MAX5851ETL+ Maxim Integrated Products, MAX5851ETL+ Datasheet

IC DAC 8BIT DUAL 80MSPS 40-TQFN

MAX5851ETL+

Manufacturer Part Number
MAX5851ETL+
Description
IC DAC 8BIT DUAL 80MSPS 40-TQFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX5851ETL+

Settling Time
12ns
Number Of Bits
8
Data Interface
Parallel
Number Of Converters
2
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
40-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power Dissipation (max)
-
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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MAX5851ETL+ Summary of contents

Page 1

... Point-to-Point Microwave Links Wireless Base Stations Quadrature Modulation Direct Digital Synthesis (DDS) Instrumentation/ATE ________________________________________________________________ Maxim Integrated Products 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. 8-Bit, 80Msps Dual DAC Low Power 58mW with I 2 ...

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

Dual, 8-Bit, 80Msps, Current-Output DAC ( 3V, AGND = DGND = CGND = 0, external reference +25°C, unless otherwise noted.) A INTEGRAL NONLINEARITY vs. DIGITAL INPUT CODE 0.20 0.15 ...

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

Dual, 8-Bit, 80Msps, Current-Output DAC PIN NAME Full-Scale Current Adjustment. To set the output full-scale current, connect an external resistor R 32 REFR between REFR and AGND. The output full-scale current is equal 33 ...

Page 12

Dual, 8-Bit, 80Msps, Current-Output DAC Table 1. Control Word Format and Function MSB PD DACEN IDE CONTROL WORD PD Power-Down. The part enters power-down mode DACEN DAC Enable. When DACEN = 0 and ...

Page 13

Dual, 8-Bit, 80Msps, Current-Output DAC OPTIONAL EXTERNAL BUFFER FOR HEAVIER LOADS MAX4040 1.24V BANDGAP REFERENCE REFO C * COMP I REF REFR AGND V REF SET REF R SET MAX5851 AGND *COMPENSATION CAPACITOR (C ≈ 100nF) COMP ...

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

Dual, 8-Bit, 80Msps, Current-Output DAC 50Ω OUTPA DA0–DA7 1/2 100Ω MAX5851 8 OUTNA 50Ω 50Ω OUTPB DB0–DB7 1/2 100Ω MAX5851 8 OUTNB 50Ω AGND DGND CGND Figure 7. Application with Output Transformer (Coilcraft TTWB3010-1) ...

Page 16

Dual, 8-Bit, 80Msps, Current-Output DAC power-supply, and ground connections, which can affect dynamic specifications, like signal-to-noise ratio or spurious-free dynamic range. In addition, electro- magnetic interference (EMI) can either couple into or be generated by the MAX5851. Observe the grounding ...

Page 17

Dual, 8-Bit, 80Msps, Current-Output DAC Intermodulation Distortion (IMD) The two-tone IMD is the ratio expressed in dBc of either out- put tone to the worst 3rd-order (or higher) IMD products. Static Performance Parameter Definitions Integral Nonlinearity (INL) Integral nonlinearity (INL) ...

Page 18

... 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. 18 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2004 Maxim Integrated Products D ...

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