AD5441BRMZ-REEL7 [ADI]
12-Bit Serial Input Multiplying DAC;
| 型号： | AD5441BRMZ-REEL7 |
| 厂家： | 
ADI |
| 描述： | 12-Bit Serial Input Multiplying DAC 光电二极管 转换器 |
| 文件： | 总17页 (文件大小：420K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
12-Bit Serial Input
Multiplying DAC
AD5441
FEATURES
FUNCTIONAL BLOCK DIAGRAM
2.5 V to 5.5 V supply operation
True 12-bit accuracy
5 V operation @ <1 μA
AD5441
V
R
I
DD
FB
V
DAC
REF
OUT
Fast 3-wire serial input
12
Fast 5 μs settling time
LD
DAC REG
1.9 MHz, 4-quadrant multiply BW
Upgrade for DAC8043 and DAC8043A
Standard and rotated pinout
12
GND
CLK
SRI
12-BIT SHIFT
REGISTER
APPLICATIONS
Figure 1.
Ideal for PLC applications in industrial control
Programmable amplifiers and attenuators
Digitally controlled calibration and filters
Motion control systems
GENERAL DESCRIPTION
The AD5441 is an improved high accuracy 12-bit multiplying
digital-to-analog converter (DAC) in space-saving 8-lead
packages. Featuring serial input, double buffering, and excellent
analog performance, the AD5441 is ideal for applications where
PC board space is at a premium. Improved linearity and gain
error performance permit reduced part counts through the
elimination of trimming components. Separate input clock and
load DAC control lines allow full user control of data loading
and analog output.
The circuit consists of a 12-bit serial-in/parallel-out shift register, a
12-bit DAC register, a 12-bit CMOS DAC, and control logic.
Serial data is clocked into the input register on the rising edge of
the clock pulse. When the new data-word is clocked in, it is
LD
loaded into the DAC register with the
input pin. Data in the
DAC register is converted to an output current by the DAC.
Consuming only 1 μA from a single 5 V power supply, the
AD5441 is the ideal low power, small size, high performance
solution to many application problems.
The AD5441 is specified over the extended industrial (−40°C to
+125°C) temperature range. It is available in an 8-lead LFCSP
and an 8-lead MSOP.
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.
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AD5441* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
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• AD5441: 12-Bit Serial Input Multiplying DAC Data Sheet
TECHNICAL SUPPORT
REFERENCE MATERIALS
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number.
• Digital to Analog Converters ICs Solutions Bulletin
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DESIGN RESOURCES
• AD5441 Material Declaration
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AD5441
TABLE OF CONTENTS
Features .............................................................................................. 1
Typical Performance Characteristics ..............................................7
Terminology.................................................................................... 10
Parameter Definitions.................................................................... 11
General Circuit Information..................................................... 11
Output Impedance ..................................................................... 11
Applications Information.......................................................... 11
Unipolar 2-Quadrant Multiplying ........................................... 11
Bipolar 4-Quadrant Multiplying .............................................. 12
Interface Logic Information...................................................... 12
Digital Section ............................................................................ 12
Outline Dimensions....................................................................... 13
Ordering Guide .......................................................................... 13
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics............................................................. 3
Timing Characteristics ................................................................ 4
Absolute Maximum Ratings............................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution.................................................................................. 5
Pin Configurations and Function Descriptions ........................... 6
REVISION HISTORY
3/11—Rev. 0 to Rev. A
Deleted Figure 2................................................................................ 4
Added Timing Diagrams Section................................................... 4
Added New Figure 2, Figure 3, and Figure 4, Renumbered
Figures Sequentially ......................................................................... 4
Changes to Figure 5 and Table 6..................................................... 6
Updated Outline Dimensions....................................................... 13
Changes to Ordering Guide .......................................................... 13
1/08—Revision 0: Initial Version
Rev. A | Page 2 of 16
AD5441
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
VDD = 5 V, VREF = 10 V, −40°C < TA < +155°C, unless otherwise noted.
Table 1.
Parameter
Symbol
Min Typ Max
Unit
Condition
STATIC PERFORMANCE
Resolution
Relative Accuracy
Differential Nonlinearity
Gain Error
Gain Temperature Coefficient1
Output Leakage Current
N
12
Bits
LSB
LSB
LSB
INL
DNL
GFSE
TCGFS
ILKG
±±.ꢀ
±±.ꢀ
±1
±ꢀ
±ꢀ
All grades monotonic to 12 bits
Data = FFFH
ppm/°C IOUT pin measured
nA
nA
Data = ±±±H, IOUT pin measured
TA = –4±°C, +12ꢀ°C, data = ±±±H, IOUT pin measured
±2ꢀ
Zero-Scale Error
IZSE
±±.±3 LSB
±±.1ꢀ LSB
Data = ±±±H
TA = −4±°C, +12ꢀ°C, data = ±±±H
REFERENCE INPUT
Input Resistance
Input Capacitance1
ANALOG OUTPUT
Output Capacitance1
RREF
CREF
7
1ꢀ
kΩ
pF
Absolute temperature coefficient < ꢀ± ppm/°C
ꢀ
COUT
1
4
pF
pF
Data = ±±±H
Data = FFFH
DIGITAL INPUTS
Digital Input Low
Digital Input High
Input Leakage Current
Input Capacitance1
AC CHARACTERISTICS1
Output Current Settling Time
VIL
VIH
IIL
±.8
1
V
V
μA
pF
2.4
VLOGIC = ± V to ꢀ V
VLOGIC = ± V
CIL
4.±
ꢀ
tS
Q
μs
μs
nVs
nVs
To ±±.±1ꢁ of full-scale, external op amp OP42
To ±±.±1ꢁ of full-scale, 1±± Ω terminated to ground
Data = ±±±H to FFFH to ±±±H, VREF = ± V, OP42
Data = ±±±H to FFFH to ±±±H, VREF = ± V, 1±± Ω
Using external op amp OP42
±.ꢀ
1
DAC Glitch
4±
Digital Feedthrough
ꢀ
nV
Feedthrough (VOUT/VREF
)
FT
THD
en
1.4
−8ꢀ
mV p-p
dB
nV/√Hz
MHz
VREF = 2± V p-p, data = ±±±H, f = 1± kHz
VREF = 6 V rms, data = FFFH, f = 1 kHz
1± Hz to 1±± kHz between RFB and IOUT
−3 dB, VOUT/VREF, VREF = 1±± mV rms, data = FFFH
Total Harmonic Distortion
Output Noise Density
Multiplying Bandwidth
SUPPLY CHARACTERISTICS1
Power Supply Range
Positive Supply Current
Power Dissipation
Power Supply Sensitivity
17
BW
1.9
VDD RANGE
IDD
PDISS
2.ꢀ
2.ꢀ
ꢀ.ꢀ
1±
ꢀ.ꢀ
±.±±2
V
μA
μW
ꢁ/ꢁ
VLOGIC = ± V or VDD
VLOGIC = ± V or VDD
ΔVDD = ±ꢀꢁ
PSS
1 These parameters are guaranteed by design and not subject to production testing.
Rev. A | Page 3 of 16
AD5441
TIMING CHARACTERISTICS
All input control signals are specified with tR = tF = 2 ns (10% to 90% of VDD) and timed from a voltage level of (VIL + VIH)/2; VDD + 2.5 V
to 5.5 V, VREF = 10 V; temperature range = −40°C to +125°C; all specifications TMIN to TMAX, unless otherwise noted.
Table 2. Timing Characteristics
Parameter 2.5 V
5.5 V
Unit
Conditions/Comments
Data setup
Data hold
Clock width high
Clock width low
Load pulse width
LD DAC high to MSB CLK high
LSB CLK to LD DAC
tDS
tDH
tCH
tCL
tLD
tLD1
tASB
1±
ꢀ
1ꢀ
1ꢀ
2±
±
ꢀ
ꢀ
1±
1±
1±
±
ns min
ns min
ns min
ns min
ns min
ns min
ns min
±
±
Timing Diagrams
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
SRI
CLK
tLD1
tASB
LD
DAC REGISTER LOAD
Figure 2. Full Data Transmission
DATA LOADED MSB(D11) FIRST
Dxx
SRI
tDS
tDH
tCL
CLK
tCH
Figure 3. Bit Data Transmission
tLD
LD
FS
ZS
±1LSB
ERROR BAND
V
OUT
Figure 4. Output Transition
Table 3. Control Logic Truth Table
LD
CLK
Serial Shift Register Function
DAC Register Function
1
H
Shift register data advanced one bit
Latched
↑
L
L
Shift register data advanced one bit
Transparent
↑
H or L
No effect
No effect
Updated with current shift register contents
Latched all 12 bits
L
1
↑
1
↑ equals positive logic transition.
Rev. A | Page 4 of 16
AD5441
ABSOLUTE MAXIMUM RATINGS
Table 4.
Parameter
THERMAL RESISTANCE
Rating
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
VDD to GND
VREF to GND
−±.3 V, +8 V
±18 V
RFB to GND
Logic Inputs to GND
IOUT to GND
IOUT Short Circuit to GND
Package Power Dissipation
Maximum Junction Temperature (TJ max)
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 1± sec)
±18 V
Table 5.
−±.3 V, VDD + ±.3 V
−±.3 V, VDD + ±.3 V
ꢀ± mA
(TJ max − TA)/θJA
1ꢀ±°C
−4±°C to +12ꢀ°C
−6ꢀ°C to +1ꢀ±°C
3±±°C
Package Type
8-Lead MSOP
8-Lead LFCSP1
θJA
142
7ꢀ
θJC
44
18
Unit
°C/W
°C/W
1 Exposed pad soldered to the ground plane.
ESD CAUTION
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 indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Rev. A | Page ꢀ of 16
AD5441
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
V
V
DD
1
2
3
4
8
7
6
5
REF
PIN 1
V
1
2
3
INDICATOR
8
7
6
5
V
DD
REF
AD5441
TOP VIEW
(Not to Scale)
R
CLK
SRI
LD
FB
R
CLK
SRI
LD
FB
AD5441
I
OUT
I
TOP VIEW
OUT
GND
(Not to Scale)
GND 4
NOTES
1. THE EXPOSED PAD SHOULD BE
CONNECTED TO THE GROUND PLANE.
Figure 5. 8-Lead LFCSP Pin Configuration
Figure 6. 8-Lead MSOP Pin Configuration
Table 6. Pin Function Descriptions
Pin No.
Mnemonic
Description
1
2
3
4
ꢀ
VREF
RFB
IOUT
GND
LD
DAC Reference Input Pin. Establishes DAC full-scale voltage. Constant input resistance vs. code.
Internal Matching Feedback Resistor. Connect to external op amp output.
DAC Current Output, full-scale output 1 LSB less than reference input voltage −VREF
Analog and Digital Ground.
.
Load Strobe, Level-Sensitive Digital Input. Transfers shift-register data to DAC register while active low.
See Table 3 for operation.
6
7
8
SRI
CLK
VDD
EP
12-Bit Serial Register Input. Data loads directly into the shift register MSB first. Extra leading bits are ignored.
Clock Input. Positive-edge clocks data into shift register.
Positive Power Supply Input. Specified range of operation ꢀ V ± 1±ꢁ.
Exposed Pad. The exposed pad should be connected to the ground plane.
Rev. A | Page 6 of 16
AD5441
TYPICAL PERFORMANCE CHARACTERISTICS
0.5
0.5
0.4
T
V
V
= 25°C
T = 25°C
A
A
V
= 10V
= 10V
REF
0.4
0.3
REF
= 3V
V
= 5V
DD
DD
0.3
0.2
0.2
0.1
0.1
0
0
–0.1
–0.2
–0.3
–0.4
–0.5
–0.1
–0.2
–0.3
–0.4
–0.5
0
500
1000 1500
2000 2500
CODE
3000 3500 4000
0
500
1000 1500
2000 2500
CODE
3000 3500 4000
Figure 7. INL vs. Code, 3 V
Figure 10. INL vs. Code, 5 V
0.5
0.4
0.5
0.4
T
V
V
= 25°C
T
V
V
= 25°C
A
A
= 10V
= 10V
REF
REF
= 5V
DD
= 3V
DD
0.3
0.3
0.2
0.2
0.1
0.1
0
0
–0.1
–0.2
–0.3
–0.4
–0.5
–0.1
–0.2
–0.3
–0.4
–0.5
0
500
1000 1500
2000 2500
CODE
3000 3500 4000
0
500
1000 1500
2000 2500
CODE
3000 3500 4000
Figure 8. DNL vs. Code, 3 V
Figure 11. DNL vs. Code, 5 V
100
0.25
0.20
0.15
0.10
0.05
0
MAX INL
75
50
25
0
–0.05
–0.10
–0.15
–0.20
MIN INL
T
V
= 25°C
A
= 5V
DD
0
1
2
3
4
5
6
7
8
9
10
–1.0
–0.5
0
0.5
1.0
REFERENCE VOLTAGE
TOTAL UNADJUSTED ERROR (LSB)
Figure 12. Total Unadjusted Error Histogram
Figure 9. INL vs. Reference, 5 V
Rev. A | Page 7 of 16
AD5441
4
0.050
0.045
0.040
0.035
0.030
0.025
0.020
0.015
0.010
0.005
0
T
V
V
= 25°C
T
= 25°C
A
A
= 10V
REF
= 5V
DD
OP42
2
0
V
V
= 3V
= 5V
DD
–2
DD
–4
–2000
–20
–60
–40
0
20
40
60
80
100
120
–1000
0
1000
2000
TEMPERATURE (°C)
OP AMP OFFSET, V (µV)
OS
Figure 16. Supply Current vs. Temperature
Figure 13. Integral Nonlinearity Error vs. External Op Amp
50
40
30
20
10
0
1400
1200
1000
800
600
400
200
0
F55
800
FFF
10k
100k
1M
10M
100M
0
1
2
3
FREQUENCY (Hz)
FULL-SCALE TEMPERATURE COEFFICIENT (ppm/°C)
Figure 14. Supply Current vs. Clock Frequency
Figure 17. Full-Scale Output Temperature Coefficient Histogram
5.34
6
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0
LDAC
T
= 25°C
A
5
5.32
5.30
5.28
5.26
5.24
5.22
5.20
5.18
5.16
5.14
5.12
4
3
2
T
V
V
= 25°C
= 10V
A
1
REF
= 5V
DD
0
7FF TO 800
RISING EDGE
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
–0.2
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
TIME (µs)
INPUT VOLTAGE (V)
Figure 15. Supply Current vs. Logic Input Voltage
Figure 18. Midscale Transitions
Rev. A | Page 8 of 16
AD5441
4
–8
100
80
60
40
20
0
ALL BITS
ON
T
V
V
= 25°C
A
= 10V
REF
= 5V
DD
–20
–32
–44
–56
–68
–80
T
= 25°C
A
V
V
= 100mV rms
REF
= 5V
DD
1k
10k
100k
1M
10M
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 20. PSRR vs. Frequency
Figure 19. Reference Multiplying Bandwidth
Rev. A | Page 9 of 16
AD5441
TERMINOLOGY
Digital Feedthrough
Relative Accuracy (INL)
When the device is not selected, high frequency logic activity
on the digital inputs of the device may be capacitively coupled
through the device and produce noise on the IOUT pins. This
noise is coupled from the outputs of the device onto follow-on
circuitry. This noise is digital feedthrough.
Relative accuracy or endpoint nonlinearity is a measure of the
maximum deviation from a straight line passing through the
endpoints of the DAC transfer function. It is measured after
adjusting for zero and full scale and is normally expressed in
LSBs or as a percentage of the full-scale reading.
Multiplying Feedthrough Error
Differential Nonlinearity (DNL)
This is the error due to capacitive feedthrough from the DAC
reference input to the DAC IOUT1 terminal when all 0s are
loaded to the DAC.
DNL is 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 over the operating
temperature range ensures monotonicity.
Total Harmonic Distortion (THD)
The DAC is driven by an ac reference. The ratio of the rms sum
of the harmonics of the DAC output to the fundamental value is
the THD. Usually only the lower order harmonics, such as
second to fifth, are included.
Gain Error
Gain error or full-scale error is a measure of the output error
between an ideal DAC and the actual device output. For these
DACs, ideal maximum output is VREF − 1 LSB. Gain error of the
DACs is adjustable to zero with external resistance.
V22 +V32 +V42 +V52
THD = 20log
Zero Scale Error
Calculated from worst-case RREF
V1
Compliance Voltage Range
The maximum range of (output) terminal voltage for which the
I
ZSE(LSB) = (RREF × ILKG × 4096)/VREF
.
device provides the specified characteristics.
Output Leakage Current
Output leakage current is the current that flows into the DAC
ladder switches when they are turned off. For the IOUT terminal,
it can be measured by loading all 0s to the DAC and measuring
the IOUT current.
Output Noise Spectral Density
Calculation from
en = √4KTRB
where:
Output Capacitance
K is Boltzmann Constant (J/°K).
R is resistance (Ω).
T is the resistor temperature (°K).
B is the 1 Hz bandwidth.
Capacitance from IOUT1 to AGND.
Digital-to-Analog Glitch Impulse
The amount of charge injected from the digital inputs to the
analog output when the inputs change state. This is normally
specified as the area of the glitch in either pA-s or nV-s,
depending on whether the glitch is measured as a current or
voltage signal.
Rev. A | Page 1± of 16
AD5441
PARAMETER DEFINITIONS
During any testing of the resistor ladder or RFEEDBACK (such as
incoming inspection), VDD must be present to turn on these
series switches.
GENERAL CIRCUIT INFORMATION
The AD5441 is a 12-bit multiplying DAC with a low
temperature coefficient. It contains an R-2R resistor ladder
network, data input and control logic, and two data registers.
OUTPUT IMPEDANCE
The output resistance of the AD5441, as in the case of the
output capacitance, varies with the digital input code. This
resistance, looking back into the IOUT terminal, may be between
10 kꢀ (the feedback resistor alone when all digital inputs are
low) and 7.5 kꢀ (the feedback resistor in parallel with approximate
30 kꢀ of the R-2R ladder network resistance when any single bit
logic is high). Static accuracy and dynamic performance are
affected by these variations.
The digital circuitry forms an interface in which serial data can
be loaded under microprocessor control into a 12-bit shift register
and then transferred, in parallel, to the 12-bit DAC register.
The analog portion of the AD5441 contains an inverted R-2R
ladder network consisting of silicon-chrome, highly stable
(50 ppm/°C), thin-film resistors, and 12 pairs of NMOS current-
steering switches, see Figure 21. These switches steer binarily
weighted currents into either IOUT or GND; this yields a constant
current in each ladder leg, regardless of digital input code. This
constant current results in a constant input resistance at VREF
equal to R. The VREF input may be driven by any reference voltage
or current, ac or dc, that is within the limits stated in the
Absolute Maximum Ratings.
APPLICATIONS INFORMATION
In most applications, linearity depends upon the potential of
the IOUT and GND pins being at the same voltage potential. The
DAC is connected to an external precision op amp inverting input.
The external amplifiers noninverting input should be tied directly
to ground without the usual bias current compensating resistor (see
Figure 22 and Figure 24). The selected amplifier should have a low
input bias current and low drift over temperature. The amplifiers
input offset voltage should be nulled to less than 200 mV (less than
10% of 1 LSB). All grounded pins should tie to a single common
ground point to avoid ground loops. The VDD power supply should
have a low noise level with adequate bypassing. It is best to operate
the AD5441 from the analog power supply and grounds.
10kΩ
20kΩ
S1
10kΩ
20kΩ
S2
10kΩ
20kΩ
S3
V
REF
20kΩ
20kΩ
S12
*
GND
I
OUT
10kΩ
R
FEEDBACK
*
BIT 1 (MSB)
BIT 2
BIT 3
BIT 12 (LSB)
DIGITAL INPUTS
UNIPOLAR 2-QUADRANT MULTIPLYING
*THESE SWITCHES PERMANENTLY ON.
The most straightforward application of the AD5441 is in the
2-quadrant multiplying configuration shown in Figure 22. If the
reference input signal is replaced with a fixed dc voltage reference,
the DAC output provides a proportional dc voltage output
according to the transfer equation
NOTES
1. SWITCHES SHOWN FOR DIGITAL INPUTS HIGH.
Figure 21. Simplified DAC Circuit
The 12 output current steering NMOS FET switches are in
series with each R-2R resistor.
V
OUT = −D/4096 × VREF
To further ensure accuracy across the full temperature range,
MOS switches that are always on were included in series with
the feedback resistor and the terminating resistor of the R-2R
ladder. Figure 21 shows the location of the series switches.
where:
D is the decimal data loaded into the DAC register.
V
REF is the externally applied reference voltage source.
V
DD
R2
C1
A1
V
R
DD
FB
I
1
OUT
V
V
REF
REF
LD
AD5441
R1
GND
V
= 0 TO –V
REF
OUT
CLK
SRI
AGND
µCONTROLLER
NOTES
1. R1 AND R2 USED ONLY IF GAIN ADJUSTMENT IS REQUIRED.
2. C1 PHASE COMPENSATION (1pF TO 2pF) MAY BE REQUIRED
IF A1 IS A HIGH SPEED AMPLIFIER.
Figure 22. Unipolar (2-Quadrant) Operation
Rev. A | Page 11 of 16
AD5441
BIPOLAR 4-QUADRANT MULTIPLYING
DIGITAL SECTION
Figure 24 shows a suggested circuit to achieve 4-quadrant
multiplying operation. The summing amplifier multiplies VOUT1
by 2 and offsets the output with the reference voltage so that a
midscale digital input code of 2048 places VOUT2 at 0 V. The negative
full-scale voltage is VREF when the DAC is loaded with all zeros.
The positive full-scale output is −(VREF − 1 LSB) when the DAC
is loaded with all ones. Therefore, the digital coding is offset
binary. The voltage output transfer equation for various input
data and reference (or signal) values follows
LD
, and CLK, are TTL-
The digital inputs of the AD5441, SRI,
compatible. The input voltage levels affect the amount of current
drawn from the supply; peak supply current occurs as the digital
input (VIN) passes through the transition region. See Figure 15
for the supply current vs. logic input voltage graph. Maintaining
the digital input voltage levels as close as possible to the supplies,
V
DD and GND, minimizes supply current consumption. The
digital inputs of the AD5441 were designed with ESD resistance
incorporated through careful layout and the inclusion of input
protection circuitry. Figure 23 shows the input protection diodes
and series resistor; this input structure is duplicated on each
digital input. High voltage static charges applied to the inputs
are shunted to the supply and ground rails through forward-
biased diodes. These protection diodes were designed to clamp
the inputs to well below dangerous levels during static discharge
conditions.
V
OUT2 = (D/2048 − 1) − VREF
where:
D is the decimal data loaded into the DAC register.
V
REF is the externally applied reference voltage source.
INTERFACE LOGIC INFORMATION
The AD5441 has been designed for ease of operation. The
timing diagram in Figure 2 illustrates the input register loading
sequence. Note that the most significant bit (MSB) is loaded
first. Once the 12-bit input register is full, the data is transferred
V
DD
5kΩ
LD, CLK, SRI
LD
to the DAC register by taking
momentarily low.
GND
Figure 23. Digital Input Protection
R3
20kΩ
V
V
DD
R5
20kΩ
R2
C1
R
DD
FB
R4
10kΩ
I
1
OUT
V
±10V
REF
V
A1
REF
LD
AD5441
R1
GND
A2
V
=
–V
REF
TO +V
REF
OUT
CLK
SRI
AGND
µCONTROLLER
NOTES
1. R1 AND R2 ARE USED ONLY IF GAIN ADJUSTMENT IS REQUIRED.
ADJUST R1 FOR V = 0V WITH CODE 10000000 LOADED TO DAC.
OUT
2. MATCHING AND TRACKING IS ESSENTIAL FOR RESISTOR PAIRS
R3 AND R4.
3. C1 PHASE COMPENSATION (1pF TO 2pF) MAY BE REQUIRED
IF A1/A2 IS A HIGH SPEED AMPLIFIER.
Figure 24. Bipolar (4-Quadrant) Operation
Rev. A | Page 12 of 16
AD5441
OUTLINE DIMENSIONS
0.35
0.30
0.25
3.00
BSC SQ
0.65 BSC
8
5
4
PIN 1 INDEX
1.74
1.64
1.49
*
EXPOSED
PAD
AREA
(BOTTOM VIEW)
0.50
0.40
0.30
1
PIN 1
INDICATOR
(R 0.2)
TOP VIEW
2.48
2.38
2.23
0.80 MAX
0.55 NOM
0.80
0.75
0.70
0.05 MAX
0.02 NOM
SEATING
PLANE
0.20 REF
*
FOR PROPER CONNECTION OF THE EXPOSED PAD PLEASE REFER TO
THE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS SECTION
OF THIS DATA SHEET.
Figure 25. 8-Lead Lead Frame Chip Scale Package [LFCSP_WD]
3 mm × 3 mm Body, Very Very Thin, Dual Lead
(CP-8-3)
Dimensions are shown in millimeters
3.20
3.00
2.80
8
1
5
4
5.15
4.90
4.65
3.20
3.00
2.80
PIN 1
0.65 BSC
0.95
0.85
0.75
1.10 MAX
0.80
0.60
0.40
8°
0°
0.15
0.00
0.38
0.22
0.23
0.08
SEATING
PLANE
COPLANARITY
0.10
COMPLIANT TO JEDEC STANDARDS MO-187-AA
Figure 26. 8-Lead Mini Small Outline Package [MSOP]
(RM-8)
Dimensions are shown in millimeters
ORDERING GUIDE
Model1
ADꢀ441BCPZ-R2
ADꢀ441BCPZ-REEL7
ADꢀ441BRMZ
INL (LSB)
±±.ꢀ
±±.ꢀ
±±.ꢀ
±±.ꢀ
Temperature Range
−4±°C to +12ꢀ°C
−4±°C to +12ꢀ°C
−4±°C to +12ꢀ°C
−4±°C to +12ꢀ°C
Package Description
Package Option
CP-8-3
CP-8-3
RM-8
RM-8
Branding
DBD
DBD
DBC
DBC
8-Lead LFCSP_WD
8-Lead LFCSP_WD
8-Lead MSOP
ADꢀ441BRMZ-REEL7
8-Lead MSOP
1 Z = RoHS Compliant Part.
Rev. A | Page 13 of 16
AD5441
NOTES
Rev. A | Page 14 of 16
AD5441
NOTES
Rev. A | Page 1ꢀ of 16
AD5441
NOTES
©2008–2011 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D06492-0-3/11(A)
Rev. A | Page 16 of 16
相关型号：
AD5442ABCPZ-1-RL7
SERIAL INPUT LOADING, 1us SETTLING TIME, 16-BIT DAC, PDSO10, 3 X 3 MM, ROHS COMPLIANT, MO-220WEED, LFCSP-10
ADI
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