MAX5186

MAX5186, Elektronika, elementy

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19-1581; Rev 3; 12/01
Dual, 8-Bit, 40MHz, Current/Voltage,
Simultaneous-Output DACs
General Description
The MAX5186 contains two 8-bit, simultaneous-update,
current-output digital-to-analog converters (DACs)
designed for superior performance in communications
systems requiring analog signal reconstruction with low
distortion and low-power operation. The MAX5189 pro-
vides equal specifications, with on-chip precision resis-
tors for voltage output operation. The MAX5186/
MAX5189 are designed for a 10pVs glitch operation to
minimize unwanted spurious signal components at the
output. An on-board +1.2V bandgap circuit provides a
well-regulated, low-noise reference that can be dis-
abled for external reference operation.
The MAX5186/MAX5189 are designed to provide a high
level of signal integrity for the least amount of power dissi-
pation. Both DACs operate from a single supply voltage
of +2.7V to +3.3V. Additionally, these DACs have three
modes of operation: normal, low-power standby, and
complete shutdown, which provides the lowest possible
power dissipation with a 1µA (max) shutdown current. A
fast wake-up time (0.5µs) from standby mode to full DAC
operation allows power conservation by activating the
DACs only when required.
The MAX5186/MAX5189 are packaged in a 28-pin
QSOP and are specified for the extended (-40°C to
+85°C) temperature range. For higher resolution, dual
10-bit versions, refer to the MAX5180/MAX5183 data
sheet.
Features
+2.7V to +3.3V Single-Supply Operation
Wide Spurious-Free Dynamic Range:
70dB at f
OUT
= 2.2MHz
Fully Differential Outputs for Each DAC
±0.5% FSR Gain Mismatch
±0.15° Phase Mismatch
Low-Current Standby or Full Shutdown Modes
Internal +1.2V, Low-Noise Bandgap Reference
Small 28-Pin QSOP Package
Ordering Information
PART
MAX5186
BEEI
MAX5189
BEEI
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
28 QSOP
28 QSOP
Pin Configuration
TOP VIEW
Applications
Signal Reconstruction of I and Q
Transmit Signals
Digital Signal Processing
Arbitrary Waveform Generation (AWG)
Imaging Applications
CREF1
1
28
CREF2
OUT1P
2
27
OUT2P
OUT1N
3
4
26
25
OUT2N
REFO
AGND
AV
DD
5
6
24
23
REFR
DGND
MAX5186
MAX5189
DACEN
PD
7
8
22
21
DV
DD
D7
CS
CLK
9
10
11
20
19
18
D6
D5
D4
N.C.
REN
DGND
12
13
17
16
D3
D2
DGND
D0
14
15
D1
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, 8-Bit, 40MHz, Current/Voltage,
Simultaneous-Output DACs
ABSOLUTE MAXIMUM RATINGS
AV
DD
, DV
DD
to AGND, DGND ................................ -0.3V to +6V
Digital Input 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, 400
Ω
differential output, C
L
= 5pF, T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Resolution
N
8
Bits
Integral Nonlinearity
INL
-1
±0.25
+1
LSB
Differential Nonlinearity
DNL
Guaranteed monotonic
-1
±0.25
+1
LSB
MAX5186
-1
+1
Zero-Scale Error
LSB
MAX5189
-4
+4
Full-Scale Error
(Note 1)
-20
±4
+20
LSB
DYNAMIC PERFORMANCE
Output Settling Time
To ±0.5LSB error band
25
ns
Glitch Impulse
10
pVs
f
OUT
= 550kHz
72
Spurious-Free Dynamic Range
to Nyquist
SFDR
f
CLK
= 40MHz
dBc
f
OUT
= 2.2MHz, T
A
= +25°C
57
70
f
OUT
= 550kHz
-70
Total Harmonic Distortion
to Nyquist
THD
f
CLK
= 40MHz
dB
f
OUT
= 2.2MHz, T
A
= +25°C
-68
-63
f
OUT
= 550kHz
52
Signal-to-Noise-Ratio to Nyquist
SNR
f
CLK
= 40MHz
dB
f
OUT
= 2.2MHz, T
A
= +25°C
46
52
DAC-to-DAC Output Isolation
f
OUT
= 2.2MHz
All 0s to all 1s
-60
dB
Clock and Data Feedthrough
50
nVs
Output Noise
10
pA/
√
Hz
Gain Mismatch Between DAC
Outputs
f
OUT
= 2.2MHz, T
A
= +25°C
±0.5
±1
LSB
Phase Mismatch Between DAC
Outputs
f
OUT
= 2.2MHz
±0.15
degrees
2
_______________________________________________________________________________________
Dual, 8-Bit, 40MHz, Current/Voltage,
Simultaneous-Output DACs
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= +3V ±10%, AGND = DGND = 0, f
CLK
= 40MHz, I
FS
= 1mA, 400
Ω
differential output, C
L
= 5pF, T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ANALOG OUTPUT
Full-Scale Output Voltage
V
FS
400
mV
Voltage Compliance of Output
-0.3
0.8
V
Output Leakage Current
DACEN = 0, MAX5186 only
MAX5186 only
-1
1
µA
Full-Scale Output Current
I
FS
0.5
1
1.5
mA
DAC External Output Resistor
Load
R
L
MAX5186 only
400
Ω
REFERENCE
Output Voltage Range
V
REF
1.12
1.2
1.28
V
Output Voltage Temperature
Drift
TCV
REF
50
ppm/°C
Reference Output Drive
Capability
I
REFOUT
10
µA
Reference Supply Rejection
0.5
mV/V
Current Gain (I
FS
/I
REF
)
8
mA/mA
POWER REQUIREMENTS
Analog Power-Supply Voltage
AV
DD
2.7
3.3
V
Analog Supply Current
IAV
DD
PD = 0, DACEN = 1, digital inputs at 0 or DV
DD
2.7
5.0
mA
Digital Power-Supply Voltage
DV
DD
2.7
3.3
V
Digital Supply Current
IDV
DD
PD = 0, DACEN = 1, digital inputs at 0 or DV
DD
4.2
5.0
mA
Standby Current
I
STANDBY
PD = 0, DACEN = 0, digital inputs at 0 or DV
DD
1.0
1.5
mA
PD = 1, DACEN = X, digital inputs at 0 or DV
DD
(X = don’t care)
Shutdown Current
I
SHDN
0.5
1
µA
LOGIC INPUTS AND OUTPUTS
Digital Input Voltage High
V
IH
2
V
Digital Input Voltage Low
V
IL
0.8
V
Digital Input Current
I
IN
V
IN
= 0 or DV
DD
±1
µA
Digital Input Capacitance
C
IN
10
pF
TIMING CHARACTERISTICS
DAC1 DATA to CLK Rise
Setup Time
t
DS1
10
ns
DAC2 DATA to CLK Fall
Setup Time
t
DS2
10
ns
DAC1 CLK Rise to DATA
Hold Time
t
DH1
0
ns
DAC2 CLK Fall to DATA
Hold Time
t
DH2
0
ns
_______________________________________________________________________________________
3
Dual, 8-Bit, 40MHz, Current/Voltage,
Simultaneous-Output DACs
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= +3V ±10%, AGND = DGND = 0, f
CLK
= 40MHz, I
FS
= 1mA, 400
Ω
differential output, C
L
= 5pF, T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CS Fall to CLK Rise Time
5
ns
CS Fall to CLK Fall Time
5
ns
DACEN Rise Time to V
OUT
0.5
µs
PD Fall Time to V
OUT
50
µs
Clock Period
t
CLK
25
ns
Clock High Time
t
CH
10
ns
Clock Low Time
t
CL
10
ns
Note 1:
Excludes reference and reference resistor (MAX5189) tolerance.
Typical Operating Characteristics
(AV
DD
= DV
DD
= +3V, AGND = DGND = 0, 400
Ω
differential output, I
FS
= 1mA, C
L
= 5pF, T
A
= +25°C, unless otherwise noted.)
ANALOG SUPPLY CURRENT
vs. SUPPLY VOLTAGE
INTEGRAL NONLINEARITY
vs. INPUT CODE
DIFFERENTIAL NONLINEARITY
vs. INPUT CODE
0.150
2.55
0.100
0.125
0.075
2.53
MAX5186
0.100
0.050
MAX5189
0.075
2.51
0.025
0.050
0
2.49
0.025
-0.025
0
2.47
-0.050
-0.025
-0.050
2.45
-0.075
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0
32
64
96
128
160
192
224
256
0
32
64
96
128
160
192
224
256
SUPPLY VOLTAGE (V)
INPUT CODE
INPUT CODE
DIGITAL SUPPLY CURRENT
vs. SUPPLY VOLTAGE
ANALOG SUPPLY CURRENT
vs. TEMPERATURE
DIGITAL SUPPLY CURRENT
vs. TEMPERATURE
4.0
10
5
MAX5189
3.5
8
4
MAX5186
3.0
6
3
MAX5189
MAX5189
MAX5186
2.5
4
2
MAX5186
2.0
2
1
1.5
0
0
-40
-15
10
35
60
85
2.5
3.0
3.5
4.0
4.5
5.0
5.5
-40
-15
10
35
60
85
TEMPERATURE (
°
C)
SUPPLY VOLTAGE (V)
TEMPERATURE (
°
C)
4
_______________________________________________________________________________________
Dual, 8-Bit, 40MHz, Current/Voltage,
Simultaneous-Output DACs
Typical Operating Characteristics (continued)
(AV
DD
= DV
DD
= +3V, AGND = DGND = 0, 400
Ω
differential output, I
FS
= 1mA, C
L
= 5pF, T
A
= +25°C, unless otherwise noted.)
STANDBY CURRENT vs. SUPPLY VOLTAGE
STANDBY CURRENT vs. TEMPERATURE
SHUTDOWN CURRENT vs. SUPPLY VOLTAGE
610
0.80
600
0.75
590
600
MAX5186
0.70
580
MAX5186
MAX5189
590
0.65
570
MAX5186
0.60
580
MAX5189
MAX5189
560
0.55
570
550
0.50
560
540
0.45
2.5
3.0
3.5
4.0
4.5
5.0
5.5
4.0
-40
-15
10
35
60
85
2.5
3.0
3.5
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
OUTPUT CURRENT
vs. REFERENCE CURRENT
INTERNAL REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
INTERNAL REFERENCE VOLTAGE
vs. TEMPERATURE
4
1.28
1.28
1.27
1.27
3
1.26
1.26
2
MAX5189
MAX5189
1.25
1.25
MAX5186
MAX5186
1
1.24
1.24
0
1.23
1.23
300
0
100
200
400
500
2.5
3.0
3.5
4.0
4.5
5.0
5.5
-40
-15
10
35
60
85
REFERENCE CURRENT (
µ
A)
SUPPLY VOLTAGE (V)
TEMPERATURE (
°
C)
DYNAMIC RESPONSE RISE TIME
DYNAMIC RESPONSE FALL TIME
SETTLING TIME
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
_______________________________________________________________________________________
5
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