Rainbow Electronics MAX5104 User Manual
General Description
The MAX5104 low-power, serial, voltage-output, dual
12-bit digital-to-analog converter (DAC) consumes only
500µA from a single +5V supply. This device features
Rail-to-Rail®output swing and is available in a spacesaving 16-pin QSOP package. To maximize the dynamic
range, the DAC output amplifiers are configured with an
internal gain of +2V/V.
The 3-wire serial interface is SPI™/QSPI™/MICROWIRE™
compatible. Each DAC has a double-buffered input
organized as an input register followed by a DAC register,
which allows the input and DAC registers to be updated
independently or simultaneously with a 16-bit serial
word. Additional features include programmable powerdown (2µA), hardware power-down lockout (PDL), a
separate reference voltage input for each DAC that
accepts AC and DC signals, and an active-low clear
input (CL) that resets all registers and DACs to zero.
These devices provide a programmable logic pin for
added functionality, and a serial-data output pin for
daisy chaining.
________________________Applications
Industrial Process Control
Remote Industrial Controls
Digital Offset and Gain Adjustment
Microprocessor-Controlled Systems
Motion Control
Automatic Test Equipment (ATE)
____________________________Features
♦ 12-Bit Dual DAC with Internal Gain of +2V/V
♦ Rail-to-Rail Output Swing
♦ 12µs Settling Time
♦ +5V Single-Supply Operation
♦ Low Quiescent Current
500µA (normal operation)
2µA (power-down mode)
♦ SPI/QSPI/MICROWIRE Compatible
♦ Space-Saving 16-Pin QSOP Package
♦ Power-On Reset Clears Registers and DACs to Zero
♦ Adjustable Output Offset
MAX5104
Low-Power, Dual, Voltage-Output, 12-Bit DAC
with Serial Interface
________________________________________________________________
Maxim Integrated Products
1
19-1587; Rev 0; 11/99
Ordering Information
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Functional Diagram
Pin Configuration appears at end of data sheet.
PIN-
PACKAGE
TEMP. RANGEPART
16 QSOP
16 QSOP0°C to +70°C
-40°C to +85°CMAX5104EEE
MAX5104CEE
INL
(LSB)
±4
±4
DOUT
REGISTER
CONTROL
16-BIT
SHIFT
SR
DECODE
CONTROL
LOGIC
OUTPUT
DGNDPDLCL
INPUT
REG A
INPUT
REG B
AGND
DAC
REG A
DAC
REG B
V
DD
REFA
DAC A
MAX5104
DAC B
R
R
R
R
OSA
OUTA
OSB
OUTB
UPOH REFB
SCLK
DINCS
MAX5104
Low-Power, Dual, Voltage-Output, 12-Bit DAC
with Serial Interface
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VDD= +5V ±10%, V
REFA
= V
REFB
= +2.048V, RL= 10kΩ, CL= 100pF, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25°C (OS_ connected to AGND for a gain of +2V/V).)
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.
VDDto AGND............................................................-0.3V to +6V
V
DD
to DGND ...........................................................-0.3V to +6V
AGND to DGND..................................................................±0.3V
OSA, OSB to AGND.......................(V
AGND
- 4V) to (VDD+ 0.3V)
REF_, OUT_ to AGND.................................-0.3V to (V
DD
+ 0.3V)
Digital Inputs (SCLK, DIN, CS,
CL, PDL) to DGND...........................................(-0.3V to +6V)
Digital Outputs (DOUT, UPO) to DGND.....-0.3V to (V
DD
+ 0.3V)
Maximum Current into Any Pin.........................................±20mA
Continuous Power Dissipation (TA= +70°C)
16-Pin QSOP (derate 8.30mW/°C above +70°C).......667mW
Operating Temperature Ranges
MAX5104CEE ...................................................0°C to +70°C
MAX5104EEE.................................................-40C° to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C
REFERENCE INPUT
DIGITAL INPUTS
Input Hysteresis V
HYS
200 mV
Input Capacitance C
IN
8 pF
Input Leakage Current I
IN
0.001 ±1 µAVIN= 0 to V
DD
Input Low Voltage V
IL
0.8 V
CL, PDL, CS, DIN, SCLK
Signal-to-Noise plus
Distortion Ratio
SINAD 75 dB
Input code = 1FFE hex,
V
REF_
= 1Vp-p at 1.25VDC, f = 25kHz
PARAMETER
SYMBOL MIN TYP MAX
UNITS
CONDITIONS
Gain Error -0.2 ±8 LSB
Offset Tempco TCV
OS
4 ppm/°C
Offset Error V
OS
±10 mV
Differential Nonlinearity DNL ±1 LSB
Gain-Error Tempco 4 ppm/°C
20 600 µV/V
VDDPower-Supply
Rejection Ratio
PSRR
Integral Nonlinearity
Resolution
12
Bits
INL ±4 LSB
Reference Input Resistance
R
REF
14 20
kΩ
Reference 3dB Bandwidth
300
kHz
Reference Feedthrough
-82 dB
Normalized to 2.048V
Code = 10
Guaranteed monotonic
Normalized to 2.048V
Minimum with code 1554 hex
4.5V ≤ VDD≤ 5.5V
Input code = 1FFE hex,
V
REF_
= 0.67Vp-p at 2.5V
DC
Input code = 0000 hex,
V
REF_
= (VDD- 1.4Vp-p), f = 1kHz
(Note 1)
STATIC PERFORMANCE
Reference Input Range
0V
DD
- 1.4
V
REF
MULTIPLYING-MODE PERFORMANCE
Input High Voltage
V
IH
3 V
CL, PDL, CS, DIN, SCLK
MAX5104
Low-Power, Dual, Voltage-Output, 12-Bit DAC
with Serial Interface
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(VDD= +5V ±10%, V
REFA
= V
REFB
= +2.048V, RL= 10kΩ, CL= 100pF, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25°C (OS_ connected to AGND for a gain of +2V/V).)
Note 1: Accuracy is specified from code 6 to code 4095.
Note 2: Accuracy is better than 1LSB for V
OUT_
greater than 6mV and less than VDD- 50mV. Guaranteed by PSRR test at the
end points.
Note 3: Digital inputs are set to either V
DD
or DGND, code = 0000 hex, RL= ∞.
Note 4: SCLK minimum clock period includes the rise and fall times.
CS = VDD, SCLK = 100kHz, V
SCLK
= 5Vp-p
I
SOURCE
= 2mA
(Note 4)
(Note 3)
(Note 3)
ns
Rail-to-rail (Note 2)
To 1/2LSB of full-scale, V
STEP
= 4V
40
I
SINK
= 2mA
t
CL
SCLK Pulse Width Low
CONDITIONS
ns40t
CH
SCLK Pulse Width High
nVs5Digital Crosstalk
nVs5Digital Feedthrough
µs25Time Required to Exit Shutdown
kΩ24 34R
OS_
OSA or OSB Input Resistance
ns100t
CP
SCLK Clock Period
µA0±1Reference Current in Shutdown
µA210I
DD(SHDN)
Power-Supply Current
in Shutdown
mA0.5 0.65I
DD
Power-Supply Current
V4.5 5.5V
DD
Positive Supply Voltage
ns40t
DS
SDI Setup Time
ns
VVDD- 0.5V
OH
Output High Voltage
0t
CSH
SCLK Rise to CS Rise
Hold Time
ns40t
CSS
CS Fall to SCLK Rise
Setup Time
C
LOAD
= 200pF
V0 to V
DD
Output Voltage Swing
µs15Output Settling Time
C
LOAD
= 200pF
ns80
V0.13 0.40V
OL
Output Low Voltage
V/µs0.75SRVoltage Output Slew Rate
UNITSMIN TYP MAXSYMBOLPARAMETER
t
DO2
SCLK Fall to DOUT
Valid Propagation Delay
ns80t
DO1
SCLK Rise to DOUT
Valid Propagation Delay
ns0t
DH
SDI Hold Time
ns100t
CSW
CS Pulse Width High
ns40t
CS1
CS Rise to SCLK Rise Hold
ns10t
CS0
SCLK Rise to CS Fall Delay
DIGITAL OUTPUTS (DOUT, UPO)
DYNAMIC PERFORMANCE
POWER SUPPLIES
TIMING CHARACTERISTICS
MAX5104
Low-Power, Dual, Voltage-Output, 12-Bit DAC
with Serial Interface
4 _______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
(VDD= +5V, RL= 10kΩ, CL= 100pF, OS_ pins connected to AGND, TA= +25°C, unless otherwise noted.)
-20
-16
-18
-12
-14
-8
-10
-6
-2
-4
0
1 370 740 1110 1480 1850
REFERENCE VOLTAGE INPUT
FREQUENCY RESPONSE
MAX5104 toc01
FREQUENCY (kHz)
RELATIVE OUTPUT (dB)
V
REF
= +0.67Vp-p AT 2.5V
DC
CODE = 1FFE (HEX)
400
450
550
500
650
600
700
-55 5-15-35 4525 65 10585 125
SUPPLY CURRENT vs. TEMPERATURE
MAX5104 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
V
REF
= +2.048V
R
L
= ∞
CODE = 1FFE (HEX)
CODE = 0000 (HEX)
-30
-80
1 10 100
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
-70
MAX5104 toc03
FREQUENCY (kHz)
THD + N (dB)
-60
-50
-40
V
REF
= +1Vp-p AT 2.5V
DC
CODE = 1FFE (HEX)
0
0.1 1 10 100
FULL-SCALE ERROR vs. RESISTIVE LOAD
-1.25
-1.00
-1.50
-0.75
-0.50
-0.25
0.25
0.50
MAX5104 toc04
RL (kΩ)
FULL-SCALE ERROR (LSB)
V
REF
= +2.048V
-100
-80
-90
-60
-70
-40
-50
0.5 1.6 2.7 3.8 4.9 6.0
-30
-10
-20
0
OUTPUT FFT PLOT
MAX5104 toc07
V
REF
= +2.45Vp-p AT 1.225V
DC
f = 1kHz
CODE = 1FFE (HEX)
NOTE: RELATIVE TO FULL SCALE
FREQUENCY (kHz)
RELATIVE OUTPUT (dB)
-150
-130
-140
-110
-120
-90
-100
-80
-60
-70
-50
0.5 1.5 2.0 2.51.0 3.0 3.5 4.0 5.04.5 5.5
REFERENCE FEEDTHROUGH AT 1kHz
MAX5104 toc05
FREQUENCY (kHz)
RELATIVE OUTPUT (dB)
V
REF
= +3.6Vp-p AT 1.88V
DC
CODE = 0000 (HEX)
0
1
2
3
4
5
6
-55 5 25-15-35 45 65 85 105 125
SHUTDOWN CURRENT
vs. TEMPERATURE
MAX5104 toc06
TEMPERATURE (°C)
SHUTDOWN CURRENT (µA)
V
REF
= +1V
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