AD8224HBCPZ-RL Analog Devices Inc, AD8224HBCPZ-RL Datasheet

no-image

AD8224HBCPZ-RL

Manufacturer Part Number
AD8224HBCPZ-RL
Description
Hidden Paddle Dual Channel FET InAmp
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD8224HBCPZ-RL

Amplifier Type
J-FET
Number Of Circuits
2
Output Type
Rail-to-Rail
Slew Rate
2 V/µs
-3db Bandwidth
1.5MHz
Current - Input Bias
10pA
Voltage - Input Offset
175µV
Current - Supply
750µA
Current - Output / Channel
15mA
Voltage - Supply, Single/dual (±)
4.5 V ~ 36 V, ±2.25 V ~ 18 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Gain Bandwidth Product
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
Two channels in a small 4 mm × 4 mm LFCSP
Custom LFCSP package with hidden paddle
Low input currents
10 pA maximum input bias current (B Grade)
0.6 pA maximum input offset current (B Grade)
High CMRR
Excellent ac specifications and low power
Versatility
APPLICATIONS
Medical instrumentation
Precision data acquisition
Transducer interfaces
Differential drives for high resolution input ADCs
Remote sensors
GENERAL DESCRIPTION
The AD8224 is the first single-supply, JFET input instrumentation
amplifier available in the space-saving 16-lead, 4 mm × 4 mm
LFCSP. It requires the same board area as a typical single
instrumentation amplifier yet doubles the channel density
and offers a lower cost per channel without compromising
performance.
Designed to meet the needs of high performance, portable
instrumentation, the AD8224 has a minimum common-mode
rejection ratio (CMRR) of 86 dB at dc and a minimum CMRR
of 80 dB at 10 kHz for G = 1. Maximum input bias current is
10 pA and typically remains below 300 pA over the entire
industrial temperature range. Despite the JFET inputs, the
AD8224 typically has a noise corner of only 10 Hz.
With the proliferation of mixed-signal processing, the number
of power supplies required in each system has grown. Designed
Rev. B
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.
Permits routing and vias underneath package
Allows full bias current performance
100 dB CMRR (minimum), G = 10 (B Grade)
90 dB CMRR (minimum) to 10 kHz, G = 10 (B Grade)
1.5 MHz bandwidth (G = 1)
14 nV/√Hz input noise (1 kHz)
Slew rate: 2 V/μs
750 μA quiescent current per amplifier
Rail-to-rail output
Input voltage range to below negative supply rail
4 kV ESD protection
4.5 V to 36 V single supply
±2.25 V to ±18 V dual supply
Gain set with single resistor (G = 1 to 1000)
Rail-to-Rail Instrumentation Amplifier
Precision, Dual-Channel, JFET Input,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Table 1. In Amps and Difference Amplifiers by Category
High
Perform
AD8220
AD8221
AD8222
1
to alleviate this problem, the AD8224 can operate on a ±18 V
dual supply, as well as on a single +5 V supply. The device’s rail-
to-rail output stage maximizes dynamic range on the low
voltage supplies common in portable applications. Its ability to
run on a single 5 V supply eliminates the need for higher
voltage, dual supplies. The AD8224 draws 750 μA of quiescent
current per amplifier, making it ideal for battery powered
devices.
In addition, the AD8224 can be configured as a single-channel,
differential output, instrumentation amplifier. Differential
outputs provide high noise immunity, which can be useful when
the output signal must travel through a noisy environment, such
as with remote sensors. The configuration can also be used to
drive differential input ADCs. For a single-channel version, use
the AD8220.
Rail-to-rail output.
1
Low
Cost
AD8553
AD623
FUNCTIONAL BLOCK DIAGRAM
–IN1
+IN1
R
R
G1
G1
©2007–2010 Analog Devices, Inc. All rights reserved.
1
1
1
2
3
4
AD8224
High
Voltage
AD628
AD629
16
5
Figure 1.
15
6
14
7
Mil
Grade
AD620
AD621
AD524
AD526
AD624
13
8
12
11
10
9
Low
Power
AD627
–IN2
R
R
+IN2
G2
G2
AD8224
www.analog.com
1
Digital
Gain
AD8231
AD8250
AD8251
AD8555
AD8556
AD8557
1
1
1
1

Related parts for AD8224HBCPZ-RL

AD8224HBCPZ-RL Summary of contents

Page 1

FEATURES Two channels in a small 4 mm × LFCSP Custom LFCSP package with hidden paddle Permits routing and vias underneath package Allows full bias current performance Low input currents 10 pA maximum input bias current (B Grade) ...

Page 2

AD8224 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 9 Thermal Resistance ...................................................................... 9 ESD Caution .................................................................................. 9 Pin ...

Page 3

SPECIFICATIONS + − = − REF individual instrumentation amplifier configured for a single-ended output or dual instrumentation amplifiers configured for differential outputs as shown in Figure 63. ...

Page 4

AD8224 Parameter GAIN Gain Range Gain Error 100 G = 1000 Gain Nonlinearity 100 G = 1000 ...

Page 5

+ − = − REF dynamic performance of each individual instrumentation amplifier. Table 3. Dynamic Performance of Each Individual Amplifier—Single-Ended Output Configuration, V Parameter DYNAMIC RESPONSE Small ...

Page 6

AD8224 − 2 25° REF A individual instrumentation amplifier configured for a single-ended output or dual instrumentation amplifiers configured for ...

Page 7

Parameter GAIN Gain Range Gain Error 100 G = 1000 Nonlinearity 100 G = 1000 100 ...

Page 8

AD8224 − 2 25° REF A dynamic performance of each individual instrumentation amplifier. Table 6. Dynamic Performance of Each Individual ...

Page 9

ABSOLUTE MAXIMUM RATINGS Table 8. Parameter Supply Voltage Power Dissipation Output Short-Circuit Current Input Voltage (Common Mode) Differential Input Voltage Storage Temperature Range 2 Operating Temperature Range Lead Temperature (Soldering, 10 sec) Junction Temperature Package Glass Transition Temperature ESD (Human ...

Page 10

AD8224 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS NOTES 1. THE AD8224 COMES IN TWO PACKAGE TYPES—EACH LEAD Table 11. Pin Function Descriptions Pin Number Mnemonic 1 −IN1 +IN1 ...

Page 11

TYPICAL PERFORMANCE CHARACTERISTICS 25° ± =10 kΩ, unless otherwise noted 400 350 300 250 200 150 100 50 0 –40 –20 0 CMRR (µV/V) Figure 4. Typical Distribution of CMRR ( 400 ...

Page 12

AD8224 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 TIME (s) Figure 10. Change in Input Offset Voltage vs. Warmup Time 150 GAIN = 1000 130 GAIN = 100 110 GAIN = 10 90 GAIN ...

Page 13

GAIN = 1000 GAIN = 100 120 GAIN = 10 100 GAIN = 100 1000 10000 FREQUENCY (Hz) Figure 16. CMRR vs. Frequency 160 GAIN = 1000 140 GAIN = 100 120 GAIN ...

Page 14

AD8224 R = 10kΩ LOAD V = ±15V S –10 –8 –6 –4 –2 0 OUTPUT VOLTAGE (V) Figure 22. Gain Nonlinearity 100 R LOAD R = 10kΩ LOAD V = ±15V S –10 –8 –6 –4 –2 ...

Page 15

–1 +125°C –40°C –2 +25°C +85°C NOTES 1. THE AD8224 CAN OPERATE THE NEGATIVE SUPPLY, BUT THE BIAS CURRENT WILL INCREASE SHARPLY. +1 –40°C +25°C +85°C +125°C V – S –1 2 ...

Page 16

AD8224 –1 +125°C – +125°C V – (mA) OUT Figure 34. Output Voltage Swing vs. Output Current 47pF NO LOAD 100pF 20mV/DIV 5µs/DIV XX XX XXX ...

Page 17

XX 5V/DIV 8.1μs TO 0.01% 0.002%/DIV 9.6μs TO 0.001 XXX (X) Figure 40. Large Signal Pulse Response and Settle Time 100 kΩ ± LOAD S REF XX 5V/DIV 58μs ...

Page 18

AD8224 20mV/DIV XXX Figure 46. Small Signal Pulse Response kΩ 100 pF, V LOAD LOAD 20mV/DIV XXX Figure 47. Small Signal Pulse Response 10 kΩ ...

Page 19

SOURCE GAIN = 1000 V = 20V p-p OUT 160 THERMAL CROSSTALK 140 VARIES WITH LOAD 120 GAIN = 1 100 100 1k 10k FREQUENCY (Hz) Figure 52. Channel Separation vs. Frequency ...

Page 20

AD8224 THEORY OF OPERATION +V S NODE A 24.7kΩ + –V PINCH S I The AD8224 is a JFET input, monolithic instrumentation amplifier based on the classic three op amp topology (see Figure 55). ...

Page 21

Table 12. Gains Achieved Using 1% Resistors 1% Standard Table Value of R (Ω) G 49.9 k 12.4 k 5.49 k 2.61 k 1.00 k 499 249 100 49.9 The AD8224 defaults when no gain resistor ...

Page 22

AD8224 Because the AD8224 dissipates little power, heat dissipation is rarely an issue. If improved heat dissipation is desired (for example, when driving heavy loads), connect the exposed pad to the positive supply rail. For the best heat dissipation performance, ...

Page 23

For applications where the AD8224 encounters extreme overload voltages cardiac defibrillators, external series resistors and low leakage diode clamps, such as BAV199Ls, FJH1100s, or SP720s, should be used. INCORRECT +V S AD8224 REF –V S TRANSFORMER +V S ...

Page 24

AD8224 APPLICATIONS INFORMATION DRIVING AN ADC An instrumentation amplifier is often used in front of an ADC to provide CMRR and additional conditioning such as a voltage level shift and gain (see Figure 62). In this example, a 2.7 nF ...

Page 25

NPO 1kΩ 5% +IN 1000pF 1kΩ –IN 100pF NPO 5% 10µF 0.1µF + DRIVING A DIFFERENTIAL INPUT ADC The AD8224 can be configured in differential output mode to drive a differential ADC. Figure 65 illustrates several ...

Page 26

AD8224 OUTLINE DIMENSIONS PIN 1 INDICATOR 12° MAX 1.00 0.85 0.80 SEATING PLANE PIN 1 INDICATOR 1.00 0.85 0.80 SEATING PLANE 4.00 0.60 MAX BSC 3.75 EXPOSED BSC SQ PAD 0. BSC TOP VIEW 1.95 ...

Page 27

... AD8224HACPZ-R7 −40°C to +85°C AD8224HACPZ-RL −40°C to +85°C AD8224HACPZ-WP −40°C to +85°C AD8224HBCPZ-R7 −40°C to +85°C AD8224HBCPZ-RL −40°C to +85°C AD8224HBCPZ-WP −40°C to +85°C AD8224-EVALZ RoHS Compliant Part. Product Description 16-Lead LFCSP_VQ ...

Page 28

AD8224 NOTES ©2007–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06286-0-5/10(B) Rev Page ...

Related keywords