19-1578; Rev 3; 12/01
Dual, 10-Bit, 40MHz Current/Voltage
Alternate-Phase Output DACs
General Description
The MAX5182 is a dual, 10-bit, alternate-phase-update,
current-output digital-to-analog converter (DAC)
designed for superior performance in systems requiring
analog signal reconstruction with low distortion and
low-power operation. The MAX5185 provides equal
specifications with on-chip output resistors for voltage-
output operation. Both devices are designed for 10pV-s
glitch operation, to reduce distortion and minimize
unwanted spurious signal components at the output. An
on-board +1.2V bandgap circuit provides a well-regu-
lated, low-noise reference that can be disabled for
external reference operation.
The MAX5182/MAX5185 are designed to provide a high
level of signal integrity for the least amount of power dis-
sipation. Both DACs operate from a +2.7V to +3.3V sin-
gle supply. Additionally, these DACs have three modes
of operation: normal, low-power standby, and complete
shutdown. A full shutdown provides the lowest possible
power dissipation with a maximum shutdown current of
1µA. Fast wake-up time (0.5µs) from standby mode to
full DAC operation allows for power conservation by
activating the DACs only when required.
The MAX5182/MAX5185 are available in a 28-pin QSOP
package and are specified for the extended (-40°C to
+85°C) temperature range. For pin-compatible 8-bit
versions, refer to the MAX5188/MAX5191 data sheet.
Features
o
+2.7V to +3.3V Single-Supply Operation
o
Wide Spurious-Free Dynamic Range: 70dB at
f
OUT
= 2.2MHz
o
Fully-Differential Outputs for Each DAC
o
±0.5% FSR Gain Mismatch Between DAC Outputs
o
Low-Current Standby or Full-Shutdown Modes
o
Internal +1.2V Low-Noise Bandgap Reference
o
Small 28-Pin QSOP Package
MAX5182/MAX5185
Ordering Information
PART
MAX5182BEEI
MAX5185BEEI
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
28 QSOP
28 QSOP
Pin Configuration
Applications
Signal Reconstruction
Digital Signal Processing
Arbitrary Waveform Generators (AWGs)
Imaging Applications
CREF1 1
OUT1P 2
OUT1N 3
AGND 4
AV
DD
5
DACEN 6
PD 7
CS 8
CLK 9
N.C. 10
REN 11
D0 12
D1 13
D2 14
28 CREF2
27 OUT2P
26 OUT2N
25 REFO
24 REFR
TOP VIEW
MAX5182
MAX5185
23 DGND
22 DV
DD
21 D9
20 D8
19 D7
18 D6
17 D5
16 D4
15 D3
QSOP
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Dual, 10-Bit, 40MHz Current/Voltage
Alternate-Phase Output DACs
MAX5182/MAX5185
ABSOLUTE MAXIMUM RATINGS
AV
DD
, DV
DD
to AGND, DGND .................................-0.3V to +6V
Digital Inputs to DGND.............................................-0.3V to +6V
OUT1P, OUT1N, OUT2P, OUT2N, CREF1,
CREF2 to AGND ...................................................-0.3V to +6V
V
REF
to AGND ..........................................................-0.3V to +6V
AGND to DGND.....................................................-0.3V to +0.3V
AV
DD
to DV
DD
.................................................................... ±3.3V
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (T
A
= +70°C)
28-Pin QSOP (derate 9.00mW/°C above +70°C)....... 725mW
Operating Temperature Ranges
MAX518_BEEI................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°C
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
(AV
DD
= DV
DD
= +3V ±10%, AGND = DGND = 0, f
CLK
= 40MHz, I
FS
= 1mA, 400Ω differential output, C
L
= 5pF, T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
dB
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
STATIC PERFORMANCE
Resolution
Integral Nonlinearity
Differential Nonlinearity
Zero-Scale Error
Full-Scale Error
DYNAMIC PERFORMANCE
Output Settling Time
Glitch Impulse
Spurious-Free Dynamic Range
to Nyquist
Total Harmonic Distortion to
Nyquist
Signal-to-Noise Ratio to
Nyquist
DAC-to-DAC Ouput Isolation
Clock and Data Feedthrough
Output Noise
Gain Mismatch Between
DAC Outputs
ANALOG OUTPUT
Full-Scale Output Voltage
Voltage Compliance of Output
Output Leakage Current
Full-Scale Output Current
DAC External Output Resistor
Load
I
FS
R
L
DACEN = 0, MAX5182 only
MAX5182 only
MAX5182 only
V
FS
-0.3
-1
0.5
1
400
400
0.8
1
1.5
mV
V
µA
mA
Ω
f
OUT
= 2.2MHz, T
A
= +25°C
SFDR
THD
SNR
f
CLK
= 40MHz
f
CLK
= 40MHz
f
CLK
= 40MHz
f
OUT
= 2.2MHz
All 0s to all 1s
f
OUT
= 550kHz
f
OUT
= 2.2MHz, T
A
= +25°C
f
OUT
= 550kHz
f
OUT
= 2.2MHz, T
A
= +25°C
f
OUT
= 550kHz
f
OUT
= 2.2MHz, T
A
= +25°C
56
57
To ±0.5LSB error band
25
10
72
70
-70
-68
61
59
-60
50
10
±0.5
±1
-63
ns
pVs
dBc
dB
dB
dB
nVs
pA/√Hz
% FSR
N
INL
DNL
Guaranteed monotonic
MAX5182
MAX5185
(Note 1)
10
-2
-1
-2
-8
-40
±15
±0.5
±0.5
+2
+1
+2
+8
+40
Bits
LSB
LSB
LSB
LSB
2
_______________________________________________________________________________________
Dual, 10-Bit, 40MHz Current/Voltage
Alternate-Phase Output DACs
MAX5182/MAX5185
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= +3V ±10%, AGND = DGND = 0, f
CLK
= 40MHz, I
FS
= 1mA, 400Ω differential output, C
L
= 5pF, T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
REFERENCE
Output Voltage Range
Output Voltage Temperature Drift
Reference Output Drive
Capability
Reference Supply Rejection
Current Gain (I
FS
/ I
REF
)
POWER REQUIREMENTS
Analog Power-Supply Voltage
Analog Supply Current
Digital Power-Supply Voltage
Digital Supply Current
Standby Current
Shutdown Current
LOGIC INPUTS AND OUTPUTS
Digital Input Voltage High
Digital Input Voltage Low
Digital Input Current
Digital Input Capacitance
TIMING CHARACTERISTICS
DAC1 DATA to CLK Rise
Setup Time
DAC2 DATA to CLK Fall
Setup Time
DAC1 CLK Rise to DATA
Hold Time
DAC2 CLK Fall to DATA
Hold Time
CS
Fall to CLK Rise Time
CS
Fall to CLK Fall Time
DACEN Rise Time to V
OUT_
PD Fall Time to V
OUT_
Clock Period
Clock High Time
Clock Low Time
t
CLK
t
CH
t
CL
25
10
10
0
t
DS1
t
DS2
t
DH1
t
DH2
10
10
0
0
5
5
0.5
50
ns
ns
ns
ns
ns
ns
µs
µs
ns
ns
ns
V
IH
V
IL
I
IN
C
IN
V
IN
= 0 or DV
DD
10
2
0.8
±1
V
V
µA
pF
AV
DD
I
AVDD
DV
DD
I
DVDD
I
STANDBY
I
SHDN
PD = 0, DACEN = 1, digital inputs at 0
or DV
DD
PD = 0, DACEN = 0, digital inputs at 0
or DV
DD
PD = 1, DACEN = X, digital inputs at 0
or DV
DD
(X = don’t care)
PD = 0, DACEN = 1, digital inputs at 0
or DV
DD
2.7
4.2
1.0
0.5
2.7
2.7
3.3
5.0
3.3
5.0
1.5
1
V
mA
V
mA
mA
µA
V
REF
TCV
REF
I
REFOUT
2.7
1.2
50
10
0.5
8
1.28
V
ppm/°C
µA
mV/V
mA/mA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Note 1:
Excludes reference and reference resistor (MAX5185) tolerance.
_______________________________________________________________________________________
3
Dual, 10-Bit, 40MHz Current/Voltage
Alternate-Phase Output DACs
MAX5182/MAX5185
Typical Operating Characteristics
(AV
DD
= DV
DD
= +3V, AGND = DGND = 0, 400Ω differential output, I
FS
= 1mA, C
L
= 5pF, T
A
= +25°C, unless otherwise noted.)
INTEGRAL NONLINEARITY
vs. INPUT CODE
MAX5182/85-01
DIFFERENTIAL NONLINEARITY
vs. INPUT CODE
MAX5182/85-02
ANALOG SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5182/85-03
0.6
0.5
0.4
0.4
0.3
0.2
DNL (LSB)
0.1
0
-0.1
-0.2
-0.3
3.00
ANALOG SUPPLY CURRENT (mA)
2.75
MAX5185
0.3
INL (LSB)
0.2
0.1
0
-0.1
-0.2
0
128 256 384 512 640 768 896 1024
INPUT CODE
2.50
MAX5182
2.25
2.00
0
128 256 384 512 640 768 896 1024
INPUT CODE
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
ANALOG SUPPLY CURRENT
vs. TEMPERATURE
MAX5182/85-04
DIGITAL SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5182/85-05
DIGITAL SUPPLY CURRENT
vs. TEMPERATURE
MAX5182/85-06
3.00
ANALOG SUPPLY CURRENT (mA)
10
DIGITAL SUPPLY CURRENT (mA)
4.00
DIGITAL SUPPLY CURRENT (mA)
MAX5182
3.75
MAX5185
3.50
2.75
MAX5185
8
6
MAX5182
MAX5185
4
2
2.50
MAX5182
2.25
3.25
2.00
-40
-15
10
35
60
85
TEMPERATURE (°C)
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
3.00
-40
-15
10
35
60
85
TEMPERATURE (°C)
STANDBY CURRENT
vs. SUPPLY VOLTAGE
MAX5182/85-07
MAX5182/MAX5185
STANDBY CURRENT vs. TEMPERATURE
MAX5182/85-08
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
MAX5182/85-09
620
610
STANDBY CURRENT (µA)
MAX5185
600
590
MAX5182
580
570
560
2.5
3.0
3.5
4.0
4.5
5.0
600
MAX5185
STANDBY CURRENT (mA)
590
0.8
SHUTDOWN CURRENT (µA)
0.7
580
0.6
MAX5182
MAX5185
570
MAX5182
560
0.5
550
5.5
-40
-15
10
35
60
85
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
0.4
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
4
_______________________________________________________________________________________
Dual, 10-Bit, 40MHz Current/Voltage
Alternate-Phase Output DACs
MAX5182/MAX5185
Typical Operating Characteristics (continued)
(AV
DD
= DV
DD
= +3V, AGND = DGND = 0, 400Ω differential output, I
FS
= 1mA, C
L
= 5pF, T
A
= +25°C, unless otherwise noted.)
INTERNAL REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
MAX5182/85-11
INTERNAL REFERENCE VOLTAGE
vs. TEMPERATURE
MAX5182/85-12
OUTPUT CURRENT
vs. REFERENCE CURRENT
MAX5182/85-13
1.28
1.28
4
REFERENCE VOLTAGE (V)
REFERENCE VOLTAGE (V)
1.27
1.27
1.26
MAX5182
1.25
MAX5185
1.24
1.26
MAX5182
OUTPUT CURRENT (mA)
3
2
1.25
MAX5185
1.24
1
1.23
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
1.23
-40
-15
10
35
60
85
TEMPERATURE (°C)
0
0
125
250
375
500
REFERENCE CURRENT (µA)
DYNAMIC RESPONSE RISE TIME
MAX5182/85-14
DYNAMIC RESPONSE FALL TIME
MAX5182/85-15
SETTLING TIME
MAX5182/85-16
OUT_P
150mV/
div
OUT_P
150mV/
div
OUT_N
100mV/
div
OUT_N
150mV/
div
OUT_N
150mV/
div
OUT_P
100mV/
div
50ns/div
50ns/div
12.5ns/div
FFT PLOT, DAC1
MAX5181/4toc17
FFT PLOT, DAC2
MAX5182/85-18
SPURIOUS-FREE DYNAMIC RANGE
vs. CLOCK FREQUENCY
MAX5182/85-19
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
0
2
4
6
8
f
OUT
= 2.2MHz
f
CLK
= 40MHz
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
100
90
80
SFDR (dBc)
DAC2
70
60
50
40
DAC1
f
OUT
= 2.2MHz
f
CLK
= 40MHz
(dBc)
(dBc)
10 12 14 16 18 20
0
2
4
6
8
10 12 14 16 18 20
10 15 20 25 30 35 40 45 50 55 60
CLOCK FREQUENCY (MHz)
OUTPUT FREQUENCY (MHz)
OUTPUT FREQUENCY (MHz)
_______________________________________________________________________________________
5
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