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AD8421TRMZ-EP

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
Enhanced Product AD8421-EP
Rev. 0 | Page 7 of 20
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
TOP VIEW
(Not to Scale)
–IN
1
R
G
2
R
G
3
+IN
4
+V
S
8
V
OUT
7
REF
6
–V
S
5
AD8421-EP
11139-002
Figure 3. Pin Configuration
Table 4. Pin Function Descriptions
Pin No. Mnemonic Description
1 −IN Negative Input Terminal.
2, 3 R
G
Gain Setting Terminals. Place resistor across the R
G
pins to set the gain. G = 1 + (9.9 kΩ/R
G
).
4 +IN Positive Input Terminal.
5 −V
S
Negative Power Supply Terminal.
6 REF Reference Voltage Terminal. Drive this terminal with a low impedance voltage source to level shift the output.
7 V
OUT
Output Terminal.
8 +V
S
Positive Power Supply Terminal.
AD8421-EP Enhanced Product
Rev. 0 | Page 8 of 20
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, V
S
= ±15 V, V
REF
= 0 V, R
L
= 2 kΩ, unless otherwise noted.
600
0
100
200
300
400
500
–60 –40 –20 20 40060
UNITS
INPUT OFFSET VOLTAGE (µV)
11139-003
Figure 4. Typical Distribution of Input Offset Voltage
1800
0
300
600
900
1200
1500
–2.0 –1.5 1.51.0–1.0 –0.5 0 0.5 2.0
UNITS
INPUT BIAS CURRENT (nA)
11139-004
Figure 5. Typical Distribution of Input Bias Current
1400
0
200
400
600
800
1200
1000
–20 –15 1510–10 –5 0 5 20
UNITS
PSRR (µV/V)
11139-005
Figure 6. Typical Distribution of PSRR (G = 1)
600
0
100
200
300
400
500
–400 –300 300200–200 –100 0 100 400
UNITS
OUTPUT OFFSET VOLTAGE (µV)
11139-006
Figure 7. Typical Distribution of Output Offset Voltage
800
1000
1200
600
0
200
400
–2.0 –1.5 –1.0 –0.5 0.5 1.0 1.502.0
UNITS
INPUT OFFSET CURRENT (nA)
11139-007
Figure 8. Typical Distribution of Input Offset Current
600
800
1000
1200
1400
1600
0
200
400
–120 1209060300–30–60–90
UNITS
CMRR (µV/V)
11139-008
Figure 9. Typical Distribution of CMRR (G = 1)
Enhanced Product AD8421-EP
Rev. 0 | Page 9 of 20
15
10
5
0
–15
–10
–5
–15 15105–5–10 0
COMMON-MODE VOLTAGE (V)
OUTPUT VOLTAGE (V)
V
S
= ±15V
V
S
= ±12V
G = 1
11139-009
Figure 10. Input Common-Mode Voltage vs. Output Voltage;
V
S
= ±12 V and ±15 V (G = 1)
4
3
2
0
1
–3
–2
–1
–4 4321–3 –2 –1 0
COMMON-MODE VOLTAGE (V)
OUTPUT VOLTAGE (V)
V
S
= ±5V
V
S
= ±2.5V
G = 1
11139-010
Figure 11. Input Common-Mode Voltage vs. Output Voltage;
V
S
= ±2.5 V and ±5 V (G = 1)
15
10
5
0
–15
–10
–5
–15 15105–5–10 0
COMMON-MODE VOLTAGE (V)
OUTPUT VOLTAGE (V)
V
S
= ±15V
V
S
= ±12V
G = 100
11139-011
Figure 12. Input Common-Mode Voltage vs. Output Voltage;
V
S
= ±12 V and ±15 V (G = 100)
4
3
2
0
1
–4
–3
–2
–1
–4 4321–3 –2 –1 0
COMMON-MODE VOLTAGE (V)
OUTPUT VOLTAGE (V)
V
S
= ±5V
V
S
= ±2.5V
G = 100
11139-012
Figure 13. Input Common-Mode Voltage vs. Output Voltage;
V
S
= ±2.5 V and ±5 V (G = 100)
40
–40
–35 40
INPUT CURRENT (mA)
INPUT VOLTAGE (V)
–30
–20
–10
0
10
20
30
–30–25–20–15–10–5 0 5 101520253035
V
S
= 5V
G = 1
11139-013
Figure 14. Input Overvoltage Performance; G = 1, +V
S
= 5 V, −V
S
= 0 V
30
–30
–25 25
INPUT CURRENT (mA)
INPUT VOLTAGE (V)
–20
–10
0
10
20
–20 –15 –10 –5 0 5 10 15 20
V
S
= ±15V
G = 1
11139-014
Figure 15. Input Overvoltage Performance; G = 1, V
S
= ±15 V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

AD8421TRMZ-EP

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Instrumentation Amplifiers 3nV/vHz noise Precision InAmp
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