LTC2487 Datasheet, PDF (32/32 Pages) Linear Technology – 16-Bit 2-/4-Channel ADC with PGA, Easy Drive and I2C Interface

LTC2487
Typical Application
C4
0.1µF
5V
R1
51.1k
R3
I_IN+ = 0
10k TO 100k
5V
102k
10k TO 100k
C3
0.1µF
5V
0.1µF
+
LT1494
–
R4 _{IIN– = 0}
51.1k
1k
0.1µF
1k
0.1µF
5V
10µF
0.1µF
12 _VCC
F_O ¹
= EXTERNAL OSCILLATOR
= INTERNAL OSCILLATOR
LTC2487
13 _REF+
14 _REF–
8 _CH0
9 _CH1
10 _CH2
11 _CH3
7 _COM
1.7k
SDA ⁵
SCL ⁴
2-WIRE
I²C INTERFACE
CA0 ²
CA1 ³
9-PIN SELECTABLE
ADDRESSES
6
GND
2487 F37
Figure 37. Easy Drive ADCs Simplify Measurement of High Impedance Sensors
Related Parts
PART NUMBER
LT1236A-5
LT1460
LT1790
LTC2400
LTC2410
LTC2440
LTC2442
LTC2449
LTC2480/LTC2482/
LTC2484
LTC2481/LTC2483/
LTC2485
LTC2486/LTC2488/
LTC2492
LTC2489
LTC2493
LTC2495/LTC2497/
LTC2499
LTC2496/LTC2498
DESCRIPTION
Precision Bandgap Reference, 5V
Micropower Series Reference
Micropower SOT-23 Low Dropout Reference Family
24-Bit, No Latency ΔΣ ADC in SO-8
24-Bit, No Latency ΔΣ ADC with Differential Inputs
24-Bit, High Speed, Low Noise ΔΣ ADC
24-Bit, High Speed, 2-/4-Channel ΔΣ ADC with Integrated
Amplifier
24-Bit, High Speed, 8-/16-Channel ΔΣ ADC
16-/24-Bit ΔΣ ADCs with Easy Drive Inputs, 600nV Noise,
Programmable Gain, and Temperature Sensor
16-/24-Bit ΔΣ ADCs with Easy Drive Inputs, 600nV Noise,
I²C Interface, Programmable Gain, and Temperature Sensor
16-Bit/24-Bit 2-/4-Channel ΔΣ ADC with Easy Drive Inputs, SPI
Interface, Programmable Gain, and Temperature Sensor
16-Bit 2-/4-Channel ΔΣ ADC with Easy Drive Inputs and
I²C Interface
24-Bit 2-/4-Channel ΔΣ ADC with Easy Drive Inputs and
I²C Interface
16-Bit/24-Bit 8-/16-Channel ΔΣ ADC with Easy Drive Inputs and
I²C Interface, Programmable Gain, and Temperature Sensor
16-/24-Bit 8-/16-Channel ΔΣ ADC with Easy Drive Inputs and
SPI Interface
COMMENTS
0.05% Max Initial Accuracy, 5ppm/°C Drift
0.075% Max Initial Accuracy, 10ppm/°C Max Drift
0.05% Max Initial Accuracy, 10ppm/°C Max Drift
0.3ppm Noise, 4ppm INL, 10ppm Total Unadjusted Error, 200µA
0.8µV_RMS Noise, 2ppm INL
3.5kHz Output Rate, 200nV Noise, 24.6 ENOBs
8kHz Output Rate, 200nV Noise, Simultaneous 50Hz/60Hz
Rejection
8kHz Output Rate, 200nV Noise, Simultaneous 50Hz/60Hz
Rejection
Pin Compatible 16-Bit and 24-Bit Versions
Pin Compatible 16-Bit and 24-Bit Versions
Pin-Compatible 16-Bit and 24-Bit Versions
Pin Compatible with LTC2487/LTC2493
Pin Compatible with LTC2487/LTC2489
Pin-Compatible 16-Bit and 24-Bit Versions
Pin Compatible with LTC2449/LTC2494
32 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
2487fa
LT/CGRAFX 0407 REV A • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2007