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19-3015; Rev 0; 10/03
622Mbps, Low-Noise, High-Gain Transimpedance Preamplifier
General Description
The MAX3658 is a transimpedance preamplifier for receivers operating up to 622Mbps. Low noise, high gain, and low power dissipation make it ideal for fiber access and small form-factor transceivers. The MAX3658 features 45nA input-referred noise, 18k transimpedance gain, 580MHz bandwidth, and 2mAP-P input overload. Operating from a +3.3V supply, the MAX3658 consumes only 66mW. An integrated filter resistor provides positive bias for the photodiode. These features, combined with a small die size, allow easy assembly into a TO-46 header with a photodiode. The MAX3658 also includes an average photocurrent monitor. The MAX3658 has typical optical sensitivity of -33dBm (0.9A/W), which exceeds the class-B APON requirements. Typical optical overload is 1dBm. The MAX3658 is available in die form with both output polarities (MAX3658A and MAX3658B). The MAX3658A is also available in a 3mm x 3mm 8-pin TDFN package. o 45nARMS Noise, -33dBm Sensitivity o 18.3k Transimpedance Gain o 580MHz Bandwidth o 2mAP-P Input Overload, 1dBm Overload o 66mW Power Dissipation o 3.3V Operation o Average Photocurrent Monitor
Features
MAX3658
Ordering Information
PART MAX3658AETA MAX3658AE/D TEMP RANGE -40C to +85C -- -- PINPACKAGE PACKAGE CODE
8 TDFN T833-1 (3mm x 3mm) Dice* Dice* -- --
Applications
Optical Receivers (Up to 622Mbps Operation) Passive Optical Networks SFF/SFP Transceivers FTTx Transceivers
MAX3658BE/D
*Dice are designed to operate over a -40C to +100C junction temperature (Tj) range, but are tested and guaranteed at TA = +25C. Pin Configuration appears at end of data sheet.
Typical Operating Circuit
+3.3V CVCC1
CVCC2
5-PIN TO-46 HEADER RFILT FILT 0.1F CFILT IN 0.1F OUT75* LIMITING AMPLIFIER OUT+ 75* 25*
MAX3748
COUT* 25* 100
MAX3658
GND MON
RMON *OPTIONAL COMPONENTS
________________________________________________________________ Maxim Integrated Products
1
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622Mbps, Low-Noise, High-Gain Transimpedance Preamplifier MAX3658
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC) ............................................-0.5V to +4.2V Current into IN ....................................................................+5mA Voltage at OUT+, OUT- ...................(VCC - 1.2V) to (VCC + 0.5V) Voltage FILT, MON .....................................-0.5V to (VCC + 0.5V) Continuous Power Dissipation (TA = +85C) 8-Lead TDFN (derate 24.4mW/C above +85C) ......1951.2mW Operating Temperature Range ...........................-40C to +85C Operating Junction Temperature Range (die) ....-40C to +150C Storage Temperature Range .............................-55C to +150C Lead Temperature (soldering, 10s) .................................+300C Die Attach Temperature...................................................+400C
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.
DC ELECTRICAL CHARACTERISTICS
(VCC = +2.97V to +3.63V, 150 load between OUT+ and OUT-, Tj = -40C to +100C. Typical values are at VCC = +3.3V and TA = +25C, unless otherwise noted.)
PARAMETER Supply Current Input Bias Voltage Transimpedance Linear Range Small-Signal Transimpedance Output Common-Mode Voltage Differential Output Offset Output Impedance Maximum Output Voltage Filter Resistor Offset-Correction Disable Threshold Input Resistance Nominal MON Current Gain MON Output Voltage Range MON Accuracy (Note 1) GMON VMON 1A IIN < 2A 2A IIN < 5A 5A IIN < 1mA VOUT ZOUT VOUT(MAX) RFILT Z21 SYMBOL ICC VIN IIN = 1A 0.95 < linearity < 1.05 IIN < 2AP-P AC-coupled output IIN = 1.3mA Single ended IIN = 2mAP-P IIN = 4A IIN = 1.3mA Voltage applied at FILT FILT = 0V IMON / IIN (IIN = 1mA, 3.3V, +25C) 0.8 0 -2.5 -2 -1.5 60 150 15 300 4 15.7 18.3 VCC 0.125 2 75 240 20 500 0.4 400 1 1.2 2.2 +2.5 +2 +1.5 dB 90 400 25 700 20.9 CONDITIONS MIN TYP 20 0.83 MAX 26 1.0 UNITS mA V AP-P k V mV mVP-P k V A/A V
Note 1: Accuracy is defined as 10log(IMON / IIN).
2
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622Mbps, Low-Noise, High-Gain Transimpedance Preamplifier
AC ELECTRICAL CHARACTERISTICS
(VCC = +2.97V to +3.63V, 150 load between OUT+ and OUT-, CIN = 0.5pF total, CFILT = 400pF, CVCC2 = 1nF, Tj = -40C to +100C, TA = -40C to +85C. Typical values are at VCC = +3.3V and TA = +25C, unless otherwise noted. AC characteristics are guaranteed by design and characterization.)
PARAMETER Bandwidth Input-Referred Noise Noise Density Low-Frequency Cutoff Deterministic Jitter (Note 3) Optical Overload Optical Sensitivity DJ PIN (MAX) PIN (MIN) SYMBOL BW in (Note 2) BW = 467MHz BW = 467MHz IIN = 1A 2AP-P IIN < 10AP-P 10AP-P IIN < 2mAP-P 1.0A/W photodiode 0.9A/W photodiode +1 -33 CONDITIONS MIN 435 TYP 580 45 2.1 30 150 260 55 MAX UNITS MHz nARMS pA/Hz kHz psP-P dBm dBm
MAX3658
Note 2: -3dB bandwidth is measured relative to the gain at 10MHz. Note 3: Measured using a pattern equivalent to 223 - 1 PRBS with 72 CIDs at 622Mbps.
Typical Operating Characteristics
(VCC = +3.3V, CIN = 0.5pF, TA = +25C, unless otherwise noted.)
SMALL-SIGNAL TRANSIMPEDANCE vs. TEMPERATURE
MAX3658 toc01
SUPPLY CURRENT vs. TEMPERATURE
MAX3658 toc02
MONITOR CURRENT vs. DC INPUT CURRENT
MAX3658 toc03
20
30
1000
MONITOR CURRENT (A)
19 TRANSIMPEDANCE (k)
27 SUPPLY CURRENT (mA)
100
18
24
10
17
21
16
18
1
15 -40 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE (C)
15 -40 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE (C)
0.1 0.1 1 10 100 1000 DC INPUT CURRENT (A)
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3
622Mbps, Low-Noise, High-Gain Transimpedance Preamplifier MAX3658
Typical Operating Characteristics (continued)
(VCC = +3.3V, CIN = 0.5pF, TA = +25C, unless otherwise noted.)
SMALL-SIGNAL LOW-FREQUENCY CUTOFF vs. DC INPUT CURRENT
MAX3658 toc05 MAX3658 toc06
FILTER VOLTAGE vs. DC INPUT CURRENT
MAX3658 toc04
DETERMINISTIC JITTER vs. INPUT CURRENT AMPLITUDE
70 65 DETERMINISTIC JITTER (ps) 60 55 50 45 40 35 30 1000 LOW-FREQUENCY CUTOFF (kHz)
1600 1400 FILTER VOLTAGE (mV) 1200 1000 800 600 400 200 0 1 10 RFILT = 20k 100 1000 RFILT = 500
100
10
25 20 10,000 1 10 100
SEE NOTE 3 1000 10,000
1 1 10 100 1000 DC INPUT CURRENT (A)
DC INPUT CURRENT (A)
INPUT CURRENT (AP-P)
DIFFERENTIAL OUTPUT VOLTAGE vs. INPUT CURRENT
DIFFERENTIAL OUTPUT VOLTAGE (mVP-P)
MAX3658 toc07
FREQUENCY RESPONSE
MAX3658 toc08
BANDWIDTH vs. INPUT CAPACITANCE
MAX3658 toc09
250
90 85 TRANSIMPEDANCE (dB) 80 75 70 65 20 log (VOUT / IIN) 60
1200 1000 BANDWIDTH (MHz) 800 600 400 200 0 TEMP = +25C
200
150
100
50
0 0 5 10 15 20 25 30 INPUT CURRENT (AP-P)
1k
10k
100k 1M 10M 100M FREQUENCY (Hz)
1G
10G
0
0.3
0.6
0.9
1.2
1.5
INPUT CAPACITANCE (pF)
INPUT-REFERRED RMS NOISE vs. INPUT CAPACITANCE
MAX3658 toc10
INPUT-REFERRED RMS NOISE vs. DC INPUT CURRENT
MAX3658 toc11
OUTPUT EYE DIAGRAM (2A ELECTRICAL INPUT)
MAX3658 toc12
70 INPUT-REFERRED NOISE (nARMS) 60 50 40 30 20 10 0 0.3 0.6 0.9 1.2 TEMP = +25C TEMP = -40C TEMP = +110C
350 INPUT-REFERRED NOISE (nARMS) 300 250 200
2A 231 - 1 PRBS INPUT AT 622.08Mbps
4.8mV/div 150 100 50 0
IIN = 0A 467MHz BANDWIDTH 1.5
0.1
1
10
100
330ps/div
INPUT CAPACITANCE (pF)
DC INPUT CURRENT (A)
4
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622Mbps, Low-Noise, High-Gain Transimpedance Preamplifier
Typical Operating Characteristics (continued)
(VCC = +3.3V, CIN = 0.5pF, TA = +25C, unless otherwise noted.)
MAX3658
OUTPUT EYE DIAGRAM (-28dBm OPTICAL INPUT)
MAX3658 toc13
OUTPUT EYE DIAGRAM (0dBm OPTICAL INPUT)
MAX3658 toc14
231 - 1 PRBS INPUT AT 622Mbps
231 - 1 PRBS INPUT AT 622Mbps
4.5mV/div
20mV/div
300ps/div
200ps/div
Pin Description
PIN 1 2 3 NAME VCC IN FILT +3.3V Supply Voltage Signal Input. Connect to photodiode anode. Optional Filter Connection. Use to bias the photodiode cathode. An internal on-chip resistive network is connected between this pin and VCC; an external decoupling capacitor connected to this pin forms a filter (see the Design Procedure section). Leave this pin open if a filter is not required. Optional Photocurrent Monitor. This is a current output. Connect a resistor between MON and ground to monitor the average photocurrent. Leave this pin open if a monitor is not required. Circuit Ground Positive 75 Data Output. Increasing input current causes OUT+ to increase. Negative 75 Data Output. Increasing input current causes OUT- to decrease. FUNCTION
4 5, 8 6 7
MON GND OUT+ OUT-
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5
622Mbps, Low-Noise, High-Gain Transimpedance Preamplifier MAX3658
Functional Diagram
Rf ROUT OUT+ IN TIA VOLTAGE AMPLIFIER OUTPUT BUFFER ROUT OUT-
LOWPASS FILTER DC CANCELLATION EN VCC RESISTIVE NETWORK
MON FILT
MAX3658
Detailed Description
The MAX3658 transimpedance amplifier is designed for 622Mbps fiber optic applications. The MAX3658 is comprised of a transimpedance amplifier, a voltage amplifier, an output buffer, a DC cancellation circuit, and a photocurrent monitor.
AMPLITUDE
Transimpedance Amplifier
The signal current at the input flows into the summing node of a high-gain amplifier. Shunt feedback through resistor RF converts this current into a voltage. Schottky diodes clamp the output signal for large input currents (Figure 1).
TIME OUTPUT (SMALL SIGNALS) OUTPUT (LARGE SIGNALS)
Voltage Amplifier
The voltage amplifier provides additional gain and converts the transimpedance amplifier single-ended output into a differential signal.
Figure 1. MAX3658 Limited Output
6
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622Mbps, Low-Noise, High-Gain Transimpedance Preamplifier
Design Procedure
AMPLITUDE INPUT FROM PHOTODIODE
MAX3658
Select Photodiode
Noise performance and bandwidth are adversely affected by capacitance on the TIA input node. Select a lowcapacitance photodiode to minimize the total input capacitance on this pin. The MAX3658 is optimized for 0.5pF of capacitance on the input. Assembling the MAX3658 in die form using chip and wire technology provides the lowest capacitance input and the best possible performance.
TIME
INPUT AFTER DC CANCELLATION
Select CFILT
Figure 2. DC Cancellation Effect on Input
Output Buffer
The output buffer is designed to drive a 150 differential load between OUT+ and OUT-. For optimum supply noise rejection, the MAX3658 should be terminated with a differential load. The MAX3658 single-ended outputs do not drive a DC-coupled grounded load. The outputs should be AC-coupled or terminated to VCC. If a singleended output is required, both the used and the unused outputs should be terminated in a similar manner (see the Interface Schematics section).
Supply voltage noise at the cathode of the photodiode produces a current i = CPD dv/dt, which reduces the receiver sensitivity (C PD is the photodiode capacitance). The filter resistor of the MAX3658 combined with an external capacitor, can be used to reduce the effect of supply noise on performance (see the Typical Operating Circuit). Current generated by supply noise voltage is divided between CFILT and CPD. To obtain a good optical sensitivity select CFILT 400pF.
Select Supply Filter
Sensitive optical receivers require wide-band powersupply decoupling. Power-supply bypassing should provide low impedance between VCC and ground for frequencies between 10kHz and 700MHz. Isolate the MAX3658 from noise sources with LC supply filters and shielding. Place a supply filter (CVCC2) as close to the MAX3658 as possible.
DC Cancellation Circuit
The DC cancellation circuit uses low-frequency feedback to remove the DC component of the input signal (Figure 2). This feature centers the input signal within the transimpedance amplifier's linear range, thereby reducing pulse-width distortion. The DC cancellation circuit is internally compensated and does not require external capacitors. This circuit minimizes pulse-width distortion for data sequences that exhibit a 50% mark density. A mark density significantly different from 50% causes the MAX3658 to generate pulse-width distortion. Grounding the FILT pin disables the DC cancellation circuit. For normal operation, the DC cancellation circuit must be enabled. The DC cancellation current is drawn from the input and creates noise. For low-level signals with little or no DC component, the added noise is insignificant. However, amplifier noise increases for signals with significant DC component (see the Typical Operating Characteristics).
Select RMON
If photocurrent monitoring is desired, connect a resistor between MON and ground to monitor the average photocurrent. Select RMON as large as possible: RMON = 2.2V IMONMAX
where IMONMAX is the largest average input current observed. An ammeter can also monitor the current out of the MON pin.
Select Coupling Capacitors
A receiver built with the MAX3658 will have a bandpass frequency response. The low-frequency cutoff due to the coupling capacitors and load resistors is: LFC TERM = 1 2 x RLOAD x CCOUPLE
Photocurrent Monitor
The MAX3658 includes an average photocurrent monitor. The current sourced from MON to ground is approximately equal to the DC current at IN.
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7
622Mbps, Low-Noise, High-Gain Transimpedance Preamplifier MAX3658
Select CCOUPLE so the low-frequency cutoff due to the load resistors and coupling capacitors is much lower than the low-frequency cutoff of the MAX3658. The coupling capacitor should be 0.1F or larger for SONET data. For lowest jitter, 1.0F is recommended. Refer to application note HFAN-1.1: Choosing AC-Coupling Capacitors for a more detailed discussion on choosing AC-coupling capacitors.
MON PHOTODIODE 5-PIN HEADER OUT+
IN FILT MON
VCC CVCC2 OUT-
Select Output Filter
Input sensitivity is improved by adding a filter between TIA and the quantizer/limiting amplifier, with 0.5pF input capacitance. Typical bandwidth of the MAX3658 is 580MHz; the highest expected bandwidth is 730MHz.
Layout Considerations
Figure 3 shows suggested layouts for 4- and 5-pin TO headers.
MAX3658A
PHOTODIODE MOUNTED ON CFILT OUTPUT POLARITIES REVERSED FOR MAX3658B CASE IS GROUND
Wire Bonding
For high-current density and reliable operation, the MAX3658 uses gold metalization. For best results, use gold-wire ball-bonding techniques. Use caution when wedge bonding. Die-size is 52 mils x 29 mils, (1.32mm x 0.736mm) and die thickness is 15 mils (380m). The bond-pad passivation opening is 75m and bond-pad metal thickness is 5m. Refer to Maxim application note HFAN-08.0.1: Understanding Bonding Coordinates and Physical Die Size for additional information on bondpad coordinates.
CVCC2
VCC PHOTODIODE 4-PIN HEADER OUT+ OUTIN FILT MON
Applications Information
MAX3658A
Optical Power Relations
Many of the MAX3658 specifications relate to the input signal amplitude. When working with optical receivers, the input is sometimes expressed in terms of average optical power and extinction ratio. Figure 4 and Table 1 show relations that are helpful for converting optical power to input signal when designing with the MAX3658.
Figure 3. Suggested TO Header Layouts
PHOTODIODE MOUNTED ON CFILT OUTPUT POLARITIES REVERSED FOR MAX3658B CASE IS GROUND
Table 1. Optical Power Relations*
PARAMETER Average Power Extinction Ratio Optical Power of a 1 Optical Power of a 0 Optical Modulation Amplitude SYMBOL PAVG re P1 P0 RELATION
Optical Sensitivity Calculation
The input-referred RMS noise current (i n ) of the MAX3658 generally determines the receiver sensitivity. To obtain a system bit-error rate (BER) of 1E-10, the signal-to-noise ratio must always exceed 12.7. The input sensitivity, expressed in average power, can be estimated as:
12.7 x i x r + 1 n e SENSITIVITY = 10log x 1000 dBm 2x x r -1 e
(
(
)
)
PIN
P0 + P1 2 P1 re = P0 re P1 = 2PAVG re + 1 2PAVG P0 = re + 1 PIN = P1 - P0 r -1 = 2PAVG e re + 1 PAVG =
*Assuming a 50% average mark density. 8 _______________________________________________________________________________________
622Mbps, Low-Noise, High-Gain Transimpedance Preamplifier
Optical Linear Range
P1
MAX3658
The MAX3658 has high gain, which limits the output for large input signals. The MAX3658 operates in a linear range for inputs not exceeding:
4A x r + 1 e LINEAR RANGE = 10log x 1000 dBm 2 x x r - 1 e
OPTICAL POWER
(
PAVG
(
)
)
For example, with photodiode responsivity of 0.9A/W and an extinction ratio of 10, the linear range is:
P0
TIME
4A x 11 LINEARRANGE = 10log x 1000 dBm 2 x 0.9 x 9 = - 25dBm
Figure 4. Optical Power Relations
Interface Schematics
where is the photodiode responsivity in A/W and in is the RMS noise current in amps. For example, with photodiode responsivity of 0.9A/W, an extinction ratio of 10 and 45nA input-referred noise, the sensitivity of the MAX3658 is:
12.7 x 45nA x 11 SENSITIVITY = 10log x 1000 dBm 2 x 0.9A / W x 9 = - 34dBm
Equivalent Output Interface
The MAX3658 has a differential output structure with 75 termination (150 differential). Figure 5 is a simplified diagram of the output interface. Common test equipment is designed with a 50 single-ended termination (100 differential). Figures 6a and 6b show alternate interface schemes for the MAX3658.
VCC ROUT 75 ROUT 75 VCC
Actual results may vary depending on supply noise, output filter, limiting amplifier sensitivity, and other factors (refer to application note HFAN-3.0.0: Accurately Estimating Optical Receiver Sensitivity). Maxim obtains -33dBm typ sensitivity combined with the MAX3748.
OUT+ VCC
Input Optical Overload
Overload is the largest input that the MAX3658 accepts while meeting the pulse-width distortion specification. Optical overload can be estimated in terms of average power with the following equation: 2mA OVERLOAD = 10log x 1000 dBm 2 x For example, if photodiode responsivity is 1.0A/W, the input overload is 0dBm.
Figure 5. Equivalent Output Interface
OUT-
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9
622Mbps, Low-Noise, High-Gain Transimpedance Preamplifier MAX3658
VCC
75
75
150
150 0.1F 50 0.1F 50 L
50
50
DIFFERENTIAL INPUT STAGE
MAX3658
OUTPUT STAGE *COMPONENT NOT REQUIRED IF L < 5cm
Figure 6a. 50 AC-Coupled Interface
VCC
150 75 75
50
150
50
50 L
SINGLE-ENDED INPUT STAGE
MAX3658
OUTPUT STAGE NOTE: THE PARALLEL COMBINATION AT THE UNUSED OUTPUT CAN BE REPLACED BY A SINGLE EQUIVALENT 37.5 RESISTOR. *COMPONENT NOT REQUIRED IF L < 5cm
Figure 6b. 50 DC-Coupled Single-Ended Output Interface
10
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622Mbps, Low-Noise, High-Gain Transimpedance Preamplifier
VCC 400
Pad Coordinates
Table 2 gives center pad coordinates for the MAX3658 bond pads. Refer to application note HFAN-8.0.1: Understanding Bonding Coordinates and Physical Die Size for more information on bond-pad coordinates.
MAX3658
20k FILT 20pF
Table 2. Bond-Pad Information
PAD NAME MAX3658A MON GND N.C. OUT+ OUTN.C. GND VCC IN FILT MAX3658B MON GND N.C. OUTOUT+ N.C. GND VCC IN FILT COORDINATES (m) X 16.6 18.0 18.0 16.6 445.0 456.2 455.0 455.0 254.6 135.6 Y 818.6 543.4 425.8 39.4 39.4 155.6 565.8 818.6 818.6 818.6
Figure 7. FILT Interface
BP1 BP2 BP3
VCC
BP4 BP5 BP6 BP7 BP8 BP9
MON
BP10
Figure 8. MON Interface
Pin Configuration
TOP VIEW
Chip Information
TRANSISTOR COUNT: 833 PROCESS: GST-4
VCC IN FILT MON
1 2 3 4
8 7
GND OUTOUT+ GND
MAX3658 AGP**
6 5
TDFN* (3mm x 3mm)
*THE EXPOSED PAD MUST BE CONNECTED TO CIRCUIT BOARD GROUND FOR PROPER THERMAL AND ELECTRICAL PERFORMANCE. **AGP = DEVICE TOPMARK.
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11
622Mbps, Low-Noise, High-Gain Transimpedance Preamplifier MAX3658
Chip Topographies
Topography for MAX3658A
FILT IN
MON
1
10
9
8
VCC
7 GND 2
GND
N.C.
3
0.052in 1.32mm
6
N.C.
OUT+
4
5
OUT-
(0,0)
0.029in 0.736mm
12
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622Mbps, Low-Noise, High-Gain Transimpedance Preamplifier
Chip Topographies (continued)
Topography for MAX3658B
FILT IN
MAX3658
MON
1
10
9
8
VCC
7 GND 2
GND
N.C.
3
0.052in 1.32mm
6
N.C.
OUT-
4
5
OUT+
(0,0)
0.029in 0.736mm
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13
622Mbps, Low-Noise, High-Gain Transimpedance Preamplifier MAX3658
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.)
6, 8, &10L, QFN THIN.EPS
1 2
L D A A2
PIN 1 ID
D2
1
N
1
b
PIN 1 INDEX AREA
C0.35 [(N/2)-1] x e REF. e
E
DETAIL A
E2
A1
k
C L
C L
L e A e
L
SEMICONDUCTOR
PROPRIETARY INFORMATION TITLE:
DALLAS
PACKAGE OUTLINE, 6, 8 & 10L, TDFN, EXPOSED PAD, 3x3x0.80 mm
NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY
APPROVAL DOCUMENT CONTROL NO. REV.
21-0137
D
COMMON DIMENSIONS SYMBOL A D E A1 L k A2 MIN. 0.70 2.90 2.90 0.00 0.20 MAX. 0.80 3.10 3.10 0.05 0.40
0.25 MIN. 0.20 REF.
PACKAGE VARIATIONS PKG. CODE T633-1 T833-1 T1033-1 N 6 8 10 D2 1.50-0.10 1.50-0.10 1.50-0.10 E2 2.30-0.10 2.30-0.10 2.30-0.10 e 0.95 BSC 0.65 BSC 0.50 BSC JEDEC SPEC MO229 / WEEA MO229 / WEEC MO229 / WEED-3 b 0.40-0.05 0.30-0.05 0.25-0.05 [(N/2)-1] x e 1.90 REF 1.95 REF 2.00 REF
SEMICONDUCTOR
PROPRIETARY INFORMATION TITLE:
DALLAS
PACKAGE OUTLINE, 6, 8 & 10L, TDFN, EXPOSED PAD, 3x3x0.80 mm
APPROVAL DOCUMENT CONTROL NO. REV.
2 2
21-0137
D
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.
14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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