
0.2
+25C
CH2
0.1 +105C
03756-A-019
VOUTA
0 2.5
CH1 2V, CH2 200mV, TIME BASE = 200 s/DIV
3.0
3.5
4.0 VDD (V)
4.5
5.0
5.5
Figure 19. Power-Down Current vs. Supply Voltage
Figure 22. Power-On Reset to 0 V
400 TA = 25C 350 300 250 VDD = 5V
TA = 25C VDD = 5V VREF = 2V CH1
DECREASING INCREASING VDD = 3V
IDD (A)
200 150 100 50
VOUTA SCL
CH2
CH1 500mV, CH2 5V, TIME BASE = 1s/DIV
VLOGIC (V)
Figure 20. Supply Current vs. Logic Input Voltage for SDA and SCL Voltage Increasing and Decreasing
Figure 23. Existing Power-Down to Midscale
Rev. A | Page 13 of 24
03756-A-023
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
03756-A-020
0
03756-A-022
03756-A-021
0 2.5
AD5337/AD5338/AD5339
0.02 TA = 25C VDD = 5V
VDD = 3V VDD = 5V
FULL-SCALE ERROR (V)
03756-A-024
0.01
FREQUENCY
0
-0.01
150
200
250 IDD (A)
300
0
1
2
3 VREF (V)
4
5
6
Figure 24. IDD Histogram with VDD = 3 V and VDD = 5 V
Figure 27. Full-Scale Error vs. VREF
2.50
2.49
VOUT (V)
2.48
03756-A-025
1s/DIV
50ns/DIV
Figure 25. AD5339 Major-Code Transition Glitch Energy
Figure 28. DAC-to-DAC Crosstalk
10
0
-10
-20
dB
-30
-40
-50
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 26. Multiplying Bandwidth (Small-Signal Frequency Response)
Rev. A | Page 14 of 24
03756-A-026
-60 10
03756-A-028
2.47
1mV/DIV
03756-A-027
-0.02
AD5337/AD5338/AD5339 FUNCTIONAL DESCRIPTION
The AD5337/AD5338/AD5339 are dual resistor-string DACs fabricated on a CMOS process with resolutions of 8, 10, and 12 bits, respectively. Each contains two output buffer amplifiers and is written to via a 2-wire serial interface. The DACs operate from single supplies of 2.5 V to 5.5 V, and the output buffer amplifiers provide rail-to-rail output swing with a slew rate of 0.7 V/s. The two DACs share a single reference input pin. Each DAC has three programmable power-down modes that allow the output amplifier to be configured with either a 1 k load to ground, a 100 k load to ground, or as a high impedance three-state output.
R R R TO OUTPUT AMPLIFIER
R R
03756-A-030
DIGITAL-TO-ANALOG CONVERTER SECTION
The architecture of one DAC channel consists of a resistorstring DAC followed by an output buffer amplifier. The voltage at the REFIN pin provides the reference voltage for the DAC. Figure 29 shows a block diagram of the DAC architecture. Because the input coding to the DAC is straight binary, the ideal output voltage is given by
VOUT = VREF x D 2N
Figure 30. Resistor String
DAC REFERENCE INPUTS
There is a single reference input pin for the two DACs. The reference input is unbuffered. The user can have a reference voltage as low as 0.25 V and as high as VDD, since there is no restriction due to headroom and foot room of any reference amplifier. It is recommended to use a buffered reference in the external circuit, for example, REF192. The input impedance is typically 45 k.
where: D is the decimal equivalent of the binary code, which is loaded to the DAC register; 0-255 for AD5337 (8 bits) 0-1023 for AD5338 and AD5338-1 (10 bits) 0-4095 for AD5339 (12 bits) N is the DAC resolution
REFIN
OUTPUT AMPLIFIER
The output buffer amplifier is capable of generating rail-to-rail voltages on its output, which gives an output range of 0 V to VDD when the reference is VDD. The amplifier is capable of driving a load of 2 k to GND or VDD in parallel with 500 pF to GND or VDD. The source and sink capabilities of the output amplifier can be seen in the plot in Figure 16. The slew rate is 0.7 V/s with a half-scale settling time to 0.5 LSB (at 8 bits) of 6 s.
INPUT REGISTER
DAC REGISTER
RESISTOR STRING
VOUTA
03756-A-029
POWER-ON RESET
The AD5337/AD5338/AD5339 power on in a defined state via a power-on reset function. The power-on state is normal operation, with output voltage set to 0 V. Both input and DAC registers are filled with zeros until a valid write sequence is made to the device. This is particularly useful in applications where it is important to know the state of the DAC outputs while the device is powering on.
OUTPUT BUFFER AMPLIFIER
Figure 29. DAC Channel Architecture
RESISTOR STRING
The resistor string portion is shown in Figure 30. It is simply a string of resistors, each of value R. The digital code loaded to the DAC register determines the node at which the voltage is tapped off and fed into the output amplifier. The voltage is tapped off by closing one of the switches that connects the string to the amplifier. Because the DAC comprises a string of resistors, it is guaranteed to be monotonic.
SERIAL INTERFACE
The AD5337/AD5338/AD5339 are controlled via an I2Ccompatible serial bus. The DACs are connected to this bus as slave devices--that is, no clock is generated by the AD5337/ AD5338/AD5339 DACs. This interface is SMBus-compatible at VDD < 3.6 V.
Rev. A | Page 15 of 24
AD5337/AD5338/AD5339
The AD5337/AD5338/AD5339 have a 7-bit slave address. The six MSBs are 000110, and the LSB is determined by the state of the A0 pin. The facility of making hardwired changes to A0 allows the use of one or two of these devices on one bus. The AD5338-1 has a unique 7-bit slave address. The six MSBs are 010001, and the LSB is again determined by the state of the A0 pin. Using a combination of AD5338 and AD5338-1 allows the user to accommodate four of these dual 10-bit devices (eight channels) on the same bus. The 2-wire serial bus protocol operates as follows:
DOUBLE
MSB X X 0 DOUBLE = 0 0 0 LSB DACB DACA
03756-A-031
Figure 31. Pointer Byte
The following table explains the individual bits that make up the pointer byte. Table 6. Pointer Byte Bits
Pointer X Byte Bits Don't care bits. 0: Bit set to 0. 0: Data write and readback are done as 2-byte write/read sequences. 0: Bit set to 0. 0: Bit set to 0. 1: The following data bytes are for DAC B. 1: The following data bytes are for DAC A.
1.
The master initiates data transfer by establishing a start condition when a high-to-low transition on the SDA line occurs while SCL is high. The following byte is the address byte, which consists of the 7-bit slave address, followed by an R/W bit. (This bit determines whether data is read from or written to the slave device.) The slave with the address corresponding to the transmitted address responds by pulling SDA low during the ninth clock pulse (this is termed the acknowledge bit). At this stage, all other devices on the bus remain idle while the selected device waits for data to be written to or read from its shift register.
DACB DACA
Input Shift Register
The input shift register is 16 bits wide. Data is loaded into the device as two data bytes on the serial data line, SDA, under the control of the serial clock input, SCL. The timing diagram for this operation is shown in Figure 2. The two data bytes consist of four control bits followed by 8, 10, or 12 bits of DAC data, depending on the device type. The first two bits loaded are PD1 and PD0 bits that control the mode of operation of the device. See the Power-Down Modes section for a complete description. Bit 13 is CLR, Bit 12 is LDAC, and the remaining bits are leftjustified DAC data bits, starting with the MSB. See Figure 32. Table 7. Input Shift Register
Register CLR Setting and Result 0: All DAC registers and input registers are filled with 0s on completion of the write sequence. 1: Normal operation. 0: The two DAC registers and therefore all DAC outputs simultaneously updated on completion of the write sequence. 1: Addressed input register only is updated. There is no change in the contents of the DAC registers.
2.
Data is transmitted over the serial bus in sequences of nine clock pulses (eight data bits, followed by an acknowledge bit). The transitions on the SDA line must occur during the low period of SCL and remain stable during the high period of SCL. When all data bits have been read from or written to, a stop condition is established. In write mode, the master pulls the SDA line high during the 10th clock pulse to establish a stop condition. In read mode, the master issues a No Acknowledge for the ninth clock pulse, that is, the SDA line remains high. The master then brings the SDA line low before the 10th clock pulse and high during the 10th clock pulse to establish a stop condition.
3.
LDAC
Read/Write Sequence
For the AD5337/AD5338/AD5339, all write access sequences and most read sequences begin with the device address (with R/W = 0), followed by the pointer byte. This pointer byte specifies the data format and determines which DAC is being accessed in the subsequent read/write operation. See Figure 31. In a write operation, the data follows immediately. In a read operation, the address is resent with R/W = 1, and then the data is read back. However, it is also possible to perform a read operation by sending only the address with R/W = 1. The previously loaded pointer settings are then used for the read back operation. See Figure 32 for a graphical explanation of the interface.
Default Read Back Condition
All pointer byte bits power-up to 0. Therefore, if the user initiates a readback without writing to the pointer byte first, no single DAC channel has been specified. In this case, the default readback bits are all 0, except for the CLR bit, which is 1.
Multiple-DAC Write Sequence
Because there are individual bits in the pointer byte for each DAC, it is possible to write the same data and control bits to two DACs simultaneously by setting the relevant bits to 1.
Rev. A | Page 16 of 24
AD5337/AD5338/AD5339
Multiple-DAC Read Back Sequence.
If the user attempts to read back data from more than one DAC at a time, the part reads back the default, power-on reset conditions, i.e., all 0s except for CLR, which is 1.
WRITE OPERATION
When writing to the AD5337/AD5338/AD5339 DACs, the user must begin with an address byte (R/W = 0), after which the DAC acknowledges that it is prepared to receive data by pulling SDA low. This address byte is followed by the pointer byte, which is also acknowledged by the DAC. Two bytes of data are then written to the DAC, as shown in Figure 33. A stop condition follows.
MSB PD1 MSB PD1 MSB PD1 PD0 PD0 PD0
MOST SIGNIFICANT DATA BYTE 8-BIT AD5337 CLR LDAC D7 D6 D5
LSB D4 LSB
MSB D3 MSB D5 MSB D7 D6 D4 D2
LEAST SIGNIFICANT DATA BYTE 8-BIT AD5337 D1 D0 X X X
LSB X LSB
10-BIT AD5338 CLR LDAC D9 D8 D7
10-BIT AD5338 D3 D2 D1 D0 X
D6 LSB
X LSB
03756-A-032
12-BIT AD5339 CLR LDAC D11 D10 D9
12-BIT AD5339 D5 D4 D3 D2 D1
D8
D0
Figure 32. Data Formats for Write and Read Back
SCL
SDA START CONDITION BY MASTER
0
0
0
1
1
0
A0
R/W ACK BY AD533x
X MSB
X
LSB ACK BY AD533x
ADDRESS BYTE
POINTER BYTE
SCL
SDA
MSB MOST SIGNIFICANT DATA BYTE
LSB ACK BY AD533x
MSB LEAST SIGNIFICANT DATA BYTE
LSB
03756-A-033
ACK BY AD533x
STOP CONDITION BY MASTER
Figure 33. Write Sequence
Rev. A | Page 17 of 24
AD5337/AD5338/AD5339
READ OPERATION
When reading data back from the AD5337/AD5338/AD5339 DACs, the user begins with an address byte (R/W = 0), after which the DAC acknowledges that it is prepared to receive data by pulling SDA low. This address byte is usually followed by the pointer byte, which is also acknowledged by the DAC. Then the master initiates another start condition (repeated start) and the address is resent with R/W = 1. This is acknowledged by the DAC indicating that it is prepared to transmit data. Two bytes of data are then read from the DAC as shown in Figure 34. A stop condition follows. Note that in a read sequence, data bytes are the same as those in the write sequence except that don't cares are read back as 0. However, if the master sends an ACK and continues clocking SCL (no stop is sent), the DAC retransmits the same two bytes of data on SDA. This allows continuous read back of data from the selected DAC register. Alternatively, the user may send a start followed by the address with R/W = 1. In this case, the previously loaded pointer settings are used and read back of data can begin immediately.
SCL
SDA START CONDITION BY MASTER
0
0
0
1
1
0
A0
R/W
X
X
LSB ACK BY AD533x
ADDRESS BYTE
MSB ACK BY AD533x
POINTER BYTE
SCL
SDA REPEATED START CONDITION BY MASTER
0
0
0
1
1
0
A0
R/W ACK BY AD533x
MSB
LSB ACK BY MASTER
ADDRESS BYTE
DATA BYTE
SCL
SDA
MSB
LSB NO ACK BY MASTER STOP CONDITION BY MASTER
03756-A-034
LEAST SIGNIFICANT DATA BYTE
Figure 34. Read Sequence
Rev. A | Page 18 of 24
AD5337/AD5338/AD5339
DOUBLE-BUFFERED INTERFACE
The AD5337/AD5338/AD5339 DACs all have a double-buffered interface consisting of two banks of registers--an input register and a DAC register per channel. The input register is directly connected to the input shift register, and the digital code is transferred to the relevant input register upon completion of a valid write sequence. The DAC register contains the digital code used by the resistor string. Access to the DAC register is controlled by the LDAC bit. When the LDAC bit is set high, the DAC register is latched and therefore the input register may change state without affecting the DAC register. This is useful if the user requires simultaneous updating of all DAC outputs. The user may write to three of the input registers individually; by setting the LDAC bit low when writing to the remaining DAC input register, all outputs will update simultaneously. These parts contain an extra feature whereby the DAC register is only updated if its input register has been updated since the last time that LDAC was brought low, thereby removing unnecessary digital crosstalk. When both bits are 0, the DAC works with its normal power consumption of 300 A at 5 V. However, for the three powerdown modes, the supply current falls to 200 nA at 5 V (80 nA at 3 V). Not only does the supply current drop, but the output stage is also internally switched from the output of the amplifier to a resistor network of known values. This is advantageous in that the output impedance of the part is known while the part is in power-down mode, which provides a defined input condition for whatever is connected to the output of the DAC amplifier. There are three options. The output may be connected internally to GND through a 1 k resistor, a 100 k resistor, or may be left open-circuited (3-state). Resistor tolerance = 20%. The output stage is illustrated in Figure 35.
RESISTOR STRING DAC
AMPLIFIER
VOUT
Figure 35. Output Stage during Power-Down
POWER-DOWN MODES
The AD5337/AD5338/AD5339 have very low power consumption, typically dissipating 0.75 mW with a 3 V supply and 1.5 mW with a 5 V supply. Power consumption can be further reduced when the DACs are not in use by putting them into one of three power-down modes, which are selected by Bits 15 and 14 (PD1 and PD0) of the data byte. Table 8 shows how the state of the bits corresponds to the mode of operation of the DAC. Table 8. PD1/PD0 Operating Modes
PD1 0 0 1 1 PD0 0 1 0 1 Operating Mode Normal Operation Power-Down (1 k Load to GND) Power-Down (100 k Load to GND) Power-Down (3-State Output)
The bias generator, the output amplifiers, the resistor string, and all other associated linear circuitry are shut down when powerdown mode is activated. However, the contents of the DAC registers remain unchanged when power-down mode is activated. The time to exit power-down is typically 2.5 s for VDD = 5 V and 5 s when VDD = 3 V. This is the time from the rising edge of the eighth SCL pulse to the time when the output voltage deviates from its power-down voltage. See Figure 23 for a plot.
Rev. A | Page 19 of 24
03756-A-035
POWER-DOWN CIRCUITRY
RESISTOR NETWORK
AD5337/AD5338/AD5339 APPLICATIONS
TYPICAL APPLICATION CIRCUIT
The AD5337/AD5338/AD5339 can be used with a wide range of reference voltages for full, one-quadrant multiplying capability over a reference range of 0 V to VDD. More typically, these devices are used with a fixed precision reference voltage. Suitable references for 5 V operation are the AD780, the REF192, and the ADR391 (2.5 V references). For 2.5 V operation, a suitable external reference would be the AD589 or AD1580, a 1.23 V band gap reference. Figure 36 shows a typical setup for the AD5337/AD5338/AD5339 when using an external reference. Note that A0 can be high or low.
VDD = 2.5V TO 5.5V
BIPOLAR OPERATION
The AD5337/AD5338/AD5339 are designed for single-supply operation, but a bipolar output range is also possible using the circuit in Figure 37. This circuit gives an output voltage range of 5 V. Rail-to-rail operation at the amplifier output is achievable using an AD820 or an OP295 as the output amplifier.
R2 = 10k +5V 6V TO 12V 10F 0.1F +5V VDD AD1585 VIN VOUT GND 1F VOUTA R1 = 10k AD820/ OP295 5V
AD5339
REFIN VOUTB
-5V
0.1F
10F
AD5337/ AD5338/ AD5339
VOUTA REFIN
A0 GND SCL SDA
VIN EXT REF VOUT 1F
VOUTB
2-WIRE SERIAL INTERFACE
AD780/REF192/ADR391 WITH VDD = 5V OR AD589/AD1580 WITH VDD = 2.5V
SCL SDA A0 GND
03756-A-036
Figure 37. Bipolar Operation with the AD5339
SERIAL INTERFACE
The output voltage for any input code can be calculated as follows:
Figure 36. AD5337/AD5338/AD5339 Using External Reference
VOUT (REFIN (D 2 N ) x (R1 + R2
[
) R1) - REFIN x (R2 R1)]
If an output range of 0 V to VDD is required, the simplest solution is to connect the reference input to VDD. Because this supply may be inaccurate and noisy, the AD5337/AD5338/ AD5339 may be powered from a reference voltage, for example, using a 5 V reference such as the REF195 which provides a steady output supply voltage. With no load on the DACs, the REF195 is required to supply 600 A supply current to the DAC and 112 A to the reference input. When the DAC outputs are loaded, the REF195 also needs to supply the current to the loads; therefore, the total current required with a 10 k load on each output is 712 A + 2(5 V/10 k) = 1.7 mA The load regulation of the REF195 is typically 2 ppm/mA, which results in an error of 3.4 ppm (17 V) for the 1.7 mA current drawn from it. This corresponds to a 0.0009 LSB error at 8 bits and a 0.014 LSB error at 12 bits.
where: D is the decimal equivalent of the code loaded to the DAC. N is the DAC resolution. REFIN is the reference voltage input. With REFIN = 5 V, R1 = R2 = 10 k: VOUT = (10 x D/2N) - 5
MULTIPLE DEVICES ON ONE BUS
Figure 38 shows two AD5339 devices on the same serial bus. Each has a different slave address because the state of the A0 pin is different. This allows each of four DACs to be written to or read from independently.
VDD PULL-UP RESISTORS A0
AD5339
SCL
SDA
MICROCONTROLLER
SDA A0
SCL
03756-A-038
AD5339
Figure 38. Multiple AD5339 Devices on One Bus
Rev. A | Page 20 of 24
03756-A-037
AD5337/AD5338/AD5339
PRODUCT AS A DIGITALLY PROGRAMMABLE WINDOW DETECTOR
Figure 39 shows a digitally programmable upper/lower limit detector using the two DACs in the AD5337/AD5338/AD5339. The upper and lower limits for the test are loaded into DAC A and DAC B, which, in turn, set the limits on the CMP04. If the signal at the VIN input is not within the programmed window, an LED indicates the fail condition.
5V 0.1F 10F VIN 1k 1k PASS
POWER SUPPLY DECOUPLING
In any circuit where accuracy is important, careful consideration of the power supply and ground return layout helps to ensure the rated performance. The printed circuit board on which the AD5337/AD5338/AD5339 is mounted should be designed so that the analog and digital sections are separated and confined to certain areas of the board. If the AD5337/AD5338/AD5339 is in a system where multiple devices require an AGND-toDGND connection, the connection should be made at one point only. The star ground point should be established as close as possible to the device. The AD5337/AD5338/AD5339 should have ample supply bypassing of 10 F in parallel with 0.1 F on the supply located as close to the package as possible, ideally right up against the device. The 10 F capacitors are the tantalum bead type. The 0.1 F capacitor should have low effective series resistance (ESR) and low effective series inductance (ESI) to provide a low impedance path to ground at high frequencies to handle transient currents due to internal logic switching. The power supply lines of the AD5337/AD5338/ AD5339 should use as large a trace as possible to provide low impedance paths and reduce the effects of glitches on the power supply line. Fast switching signals such as clocks should be shielded with digital ground to avoid radiating noise to other parts of the board, and they should never be run near the reference inputs. A ground line routed between the SDA and SCL lines helps to reduce crosstalk between them. This is not required on a multilayer board because there is a separate ground plane, but separating the lines does help. Avoid crossover of digital and analog signals. Traces on opposite sides of the board should run at right angles to each other. This reduces the effects of feedthrough through the board. Using a microstrip technique is the best solution, but its use is not always possible with a double-sided board. In this technique, the component side of the board is dedicated to ground plane, while signal traces are placed on the solder side.
FAIL VREF REFIN VDD VOUTA
AD5337/ AD5338/ AD5339*
DIN SCL SDA SCL GND * ADDITIONAL PINS OMITTED FOR CLARITY VOUTB
1/2 CMP04
PASS/FAIL
1/6 74HC05
03756-A-039
Figure 39. Window Detection
COARSE AND FINE ADJUSTMENT CAPABILITIES
The two DACs in the AD5337/AD5338/AD5339 can be paired together to form a coarse and fine adjustment function, as shown in Figure 40. DAC A is used to provide the coarse adjustment while DAC B provides the fine adjustment. Varying the ratio of R1 and R2 changes the relative effect of the coarse and fine adjustments. With the resistor values and external reference shown, the output amplifier has unity gain for the DAC A output, thus the output range is 0 V to 2.5 V - 1 LSB. For DAC B the amplifier has a gain of 7.6 x 10-3, giving DAC B a range equal to 19 mV. The circuit is shown with a 2.5 V reference, but reference voltages up to VDD may be used. The op amps indicated will allow a rail-to-rail output swing.
VDD = 5V R3 51.2k R4 390 5V
0.1F
10F
VIN EXT VOUT REF GND
VDD REFIN 1F VOUTA R1 390 AD820/ OP295
VOUT
AD780/REF192/ADR391 WITH VDD = 5V
AD5337/ AD5338/ AD5339*
GND VOUTB
*ADDITIONAL PINS OMITTED FOR CLARITY
Figure 40. Coarse/Fine Adjustment
Rev. A | Page 21 of 24
03756-A-039
R2 51.2k
AD5337/AD5338/AD5339
Table 9. Overview of All AD53xx Serial Devices
Part No. Singles AD5300 AD5310 AD5320 AD5301 AD5311 AD5321 Duals AD5302 AD5312 AD5322 AD5303 AD5313 AD5323 AD5337 AD5338 AD5338-1 AD5339 Quads AD5304 AD5314 AD5324 AD5305 AD5315 AD5325 AD5306 AD5316 AD5326 AD5307 AD5317 AD5327 Octals AD5308 AD5318 AD5328 Resolution 8 10 12 8 10 12 8 10 12 8 10 12 8 10 10 12 8 10 12 8 10 12 8 10 12 8 10 12 8 10 12 No. of DACs 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 4 4 4 4 4 4 4 4 4 4 4 4 8 8 8 DNL 0.25 0.50 1.00 0.25 0.50 1.00 0.25 0.50 1.00 0.25 0.50 1.00 0.25 0.50 0.50 1.00 0.25 0.50 1.00 0.25 0.50 1.00 0.25 0.50 1.00 0.25 0.50 1.00 0.25 0.50 1.00 Interface SPI SPI SPI 2-Wire 2-Wire 2-Wire SPI SPI SPI SPI SPI SPI 2-Wire 2-Wire 2-Wire 2-Wire SPI SPI SPI 2-Wire 2-Wire 2-Wire 2-Wire 2-Wire 2-Wire SPI SPI SPI SPI SPI SPI Settling Time 4 s 6 s 8 s 6 s 7 s 8 s 6 s 7 s 8 s 6 s 7 s 8 s 6 s 7 s 7 s 8 s 6 s 7 s 8 s 6 s 7 s 8 s 6 s 7 s 8 s 6 s 7 s 8 s 6 s 7 s 8 s Package SOT-23, MSOP SOT-23, MSOP SOT-23, MSOP SOT-23, MSOP SOT-23, MSOP SOT-23, MSOP MSOP MSOP MSOP TSSOP TSSOP TSSOP MSOP MSOP MSOP MSOP MSOP MSOP MSOP MSOP MSOP MSOP TSSOP TSSOP TSSOP TSSOP TSSOP TSSOP TSSOP TSSOP TSSOP Pins 6, 8 6, 8 6, 8 6, 8 6, 8 6, 8 8 8 8 16 16 16 8 8 8 8 10 10 10 10 10 10 16 16 16 16 16 16 16 16 16
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Rev. A | Page 22 of 24
AD5337/AD5338/AD5339
Table 10. Overview of AD53xx Parallel Devices
Part No. Singles AD5330 AD5331 AD5340 AD5341 Duals AD5332 AD5333 AD5342 AD5343 Quads AD5334 AD5335 AD5336 AD5344 Octals AD5346 AD5347 AD5348 Resolution 8 10 12 12 8 10 12 12 8 10 10 12 8 10 12 DNL 0.25 0.50 1.00 1.00 0.25 0.50 1.00 1.00 0.25 0.50 0.50 1.00 0.25 0.50 1.00 VREF Pins 1 1 1 1 2 2 2 1 2 2 4 4 4 4 4 Settling Time 6 s 7 s 8 s 8 s 6 s 7 s 8 s 8 s 6 s 7 s 7 s 8 s 6 s 7 s 8 s Additional Pin Functions BUF GAIN HBEN CLR Package TSSOP TSSOP TSSOP TSSOP TSSOP TSSOP TSSOP TSSOP TSSOP TSSOP TSSOP TSSOP TSSOP LFCSP TSSOP TSSOP Pins 20 20 24 20 20 24 28 20 24 24 28 28 38, 40 38, 40 38, 40

Rev. A | Page 23 of 24
AD5337/AD5338/AD5339 OUTLINE DIMENSIONS
3.00 BSC
8
5
3.00 BSC
4
4.90 BSC
PIN 1 0.65 BSC 1.10 MAX 8 0 0.80 0.60 0.40
0.15 0.00 0.38 0.22 COPLANARITY 0.10
0.23 0.08 SEATING PLANE
COMPLIANT TO JEDEC STANDARDS MO-187AA
Figure 41. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters
ORDERING GUIDE
Model AD5337ARM AD5337ARM-REEL7 AD5337BRM AD5337BRM-REEL AD5337BRM-REEL7 AD5338ARM AD5338ARM-REEL7 AD5338BRM AD5338BRM-REEL AD5338BRM-REEL7 AD5338ARMZ-1 AD5338ARMZ-1REEL7 AD5338BRMZ-1 AD5338BRMZ-1REEL7 AD5339ARM AD5339ARM-REEL7 AD5339BRM AD5339BRM-REEL AD5339BRM-REEL7 Temperature Range -40C to +105C -40C to +105C -40C to +105C -40C to +105C -40C to +105C -40C to +105C -40C to +105C -40C to +105C -40C to +105C -40C to +105C -40C to +105C -40C to +105C -40C to +105C -40C to +105C -40C to +105C -40C to +105C -40C to +105C -40C to +105C -40C to +105C Package Description 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP 8-Lead MSOP Package Option RM-8 RM-8 RM-8 RM-8 RM-8 RM-8 RM-8 RM-8 RM-8 RM-8 RM-8 RM-8 RM-8 RM-8 RM-8 RM-8 RM-8 RM-8 RM-8 Branding D23 D23 D20 D20 D20 D24 D24 D21 D21 D21 D5G D5G D5J D5J D25 D25 D22 D22 D22
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(c) 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D03756-0-10/04(A)
Rev. A | Page 24 of 24

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