View MAX9943ATT_4465364.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-4433; Rev 2; 6/09
High-Voltage, Precision, Low-Power Op Amps
General Description
The MAX9943/MAX9944 is a family of high-voltage amplifiers that offers precision, low drift, and low-power consumption. The MAX9943 (single) and MAX9944 (dual) op amps offer 2.4MHz of gain-bandwidth product with only 550A of supply current per amplifier. The MAX9943/MAX9944 family has a wide power supply range operating from 3V to 19V dual supplies or a 6V to 38V single supply. The MAX9943/MAX9944 is ideal for sensor signal conditioning, high-performance industrial instrumentation and loop-powered systems (e.g., 4mA-20mA transmitters). The MAX9943 is offered in a space-saving 6-pin TDFN or 8-pin MAX(R) package. The MAX9944 is offered in an 8-pin SO or an 8-pin TDFN package. These devices are specified over the -40C to +125C automotive temperature range. o Wide 6V to 38V Supply Range o Low 100V (max) Input Offset Voltage o Low 0.4V/C Offset Drift o Unity Gain Stable with 1nF Load Capacitance o 2.4MHz Gain-Bandwidth Product o 550A Supply Current o 20mA Output Current o Rail-to-Rail Output o Package Options 3mm x 5mm, 8-Pin MAX or 3mm x 3mm, 6-Pin TDFN Packages (Single) 5mm x 6mm, 8-Pin SO or 3mm x 3mm, 8-Pin TDFN Packages (Dual)
Features
MAX9943/MAX9944
Ordering Information
PART MAX9943AUA+ MAX9943ATT+ MAX9944ASA+ MAX9944ATA+ TEMP RANGE -40C to +125C -40C to +125C -40C to +125C -40C to +125C PINPACKAGE 8 MAX 6 TDFN-EP* 8 SO 8 TDFN-EP* TOP MARK AACA AUF -- BLN
Applications
Sensor Interfaces Loop-Powered Systems Industrial Instrumentation High-Voltage ATE High-Performance ADC/DAC Input/Output Amplifiers
MAX is a registered trademark of Maxim Integrated Products, Inc.
+Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad.
Capacitive Load vs. Resistive Load
MAX9943 toc17
Package Detail
TOP VIEW
100,000
MAX9943
OUT 1 *EP 6 VCC
10,000 CLOAD (pF)
UNSTABLE
VEE
2
5
N.C.
1000
STABLE
IN+ 3 4 IN-
100 100 1000 10,000 RLOAD () 100,000
TOP VIEW 6 TDFN-EP
*EP = EXPOSED PAD.
Pin Configurations appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
High-Voltage, Precision, Low-Power Op Amps MAX9943/MAX9944
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC to VEE) ..................................-0.3V to +40V All Other Pins (Note 1) .....................(VEE - 0.3V) to (VCC + 0.3V) OUT Short-Circuit Current Duration 8-Pin MAX (VCC - VEE 20V)...............................................3s 8-Pin MAX (VCC - VEE > 20V) ................................Momentary 6-Pin TDFN (VCC - VEE 20V) .............................................60s 6-Pin TDFN (VCC - VEE > 20V)...............................................2s 8-Pin SO (VCC - VEE 20V) .................................................60s 8-Pin SO (VCC - VEE > 20V)...................................................2s 8-Pin TDFN (VCC - VEE 20V) .............................................60s 8-Pin TDFN (VCC - VEE > 20V)...............................................2s Continuous Input Current (Any Pins) ................................20mA Thermal Limits (Note 2) Multiple Layer PCB Continuous Power Dissipation (TA = +70C) 8-Pin MAX (derate 4.8mW/C above +70C) ...........387.8mW JA .........................................................................206.3C/W JC ..............................................................................42C/W 6-Pin TDFN-EP (derate 23.8mW/C above +70C) ..1904.8mW JA ..............................................................................42C/W JC ................................................................................9C/W 8-Pin SO (derate 7.6mW/C above +70C)...................606.1W JA ............................................................................132C/W JC ..............................................................................38C/W 8-Pin TDFN-EP (derate 24.4mW/C above +70C) ..1951.2mW JA ..............................................................................41C/W JC ................................................................................8C/W Operating Temperature Range .........................-40C to +125C Junction Temperature ......................................................+150C Lead Temperature (soldering, 10s) .................................+300C
Note 1: Operation is limited by thermal limits. Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
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
(VCC = 15V, VEE = -15V, VCM = 0, RL = 10k to GND, GND = 0, TA = -40C to +125C. Typical values are at TA = +25C, unless otherwise noted.) (Note 3)
PARAMETER DC CHARACTERISTICS Operating Supply Voltage Range Quiescent Supply Current per Amplifier Power-Supply Rejection Ratio Input Offset Voltage Input Offset Voltage Drift Input Bias Current Input Offset Current Input Voltage Range Common-Mode Rejection Ratio VSUPPLY ICC PSRR VOS TCVOS IBIAS IOS VIN+ , VINCMRR VEE + 0.3V VCM VCC - 1.8V VEE VCM VCC - 1.8V VEE VCM VCC - 1.8V Guaranteed by CMRR test, TA = -40C to +125C VEE + 0.3V VCM VCC - 1.8V VEE VCM VCC - 1.8V VEE 105 105 125 1 VS = 3V to 19V TA = +25C TA = -40C to +125C 0.4 4 20 90 10 VCC 1.8 105 Guaranteed by PSRR test 3 550 130 20 100 240 19 950 V A dB V V/C nA nA V dB SYMBOL CONDITIONS MIN TYP MAX UNITS
2
_______________________________________________________________________________________
High-Voltage, Precision, Low-Power Op Amps
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 15V, VEE = -15V, VCM = 0, RL = 10k to GND, GND = 0, TA = -40C to +125C. Typical values are at TA = +25C, unless otherwise noted.) (Note 3)
PARAMETER SYMBOL CONDITIONS -13.5V VO +13.5V, RL = 10k, TA = +25C -13.5V VO +13.5V, RL = 10k, TA = -40C to +125C -12V VO +12V, RL = 600, TA = +25C -12V VO +12V, RL = 600, TA = -40C to +85C RL = 10k VOH RL = 600 Output Voltage Swing RL = 10k VOL RL = 600 TA = -40C to +85C Short-Circuit Current AC CHARACTERISTICS Gain Bandwidth Product Slew Rate Input Voltage Noise Density Input Voltage Noise Input Current Noise Density Capacitive Loading GBWP SR en In CLOAD -5V VOUT +5V f = 1kHz f = 1kHz No sustained oscillation 2.4 0.35 17.6 500 0.18 1000 MHz V/s nV/Hz nVP-P pA/Hz pF ISC TA = +25C TA = -40C to +125C 60 100 TA = +25C TA = +25C TA = -40C to +85C MIN 115 100 dB 100 90 VCC 0.2 VCC 1.8 VCC - 2 VEE + 0.1 VEE + 1 VEE + 1.1 V 110 TYP 130 MAX UNITS
MAX9943/MAX9944
Open-Loop Gain
AVOL
mA
TOTAL NOISE 0.1Hz f 10Hz
Note 3: All devices are 100% production tested at TA = +25C. Temperature limits are guaranteed by design.
_______________________________________________________________________________________
3
High-Voltage, Precision, Low-Power Op Amps MAX9943/MAX9944
Typical Operating Characteristics
(VCC = 15V, VEE = -15V, VCM = 0, RL = 10k to GND, GND = 0, TA = +25C, unless otherwise noted.)
INPUT VOLTAGE OFFSET DRIFT HISTOGRAM
MAX9943 toc01 MAX9943 toc02
OFFSET VOLTAGE HISTOGRAM
25 70 60 50 40 30 20 5 10 0 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 OFFSET VOLTAGE (V)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
650 SUPPLY CURRENT (A) 600 550 500 450 400 350
MAX9943 toc03
700
20 FREQUENCY (%)
15
10
0
FREQUENCY (%)
0.1 -0.3 -0.2 -0.1 0 0.2 0.3 -0.25 -0.15 -0.05 0.05 0.15 0.25 VOS DRIFT (V/C)
300 6 10 14 18 22 26 30 34 38 SUPPLY VOLTAGE (V)
SUPPLY CURRENT vs. TEMPERATURE
MAX9943 toc04
OFFSET VOLTAGE vs. SUPPLY VOLTAGE
MAX9943 toc05
800
30 25 OFFSET VOLTAGE (V) 20 15 10 5 0
700 SUPPLY CURRENT (A)
600
500
400
300 -50 -25 0 25 50 75 100 125 TEMPERATURE (C)
6
10
14
18
22
26
30
34
38
SUPPLY VOLTAGE (V)
OFFSET VOLTAGE vs. COMMON-MODE VOLTAGE
MAX9943 toc06
OFFSET VOLTAGE vs. TEMPERATURE
MAX9943 toc07
30 25 OFFSET VOLTAGE (V) 20 15 10 5 0 -14 -10 -6 -2 2 6 10
100 80 OFFSET VOLTAGE (V) 60 40 20 0 -20 -40
14
-50
-25
0
25
50
75
100
125
COMMON-MODE VOLTAGE (V)
TEMPERATURE (C)
4
_______________________________________________________________________________________
High-Voltage, Precision, Low-Power Op Amps
Typical Operating Characteristics (continued)
(VCC = 15V, VEE = -15V, VCM = 0, RL = 10k to GND, GND = 0, TA = +25C, unless otherwise noted.)
INPUT BIAS CURRENT vs. COMMON-MODE VOLTAGE
MAX9943 toc08
MAX9943/MAX9944
INPUT BIAS CURRENT vs. SUPPLY VOLTAGE
MAX9943 toc09
3.0 2.5 INPUT BIAS CURRENT (nA) 2.0 1.5 1.0 0.5 0 -14 -10 -6 -2 2 6 10
3.0 2.5 INPUT BIAS CURRENT (nA) 2.0 1.5 1.0 0.5 0
14
6
10
14
18
22
26
30
34
38
COMMON-MODE VOLTAGE (V)
SUPPLY VOLTAGE (V)
COMMON-MODE REJECTION RATIO vs. FREQUENCY
MAX9943 toc10
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY
140 120 PSRR (dB) 100 80 60 40 20 0 0.001 0.01 0.1 1 10 100 1000 10,000
MAX9943 toc11
140 130 120 CMRR (dB) 110 100 90 80 70 60 0.001 0.01 0.1 1 10 100
160
1000 10,000
FREQUENCY (kHz)
FREQUENCY (kHz)
VOH vs. OUTPUT CURRENT
MAX9943 toc12
VOL vs. OUTPUT CURRENT
MAX9943 toc13
16
-12
15 OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
TA = -40C TA = +25C
-13 TA = +125C
14 TA = +85C 13 TA = +125C
-14
TA = +85C
-15
TA = -40C TA = +25C
12 0 5 10 15 20 25 30 OUTPUT CURRENT (mA)
-16 0 5 10 15 20 25 30 OUTPUT CURRENT (mA)
_______________________________________________________________________________________
5
High-Voltage, Precision, Low-Power Op Amps MAX9943/MAX9944
Typical Operating Characteristics (continued)
(VCC = 15V, VEE = -15V, VCM = 0, RL = 10k to GND, GND = 0, TA = +25C, unless otherwise noted.)
INPUT VOLTAGE NOISE vs. FREQUENCY
MAX9943 toc14
OUTPUT IMPEDANCE vs. FREQUENCY
1000 100 90 INPUT VOLTAGE NOISE (nV/Hz) 80 70 60 50 40 30 20 10 0.01 0.1 1 10 100 1000 10,000 FREQUENCY (kHz) 0 1
OUTPUT IMPEDANCE ()
100
10
1
0.1
10
100
1000
10,000 100,000
FREQUENCY (Hz)
OPEN-LOOP GAIN vs. FREQUENCY
MAX9943 toc16
CAPACITIVE LOAD vs. RESISTIVE LOAD
MAX9943 toc17
140 120 OPEN-LOOP GAIN (dB) 100
100,000
60 40 20 0 -20 10 0.001 0.1 0.00001 1000 10,000 1 0.0001 100 0.01 FREQUENCY (kHz)
CLOAD (pF)
80
10,000
UNSTABLE
1000
STABLE
100 100 1000 10,000 RLOAD () 100,000
SMALL SIGNAL-STEP RESPONSE
LARGE SIGNAL-STEP RESPONSE
MAX9943 toc19
MAX9943 toc18
20mV/div
OUT
OUT 10s/div
1s/div
6
_______________________________________________________________________________________
MAX9943 toc15
1V/div
High-Voltage, Precision, Low-Power Op Amps
Pin Description
MAX9943 6 TDFN-EP 1 -- -- 2 3 -- -- 4 -- -- 5 6 -- MAX9943 8 MAX 6 -- -- 4 3 -- -- 2 -- -- 1, 5, 8 7 -- MAX9944 8 SO/TDFN-EP -- 1 7 4 -- 3 5 -- 2 6 -- 8 -- NAME OUT OUTA OUTB VEE IN+ INA+ INB+ ININAINBN.C. VCC EP Output Output A Output B Negative Power Supply. Bypass with a 0.1F capacitor to ground. Positive Input Positive Input A Positive Input B Negative Input Negative Input A Negative Input B No Connection Positive Power Supply. Bypass with a 0.1F capacitor to ground. Exposed Pad (TDFN Only). Connect to a large ground plane to maximize thermal performance. Not intended as an electrical connection point. FUNCTION
MAX9943/MAX9944
Detailed Description
The MAX9943/MAX9944 are single/dual operational amplifiers designed for industrial applications. They operate from 6V to 38V supply range while maintaining excellent performance. These devices utilize a threestage architecture optimized for low offset voltage and low input noise with only 550A supply current. The devices are unity gain stable with a 1nF capacitive load. These well-matched devices guarantee the high open-loop gain, CMRR, PSRR, and low voltage offset. The MAX9943/MAX9944 provide a wide input/output voltage range. The input terminals of the MAX9943/ MAX9944 are protected from excessive differential voltage with back-to-back diodes. The input signal current is also limited by an internal series resistor. With a 40V differential voltage, the input current is limited to 20mA. The output can swing to the negative rail while delivering 20mA of current, which is ideal for loop-powered system applications. The specifications and operation of the MAX9943/MAX9944 family is guaranteed over the -40C to +125C temperature range.
Application Information
Bias Current vs. Input Common Mode
The MAX9943/MAX9944 use an internal bias current cancellation circuit to achieve very low bias current over a wide input common-mode range. For such a circuit to function properly, the input common mode must be at least 300mV away from the negative supply VEE. The input common mode can reach the negative supply VEE. However, in the region between VEE and VEE + 0.3V, there is an increase in bias current for both inputs.
Capacitive Load Stability
Driving large capacitive loads can cause instability in many op amps. The MAX9943/MAX9944 are stable with capacitive loads up to 1nF. The Capacitive Load vs. Resistive Load graph in the Typical Operating Characteristics gives the stable operation region for capacitive versus resistive loads. Stability with higher capacitive loads can be improved by adding an isolation resistor in series with the op-amp output, as shown in Figure 1. This resistor improves the circuit's phase margin by isolating the load capacitor from the amplifier's output.
_______________________________________________________________________________________
7
High-Voltage, Precision, Low-Power Op Amps MAX9943/MAX9944
Power Supplies and Layout
The MAX9943/MAX9944 can operate with dual supplies from 3V to 19V or with a single supply from +6V to +38V with respect to ground. When used with dual supplies, bypass both VCC and VEE with their own 0.1F capacitor to ground. When used with a single supply, bypass VCC with a 0.1F capacitor to ground. Careful layout technique helps optimize performance by decreasing the amount of stray capacitance at the op amp's inputs and outputs. To decrease stray capacitance, minimize trace lengths by placing external components close to the op amp's pins.
RISO OUTPUT MAX9943 INPUT CL
Figure 1. Capacitive Load Driving Circuit
Output Current Capability
The MAX9943/MAX9944 are capable of driving heavy loads such as the ones that can be found in loop-powered systems for remote sensors. The information is transmitted through 20mA or 4mA-20mA current output across long lines that are terminated with low resistance loads (e.g., 600). The Typical Application Circuit shows the MAX9944 used as a voltage-to-current converter with a current-sense amplifier in the feedback loop. Because of the high output current capability of the MAX9944, the device can be used to directly drive the current-loop. The specifications and operation of the MAX9943/ MAX9944 family is guaranteed over the -40C to +125C temperature range, However, when used in applications with 15V supply voltage (see Figure 3), the capability of driving more than 20mA of current is limited to the -40C to +85C temperature range. Use a lower supply voltage if this current must be delivered at a higher temperature range.
1.5k
1.5k
Figure 2. Input Protection Circuit
Input Differential Voltage Protection
During normal op-amp operation, the inverting and noninverting inputs of the MAX9943/MAX9944 are at essentially the same voltage. However, either due to fast input voltage transients or due to other fault conditions, these pins can be forced to be at two different voltages. Internal back-to-back diodes and series resistors protect the inputs from an excessive differential voltage (see Figure 2). Therefore, IN+ and IN- can be any voltage within the range shown in the absolute maximum rating. Note the protection time is still dependent on the package thermal limits.
Input Common Mode and Output Swing
The MAX9943/MAX9944 input common-mode range can swing to the negative rail VEE. The output voltage can swing to both the positive VCC and the negative VEE rails if the output stage is not heavily loaded. These two features are very important for applications where the MAX9943/ MAX9944 are used with a single-supply (VEE connected to ground). One of the applications that can benefit from these features is when the single-supply op amp is driving an ADC.
Chip Information
PROCESS: BiCMOS
8
_______________________________________________________________________________________
High-Voltage, Precision, Low-Power Op Amps MAX9943/MAX9944
+15V
-15V VREF
RSENSE
DAC
MAX9944
RLOAD
-15V
Figure 3. Typical 20mA Current-Source in Loop-Powered Systems
_______________________________________________________________________________________
9
High-Voltage, Precision, Low-Power Op Amps MAX9943/MAX9944
Pin Configurations
TOP VIEW MAX9943
+ N.C. ININ+ 1 2 3 8 7 6 5 N.C. VCC OUT N.C. OUTA 1 + 8 7 6 5 VCC OUTB INBINB+
MAX9944
INA- 2 INA+ 3
VEE 4
VEE 4
8 MAX
8 SO
TOP VIEW MAX9943
+ OUT 1 *EP 6 VCC OUTA 1 8 7 6 5 VCC OUTB INBINB+
MAX9944
INA- 2 VEE 2 5 N.C. INA+ 3
IN+
3
4
IN-
VEE 4
*EP
TOP VIEW 6 TDFN
NOT TO SCALE. *EP = EXPOSED PAD.
TOP VIEW 8 TDFN
10
______________________________________________________________________________________
High-Voltage, Precision, Low-Power Op Amps
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. PACKAGE TYPE 8 MAX 6 TDFN-EP 8 SO 8 TDFN-EP PACKAGE CODE U8+1 T633+2 S8+4 T833+2 DOCUMENT NO. 21-0036 21-0137 21-0041 21-0137
MAX9943/MAX9944
______________________________________________________________________________________
8LUMAXD.EPS
11
High-Voltage, Precision, Low-Power Op Amps MAX9943/MAX9944
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
12
______________________________________________________________________________________
6, 8, &10L, DFN THIN.EPS
High-Voltage, Precision, Low-Power Op Amps
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
MAX9943/MAX9944
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
PACKAGE VARIATIONS PKG. CODE T633-2 T833-2 T833-3 T1033-1 T1033-2 T1433-1 T1433-2 N 6 8 8 10 10 14 14 D2 1.500.10 1.500.10 1.500.10 1.500.10 1.500.10 1.700.10 1.700.10 E2 2.300.10 2.300.10 2.300.10 2.300.10 2.300.10 2.300.10 2.300.10 e 0.95 BSC 0.65 BSC 0.65 BSC 0.50 BSC 0.50 BSC 0.40 BSC 0.40 BSC JEDEC SPEC MO229 / WEEA MO229 / WEEC MO229 / WEEC MO229 / WEED-3 MO229 / WEED-3 ------b 0.400.05 0.300.05 0.300.05 0.250.05 0.250.05 0.200.05 0.200.05 [(N/2)-1] x e 1.90 REF 1.95 REF 1.95 REF 2.00 REF 2.00 REF 2.40 REF 2.40 REF
0.25 MIN. 0.20 REF.
______________________________________________________________________________________
13
High-Voltage, Precision, Low-Power Op Amps MAX9943/MAX9944
Package Information (continued)
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
SOICN .EPS
INCHES DIM A A1 B C e E H L MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.010 0.007 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050
MILLIMETERS MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.25 0.19 1.27 BSC 3.80 4.00 5.80 6.20 0.40 1.27
N
E
H
VARIATIONS:
1
INCHES
MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC
TOP VIEW
DIM D D D
MIN 0.189 0.337 0.386
MAX 0.197 0.344 0.394
D A e B A1 C 0\-8\ L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL DOCUMENT CONTROL NO.
21-0041
REV.
B
1
1
14
______________________________________________________________________________________
High-Voltage, Precision, Low-Power Op Amps
Revision History
REVISION NUMBER 0 1 2 REVISION DATE 3/09 4/09 6/09 Initial release Removed future product reference for the MAX9944, updated EC table Corrected TOC 13 and added rail-to-rail output feature DESCRIPTION PAGES CHANGED -- 1, 2 1, 3, 5, 8
MAX9943/MAX9944
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15
(c) 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

▲Up To Search▲

Price & Availability of MAX9943ATT

	To Download MAX9943ATT Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .