AD824ARZ-14 Analog Devices Inc, AD824ARZ-14 Datasheet - Page 12

• Manufacturer Part Number: AD824ARZ-14
• Description: IC OPAMP JFET R-R 2MHZ LP 14SOIC
• Manufacturer: Analog Devices Inc

Specifications of AD824ARZ-14

• Slew Rate: 2 V/µs
• Amplifier Type: J-FET
• Number Of Circuits: 4
• Output Type: Rail-to-Rail
• Gain Bandwidth Product: 2MHz
• -3db Bandwidth: 2MHz
• Current - Input Bias: 4pA
• Voltage - Input Offset: 500µV
• Current - Supply: 560µA
• Current - Output / Channel: 12mA
• Voltage - Supply, Single/dual (±): 3 V ~ 30 V, ±1.5 V ~ 15 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Op Amp Type: Low Power
• No. Of Amplifiers: 4
• Bandwidth: 2MHz
• Supply Voltage Range: 3V To 30V
• Amplifier Case Style: SOIC
• No. Of Pins: 14
• Operating Temperature Range: -40°C To +85°C
• Rail/rail I/o Type: Rail to Rail Output
• Number Of Elements: 4
• Unity Gain Bandwidth Product: 2MHz
• Common Mode Rejection Ratio: 60dB
• Input Offset Voltage: 1@5VmV
• Input Bias Current: 12pA
• Single Supply Voltage (typ): 5/9/12/15/18/24/28V
• Dual Supply Voltage (typ): ±3/±5/±9/±12V
• Voltage Gain In Db: 120dB
• Power Supply Rejection Ratio: 70dB
• Power Supply Requirement: Single/Dual
• Shut Down Feature: No
• Single Supply Voltage (min): 3V
• Single Supply Voltage (max): 30V
• Dual Supply Voltage (min): ±1.5V
• Dual Supply Voltage (max): ±15V
• Technology: BiCOM
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 14
• Package Type: SOIC N
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

AD824
APPLICATIONS
Single Supply Voltage-to-Frequency Converter
The circuit shown in Figure 4 uses the AD824 to drive a low
power timer, which produces a stable pulse of width t
positive going output pulse is integrated by R1-C1 and used as
one input to the AD824, which is connected as a differential
integrator. The other input (nonloading) is the unknown voltage,
V
the overall feedback loop.
Typical AD824 bias currents of 2 pA allow megaohm-range
source impedances with negligible dc errors. Linearity errors on
the order of 0.01% full scale can be achieved with this circuit.
This performance is obtained with a 5 V single supply, which
delivers less than 3 mA to the entire circuit.
Single Supply Programmable Gain Instrumentation Amplifier
The AD824 can be configured as a single supply instrumenta-
tion amplifier that is able to operate from single supplies down
to 5 V or dual supplies up to ± 15 V. AD824 FET inputs’ 2 pA
bias currents minimize offset errors caused by high unbalanced
source impedances.
An array of precision thin-film resistors sets the in amp gain to
be either 10 or 100. These resistors are laser-trimmed to ratio
match to 0.01% and have a maximum differential TC of 5 ppm/∞C.
Figure 4. Single Supply Voltage-to-Frequency Converter
IN
0V TO 2.5V
FULL SCALE
C5
0.1 F
. The AD824 output drives the timer trigger input, closing
3
10V
499k , 1%
499k , 1%
0.01 F, 2%
4
2
R1
6
5
V
REF02
REF
R2
C2
U4
10k
R
= 5V
SCALE
NOTES
* = 1% METAL FILM, <50ppm/ C TC
** = 10%, 20T FILM, <100ppm/ C TC
f
t
OUT
1
= 33 s FOR f
**
U1
AD824
= V
= 25kHz f
1/4
IN
0.01 F, 2%
CMOS
74HCO4
4
/(VREF
U3B
C1
S
OUT
AS SHOWN.
3
390pF
(NPO)
116k
t
= 20kHz @ V
1
U3A
),
2
R3*
5%
C6
t
1
= 1.1
1
6
2
7
THR
TR
DIS
IN
R3
R
= 2.0V
GND
4
U2
CMOS 555
1
C6
V+
OUT
CV
0.1 F
8
C3
0.1 F
C4
3
5
1
. The
OUT2
OUT1
–12–
Parameters
CMRR
Common-Mode
3 dB BW, G = 10
t
Noise @ f = 1 kHz, G = 10
V
V
SETTLING
IN1
IN2
Voltage Range
2 V Step (V
5 V (V
V
Input Signal; V
Figure 5a. Pulse Response of In Amp to a 500 mV p-p
REF
1k
R
P
S
Figure 5b. A Single Supply Programmable
Instrumentation Amplifier
= ± 5 V)
(G = 10) V
FOR R1 = R6, R2 = R5 AND R3 = R4
G = 100
(G = 100) V
1k
90k
R
G = 10
R1
P
Table I. AD824 In Amp Performance
S
100
0%
90
10
= 0 V, 3 V)
3
2
AD824
OUT
9k
OUT
R2
+V
S
1/4
G = 100
S
= (V
= 5 V, 0 V; Gain = 10
= (V
G = 100
IN1
1k
IN1
0.1 F
R3
– V
1
1V
– V
IN2
IN2
) (1+
G = 100
1k
) (1+
R4
V
74 dB
–0.2 V to +2 V –5.2 V to +4 V
180 kHz
18 kHz
2 ms
270 nV/÷Hz
2.2 mV/÷Hz
S
R4 + R5
R5 + R6
= 3 V, 0 V
5
6
R6
R4
AD824
9k
R5
1/4
) + V
) + V
5µs
G = 10
11
REF
90k
REF
R6
7
80 dB
V
180 kHz
18 kHz
5 ms
270 nV/÷Hz
2.2 mV/÷Hz
S
= 5 V
V
OHMTEK
PART # 1043
OUT
REV. C