MAX5385EUT-T [MAXIM]
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23; 低成本，低功耗， 8位DAC，与SOT23 3线串行接口
| 型号： | MAX5385EUT-T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 |
| 文件： | 总12页 (文件大小：342K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1718; Rev 2; 1/02
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire
Serial Interface in SOT23
General Description
Features
The MAX5383/MAX5384/MAX5385 low-cost, 8-bit digital-
to-analog converters (DACs) in miniature 6-pin SOT23
packages have a simple 3-wire, SPI™/QSPI™/
MICROWIRE™-compatible serial interface that operates
up to 10MHz. The MAX5383 has an internal +2V refer-
ence and operates from a +2.7V to +3.6V supply. The
MAX5384 has an internal +4V reference and operates
from a +4.5V to +5.5V supply. The MAX5385 operates
over the full +2.7V to +5.5V supply range and has an
✕
ꢀ 8-Bit Resolution in a Miniature 6-Pin SOT23
Package
ꢀ Wide +2.7V to +5.5V Supply Range (MAX5385)
ꢀ <1µA Shutdown Mode
ꢀ Software-Selectable Output Resistance During
Shutdown
ꢀ Buffered Output Drives Resistive Loads
ꢀ Low-Glitch Power-On Reset to Zero DAC Output
ꢀ 3-Wire SPI/QSPI/MICROWIRE-Compatible Interface
ꢀ < 5ꢀ ꢁull-Scale Error (MAX5385)
internal reference equal to 0.9
V
DD
.
The MAX5383/MAX5384/MAX5385 require an extremely
low supply current of only 150µA (typ) and provide a
buffered voltage output. These devices power up at zero
code and remain there until a new code is written to the
DAC registers. This provides additional safety for appli-
cations that drive valves or other transducers that need
to be off on power-up. The MAX5383/MAX5384/
MAX5385 include a 1µA, low-power shutdown mode that
features software-selectable output loads of 1kΩ, 100kΩ,
or 1MΩ to ground.
ꢀ < 1LSB maꢂ IꢃL/DꢃL
ꢀ Low 230µA (maꢂ) Supply Current
Ordering Information
PIꢃ-
SOT
PART
TEMP RAꢃGE
PACKAGE TOP MARK
Applications
MAX5383EUT-T -40°C to +85°C 6 SOT23
MAX5383EZT-T -40°C to +85°C 6 SOT23-Thin
MAX5384EUT-T -40°C to +85°C 6 SOT23
MAX5384EZT-T -40°C to +85°C 6 SOT23-Thin
MAX5385EUT-T -40°C to +85°C 6 SOT23
MAX5385EZT-T -40°C to +85°C 6 SOT23-Thin
AADF
AAAH
AADH
AAAI
Automatic Tuning (VCO)
Power Amplifier Bias Control
Programmable Threshold Levels
Automatic Gain Control
AADJ
AAAJ
Automatic Offset Adjustment
Selector Guide
PART
IꢃTERꢃAL REꢁEREꢃCE
MAX5383
MAX5384
MAX5385
2V
4V
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
0.9 ✕ V
DD
Typical Operating Circuit
Pin Configuration
+2.7V TO +5.5V
TOP VIEW
OUT
GND
1
2
3
6
5
4
CS
V
DD
MC68XXXX
PCS0
MAX5383
MAX5384
MAX5385
SCLK
DIN
CS
DIN
SCLK
OUT
MAX5385
MOSI
SCK
V
DD
GND
SOT23
________________________________________________________________ Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire
Serial Interface in SOT23
ABSOLUTE MAXIMUM RATIꢃGS
DD
OUT ............................................................-0.3V to (V
CS, SCLK, DIN to GND ............................................-0.3V to +6V
V
to GND..............................................................-0.3V to +6V
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Maximum Junction Temperature .....................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
+ 0.3V)
DD
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (T = +70°C)
A
6-Pin SOT23 (derate 8.7mW/°C above +70°C)..........696mW
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
= +2.7V to +3.6V (MAX5383), V
= +4.5V to +5.5V (MAX5384), V
= +2.7V to +5.5V (MAX5385), R = 10kΩ, C = 50pF,
DD L L
DD
DD
T
= T
to T
, unless otherwise noted. Typical values are T = +25°C.)
A
MIN
MAX A
PARAMETER
SYMBOL
COꢃDITIOꢃS
MIꢃ
TYP
MAX
UꢃITS
STATIC ACCURACY
Resolution
8
Bits
LSB
LSB
mV
Integral Linearity Error
Differential Linearity Error
Offset Error
INL
(Note 1)
1
1
DNL
Guaranteed monotonic
(Note 2)
V
1
25
60
OS
Offset Error Supply Rejection
MAX5385 (Notes 2, 3)
MAX5383/MAX5384
MAX5385
dB
3
1
Offset Error Temperature
Coefficient
ppm/°C
MAX5383/MAX5384
MAX5385
10
5
% of
ideal FS
Full-Scale Error
Code = 255, no load
Code = 255 (Note 4)
Code = 255
Full-Scale Error Supply
Rejection
MAX5383/MAX5384
50
dB
MAX5383/MAX5384
MAX5385
40
10
Full-Scale Error Temperature
Coefficient
ppm/°C
DAC OUTPUT
MAX5383
MAX5384
1.8
3.6
2
4
2.2
4.4
Internal Reference Voltage
(Note 5)
REF
V
0.85 ×
0.9 ×
DD
0.95 ×
MAX5385
V
V
V
DD
DD
Code = 255, 0µA to 100µA
Code = 0, 0µA to 100µA
0.5
0.5
Output Load Regulation
LSB
[D13, D12] = 0, 1
1k
Shutdown Output Resistance
to GND
V
= 0 to V
[D13, D12] = 1, 0
[D13, D12] = 1, 1
100k
1M
Ω
OUT
DD
DYꢃAMIC PERꢁORMAꢃCE
Voltage Output Slew Rate
Output Settling Time
Positive and negative
To 1/2 LSB, 50kΩ and 50pF load (Note 6)
Code = 0, all digital inputs from 0 to V
0.4
20
2
V/µs
µs
Digital Feedthrough
nVs
DD
2
_______________________________________________________________________________________
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire
Serial Interface in SOT23
ELECTRICAL CHARACTERISTICS (continued)
(V
= +2.7V to +3.6V (MAX5383), V
= +4.5V to +5.5V (MAX5384), V
= +2.7V to +5.5V (MAX5385), R = 10kΩ, C = 50pF,
DD L L
DD
DD
T
= T
to T
, unless otherwise noted. Typical values are T = +25°C.)
A
MIN
MAX A
PARAMETER
SYMBOL
COꢃDITIOꢃS
Code 127 to 128
MIꢃ
TYP
MAX
UꢃITS
nVs
Digital-Analog Glitch Impulse
Wake-Up Time
40
50
From software shutdown
µs
POWER REQUIREMEꢃTS
MAX5383
MAX5384
MAX5385
2.7
4.5
2.7
3.6
5.5
5.5
Supply Voltage
Supply Current
V
V
DD
No load, all digital inputs at 0 or V
code = 255
,
DD
150
230
1
I
µA
DD
Shutdown mode
DIGITAL IꢃPUTS
0.3 ×
Input Low Voltage
V
V
V
V
IL
V
DD
0.7 ×
Input High Voltage
Input Hysteresis
V
IH
V
DD
0.05 ×
V
H
V
DD
Input Capacitance
C
(Note 7)
10
pF
IN
Input Leakage Current
I
IN
1
µA
TIMIꢃG CHARACTERISTICS
(Figures 3 and 4, V
= +2.7V to +3.6V (MAX5383), V
= +4.5V to +5.5V (MAX5384), V
= +2.7V to +5.5V (MAX5385),
DD
DD
DD
R = 10kΩ, C = 50pF, T = T
to T
, unless otherwise noted. Typical values are T = +25°C.) (Note 7)
MAX A
L
L
A
MIN
PARAMETER
SYMBOL
COꢃDITIOꢃS
MIꢃ
100
40
TYP
MAX
UꢃITS
ns
SCLK Period
t
CP
SCLK Pulse Width High
SCLK Pulse Width Low
t
ns
CH
t
CL
40
ns
CS Fall to SCLK Rise Setup
Time
t
40
0
ns
ns
CSS
SCLK Rise to CS Rise Hold
Time
t
CSH
DIN Setup Time
t
40
0
ns
ns
ns
DS
DIN Hold Time
t
DH
SCLK Rise to CS Fall Delay
t
10
CS0
_______________________________________________________________________________________
3
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire
Serial Interface in SOT23
TIMIꢃG CHARACTERISTICS (continued)
(Figures 3 and 4, V
= +2.7V to +3.6V (MAX5383), V
= +4.5V to +5.5V (MAX5384), V
= +2.7V to +5.5V (MAX5385),
DD
DD
DD
R = 10kΩ, C = 50pF, T = T
to T
, unless otherwise noted. Typical values are T = +25°C.) (Note 7)
MAX A
L
L
A
MIN
PARAMETER
SYMBOL
COꢃDITIOꢃS
MIꢃ
40
TYP
MAX
UꢃITS
ns
CS Rise to SCLK Rise Hold
CS Pulse Width High
t
CS1
t
100
ns
CSW
ꢃote 1: Guaranteed from code 5 to code 255.
ꢃote 2: The offset value extrapolated from the range over which the INL is guaranteed.
ꢃote 3: MAX5385 tested at 5V 10%.
ꢃote 4: MAX5383 tested at 3V 10%ꢀ MAX5384 tested at 5V 10%.
✕
ꢃote 5: Actual output voltages at full-scale are 255/256
V
REF
.
ꢃote 6: Output settling time is measured by stepping from code 5 to code 255, and from code 255 to code 5.
ꢃote 7: Guaranteed by design.
Typical Operating Characteristics
(V
= +3.0V (MAX5383), V = +5.0V (MAX5384/MAX5385), T = +25°C, unless otherwise noted.)
DD
DD
A
INTEGRAL NONLINEARITY
vs. TEMPERATURE
INTEGRAL NONLINEARITY
vs. SUPPLY VOLTAGE
INTEGRAL NONLINEARITY vs. CODE
0.075
0.050
0.025
0
0
0
-0.05
-0.025
-0.10
-0.15
-0.025
-0.050
-0.075
-0.100
-0.050
-0.20
250
150
-40 -20
0
20
40
60
80
100
0
50
100
200
300
2.5
3.0
3.5
4.0
4.5
5.0
5.5
CODE
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
DIFFERENTIAL NONLINEARITY
vs. TEMPERATURE
DIFFERENTIAL NONLINEARITY
vs. SUPPLY VOLTAGE
DIFFERENTIAL NONLINEARITY vs. CODE
0
0
0.010
0.005
0
-0.005
-0.005
-0.010
-0.015
-0.020
-0.010
-0.015
-0.020
-0.025
-0.005
-0.010
-0.015
-0.020
-0.025
-40 -20
0
20
40
60
80
100
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0
100
200
300
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
CODE
4
_______________________________________________________________________________________
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire
Serial Interface in SOT23
Typical Operating Characteristics (continued)
(V
= +3.0V (MAX5383), V = +5.0V (MAX5384/MAX5385), T = +25°C, unless otherwise noted.)
DD
DD
A
OFFSET ERROR vs. TEMPERATURE
TOTAL UNADJUSTED ERROR vs. CODE
OFFSET ERROR vs. SUPPLY VOLTAGE
0.15
0
0
-0.25
-0.50
0.10
0.05
0
-0.25
-0.05
-0.10
-0.15
-0.50
-0.20
-40 -20
0
20
40
60
80
100
0
100
200
300
2.5
3.0
3.5
4.0
4.5
5.0
5.5
TEMPERATURE (°C)
CODE
SUPPLY VOLTAGE (V)
FULL-SCALE ERROR vs. SUPPLY VOLTAGE
FULL-SCALE ERROR vs. TEMPERATURE
MAX5383/4/5-10
MAX5383/4/5-11
0.75
0.50
0.25
0
1.2
0.75
0.50
0.25
0
1.2
0.8
0.4
0
MAX5384
0.8
0.4
0
MAX5383
MAX5385
MAX5383
MAX5384
MAX5385
-0.25
-0.50
-0.4
-0.8
-0.25
-0.50
-0.4
-0.8
-0.75
-1.2
5.5
-0.75
-1.2
100
2.5
3.0
3.5
4.0
4.5
5.0
-40 -20
0
20
40
60
80
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
SUPPLY CURRENT vs. TEMPERATURE
SUPPLY CURRENT vs. SUPPLY VOLTAGE
160
155
150
145
140
135
200
180
160
NO LOAD
MAX5384
MAX5383
MAX5384
MAX5385
MAX5383
140
120
MAX5385
100
80
60
40
20
130
0
-40 -20
0
20
40
60
80
100
2.5
3.0
3.5
4.0
4.5
5.0
5.5
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
5
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire
Serial Interface in SOT23
Typical Operating Characteristics (continued)
(V
= +3.0V (MAX5383), V = +5.0V (MAX5384/MAX5385), T = +25°C, unless otherwise noted.)
DD
DD
A
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY CURRENT vs. CODE
1.0
0.8
160
155
150
145
140
135
1.0
0.8
MAX5384
V = +5V
MAX5385
= +5V
DD
V
DD
0.6
0.4
0.2
0
0.6
0.4
0.2
V
V
= +5V
= +3V
DD
DD
MAX5383
= +5V
MAX5383
V = +3V
DD
V
DD
130
0
-40 -20
0
20
40
60
80
100
0
32 64 96 128 160 192 224 256
CODE
2.5
3.0
3.5
4.0
4.5
5.0
5.5
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
MAX5383
OUTPUT VOLTAGE
EXITING SHUTDOWN
OUTPUT LOAD REGULATION
OUTPUT VOLTAGE ON POWER-UP
MAX5383/4/5-17
4.5
4.0
3.5
3.0
2.5
2.0
1.5
A
OUT
OUT
50mV/div
500mV/div
B
C
V
DD
0.2
2V/div
D
E
CS
3V/div
0.1
0
0
1
2
3
4
5
6
7
8
9
10
4µs/div
10µs/div
LOAD CURRENT (mA)
SHDN TO 0 x 80
A: MAX5384/MAX5385, V = +4.5V, FULL SCALE OR SOURCING
DD
MAX5383
OUTPUT SETTLING FROM
3/4FS TO 1/4FS
MAX5383
OUTPUT SETTLING FROM
1/4FS TO 3/4FS
B: MAX5383, FULL SCALE, V = +2.7V SINKING, V = +5.0V SOURCING
DD
DD
C: MAX5383, FULL SCALE, V = +2.7V SOURCING
DD
D: ZERO CODE, V = +2.7V SINKING
DD
E: ZERO CODE, V = +5.5V SINKING
DD
OUT
0.5V/div
OUT
0.5V/div
CS
3V/div
CS
3V/div
1µs/div
1µs/div
6
_______________________________________________________________________________________
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire
Serial Interface in SOT23
Typical Operating Characteristics (continued)
(V
= +3.0V (MAX5383), V = +5.0V (MAX5384/MAX5385), T = +25°C, unless otherwise noted.)
DD A
DD
MAX5383
MAX5383
OUTPUT SETTLING
1LSB STEP UP
OUTPUT SETTLING
1LSB STEP DOWN
OUT
20mV/div
AC-COUPLED
OUT
20mV/div
AC-COUPLED
CS
3V/div
CS
3V/div
2µs/div
2µs/div
0 x 7F TO 0 x 80
0 x 80 TO 0 x 7F
Analog Section
Pin Description
The MAX5383/MAX5384/MAX5385 employ a current-
steering DAC topology as shown in Figure 2. At the
core of the DAC is a reference voltage-to-current con-
verter (V/I) that generates a reference current. This cur-
rent is mirrored to 255 equally weighted current
sources. DAC switches control the outputs of these cur-
rent mirrors so that only the desired fraction of the total
current-mirror currents is steered to the DAC output.
The current is then converted to a voltage across a
resistor, and this voltage is buffered by the output
buffer amplifier.
PIꢃ
ꢃAME
OUT
DESCRIPTIOꢃ
1
2
3
4
5
6
DAC Voltage Output
Ground
GND
V
Power-Supply Input
Serial Data Input
Serial Clock Input
Chip-Select Input
DD
DIN
SCLK
CS
Output Voltage
Table 1 shows the relationship between the DAC code
and the analog output voltage. The 8-bit DAC code is
Detailed Description
The MAX5383/MAX5384/MAX5385 voltage-output, 8-bit
DACs ensure monotonic performance by offering full 8-
bit performance with less than 1LSB integral nonlineari-
ty error and less than 1LSB differential nonlinearity
error. The devices use a simple 3-wire, SPI/QSPI/
MICROWIRE-compatible serial interface that operates
up to 10MHz. They include an internal reference, an
output buffer, and three low-current shutdown modes,
making these devices ideal for low-power, highly inte-
grated applications. Figure 1 shows the devices’ func-
tional diagram.
binary unipolar with 1LSB = (V
/256). The MAX5383/
REF
MAX5384 have a full-scale output voltage of (+2V - 1LSB)
and (+4V - 1LSB), set by the internal references. The
✕
MAX5385 has a full-scale output voltage of (0.9
1LSB).
V
DD
-
Output Buffer
The DAC voltage output is an internally buffered unity-
gain follower that slews up to 0.4V/ꢁs. The output can
swing from 0 to full scale. With a 1/4FS to 3/4FS output
transition, the amplifier outputs typically settle to
1/2LSB in less than 5ꢁs when loaded with 10kΩ in par-
allel with 50pF. The buffer amplifiers are stable with any
_______________________________________________________________________________________
7
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire
Serial Interface in SOT23
V
DD
REF
CURRENT-STEERING
DAC
OUT
255
MAX5383
MAX5384
MAX5385
CS
DIN
DATA LATCH
8
CONTROL LOGIC
SCLK
SERIAL INPUT REGISTER
GND
Figure 1. Functional Diagram
combination of resistive loads >10kΩ and capacitive
loads <50pF.
Power-On Reset
V
REF
The MAX5383/MAX5384/MAX5385 have a power-on
reset circuit to set the DAC’s output to 0 when V
is
DD
first applied or when V
dips below 1.7V (typ). This
DD
ensures that unwanted DAC output voltages will not
occur immediately following a system startup, such as
after a loss of power. The output glitch on startup is typ-
ically less than 50mV.
SW1
SW2
SW255
OUT
Shutdown Mode
The MAX5383/MAX5384/MAX5385 include three soft-
ware-controlled shutdown modes that reduce the supply
current to <1ꢁA. All internal circuitry is disabled, and a
known impedance is placed from OUT to GND to
ensure 0V while in shutdown. Table 2 details the three
shutdown modes of operation.
Figure 2. Current-Steering DAC Topology
Table 1. Unipolar Code Output Voltage
Digital Section
OUTPUT VOLTAGE
DAC CODE
3-Wire Serial Interface
The MAX5383/MAX5384/MAX5385s’ digital interface is
a standard 3-wire connection compatible with
SPI/QSPI/MICROWIRE interfaces. The chip-select input
(CS) frames the serial data loading at the data-input pin
(DIN). Immediately following CS’s high-to-low transition,
the data is shifted synchronously and latched into the
input register on the rising edge of the serial clock input
(SCLK). After 16 bits have been loaded into the serial
[D11–D4]
MAX5383
MAX5384
MAX5385
0.9 × V
2V ×
(255/256)
4V ×
(255/256)
×
DD
1111 1111
(255/256)
1000 0000
0000 0001
0000 0000
1V
7.8mV
0
2V
15.6mV
0
0.9 × V / 2
DD
0.9 × V
/ 256
DD
0
8
_______________________________________________________________________________________
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire
Serial Interface in SOT23
input register, it transfers its contents to the DAC latch
on CS’s low-to-high transition (Figure 3). Note that if CS
is not kept low during the entire 16 SCLK cycles, data
will be corrupted. In this case, reload the DAC latch
with a new 16-bit word. The serial clock (SCLK) can
idle either high or low between transitions. Figure 4
shows the complete 3-wire serial interface transmis-
sion. Table 3 lists serial interface mapping.
Digital Inputs and Interface Logic
The digital interface for the 8-bit DAC is based on a
3-wire standard that is compatible with SPI, QSPI, and
MICROWIRE interfaces. The three digital inputs (CS, DIN,
and SCLK) load the digital input serially into the DAC.
All the digital inputs include Schmitt-trigger buffers to
accept slow-transition interfaces. This means that opto-
couplers can interface directly to the MAX5383/
MAX5384/MAX5385 without additional external logic.
The digital inputs are compatible with CMOS logic levels
and can be driven with voltages up to +5.5V regardless
of the supply voltage.
Applications Information
Device Powered by an External Reference
Since the MAX5385 generates an output voltage pro-
portional to V , a noisy power supply will affect the
DD
Power-Supply Bypassing and Layout
Careful PC board layout is important for best system
performance. To reduce crosstalk and noise injection,
keep analog and digital signals separate. To ensure
that the ground return from GND to the supply ground
is short and low impedance, a ground plane is recom-
accuracy of the on-board reference, thereby affecting
the overall accuracy of the DAC. The circuit in Figure 5
rejects this power-supply noise by powering the device
directly with a precision voltage reference, improving
overall system accuracy. The MAX6103 (+3V, 75ppm)
or the MAX6105 (+5V, 75ppm) precision voltage refer-
ences are ideal choices due to the low power require-
ments of the MAX5385. This solution is also useful
when the required full-scale output voltage is different
from the available supply voltages.
mended. Bypass V
with a 0.1ꢁF capacitor to ground
DD
as close as possible to the device. If the supply is
excessively noisy, connect a 10Ω resistor in series with
the supply and V
and add additional capacitance.
DD
Table 2. Shutdown Modes
DAC CODE
MODE
OUTPUT RESISTANCE TO
MAXIMUM SUPPLY
CURRENT (µA)
[D13 AND D12]
GROUND (Ω)
01
10
11
Shutdown
Shutdown
Shutdown
1k
100k
1M
1
1
1
Table 3. Serial Interface Mapping
16-BIT SERIAL WORD
MSB
ANALOG
FUNCTION
LSB
XXXX
XXXX
XXXX
XXXX
OUTPUT
0V
XX00
XX00
XX00
XX00
0000
1111
0000
1000
0000
1111
0001
0000
Normal operation
Normal operation
Normal operation
Normal operation
V
× (255/256)
REF
V
× (1/256)
REF
V
× (128/256)
REF
Shutdown,
1kΩ to GND
XX01
XX10
XXXX
XXXX
XXXX
XXXX
XXXX
XXXX
XXXX
XXXX
XXXX
0V
Shutdown,
100kΩ to GND
0V
0V
Shutdown,
1MΩ to GND
XX11
X = Don’t care
_______________________________________________________________________________________
9
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire
Serial Interface in SOT23
t
CSH
CS
t
CSO
t
CS1
t
t
t
CL
CSS
CH
SCLK
DIN
t
DH
t
DS
D15
D14
D0
Figure 3. 3-Wire Serial Interface Timing Diagram
CS
DAC
UPDATED
SCLK
DIN
D15 D14 D13 D12 D11 D10 D9 D8
D7 D6 D5 D4 D3 D2 D1 D0
Figure 4. Complete 3-Wire Serial Interface Transmission
Chip Information
TRANSISTOR COUNT: 2160
+3.2V TO +12V
IN
+3.00V
MAX6103
OUT
0.1µF
GND
V
DD
0 TO +2.7V
CS
DIN
SCLK
OUT
MAX5385
GND
Figure 5. Powering the MAX5385 with a Precision Voltage
Reference
10 ______________________________________________________________________________________
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire
Serial Interface in SOT23
Package Information
______________________________________________________________________________________ 11
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire
Serial Interface in SOT23
Package Information (continued)
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2002 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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