AD8253 Datasheet, PDF (1/10 Pages) Analog Devices – 10 MHz, 20 V/μs, G = 1, 10, 100, 1000 i CMOS® Programmable Gain Instrumentation Amplifier

10 MHz, 20 V/μs, G = 1, 10, 100, 1000 i CMOS^®
Programmable Gain Instrumentation Amplifier
Preliminary Technical Data
AD8253
FEATURES
Small package: 10-lead MSOP
Programmable gains: 1, 10, 100, 1000
Digital or pin-programmable gain setting
Wide supply: ±5 V to ±15 V
Excellent dc performance
High CMRR 120 dB , G = 100
Low gain drift: 10 ppm/°C
Low offset drift: 1.2 μV/°C , G = 1000
Excellent ac performance
Fast settling time: 615 ns to 0.001%
High slew rate: 20 V/μs
Low distortion:
High CMRR over frequency: 80 dB to 50 kHz
Low noise: 8 nV/√Hz, G = 1000
Low power: 4 mA
APPLICATIONS
Data acquisition
Biomedical analysis
Test and measurement
GENERAL DESCRIPTION
The AD8253 is an instrumentation amplifier with digitally
programmable gains that has GΩ input impedance, low output
noise, and low distortion making it suitable for interfacing with
sensors and driving high sample rate analog-to-digital converters
(ADCs). It has high bandwidth of 10 MHz, low THD and fast
settling time of 615 ns to 0.001%. Offset drift and gain drift are
specified to 1.2 μV/°C and 10 ppm/°C, respectively for G = 1000.
In addition to its wide input common voltage range, it boasts a
high common-mode rejection of 80 dB at G = 1 from dc to
50 kHz. The combination of precision dc performance coupled
with high speed capabilities make the AD8253 an excellent
candidate for data acquisition. Furthermore, this monolithic
solution simplifies design and manufacturing, and boosts
performance of instrumentation by maintaining a tight match
of internal resistors and amplifiers.
The AD8253 user interface consists of a parallel port that allows
users to set the gain in one of two different ways (see Figure 1
for the functional block diagram). A 2-bit word sent via a bus
can be latched using the WR input. An alternative is to use
transparent gain mode where the state of logic levels at the gain
port determines the gain.
FUNCTIONAL BLOCK DIAGRAM
DGD WR
A1
A0
-IN
Logic
OUT
+IN
+VS
AD8253
-VS
REF
Figure 1.
Table 1. Instrumentation and Difference Amplifiers by
Category
High
Low
Performance Cost
High
Mil
Low
Digital
Voltage Grade Power Gain
AD8220¹
AD623¹ AD628 AD620 AD627¹ AD8231¹
AD8221
AD8553¹ AD629 AD621
AD8250
AD8222
AD524
AD8251
AD8224¹
AD526
AD8555¹
AD624
AD8556¹
AD8557¹
1 _{Rail-to-rail output.}
The AD8253 is available in a 10-lead MSOP package and is
specified over the −40°C to +85°C temperature range, making it
an excellent solution for applications where size and packing
density are important considerations.
Rev. prA
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