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AD215BY

P1-P3P4-P6P7-P9P10-P12P13-P13
AD215
REV. 0
–3–
AD215AY/BY
Parameter Conditions Min Typ Max Units
DYNAMIC RESPONSE (2 kΩ Load) Cont.
Settling Time to ±0.10%, ±10 V Output Swing 9 µs
Overshoot 1%
Harmonic Distortion Components @ 1 kHz –80 dB
@ 10 kHz –65 dB
Overload Recovery Time G = 1 V/V, ±15 V Drive 5 µs
Output Overload Recovery Time G > 5 10 µs
RATED OUTPUT
Voltage Out HI to Out LO ±10 V
Current 2 kΩ Load ±5mA
Max Capacitive Load 500 pF
Output Resistance 1 Ω
Output Ripple and Noise
7
1 MHz Bandwidth 10 mV pk-pk
50 kHz Bandwidth 2.5 mV pk-pk
ISOLATED POWER OUTPUT
8
Voltage No Load ±14.25 ±15 ±17.25 V
vs. Temperature 0°C to +85°C +20 mV/°C
–40°C to 0°C +25 mV/°C
Current at Rated Supply Voltage
2, 9
±10 mA
Regulation No Load to Full Load –90 mV/V
Line Regulation 290 mV/V
Ripple 1 MHz Bandwidth, No Load
2
50 mV rms
POWER SUPPLY
Supply Voltage Rated Performance ±14.5 ±15 ±16.5 V dc
Operating
10
±14.25 ±17 V dc
Current Operating (+15 V dc/–15 V dc Supplies) +40/–18 mA
TEMPERATURE RANGE
Rated Performance –40 +85 °C
Storage –40 +85 °C
NOTES
11
The gain range of the AD215 is specified from 1 to 10 V/V. The AD215 can also be used with gains of up to 100 V/V. With a gain of 100 V/V a 20% reduction in the
–3 dB bandwidth specification occurs and the nonlinearity degrades to ±0.02% typical.
12
When the isolated supply load exceeds ±1 mA, external filter capacitors are required in order to ensure that the gain, offset, and nonlinearity specifications are pre-
served and to maintain the isolated supply full load ripple below the specified 50 mV rms. A value of 6.8 µF is recommended.
13
Nonlinearity is specified as a percent (of full-scale range) deviation from a best straight line.
14
The isolation barrier (and rating) of every AD215 is 100% tested in production using a 5 second partial discharge test with a failure detection threshold of 150 pC. All
“B” grade devices are tested with a minimum voltage of 1,800 V rms. All “A” grade devices are tested with a minimum voltage of 850 V rms.
15
The AD215 should be allowed to warm up for approximately 10 minutes before any gain and/or offset adjustments are made.
16
Equivalent to a 0.8 degrees phase shift.
17
With the ±15 V dc power supply pins bypassed by 2.2 µF capacitors at the AD215 pins.
18
Caution: The AD215 design does not provide short circuit protection of its isolated power supply. A current limiting resistor may be placed in series with the isolated
power terminals and the load in order to protect the supply against inadvertent shorts.
19
With an input power supply voltage greater than or equal ±15 V dc, the AD215 may supply up to ±15 mA from the isolated power supplies.
10
Voltages less than 14.25 V dc may cause the AD215 to cease operating properly. Voltages greater than ±17.5 V dc may damage the internal components of the
AD215 and consequently should not be used.
Specifications subject to change without notice.
WARNING!
ESD SENSITIVE DEVICE
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD215 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
AD215
REV. 0
–4–
OUT HI
TRIM
OUT LO
+15V
IN
–15V
IN
PWR RTN
AD215
SIGNAL
1
3
UNCOMMITTED
INPUT OP AMP
FB
IN–
IN+
POWER
T2
T1
33kΩ
R
R
0.01µF
OUTPUT
BUFFER
IN COM
+V
ISO
–V
ISO
MODULATOR
DEMODULATOR
LOW-PASS
FILTER
150kHz
37
36
38
42
44
43
430kHz
POWER
OSCILLATOR
6
2
5
ISOLATED
DC
SUPPLY
4
Figure 1. Functional Block Diagram
PIN CONFIGURATIONS
36 38
37
42
44
43
BOTTOM VIEW OF
FOOTPRINT
4
6
2
3
5
1
AD215 PIN DESIGNATIONS
Pin Designation Function
1 IN+ Noninverting Input
2 IN COM Input Common
3 IN– Inverting Input
4 FB Amplifier Feedback
5–V
ISO
OUT Isolated –15 V dc Power Supply
6+V
ISO
OUT Isolated +15 V dc Power Supply
36 TRIM Output Offset Trim Adjust
37 OUT LO Output Low
38 OUT HI Output High
42 +15 V
IN
+15 V dc Power
43 PWR RTN ±15 V dc Power Supply Common
44 –15 V
IN
–15 V dc Power
ORDERING GUIDE
Model Temperature Range V
CMV
Nonlinearity
*
AD215AY –40°C to +85°C 750 0.01%
AD215BY –40°C to +85°C 1500 0.005%
*Typical @ +25°C, G = 1 V/V.
INSIDE THE AD215
The AD215 is a fully self-contained analog signal and power
isolation solution. It employs a double-balanced amplitude
modulation technique to perform transformer coupling of sig-
nals ranging in frequency from true dc values to those having
frequencies of 120 kHz or less.
To generate the power supplies used for the isolated front-end
circuitry, an internal clock oscillator drives the primary winding
of the integral dc/dc power supply’s transformer, T2. The
resultant voltage developed across the secondary winding is
then rectified and filtered for use as the isolated power supply.
This built-in isolated dc/dc converter provides sufficient power
for both the internal isolated circuit elements of the AD215 as
well as any ancillary components supplied by the user. It saves
onboard space and component cost where additional amplifica-
tion or signal conditioning is required.
After an input signal is amplified by the uncommitted op amp,
it is modulated at a carrier frequency of approximately 430 kHz
and applied across the primary winding of the signal isolation
transformer T1.
The resultant signal induced on the secondary winding of the
transformer is then demodulated and filtered using a low-pass
Bessel response filter set at a frequency of 150 kHz. The func-
tion of the filter reconstructs the original signal as it appears on
the input.
The signal transformer design and construction allow non-
linearity to be independent of both the specified temperature
and gain ranges.
After complete reconstruction, the signal is subjected to an off-
set trim stage and final output buffer. The trim circuit allows
the designer flexibility to adjust for any offset as desired.
Performance Characteristics–AD215
REV. 0
–5–
TEMPERATURE – °C
GAIN ERROR – %
0.10
–0.25
–40 100–200 20406080
0.05
–0.05
–0.10
–0.15
–0.20
0
Figure 2. Gain Error vs. Temperature
10
0%
100
90
1mV
+1
0
–1
+0.004
–0.004
–10 –8 –6 –4 –2 0 2 4 6 8 10
NONLINEARITY – mV
NONLINEARITY – %
OUTPUT VOLTAGE – Volts
Figure 3. Gain Nonlinearity vs. Output Voltage (G = 1 V/V)
FREQUENCY – Hz
150
140
60
10 100k100
CMR – dB
1k 10k
130
120
110
100
90
80
70
R
S
≤ 100Ω
R
S
≤ 1kΩ
Figure 4. Typical Common-Mode Rejection vs. Frequency
INPUT SIGNAL FREQUENCY – kHz
1
0
–12
0.1 10001.0
GAIN – dB
10 100
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
–11
G = 100
G = 10
G = 1
Figure 5. Normalized Gain as a Function of Signal
Frequency
3
2
1
0
0
45
90
130
10 20 30 40 50 60 70 80 90 100 110 120
FREQUENCY – kHz
G = 100
G =10
G = 1
G = 100
G =10
G = 1
PHASE SHIFT – Degrees
TRANSPORT
DELAY – µs
Figure 6. Phase Shift and Transport Delay vs. Frequency
P1-P3P4-P6P7-P9P10-P12P13-P13

AD215BY

Mfr. #:
Buy AD215BY
Manufacturer:
Analog Devices Inc.
Description:
Isolation Amplifiers 100KHz Bandwidth Iso AMP IC
Lifecycle:
New from this manufacturer.
Delivery:
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