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参数资料
| 型号： | 4127 |
| 厂商： | Texas Instruments, Inc. |
| 元件分类： | 对数放大器 |
| 英文描述： | Logarithmic Amplifier(对数放大器) |
| 中文描述： | 对数放大器（对数放大器） |
| 文件页数： | 2/8页 |
| 文件大小： | 107K |
| 代理商： | 4127 |
2
4127
SPECIFICATIONS
ELECTRICAL
Typical Specifications at +25
°C with rated supplies, unless otherwise noted.
PIN CONFIGURATION
Top View
No Pin Present
I
REFBias
Postive Supply
Common
No Pin Present
Gain Adjust
Log Output
No Pin Present
Negative Supply
NC
I
REF Output
I
REF Input
No Pin Present
+I Input
(1)
Current Inverter Output
(1)
No Pin Present
Current Inverter Input
No Pin Present
Op Amp + Input
Op Amp –Input
Op Amp Output
No Pin Present
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
NOTE: (1) Pins 4 and 5 are internally connected.
NOTE: (1) Log conformity at 25
°C.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN
assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject
to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not
authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.
MODEL
4127KG
4127JG
ACCURACY(1), % of FSR
Current Source Input: 1nA to 1mA
0.5% max
1% max
Voltage Input: 1mV to 10V
0.5% max
1% max
INPUT
Current Source Input, Pin 4
+1nA to +1mA
Current Source Input, Pin 7
–1nA to –1mA
Reference Current Input, Pin 2
+1
A to +1mA
Absolute Maximum Inputs
±10mA or ±Supply Volts
OUTPUT
Voltage
±10V
Current
±5mA
Impedance
10
FREQUENCY RESPONSE
–3dB Small Signal at Current Input
of 100
A
90kHz
of 10
A
50kHz
of 1
A
5kHz
of 100nA
250Hz
of 10nA
80Hz
Step Response to within
±1% of
Final Value (IR = 1A, A = 5)
10ms
STABILITY
Scale Factor Drift (
A/°C)
±0.0005A/°C
Reference Current Drift (
I
R/°C)
±0.001 I
R/°C for IR ≥ 1A
±0.003 I
R/°C for 400nA < IR < 1A
Input Offset Current Drift (
I
S/°C)
10pA at +25
°C, Doubles Every 10°C
Input Offset Voltage Drift
±10V/°C
Accuracy vs Supply Variation
Reference Current
±0.001I
R/V
Input Offset Voltage
±300V/V
Input Noise - Current Input
1pA, rms, 10Hz to 10kHz
Input Noise - Voltage Input
10
A, rms, 10Hz to 10kHz
UNCOMMITTED OP AMP CHARACTERISTICS
Input Offset Voltage
5mV
Input Bias Current
40nA
Input Impedance
1M
Large Signal Voltage Gain
85dB
Output Current
5mA
TEMPERATURE RANGE
Specification
0
°C to +60°C
Operating
–10
°C to +70°C
Storage
–55
°C to +125°C
POWER SUPPLY REQUIREMENTS
Rated Supply Voltages
±15VDC
Supply Voltage Range
±14VDC to ±16VDC
Supply Current Drain
at Quiescent, max
±20mA
at Full Load, max
±26mA
PACKAGE INFORMATION
PACKAGE DRAWING
MODEL
PACKAGE
NUMBER(1)
4127KG
24-Pin
075
4127JG
24-Pin
075
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.
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