Datasheet

LTC2977
11
2977fa
For more information www.linear.com/LTC2977
TYPICAL PERFORMANCE CHARACTERISTICS
DAC Full-Scale Output Voltage vs
Temperature
TEMPERATURE (°C)
DAC OUTPUT VOLTAGE (V)
2.68
2.67
2.66
2.65
2.64
2.63
2.62
2.61
2.60
2977 G11
–50 50
10
90
110
–30
–10
30 70
GAIN SETTING = 1
THREE TYPICAL PARTS
ADC High Resolution Mode
Differential Input Current
DIFFERENTIAL INPUT VOLTAGE (mV)
0
0
DIFFERENTIAL INPUT CURRENT (nA)
10
30
40
50
120 140 160
90
2977 G10
20
60
20
80
40
100
180
60
70
80
DAC Offset Voltage vs
Temperature
TEMPERATURE (°C)
DAC OUTPUT VOLTAGE (mV)
10
8
6
4
2
0
–2
–4
–6
–8
–10
2977 G12
–50 50
10
90
110
–30
–10
30 70
GAIN SETTING = 1
THREE TYPICAL PARTS
DAC Short-Circuit Current vs
Temperature
TEMPERATURE (°C)
4
SHORT-CIRCUIT CURRENT (mA)
6
8
10
5
7
9
2977 G13
–50 50
10
90
110
–30
–10
30 70
GAIN SETTING = 1
THREE TYPICAL PARTS
DAC Output Impedance vs
Frequency Closed-Loop Servo Accuracy
FREQUENCY (kHz)
0.01
OUTPUT IMPEDANCE (Ω)
10
100
1000
100
2977 G14
1
0.1
0.01
0.1
1
10
1000
DAC Transient Response to 1LSB
DAC Code Change
DAC Soft-Connect Transient
Response when Transitioning from
Hi-Z State to ON State
DAC Soft-Connect Transient
Response when Transitioning from
ON State to Hi-Z State
10mV/DIV
500µs/DIV
100k SERIES RESISTANCE ON
CODE: ‘h1FF
2977
G16
HI-Z
CONNECTED
10mV/DIV
500µs/DIV
100k SERIES RESISTANCE ON
CODE: ‘h1FF
2977
G17
CONNECTED
HI-Z
500µV/DIV
2µs/DIV
2977
G15
CODE ‘h1FF
CODE ‘h200
ERROR (%)
–0.25
NUMBER OF PARTS
60
80
100
0.15
2977 G25
40
20
50
70
90
30
10
0
–0.15
–0.05
0.05
0.25