MAXIM MAX5851 Technical data

General Description
The MAX5851 dual, 8-bit, 80Msps, digital-to-analog converter (DAC) provides superior dynamic performance in wideband communication systems. The device inte­grates 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 on­chip 1.24V bandgap reference includes a control amplifier that allows external full-scale adjustments of both channels through a single resistor. The internal ref­erence 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 opera­tion: normal, low-power standby, and complete power­down. 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.
Applications
Communications
VSAT, LMDS, MMDS, WLAN,
Point-to-Point Microwave Links Wireless Base Stations Quadrature Modulation Direct Digital Synthesis (DDS) Instrumentation/ATE
Features
8-Bit, 80Msps Dual DACLow Power
58mW with IFS= 2mA at f
CLK
= 80MHz
2.7V to 3.6V Single Supply Full Output Swing and Dynamic Performance at
2.7V Supply
Superior Dynamic Performance
66dBc SFDR at f
OUT
= 20MHz
Programmable Channel Gain MatchingIntegrated 1.24V Low-Noise Bandgap ReferenceSingle-Resistor Gain ControlInterleaved Data ModeSingle-Ended and Differential Clock Input ModesMiniature 40-Pin Thin QFN Package, 6mm x 6mmEV Kit Available—MAX5852 EV Kit
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
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.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX5851ETL -40°C to +85°C
40 Thin QFN-EP*
40 36373839
EP
18
21
23 22
24
25
19 2016 17
6
5
4
3
2
1
7 8 9
10
11
12
13
14
15
26
27
28
29
30
3132
33
3435
N.C.
DB6
AGND
MAX5851
THIN QFN
TOP VIEW
AVDDOUTPA
OUTNA
AGND
OUTPB
OUTNB
AV
DD
REFR
REFO
DB7
DB4
DB5
DV
DD
DB3
DB2
DGND
DB0
DB1
CV
DD
CGND CLK CV
DD
CLKXN CLKXP DCE CW N.C. N.C.
N.C.
DA0/G0
DA1/G1
DA2/G2
DA3/G3
DA4/REN
DA5/IDE
DA6/DACEN
DA7/PD
Pin Configuration
*EP = Exposed paddle.
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(AVDD= DVDD= CVDD= 3V, AGND = DGND = CGND = 0, f
DAC
= 80Msps, differential clock, external reference, V
REF
= 1.2V, IFS=
20mA, differential output, output amplitude = 0dBFS, T
A
= T
MIN
to T
MAX
, unless otherwise noted. TA ≥ +25°C, guaranteed by produc-
tion test. T
A
< +25°C guaranteed by design and characterization. Typical values are at TA= +25°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.
AVDDto AGND .........................................................-0.3V to +4V
DV
DD
to DGND.........................................................-0.3V to +4V
CV
DD
to CGND.........................................................-0.3V to +4V
AV
DD
to DVDD.............................................................-4V to +4V
AV
DD
to CVDD..........................................................-0.4V to +4V
DV
DD
to CVDD..........................................................-0.4V to +4V
AGND to DGND.....................................................-0.3V to +0.3V
AGND to CGND.....................................................-0.3V to +0.3V
DGND to CGND ....................................................-0.3V to +0.3V
DA7–DA0, DB7–DB0,
CW, DCE to DGND ...............-0.3V to +4V
CLK to CGND ..........................................-0.3V to (CV
DD
+ 0.3V)
CLKXN, CLKXP to CGND.........................................-0.3V to +4V
REFR, REFO to AGND .............................-0.3V to (AV
DD
+ 0.3V)
OUTPA, OUTNA to AGND..........(AV
DD
- 4.8V) to (AVDD+ 0.3V)
OUTPB, OUTNB to AGND..........(AV
DD
- 4.8V) to (AVDD+ 0.3V)
Maximum Current into Any Pin
(excluding power supplies)..........................................±50mA
Continuous Power Dissipation (T
A
= +70°C)
40-Pin Thin QFN (derate 26.3mW/°C above +70°C)....2105mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
STATIC PERFORMANCE
Resolution N 8 Bits Integral Nonlinearity INL RL = 0
LSB
Differential Nonlinearity DNL Guaranteed monotonic, RL = 0
LSB
Offset Error V
OS
LSB
Internal reference (Note1) -10
+8
Gain Error (See Also Gain Error Definition Section)
GE
External reference
%FSR
Internal reference
Gain-Error Temperature Drift
External reference
ppm/°C
DYNAMIC PERFORMANCE
f
OUT
= 10MHz
f
OUT
= 20MHz 66
f
CLK
= 80MHz,
A
OUT
= -1dBFS
f
OUT
= 30MHz 65
f
CLK
= 44MHz,
A
OUT
= -1dBFS
f
OUT
= 10MHz 63
Spurious-Free Dynamic Range to Nyquist
SFDR
f
CLK
= 25MHz,
A
OUT
= -1dBFS
f
OUT
= 1MHz 64
dBc
f
CLK
= 80MHz, f
OUT
= 10MHz,
A
OUT
= -1dBFS, span = 10MHz
70
f
CLK
= 65MHz, f
OUT
= 5MHz,
A
OUT
= -1dBFS, span = 2.5MHz
68
Spurious-Free Dynamic Range Within a Window
SFDR
f
CLK
= 25MHz, f
OUT
= 1MHz,
A
OUT
= -1dBFS, span = 2MHz
67
dBc
Multitone Power Ratio to Nyquist
MTPR
8 tones at 400kHz spacing, f
CLK
= 78MHz,
f
OUT
= 15MHz to 18.2MHz
63 dBc
-0.25 ±0.05 +0.25
-0.15 ±0.05 +0.15
-0.1 ±0.2 +0.1 ±1.5
-5.5 ±0.7 +5.0
±150 ±100
63.3 66.5
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(AVDD= DVDD= CVDD= 3V, AGND = DGND = CGND = 0, f
DAC
= 80Msps, differential clock, external reference, V
REF
= 1.2V, IFS=
20mA, differential output, output amplitude = 0dBFS, T
A
= T
MIN
to T
MAX
, unless otherwise noted. TA ≥ +25°C, guaranteed by produc-
tion test. T
A
< +25°C guaranteed by design and characterization. Typical values are at TA= +25°C.)
PARAMETER
CONDITIONS
UNITS
Multitone Spurious-Free Dynamic Range Within a Window
8 tones at 811kH z sp aci ng , f
C LK
= 80M H z,
61 dBc
f
OUT
= 10MHz -72
f
OUT
= 20MHz -74
f
CLK
= 80MHz,
A
OUT
= -1dBFS
f
OUT
= 30MHz -69
f
CLK
= 44MHz,
A
OUT
= -1dBFS
f
OUT
= 10MHz -73
Total Harmonic Distortion to Nyquist (2nd- Through 8th-Order Harmonics Included)
THD
f
CLK
= 25MHz,
A
OUT
= -1dBFS
f
OUT
= 1MHz -69
dBc
Output Channel-to-Channel Isolation
f
OUT
= 10MHz 90 dB
Channel-to-Channel Gain Mismatch
f
OUT
= 10MHz, G[3:0] = 1000
dB
Channel-to-Channel Phase Mismatch
f
OUT
= 10MHz
Degrees
f
CLK
= 80MHz, f
OUT
= 5MHz, I
FS
= 20mA 51
Signal-to-Noise Ratio to Nyquist SNR
f
CLK
= 80MHz, f
OUT
= 5MHz, I
FS
= 5mA
dB
Interleaved mode disabled, IDE = 0 80
Maximum DAC Conversion Rate
f
DAC
Interleaved mode enabled, IDE = 1 80
Msps
Glitch Impulse 5
pV•s
Output Settling Time t
S
To ±0.1% error band (Note 3) 12 ns Output Rise Time 10% to 90% (Note 3) 2.2 ns Output Fall Time 90% to 10% (Note 3) 2.2 ns
ANALOG OUTPUT
Full-Scale Output Current Range
I
FS
220mA
Output Voltage Compliance Range
V
Output Leakage Current Shutdown or standby mode -5 +5 µA
REFERENCE
Internal-Reference Output Voltage
V
REFO
REN = 0
V
Internal-Reference Supply Rejection
AV
DD
varied from 2.7V to 3.6V 0.5
mV/V
Internal-Reference Output­Voltage Temperature Drift
REN = 0
ppm/°C
SYMBOL
f
OU T
TCV
REFO
= 10.8M H z to 17.2M H z, sp an = 15M H z
MIN TYP MAX
0.025
0.05
50.3
-1.00 +1.25
1.13 1.24 1.32
±50
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(AVDD= DVDD= CVDD= 3V, AGND = DGND = CGND = 0, f
DAC
= 80Msps, differential clock, external reference, V
REF
= 1.2V, IFS=
20mA, differential output, output amplitude = 0dBFS, T
A
= T
MIN
to T
MAX
, unless otherwise noted. TA ≥ +25°C, guaranteed by produc-
tion test. T
A
< +25°C guaranteed by design and characterization. Typical values are at TA= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Internal-Reference Output Drive Capability
REN = 0 50 µA
External-Reference Input Voltage Range
REN = 1
1.2
V
Current Gain
32
mA/mA
LOGIC INPUTS (DA7–DA0, DB7–DB0, CW)
Digital Input-Voltage High V
IH
V
Digital Input-Voltage Low V
IL
0.3 x V
Digital Input Current I
IN
-1 +1 µA
Digital Input Capacitance C
IN
3pF
SINGLE-ENDED CLOCK INPUT/OUTPUT AND DCE INPUT (CLK, DCE)
Digital Input-Voltage High V
IH
DCE = 1
0.65 x V
Digital Input-Voltage Low V
IL
DCE = 1
0.3 x V
Digital Input Current I
IN
DCE = 1 -1 +1 µA
Digital Input Capacitance C
IN
DCE = 1 3 pF
Digital Output-Voltage High V
OH
DCE = 0, I
SOURCE
= 0.5mA, Figure 1
V
Digital Output-Voltage Low V
OL
DCE = 0, I
SINK
= 0.5mA, Figure 1
V
DIFFERENTIAL CLOCK INPUTS (CLKXP/CLKXN) Differential Clock Input Internal
Bias
CV
DD
/ 2 V
Differential Clock Input Swing 0.5 V Clock Input Impedance Measured single ended 5 k
POWER REQUIREMENTS
Analog Power-Supply Voltage AV
DD
2.7 3 3.6 V
Digital Power-Supply Voltage DV
DD
2.7 3 3.6 V
Clock Power-Supply Voltage CV
DD
2.7 3 3.6 V
I
FS
= 20mA, single-ended clock mode 43 46
I
FS
= 20mA, differential clock mode 43
I
FS
= 2mA, single-ended clock mode 5
Analog Supply Current (Note 2) I
AVDD
I
FS
= 2mA, differential clock mode 5
mA
IFS/I
REF
0.10
0.65 x DV
DD
CV
DD
0.9 x
CV
DD
1.32
DV
CV
0.1 x
CV
DD
DD
DD
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(AVDD= DVDD= CVDD= 3V, AGND = DGND = CGND = 0, f
DAC
= 80Msps, differential clock, external reference, V
REF
= 1.2V, IFS=
20mA, differential output, output amplitude = 0dBFS, T
A
= T
MIN
to T
MAX
, unless otherwise noted. TA ≥ +25°C, guaranteed by produc-
tion test. T
A
< +25°C guaranteed by design and characterization. Typical values are at TA= +25°C.)
PARAMETER
CONDITIONS
UNITS
I
FS
= 20mA, single-ended clock mode 3 3.8
Digital Supply Current (Note 2) I
DVDD
I
FS
= 20mA, differential clock mode 3
mA
Single-ended clock mode (DCE = 1)
Clock Supply Current (Note 2) I
CVDD
Differential clock mode (DCE = 0)
mA
Total Standby Current
I
AVDD
+ I
DVDD
+ I
CVDD
3.1 3.7 mA
Total Shutdown Current I
SHDNIAVDD
+ I
DVDD
+ I
CVDD
A
I
FS
= 20mA
190
Single-ended clock mode (DCE = 1)
I
FS
= 2mA 58
I
FS
= 20mA
Differential clock mode (DCE = 0)
I
FS
= 2mA 74
Standby 9.3
Total Power Dissipation (Note 2)
P
TOT
Shutdown
mW
TIMING CHARACTERISTICS (Figures 5 and 6)
Propagation Delay 1
Clock
cycles
Single-ended clock mode (DCE = 1) 1.2
DAC Data to CLK Rise/Fall Setup Time (Note 4)
t
DCS
Differential clock mode (DCE = 0) 2.7
ns
Single-ended clock mode (DCE = 1) 0.8
DAC Data to CLK Rise/Fall Hold Time (Note 4)
t
DCH
Differential clock mode (DCE = 0)
ns
Control Word to CW Rise Setup Time
t
CS
2.5 ns
Control Word to CW Rise Hold Time
t
CW
2.5 ns
CW High Time t
CWH
5ns
CW Low Time t
CWL
5ns
SYMBOL
I
STANDBY
MIN TYP MAX
11.2 13.5
16.5
172
188
11.1
0.003
-0.5
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(AVDD= DVDD= CVDD= 3V, AGND = DGND = CGND = 0, f
DAC
= 80Msps, differential clock, external reference, V
REF
= 1.2V, IFS=
20mA, differential output, output amplitude = 0dBFS, T
A
= T
MIN
to T
MAX
, unless otherwise noted. TA ≥ +25°C, guaranteed by produc-
tion test. T
A
< +25°C guaranteed by design and characterization. Typical values are at TA= +25°C.)
PARAMETER
CONDITIONS
UNITS
DACEN = 1 to V
OUT
Stable Time
(Coming Out of Standby)
t
STB
s
PD = 0 to V
OUT
Stable Time
(Coming Out of Power-Down)
t
SHDN
µs
Maximum Clock Frequency at CLKXP/CLKXN Input
f
CLK
80
MHz
Clock High Time t
CXH
CLKXP or CLKXN input 3 ns
Clock Low Time t
CXL
CLKXP or CLKXN input 3 ns
CLKXP Rise to CLK Output Rise Delay
t
CDH
DCE = 0 2.7 ns
CLKXP Fall to CLK Output Fall Delay
t
CDL
DCE = 0 2.7 ns
Note 1: Including the internal reference voltage tolerance and reference amplifier offset. Note 2: f
DAC
= 80Msps, f
OUT
= 10MHz.
Note 3: Measured single ended with 50load and complementary output connected to ground. Note 4: Guaranteed by design, not production tested.
TO OUTPUT
PIN
5pF
0.5mA
0.5mA
1.6V
Figure 1. Load Test Circuit for CLK Outputs
SYMBOL
MIN TYP MAX
500
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
_______________________________________________________________________________________ 7
SPURIOUS-FREE DYNAMIC RANGE
vs. OUTPUT FREQUENCY (f
CLK
= 80MHz)
MAX5851 toc01
f
OUT
(MHz)
SFDR (dBc)
353020 2510 155
35
40
45
50
55
60
65
70
75
80
30
040
0dBFS
-6dBFS
-12dBFS
SPURIOUS-FREE DYNAMIC RANGE
vs. OUTPUT FREQUENCY (f
CLK
= 65MHz)
MAX5851 toc02
f
OUT
(MHz)
SFDR (dBc)
302515 20105
35
40
45
50
55
60
65
70
75
80
30
035
0dBFS
-6dBFS
-12dBFS
SPURIOUS-FREE DYNAMIC RANGE
vs. OUTPUT FREQUENCY (f
CLK
= 44MHz)
MAX5851 toc03
f
OUT
(MHz)
SFDR (dBc)
201814 164 6 8 10 122
35
40
45
50
55
60
65
70
75
80
30
022
0dBFS
-6dBFS
-12dBFS
SPURIOUS-FREE DYNAMIC RANGE
vs. OUTPUT FREQUENCY (f
CLK
= 25MHz)
MAX5851 toc04
f
OUT
(MHz)
SFDR (dBc)
12106 842
35
40
45
50
55
60
65
70
75
80
30
014
0dBFS
-6dBFS
-12dBFS
SPURIOUS-FREE DYNAMIC RANGE
vs. OUTPUT FREQUENCY (f
CLK
= 80MHz)
MAX5851 toc05
f
OUT
(MHz)
SFDR (dBc)
353020 2510 155
35
40
45
50
55
60
65
70
75
80
30
040
IFS = 20mA
IFS = 5mA
IFS = 10mA
SPURIOUS-FREE DYNAMIC RANGE
vs. OUTPUT FREQUENCY (f
CLK
= 80MHz)
MAX5851 toc06
f
OUT
(MHz)
SFDR (dBc)
363224 288 12 16 204
35
40
45
50
55
60
65
70
75
80
30
040
AVDD = DVDD = CVDD = 2.7V
AVDD = DVDD = CVDD = 3.6V
AVDD = DVDD = CVDD = 3.3V
AVDD = DVDD = CVDD = 3V
SPURIOUS-FREE DYNAMIC RANGE vs. TEMPERATURE (f
CLK
= 80MHz)
MAX5851 toc07
TEMPERATURE (°C)
SFDR (dBc)
603510-15
35
40
45
50
55
60
65
70
75
80
30
-40 85
Typical Operating Characteristics
(AVDD= DVDD= CVDD= 3V, AGND = DGND = CGND = 0, external reference, IFS= 20mA, differential output, differential clock, TA= +25°C, unless otherwise noted.)
TWO-TONE INTERMODULATION DISTORTION
(f
CLK
= 80MHz, 2.5MHz WINDOW)
MAX5851 toc08
f
OUT
(MHz)
AMPLITUDE (dBm)
5.85.34.84.3
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
3.8 6.3
f
OUT1
= 4.904MHz
f
OUT2
= 5.021MHz
f
OUT2
f
OUT1
2f
OUT1
- f
OUT2
2f
OUT2
- f
OUT1
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
8 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(AVDD= DVDD= CVDD= 3V, AGND = DGND = CGND = 0, external reference, IFS= 20mA, differential output, differential clock, TA= +25°C, unless otherwise noted.)
SINGLE-TONE SFDR
(f
CLK
= 80MHz, 10MHz WINDOW)
MAX5851 toc10a
f
OUT
(MHz)
AMPLITUDE (dBm)
141311 12789106
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100 515
f
OUT
= 9.941MHz
A
OUT
= -1dBFS
SINGLE-TONE SFDR
(f
CLK
= 80MHz, NYQUIST WINDOW)
MAX5851 toc10b
f
OUT
(MHz)
AMPLITUDE (dBm)
4MHz/div
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-120 040
f
OUT
= 9.9359MHz
A
OUT
= -1dBFS
SINGLE-TONE SFDR
(f
CLK
= 25MHz, 2MHz WINDOW)
MAX5851 toc12
f
OUT
(MHz)
AMPLITUDE (dBm)
1.91.61.1 1.40.6 0.90.4
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
0.1 2.1
f
OUT
= 0.9949MHz
A
OUT
= -1dBFS
SINGLE-TONE SFDR
(f
CLK
= 44MHz, 2.5MHz WINDOW)
MAX5851 toc11
f
OUT
(MHz)
AMPLITUDE (dBm)
5.85.34.84.3
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
3.8 6.3
f
OUT
= 4.9736MHz
A
OUT
= -1dBFS
EIGHT-TONE SFDR PLOT
(f
CLK
= 80MHz, 15MHz WINDOW)
MAX5851 toc09
f
OUT
(MHz)
AMPLITUDE (dBm)
18.515.512.59.5
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
6.5 21.5
f
T4
f
T3
f
T2
f
T1
f
T5
f
T6
f
T7
f
T8
fT1 = 10.6836MHz f
T2
= 11.5820MHz
f
T3
= 12.3292MHz
f
T4
= 13.2227MHz
f
T5
= 14.8633MHz
f
T6
= 15.5664MHz
f
T7
= 16.3867MHz
f
T8
= 17.2461MHz
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
_______________________________________________________________________________________ 9
REFERENCE VOLTAGE
vs. TEMPERATURE
MAX5851 toc18
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
603510-15
1.242
1.244
1.246
1.248
1.250
1.252
1.254
1.256
1.258
1.260
1.240
-40 85
DYNAMIC RESPONSE RISE TIME
MAX5851 toc19
10ns/div
100mV/div
DYNAMIC RESPONSE FALL TIME
MAX5851 toc20
10ns/div
100mV/div
SPURIOUS-FREE DYNAMIC RANGE
vs. OUTPUT FREQUENCY (f
CLK
= 80MHz)
MAX5851 toc21
f
OUT
(MHz)
SFDR (dBc)
353020 2510 155
35
40
45
50
55
60
65
70
75
80
30
040
0dBFS
-6dBFS
-12dBFS
SINGLE-ENDED CLOCK DRIVE
Typical Operating Characteristics (continued)
(AVDD= DVDD= CVDD= 3V, AGND = DGND = CGND = 0, external reference, IFS= 20mA, differential output, differential clock, TA= +25°C, unless otherwise noted.)
INTEGRAL NONLINEARITY
vs. DIGITAL INPUT CODE
MAX5851 toc13
DIGITAL INPUT CODE
INL (LSB)
22419232 64 96 128 160
-0.15
-0.10
-0.05
0
0.05
0.10
0.15
0.20
-0.20 0 256
DIFFERENTIAL NONLINEARITY
vs. DIGITAL INPUT CODE
MAX5851 toc14
DIGITAL INPUT CODE
DNL (LSB)
22419232 64 96 128 160
-0.08
-0.05
-0.03
0
0.03
0.05
0.08
0.10
-0.10 0 256
POWER DISSIPATION vs. CLOCK FREQUENCY
(f
OUT
= 10MHz, A
OUT
= 0dBFS)
MAX5815 toc15
f
CLK
(MHz)
POWER DISSIPATION (mW)
7060504030
155
160
165
170
175
180
185
190
195
200
150
20 80
DIFFERENTIAL
CLOCK DRIVE
SINGLE-ENDED CLOCK DRIVE
POWER DISSIPATION vs. SUPPLY VOLTAGES
(f
CLK
= 80MHz, f
OUT
= 10MHz)
MAX5851 toc16
SUPPLY VOLTAGES (V)
POWER DISSIPATION (mW)
3.453.303.153.002.85
160
170
180
190
200
210
220
150
2.70 3.60
DIFFERENTIAL
CLOCK DRIVE
SINGLE-ENDED CLOCK DRIVE
REFERENCE VOLTAGE
vs. SUPPLY VOLTAGES
MAX5851 toc17
SUPPLY VOLTAGES (V)
REFERENCE VOLTAGE (V)
3.453.303.153.002.85
1.25120
1.25130
1.25140
1.25150
1.25160
1.25110
2.70 3.60
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
10 ______________________________________________________________________________________
Pin Description
PIN NAME FUNCTION
1 DA7/PD Channel A Input Data Bit 7 (MSB)/Power-Down 2
Channel A Input Data Bit 6/DAC Enable Control
3 DA5/IDE Channel A Input Data Bit 5/Interleaved Data Enable
4
Channel A Input Data Bit 4/Reference Enable. Setting REN = 0 enables the internal reference. Setting REN = 1 disables the internal reference.
5 DA3/G3 Channel A Input Data Bit 3/Channel A Gain Adjustment Bit 3 6 DA2/G2 Channel A Input Data Bit 2/Channel A Gain Adjustment Bit 2 7 DA1/G1 Channel A Input Data Bit 1/Channel A Gain Adjustment Bit 1 8 DA0/G0 Channel A Input Data Bit 0 (LSB)/Channel A Gain Adjustment Bit 0
9, 10,
21, 22
N.C. No Connection. Do not connect to these pins.
11 DB7 Channel B Input Data Bit 7 (MSB) 12 DB6 Channel B Input Data Bit 6 13 DB5 Channel B Input Data Bit 5 14 DB4 Channel B Input Data Bit 4 15 DB3 Channel B Input Data Bit 3 16 DV
DD
D i g i tal P ow er Inp ut. S ee the P ow er S up p l i es, Byp assi ng , D ecoup l i ng , and Layout secti on for m or e d etai l s. 17 DGND Digital Ground 18 DB2 Channel B Input Data Bit 2 19 DB1 Channel B Input Data Bit 1 20 DB0 Channel B Input Data Bit 0 (LSB) 23 CW Active-Low Control Word Write Pulse. The control word is latched on the rising edge of CW.
24 DCE
Active-Low Differential Clock Enable Input. Drive DCE low to enable differential clock inputs
CLKXP and CLKXN. Drive DCE high to disable the differential clock inputs and enable the single-
ended CLK input.
25 CLKXP
Positive Differential Clock Input. With DCE = 0, CLKXP and CLKXN are enabled. With DCE = 1, CLKXP
and CLKXN are disabled. Connect CLKXP to CGND when the differential clock is disabled.
26 CLKXN
Negative Differential Clock Input. With DCE = 0, CLKXP and CLKXN are enabled. With DCE = 1, CLKXP
and CLKXN are disabled. Connect CLKXN to CV
DD
when the differential clock is disabled.
27, 30 CV
DD
C l ock P ow er Inp ut. S ee the P ow er S up p l i es, Byp assi ng , D ecoup l i ng , and Layout secti on for m or e d etai l s.
28 CLK
Single-Ended Clock Input/Output. With the differential clock disabled (DCE = 1), CLK becomes a
single-ended conversion clock input. With the differential clock enabled (DCE = 0), CLK is a single-
ended output that mirrors differential clock inputs CLKXP and CLKXN. See the Clock Modes section for
more information on CLK. 29 CGND Clock Ground
31 REFO
Reference Input/Output. REFO serves as a reference input when the internal reference is disabled. If the
internal 1.24V reference is enabled, REFO serves as an output for the internal reference. When the
internal reference is enabled, bypass REFO to AGND with a 0.1µF capacitor.
DA6/DACEN
DA4/REN
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
______________________________________________________________________________________ 11
Detailed Description
The MAX5851 dual, high-speed, 8-bit, current-output DAC provides superior performance in communication systems requiring low-distortion analog-signal recon­struction. The MAX5851 combines two DACs and an on­chip 1.24V reference (Figure 2). The current outputs of the DACs can be configured for differential or single­ended operation. The full-scale output current range is adjustable from 2mA to 20mA to optimize power dissi­pation and gain control.
The MAX5851 accepts an input data and a DAC con­version rate of 80MHz. The inputs are latched on the rising edge of the clock whereas the output latches on the following rising edge.
The MAX5851 features three modes of operation: normal, standby, and power-down (Table 2). These modes allow efficient power management. In power-down, the MAX5851 consumes only 1µA of supply current. Wake­up time from standby mode to normal DAC operation is 3µs.
Programming the DAC
An 8-bit control word routed through channel A’s data port programs the gain matching, reference, and the operational mode of the MAX5851. The control word is latched on the rising edge of CW. CW is independent of the DAC clock. The DAC clock can always remain running when the control word is written to the DAC. Table 1 and Table 2 represent the control word format and function.
The gain on channel A can be adjusted to achieve gain matching between two channels in a user’s system. The gain on channel A can be adjusted from -0.4dB to +0.35dB in steps of 0.05dB by using bits G3 to G0 (see Table 3).
Pin Description (continued)
PIN NAME FUNCTION
32 REFR
Full-Scale Current Adjustment. To set the output full-scale current, connect an external resistor R
SET
between REFR and AGND. The output full-scale current is equal to 32 x V
REFO/RSET
.
33, 39 AV
DD
Anal og P ow er Inp ut. S ee the P ow er S up p l i es, Byp assi ng , D ecoup l i ng , and Layout secti on for m or e d etai l s.
34 OUTNB Channel B Negative Analog Current Output 35 OUTPB Channel B Positive Analog Current Output
36, 40 AGND Analog Ground
37 OUTNA Channel A Negative Analog Current Output 38 OUTPA Channel A Positive Analog Current Output
—EPExposed Paddle. Connect EP to the common point of all ground planes.
Figure 2. Simplified Diagram
DV
DD
DGND
CW
DA0/G0 DA1/G1 DA2/G2 DA3/G3
DA4/REN
DA5/IDE
DA6/DACEN
DA7/PD
DB0 DB1 DB2 DB3 DB4 DB5 DB6 DB7
DCE CLKXP CLKXN
CLK
CV
DD
CGND
DIGITAL POWER
MANAGEMENT
MAX5851
8-BIT
DACA
CONTROL WORD
DACA INPUT REGISTER
INPUT DATA
INTERLEAVER
DACB INPUT REGISTER
CLOCK
DISTRIBUTION
CLOCK POWER
MANAGEMENT
CHANNEL A
GAIN
CONTROL
OPERATING
MODE
CONTROLLER
8-BIT
DACB
ANALOG
POWER
MANAGEMENT
IDE
1.24V REFERENCE AND CONTROL
AMPLIFIER
REN
G0 G1 G2 G3
DACEN PD
OUTPA OUTNA
OUTPB OUTNB
REFO
REFR
AV
AGND
AGND
DD
R
SET
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
12 ______________________________________________________________________________________
Device Power-Up and
States of Operation
At power-up, the MAX5851’s default configuration is inter­nal reference, noninterleaved input mode with a gain of 0dB and a fully operational converter. In shutdown, the MAX5851 consumes only 1µA of supply current, and in standby the current consumption is 3.1mA. Wake-up time from standby mode to normal operation is 3µs.
Clock Modes
The MAX5851 allows both single-ended CMOS and dif­ferential clock mode operation, and supports update rates of up to 80Msps. These modes are selected through an active-low control line called DCE. In single­ended clock mode (DCE = 1), the CLK pin functions as an input, which accepts a user-provided single-ended clock signal. Data is written to the converter on the rising edge of the clock. 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
P-P
and a common-mode range of 1V to (CVDD- 0.5V), making the part ideal for low-input ampli­tude clock drives. CLKXP/CLKXN also help to minimize the jitter, and allow the user to connect a crystal oscilla­tor directly to the MAX5851.
The CLK pin now becomes an output, and provides a sin­gle-ended replica of the differential clock signal, which may be used to synchronize the input data. Data is writ­ten to the device on the rising edge of the CLK signal.
CONTROL WORD
FUNCTION
PD Power-Down. The part enters power-down mode if PD = 1.
DACEN DAC Enable. When DACEN = 0 and PD = 0, the part enters standby mode.
IDE
Interleaved Data Mode. IDE = 1 enables the interleaved data mode. In this mode, digital data for both channels is applied through channel A in a multiplexed fashion. Channel B data is written on the falling edge of the clock signal and channel A data is written on the rising edge of the clock signal.
REN
Reference Enable Bit. REN = 0 activates the internal reference. REN = 1 disables the internal reference and requires the user to apply an external reference between 0.1V to 1.32V.
G3 Bit 3 (MSB) of Gain Adjust Word G2 Bit 2 of Gain Adjust Word G1 Bit 1 of Gain Adjust Word G0 Bit 0 (LSB) of Gain Adjust Word
Table 1. Control Word Format and Function
GAIN ADJUSTMENT ON
CHANNEL A (dB)
G3G2G1
G0
+0.4 0000
0 1000
-0.35 1111
Table 3. Gain Difference Setting
X = Don’t care.
MSB LSB
PD DACEN IDE REN G3 G2 G1 G0
Table 2. Configuration Modes
MODE
REN
Normal operation; noninterleaved inputs; internal reference active
0100
Normal operation; noninterleaved inputs; internal reference disabled
0101
Normal operation; interleaved inputs; internal reference disabled
0111
Standby 0 0
X
Power-down 1 X
X
Power-up 0 1
X
PD DACEN IDE
X X X
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
______________________________________________________________________________________ 13
I
FS
C
COMP
*
REFR
I
REF
REFO
MAX4040
1.24V
BANDGAP
REFERENCE
CURRENT-
SOURCE
ARRAY
*COMPENSATION CAPACITOR (C
COMP
100nF)
OPTIONAL EXTERNAL BUFFER FOR HEAVIER LOADS
MAX5851
I
REF
=
V
REF
R
SET
R
SET
AGND
AGND
REN = 0
Figure 3. Setting IFSwith the Internal 1.24V Reference and the Control Amplifier
Internal Reference and Control Amplifier
The MAX5851 provides an integrated 50ppm/°C, 1.24V, low-noise bandgap reference that can be disabled and overridden with an external reference voltage. REFO serves either as an external reference input or an inte­grated reference output. If REN = 0, the internal refer­ence is selected and REFO provides a 1.24V (50µA) output. Buffer REFO with an external amplifier when dri­ving a heavy load.
The MAX5851 also employs a control amplifier designed to simultaneously regulate the full-scale out­put current (IFS) for both outputs of the devices. Calculate the output current as:
IFS= 32 I
REF
where I
REF
is the reference output current (I
REF
=
V
REFO
/ R
SET
) and IFSis the full-scale output current. R
SET
is the reference resistor that determines the amplifier out­put current of the MAX5851 (Figure 3). This current is mir­rored into the current-source array where IFSis equally distributed between matched current segments and summed to valid output current readings for the DACs.
External Reference
To disable the internal reference of the MAX5851, set REN = 1. Apply a temperature-stable, external reference to drive the REFO pin and set the full-scale output (Figure 4). For improved accuracy and drift performance, choose a fixed-output voltage reference such as the
1.2V, 25ppm/°C MAX6520 bandgap reference.
Detailed Timing
The MAX5851 accepts an input data and DAC con­version rate of up to 80Msps. The input latches on the rising edge of the clock, whereas the output latches on the following rising edge.
Figure 5 depicts the write cycle of the two DACs in non­interleaved mode.
The MAX5851 can also operate in an interleaved data mode. Programming the IDE bit with a high level activates this mode (Tables 1 and 2). In interleaved mode, data for both DAC channels is written through input port A. Channel B data is written on the falling edge of the clock signal and then channel A data is written on the following rising edge of the clock signal. Both DAC outputs (chan­nel A and B) are updated simultaneously on the next fol­lowing rising edge of the clock. The interleaved data mode is attractive for applications where lower data rates are acceptable and interfacing on a single 8-bit bus is desired (Figure 6).
AV
DD
EXTERNAL
1.2V
REFERENCE
MAX6520
AGND
0.1µF10µF
AV
DD
AGND
I
FS
REFR
I
REF
REFO
1.24V
BANDGAP
REFERENCE
CURRENT-
SOURCE
ARRAY
MAX5851
R
SET
AGND
REN = 1
Figure 4. MAX5851 with External Reference
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
14 ______________________________________________________________________________________
CLKXN
CLKXP
CLK
OUTPUT
CW
DA0–DA7
OUTPA
OUTNA
OUTPB
OUTNB
t
CXL
t
CXH
t
CDH
t
CDL
t
DCStDCH
t
DCStDCH
tCSt
CW
t
CWL
DACA DACB + 1 DACA + 1
CONTROL
WORD
DACB + 2 DACA + 2
DACA - 1
DACB - 1
DACA
DACB
DACA + 1
DACB + 1
Figure 6. Timing Diagram for Interleaved Data Mode (IDE = 1)
CLKXN
CLKXP
CLK
OUTPUT
CW
DA0–DA7
OUTPA
OUTNA
DB0–DB7
OUTPB
OUTNB
DACA - 1
DACB - 1
DACA
DACB
DACA + 1
DACB + 1
DACA + 2
DACB + 2
CONTROL
WORD
XXXX
DACA + 3
DACB + 3
DACA - 1
DACB - 1
DACA
DACB
DACA + 1
DACB + 1
DACA + 2
DACB + 2
XXXX
(CONTROL WORD DATA)
XXXX
DACA + 3
DACB + 3
t
CXHtCXL
t
CDH
t
CDL
t
DCStDCH
t
DCStDCH
t
CWL
tCSt
CW
Figure 5. Timing Diagram for Noninterleaved Data Mode (IDE = 0)
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
______________________________________________________________________________________ 15
DA0–DA7
8
MAX5851
1/2
50
100
50
OUTPA
OUTNA
V
OUTA
,
SINGLE ENDED
DB0–DB7
8
MAX5851
1/2
50
100
50
OUTPB
OUTNB
V
OUTB
,
SINGLE ENDED
CV
DD
DV
DD
AV
DD
CGNDDGNDAGND
Figure 7. Application with Output Transformer (Coilcraft TTWB3010-1) Performing Differential-to-Single-Ended Conversion
DA0–DA7
8
MAX5851
1/2
1/2
50
50
CV
DD
DV
DD
AV
DD
CGNDDGNDAGND
OUTPA
OUTNA
DB0–DB7
8
MAX5851
50
50
OUTPB
OUTNB
Figure 8. Application with DC-Coupled Differential Outputs
Applications Information
Differential-to-Single-Ended Conversion
The MAX5851 exhibits excellent dynamic performance to synthesize a wide variety of modulation schemes, including high-order QAM modulation with OFDM.
Figure 7 shows a typical application circuit with output transformers performing the required differential-to­single-ended signal conversion. In this configuration, the MAX5851 operates in differential mode, which reduces even-order harmonics, and increases the available output power.
Differential DC-Coupled Configuration
Figure 8 shows the MAX5851 output operating in differ­ential, DC-coupled mode. This configuration can be used in communication systems employing analog quadrature upconverters and requiring a baseband sampling, dual-channel, high-speed DAC for I/Q syn-
thesis. In these applications, information bandwidth can extend from 10MHz down to several hundred kilohertz. DC-coupling is desirable to eliminate long discharge time constants that are problematic with large, expen­sive coupling capacitors. Analog quadrature upcon­verters have a DC common-mode input requirement of typically 0.7V to 1.0V. The MAX5851 differential I/Q out­puts 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 MAX5851 meets this low-power requirement with mini­mal reduction in dynamic range while eliminating the need for level-shifting resistor networks.
Power Supplies, Bypassing,
Decoupling, and Layout
Grounding and power-supply decoupling strongly influ­ence the MAX5851 performance. Unwanted digital crosstalk can couple through the input, reference,
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
16 ______________________________________________________________________________________
*Vias connect the land pattern to internal or external copper planes.
power-supply, and ground connections, which can affect dynamic specifications, like signal-to-noise ratio or spurious-free dynamic range. In addition, electro­magnetic interference (EMI) can either couple into or be generated by the MAX5851. Observe the grounding and power-supply decoupling guidelines for high­speed, high-frequency applications. Follow the power­supply and filter configuration to realize optimum dynamic performance.
Use of a multilayer printed circuit (PC) board with sepa­rate ground and power-supply planes is recommend­ed. Run high-speed signals on lines directly above the ground plane. The MAX5851 has separate analog and digital ground buses (AGND, CGND, and DGND, respectively). Provide separate analog, digital, and clock ground sections on the PC board with only one point connecting the three planes. The ground connec­tion points should be located underneath the device and connected to the exposed paddle. Run digital sig­nals above the digital ground plane and analog/clock signals above the analog/clock ground plane. Digital signals should be kept away from sensitive analog, clock, and reference inputs. Keep digital signal paths short and metal trace lengths matched to avoid propa­gation delay and data skew mismatch.
The MAX5851 includes three separate power-supply inputs: analog (AV
DD
), digital (DVDD), and clock
(CV
DD
). Use a single linear regulator power source to branch out to three separate power-supply lines (AVDD, DV
DD
, CVDD) and returns (AGND, DGND, CGND). Filter each power-supply line to the respective return line using LC filters comprising ferrite beads and 10µF capacitors. Filter each supply input locally with 0.1µF ceramic capacitors to the respective return lines.
Note: To maintain the dynamic performance of the Electrical Characteristics, ensure the voltage differ­ence between DV
DD
, AVDD, and CVDDdoes not
exceed 150mV.
Thermal Characteristics and Packaging
Thermal Resistance
40-lead thin QFN-EP:
θ
JA
= 38°C/W
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.
In this package, the data converter die is attached to an EP lead frame with the back of this frame exposed at the package bottom surface, facing the PC board side of the package. This allows a solid attachment of the pack­age to the PC board with standard infrared (IR) flow sol­dering techniques. A specially created land pattern on the PC board, matching the size of the EP (4.1mm
4.1mm), ensures the proper attachment and grounding of the DAC. Designing vias* into the land area and implementing large ground planes in the PC board design allows for highest performance operation of the DAC. Use an array of 3
3 vias (≤0.3mm diameter per
via hole and 1.2mm pitch between via holes) for this 40­pin thin QFN-EP package (package code: T4066-1).
Dynamic Performance
Parameter Definitions
Total Harmonic Distortion (THD)
THD is the ratio of the RMS sum of all essential harmon­ics (within a Nyquist window) of the input signal to the fundamental itself. This can be expressed as:
where V1is the fundamental amplitude, and V2through VNare the amplitudes of the 2nd through Nth order har­monics. The MAX5851 uses the first seven harmonics for this calculation.
Spurious-Free Dynamic Range (SFDR)
SFDR is the ratio of RMS amplitude of the carrier fre­quency (maximum signal component) to the RMS value of their next-largest spectral component. SFDR is usu­ally measured in dBc with respect to the carrier fre­quency amplitude or in dBFS with respect to the DAC’s full-scale range. Depending on its test condition, SFDR is observed within a predefined window or to Nyquist.
Multitone Power Ratio (MTPR)
A series of equally spaced tones are applied to the DAC with one tone removed from the center of the range. MTPR is defined as the worst-case distortion (usually a 3rd-order harmonic product of the fundamental frequen­cies), which appears as the largest spur at the frequency of the missing tone in the sequence. This test can be per­formed with any number of input tones; however, four and eight tones are among the most common test conditions for CDMA- and GSM/EDGE-type applications.
THD
VVV V
V
N
++ +
 
 
  
  
log
... ...
20
22324
22
1
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
______________________________________________________________________________________ 17
Intermodulation Distortion (IMD)
The two-tone IMD is the ratio expressed in dBc of either out­put tone to the worst 3rd-order (or higher) IMD products.
Static Performance Parameter Definitions
Integral Nonlinearity (INL)
Integral nonlinearity (INL) is the deviation of the values on an actual transfer function from a line drawn between the end points of the transfer function, once offset and gain errors have been nullified. For a DAC, the deviations are measured at every individual step.
Differential Nonlinearity (DNL)
Differential nonlinearity (DNL) is the difference between an actual step height and the ideal value of 1 LSB. A DNL error specification no more negative than -1 LSB guarantees monotonic transfer function.
Offset Error
Offset error is the current flowing from positive DAC output when the digital input code is set to zero. Offset error is expressed in LSBs.
Gain Error
A gain error is the difference between the ideal and the actual full-scale output current on the transfer curve, after nullifying the offset error. This error alters the slope of the transfer function and corresponds to the same percentage error in each step. The ideal current is defined by reference voltage at 32 x V
REFO
/ R
SET
.
Settling Time
The settling time is the amount of time required from the start of a transition until the DAC output settles to its new output value to within the converter’s specified accuracy.
Glitch Impulse
A glitch is generated when a DAC switches between two codes. The largest glitch is usually generated around the midscale transition, when the input pattern transitions from 011…111 to 100…000. This occurs due to timing variations between the bits. The glitch impulse is found by integrating the voltage of the glitch at the midscale transition over time. The glitch impulse is usu­ally specified in pV-s.
Chip Information
TRANSISTOR COUNT: 9035 PROCESS: CMOS
Table 4. Part Selection Table
PART SPEED (Msps) RESOLUTION
MAX5851 80 8 bit, dual MAX5852 165 8 bit, dual MAX5853 80 10 bit, dual MAX5854 165 10 bit, dual
MAX5851
Dual, 8-Bit, 80Msps, Current-Output DAC
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 Printed USA is a registered trademark of Maxim Integrated Products.
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages
.)
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages
.)
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages
.)
QFN THIN 6x6x0.8.EPS
e e
LL
A1 A2
A
E/2
E
D/2
D
E2/2
E2
(NE-1) X e
(ND-1) X e
e
D2/2
D2
b
k
k
L
C
L
C
L
C
L
C
L
E
1
2
21-0141
PACKAGE OUTLINE 36, 40, 48L THIN QFN, 6x6x0.8mm
L1
L
e
8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.
6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY.
5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.25 mm AND 0.30 mm FROM TERMINAL TIP.
4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE.
9. DRAWING CONFORMS TO JEDEC MO220, EXCEPT FOR 0.4mm LEAD PITCH PACKAGE T4866-1.
7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION.
3. N IS THE TOTAL NUMBER OF TERMINALS.
2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.
1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994.
NOTES:
10. WARPAGE SHALL NOT EXCEED 0.10 mm.
E
2
2
21-0141
PACKAGE OUTLINE 36, 40, 48L THIN QFN, 6x6x0.8mm
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