Datasheet

LT1228
5
1228fd
TYPICAL PERFORMANCE CHARACTERISTICS
Total Harmonic Distortion
vs Input Voltage
Spot Output Noise Current
vs Frequency
Input Common Mode Limit
vs Temperature
Small-Signal Control Path
Bandwidth vs Set Current
Small-Signal Control Path
Gain vs Input Voltage
Output Saturation Voltage
vs Temperature
Small-Signal Bandwidth
vs Set Current
Small-Signal Transconductance
and Set Current vs Bias Voltage
Small-Signal Transconductance
vs DC Input Voltage
Transconductance Amplifier, Pins 1, 2, 3, 5
SET CURRENT (µA)
10
0.1
–3dB BANDWIDTH (MHz)
1
10
100
100 1000
LT1228 • TPC01
R1 = 100k
R1 = 10k
R1 = 1k
R1 = 100Ω
V
S
= ±15V
BIAS VOLTAGE, PIN 5 TO 4, (V)
0.01
TRANSCONDUCTANCE (µA/mV)
0.1
1
10
100
0.9 1.2 1.3 1.5
LT1228 • TPC02
0.001
1.0 1.1 1.4
V
S
= ±2V TO ±15V
T
A
= 25°C
1.0
10
100
1000
10000
0.1
SET CURRENT (µA)
INPUT VOLTAGE (mVDC)
–200
0
TRANSCONDUCTANCE (µA/mV)
0.2
0.4
1.4
2.0
–150 –100 –50 200
LT1228 • TPC03
0 100 150
1.8
1.6
1.2
0.6
0.8
–55°C
V
S
= ±2V TO ±15V
I
SET
= 100µA
50
1.0
25°C
125°C
INPUT VOLTAGE (mV
P–P
)
1
0.01
OUTPUT DISTORTION (%)
0.1
1
10
10 1000
LT1228 • TPC04
I
SET
= 100µA
V
S
= ±15V
I
SET
= 1mA
100
FREQUENCY (Hz)
10
10
SPOT NOISE (pA/√Hz)
100
1000
1k 100k
LT1228 • TPC05
V
S
= ±2V TO ±15V
T
A
= 25°C
100 10k
I
SET
= 1mA
I
SET
= 100µA
TEMPERATURE (°C)
–50
V
–
COMMON MODE RANGE (V)
0.5
1.0
–1.5
V
+
–25 0 25 125
LT1228 • TPC06
50 75 100
–0.5
–1.0
–2.0
1.5
2.0
V
–
= –2V TO –15V
V
+
= 2V TO 15V
SET CURRENT (µA)
10
1
–3dB BANDWIDTH (MHz)
10
100
100 1000
LT1228 • TPC07
V
S
= ±2V TO ±15V
V
IN
= 200mV
(PIN 2 TO 3)
∆I
OUT
∆I
SET
INPUT VOLTAGE, PIN 2 TO 3, (mVDC)
0
0
CONTROL PATH GAIN (µA/µA)
1.0
120 200
LT1228 • TPC08
∆I
OUT
∆I
SET
40 80 160
0.2
0.4
0.6
0.8
0.9
0.7
0.5
0.3
0.1
TEMPERATURE (°C)
–50
V
–
OUTPUT SATURATION VOLTAGE (V)
+0.5
+1.0
–1.0
V
+
–25 0 25 125
LT1228 • TPC09
50 75 100
–0.5
±2V ≤ V
S
≤ ±15V
R1 =
∞