Linear Technology DC979A - LTC2442CG 24-Bit Buffered Delta Sigma ADC (req DC590) DC979A DC979A Data Sheet
Product codes
DC979A
LTC2442
32
2442fa
For more information
PART NUMBER
DESCRIPTION
COMMENTS
Micropower Thermocouple Cold Junction Compensator
80µA Supply Current, 0.5°C Initial Accuracy
Dual Precision Instrumentation Switched Capacitor Building
Block
Precise Charge, Balanced Switching, Low Power
Precision Chopper Stabilized Op Amp
No External Components 3µV Offset, 1.5µV
P-P
Noise
Precision Bandgap Reference, 5V
0.05% Max, 5ppm/°C Drift
Micropower Series Reference, 2.5V
0.04% Max, 3ppm/°C Max Drift
Ultraprecise 16-Bit SoftSpan
TM
DAC
Six Programmable Output Ranges
Resistor Set SOT-23 Oscillator
Single Resistor Frequency Set
100mA Charge Pump
5V to Regulated –5V Conversion
Rail-to-Rail Instrumentation Amplifier
10µV Offset with 50nV/°C Drift, 2.5µV
P-P
Noise 0.01Hz to 10Hz
1-Channel, Differential Input, High Speed/Low Noise,
24-Bit, No Latency
DS ADC
2µV
RMS
Noise at 880Hz, 200nV
RMS
Noise at 6.9Hz,
0.0005% INL, Up to 3.5kHz Output Rate
Scaling Inputs for ±10V Range
30
29
21
31
7
8
6
9
28
11
13
12
17
18
12
10
13
2
1
5
3
6
35
2
2
6
6
5
5
1
3
4
1
33
2
4
36
34
3
26
27
25
19
14
15
4
4
5
32
24
REF
+
REF
–
CH0
CH1
CH2
CH3
COM
ADCINB
ADCINA
OUTA
–INA
OUTB
–INB
CS
SCK
SD0
SDI
BUSY
F
O
EXT
MUOUTA
MUXOUTB
+INA
+INB
LTC2442
U1
GND GND GND
V
–
V
CC
V
+
IN
GND
OUT
TRIM
–
+
2.5V
5V
0.1µF
C13
0.1µF
C8
X0
X1
Y0
Y1
Z0
Z1
INH
X
Y
Z
SDI
CS
SCK
A
B
C
B
C
V
CC
V
EE
GND
11
10
10
9
5V
SDO
5k
R21
1.8k
R22
74HC4053
U4
–2.5V
–2.5V
–2.5V
5V
–2.5V
2.5V
–5V
4.7µF
C15
C14
0.1µF
0.1µF
C17
0.1µF
C9
C10
0.1µF
1Ω
R20
R1
40k
5k
R3
5k
R4
R5
8.88k
R10
7.5k
R9
10k
30k
R6
5V
V
IN1
5V
V
IN2
–5V
LTC2050HV
U2
LT1236N
U3
REF
+
REF
+
–2.5V
–2.5V
MMBT3904
typical application
related parts
LINEAR TECHNOLOGY CORPORATION 2005
LT 0613 REV A • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
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FAX: (408) 434-0507
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