max5851 Maxim Integrated Products, Inc., max5851 Datasheet

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max5851

Manufacturer Part Number
max5851
Description
Max5851 Dual, 8-bit, 80msps, Current-output Dac
Manufacturer
Maxim Integrated Products, Inc.
Datasheet

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max5851ETL+
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Maxim Integrated Products
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The MAX5851 dual, 8-bit, 80Msps, digital-to-analog
converter (DAC) provides superior dynamic performance
in wideband communication systems. The device inte-
grates two 8-bit DAC cores, and a 1.24V reference. The
converter supports single-ended and differential modes
of operation. The MAX5851 dynamic performance is
maintained over the entire 2.7V to 3.6V power-supply
operating range. The analog outputs support a -1.0V to
+1.25V compliance voltage.
The MAX5851 can also operate in interleave data mode
to reduce the I/O pin count. This allows the converter to
be updated on a single, 8-bit bus.
The MAX5851 features digital control of channel gain
matching to within ±0.4dB in sixteen 0.05dB steps.
Channel matching improves sideband suppression in
analog quadrature modulation applications. The on-
chip 1.24V bandgap reference includes a control
amplifier that allows external full-scale adjustments of
both channels through a single resistor. The internal ref-
erence can be disabled and an external reference may
be applied for high-accuracy applications.
The MAX5851 features full-scale current outputs of 2mA
to 20mA and operates from a 2.7V to 3.6V single supply.
The DAC supports three modes of power-control opera-
tion: normal, low-power standby, and complete power-
down. In power-down mode, the operating current is
reduced to 1µA.
The MAX5851 is packaged in a 40-pin thin QFN with
exposed paddle (EP) and is specified for the extended
(-40°C to +85°C) temperature range.
Pin-compatible, higher speed, and higher resolution
versions are also available. Refer to the MAX5852
(8 bit, 165Msps), the MAX5854 (10 bit, 165Msps), and
the MAX5853 (10 bit, 80Msps) data sheets for more
information. See Table 4.
19-3231; Rev 0; 4/04
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.
Communications
Wireless Base Stations
Quadrature Modulation
Direct Digital Synthesis (DDS)
Instrumentation/ATE
VSAT, LMDS, MMDS, WLAN,
Point-to-Point Microwave Links
________________________________________________________________ Maxim Integrated Products
Dual, 8-Bit, 80Msps, Current-Output DAC
General Description
Applications
*EP = Exposed paddle.
MAX5851ETL
DA6/DACEN
8-Bit, 80Msps Dual DAC
Low Power
2.7V to 3.6V Single Supply
Full Output Swing and Dynamic Performance at
2.7V Supply
Superior Dynamic Performance
Programmable Channel Gain Matching
Integrated 1.24V Low-Noise Bandgap Reference
Single-Resistor Gain Control
Interleaved Data Mode
Single-Ended and Differential Clock Input Modes
Miniature 40-Pin Thin QFN Package, 6mm x 6mm
EV Kit Available—MAX5852 EV Kit
TOP VIEW
DA4/REN
DA5/IDE
DA7/PD
DA3/G3
DA2/G2
DA1/G1
DA0/G0
58mW with I
66dBc SFDR at f
PART
N.C.
N.C.
10
1
2
3
4
5
6
7
8
9
40
11 12 13 14 15
FS
39
EP
= 2mA at f
38
Ordering Information
-40°C to +85°C
TEMP RANGE
OUT
THIN QFN
37
MAX5851
36
= 20MHz
Pin Configuration
16 17
35
CLK
34
18
33
= 80MHz
32
19 20
PIN-PACKAGE
40 Thin QFN-EP*
31
Features
30
29
28
27
26
25
24
23
22
21
CV
CGND
CLK
CV
CLKXN
CLKXP
DCE
CW
N.C.
N.C.
DD
DD
1

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max5851 Summary of contents

Page 1

... In power-down mode, the operating current is reduced to 1µA. The MAX5851 is packaged in a 40-pin thin QFN with exposed paddle (EP) and is specified for the extended (-40°C to +85°C) temperature range. Pin-compatible, higher speed, and higher resolution versions are also available ...

Page 2

Dual, 8-Bit, 80Msps, Current-Output DAC ABSOLUTE MAXIMUM RATINGS AV to AGND .........................................................-0. DGND.........................................................-0. CGND.........................................................-0. .............................................................- ..........................................................-0.4V to ...

Page 3

Dual, 8-Bit, 80Msps, Current-Output DAC ELECTRICAL CHARACTERISTICS (continued) ( 3V, AGND = DGND = CGND = 20mA, differential output, output amplitude = 0dBFS, T tion test. T < +25°C guaranteed ...

Page 4

Dual, 8-Bit, 80Msps, Current-Output DAC ELECTRICAL CHARACTERISTICS (continued) ( 3V, AGND = DGND = CGND = 20mA, differential output, output amplitude = 0dBFS, T tion test. T < +25°C guaranteed ...

Page 5

Dual, 8-Bit, 80Msps, Current-Output DAC ELECTRICAL CHARACTERISTICS (continued) ( 3V, AGND = DGND = CGND = 20mA, differential output, output amplitude = 0dBFS, T tion test. T < +25°C guaranteed ...

Page 6

Dual, 8-Bit, 80Msps, Current-Output DAC ELECTRICAL CHARACTERISTICS (continued) ( 3V, AGND = DGND = CGND = 20mA, differential output, output amplitude = 0dBFS, T tion test. T < +25°C guaranteed ...

Page 7

Dual, 8-Bit, 80Msps, Current-Output DAC ( 3V, AGND = DGND = CGND = 0, external reference +25°C, unless otherwise noted.) A SPURIOUS-FREE DYNAMIC RANGE vs. OUTPUT FREQUENCY (f = ...

Page 8

Dual, 8-Bit, 80Msps, Current-Output DAC ( 3V, AGND = DGND = CGND = 0, external reference +25°C, unless otherwise noted.) A EIGHT-TONE SFDR PLOT (f = 80MHz, 15MHz WINDOW) ...

Page 9

... REFERENCE VOLTAGE vs. SUPPLY VOLTAGES 1.25160 1.25150 1.25140 1.25130 1.25120 1.25110 2.70 2.85 3.00 3.15 3.30 3.45 3.60 SUPPLY VOLTAGES (V) DYNAMIC RESPONSE FALL TIME MAX5851 toc20 10ns/div = 20mA, differential output, differential clock, POWER DISSIPATION vs. CLOCK FREQUENCY (f = 10MHz 0dBFS) OUT OUT 200 195 190 185 DIFFERENTIAL 180 CLOCK DRIVE 175 ...

Page 10

Dual, 8-Bit, 80Msps, Current-Output DAC PIN NAME 1 DA7/PD Channel A Input Data Bit 7 (MSB)/Power-Down 2 DA6/DACEN Channel A Input Data Bit 6/DAC Enable Control 3 DA5/IDE Channel A Input Data Bit 5/Interleaved Data Enable Channel A Input Data ...

Page 11

... The full-scale output current range is adjustable from 2mA to 20mA to optimize power dissi- OUTPA pation and gain control. OUTNA The MAX5851 accepts an input data and a DAC con- version rate of 80MHz. The inputs are latched on the G0 rising edge of the clock whereas the output latches on G1 the following rising edge ...

Page 12

... The DAC outputs (previous data) are updated simultaneously on the same edge. If the DCE pin is pulled low, the MAX5851 operates in differential clock mode. In this mode, the clock signal has to be applied to differential clock input pins CLKXP/CLKXN. The differential input accepts an input range of ≥0.5V ...

Page 13

... R REFO SET FS is the reference resistor that determines the amplifier out- put current of the MAX5851 (Figure 3). This current is mir- rored into the current-source array where I distributed between matched current segments and summed to valid output current readings for the DACs. ______________________________________________________________________________________ ...

Page 14

Dual, 8-Bit, 80Msps, Current-Output DAC CLKXN CLKXP t CDH CLK OUTPUT DCS DCH DA0–DA7 DACA - 1 DACA OUTNA OUTPA t t DCS DCH DB0–DB7 DACB - 1 DACB OUTNB OUTPB Figure 5. Timing Diagram for Noninterleaved ...

Page 15

... Analog quadrature upcon- verters have a DC common-mode input requirement of typically 0.7V to 1.0V. The MAX5851 differential I/Q out- puts can maintain the desired full-scale level at the required 0.7V to 1.0V DC common-mode level when powered from a single 2.85V (±5%) supply. The ...

Page 16

... Thermal Characteristics and Packaging Thermal Resistance 40-lead thin QFN-EP: θ = 38°C/W JA The MAX5851 is packaged in a 40-pin thin QFN-EP package, providing greater design flexibility, increased thermal efficiency, and optimized AC performance of the DAC. The EP enables the implementation of grounding techniques, which are necessary to ensure highest performance operation. ...

Page 17

... The glitch impulse is found by integrating the voltage of the glitch at the midscale transition over time. The glitch impulse is usu- ally specified in pV-s. Table 4. Part Selection Table Offset Error PART MAX5851 MAX5852 MAX5853 Gain Error MAX5854 TRANSISTOR COUNT: 9035 PROCESS: CMOS / R ...

Page 18

Dual, 8-Bit, 80Msps, Current-Output DAC (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, (The package drawing(s) in this data sheet may not reflect the most current specifications. For ...

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