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Details, datasheet, quote on part number:AD8203
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Datasheet text preview:
High Common-Mode Voltage, Single-Supply Difference Amplifier
Preliminary Technical Data
FEATURES
High common-mode voltage range -12 V to +30 V at a 5 V supply voltage Operating temperature range -40°C to +150°C Supply voltage range: 3.5 V to 12 V Low-pass filter (one pole or two pole)
NC
7
AD8203
FUNCTIONAL BLOCK DIAGRAM
A1
3
A2
4
+VS
6
100k G = ×10 +IN 8 IN 1 200k +IN A1 IN 200k G = ×2 +IN A2 IN
AD8203
AD8200
5
OUT
EXCELLENT AC AND DC PERFORMANCE
±1 mV voltage offset ±1 ppm/°C typ gain drift 77 dB CMRR min dc to 10 kHz
10k
10k
02054-B-001
02054-B-003 02054-B-002
2
PLATFORMS
Transmission control Diesel injection control Engine management Adaptive suspension control Vehicle dynamics control
NC = NO CONNECT
GND
Figure 1. SOIC (R) Package Die Form
GENERAL DESCRIPTION
The AD8203 is a single-supply difference amplifier for amplifying and low-pass filtering small differential voltages in the presence of a large common-mode voltage. The input CMV range extends from -12 V to +30 V at a typical supply voltage of 5 V. The AD8203 is offered in die and packaged form. Both package options are specified over wide temperature ranges, making the AD8203 well suited for use in many automotive platforms. The AD8203 is specified over a temperature range of -40°C to +150°C. Automotive platforms demand precision components for better system control. The AD8203 provides excellent ac and dc performance that keeps errors to a minimum in the user's system. Typical offset and gain drift in the SOIC package are 5 µV/°C and 1 ppm/°C, respectively. The device also delivers a minimum CMRR of 77 dB from dc to 10 kHz. The AD8203 features an externally accessible 100 k resistor at the output of the preamp A1, which can be used for low-pass filter applications and for establishing gains other than 20.
BATTERY
CLAMP DIODE
INDUCTIVE LOAD
+IN NC
5V OUTPUT
+VS OUT
14V 4 TERM SHUNT
AD8200 AD8203
IN GND A1 A2
POWER DEVICE
COMMON
NC = NO CONNECT
Figure 2.High Line Current Sensor
POWER DEVICE 5V OUTPUT
+IN NC +VS OUT
BATTERY
14V 4 TERM SHUNT
AD8200 AD8203
IN GND A1 A2
CLAMP DIODE
INDUCTIVE LOAD
COMMON
NC = NO CONNECT
Rev. PrA
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.
Figure 3. Low Line Current Sensor
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
AD8203 TABLE OF CONTENTS
Specifications--Single Suppy .........3 Absolute Maximum Ratings......5 Pin Configurations And Function Descriptions.......6 ESD Caution........6 Typical Performance Characteristics ........7 Theory of Operation .........9 Applications ..........10 Current Sensing ..........10 Gain Adjustment.........10
Preliminary Technical Data
Gain Trim .......... 11 Low-Pass Filtering ..... 11 High-Line Current Sensing with LPF and Gain Adjustment ............ 12 Driving Charge Redistribution ADCs..........12 Outline Dimensions ....... 13 Ordering Guide...........13
REVISION HISTORY
Rev. PrA | Page 2 of 13
Preliminary Technical Data SPECIFICATIONS--SINGLE SUPPY
TA = +25°C, VS = 5 V, VCM = 0 V, RL = 10 k. Table 1.
Parameter SYSTEM GAIN Initial Error Vs. Temperature VOLTAGE OFFSET Input Offset (RTI) Vs. Temperature INPUT Input Impedance Differential Common-Mode CMV Common Mode Rejection1 Condition AD8203 SOIC Min Typ Max 14 4.8 Vout 0.01 Vdc -0.3 1 VCM = 0.01 V; 25°C -40C -> 125C -40C -> 150C -1 -10 -15 +0.3 20 +1 10 15 -1 25 -1
AD8203
AD8203 DIE Min Typ Max 14 +1 30 +1
Unit V/V % ppm/°C mV µV/°C µV/°C
0.3 5
Continuous VCM = 0V to 10 V f = DC f = 1 kHz f = 10 kHz2
260 135 -12 82 82 77
325 170
390 205 +30
320 160 -2
400 200
480 240 +24
k k V
80 80 7 7 +0.3 4.8 103 -1 0.02 97 +1 4.8 103
dB dB V/V % V k
PREAMPLIFIER Gain Gain Error Output Voltage Range Output Resistance Slew Rate OUTPUT BUFFER Gain Gain Error Output Voltage Range Input Bias Current Output Resistance DYNAMIC RESPONSE System Bandwidth Slew Rate NOISE 0.1 Hz to 10 Hz Spectral Density, 1 kHz, RTI POWER SUPPLY Operating Range Quiescent Current vs. Temperature PSRR TEMPERATURE RANGE For Specified Performance
-0.3 0.01 97
100 TBD 2
100 TBD 2
-0.3 0.01 40 2 Vin =0.01Vdc, Vout = 1Vpp Vin =0.01Vdc, Vout =4v step 30 50 0.28 10 275 3.5 VO = 0.1 V dc VS = 3.5V to 12 V 75 -40 0.25 83
+0.3 4.8
-1 0.02 2 30 45 0.22 10 300
+1 4.8
V/V % V kHz V/µs µV p-p nV/Hz
12 1.0
4.7 0.25 75 80
12 1
V mA dB
+150
-40
+150
°C
1
Source imbalance < 2 .
Rev. PrA | Page 3 of 13
AD8203
2
Preliminary Technical Data
The AD8202 preamplifier exceeds 77 dB CMRR at 10 kHz. However, since the signal is available only by way of a 100 k resistor, even the small amount of pin-to-pin capacitance between Pins 1, 8 and 3, 4 may couple an input common-mode signal larger than the greatly attenuated preamplifier output. The effect of pin-to-pin coupling may be neglected in all applications using filter capacitors at Node 3.
Rev. PrA | Page 4 of 13
Preliminary Technical Data ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter Supply Voltage Transient Input Voltage (300 ms) Continuous Input Voltage Reversed Supply Voltage Protection Operating Temperature Range DIE SOIC Storage Temperature Output Short-Circuit Duration Lead Temperature Range (Soldering 10 sec) Rating 12.5 V 44 V 35 V 0.3 V -40°C to +150°C -40°C to +150°C -65°C to +150°C Indefinate 300°C
AD8203
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other condition s above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Rev. PrA | Page 5 of 13
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