Page 1
18-Bit, 2.5Msps SAR ADC
4.096V
100dB SNR
Pseudo-Differential
Unipolar 0V to 4.096V
0V
+
IN
–
IN
5V
–40°C to +125°C
Guaranteed
+
IN
IN
OVDD = 1.8V to 5V
LTC2389-18
–
Internal
Reference
Parallel I/O
Fully Differential
±4.096V
4.096V
0V
4.096V
0V
+
IN
–
IN
Pin-Configurable
Input Range
4.096V
Pseudo-Differential
Bipolar ±2.048V
0V
2.048V
+
IN
–
IN
Pin-Configurable Fully Differential or Pseudo-Differential Input Range
Features
n
18-Bit/16-Bit No Latency, 2.5Msps Pin- and Timing-Compatible SAR ADCs
n
Wide ±4.096V Fully Differential Inputs Maximize Dynamic Range to Achieve 100dB SNR Performance
n
Pin-Configurable Input Ranges ±4.096V, ±2.048V or 0V to 4.096V Allow Flexibility in the Input Signal Chain
n
Precision DC Specifications Feature ±3LSB INL (Max) and 18 Bits No Missing Codes Resolution
n
Precision 20ppm/°C (Max) Internal Reference and Reference Buffer Reduce External Components and Save Board Space
SPI or
18-Bit/16-Bit Pin-Compatible Serial/Parallel I/O SAR ADCs
Power
Consumption Packages
162.5mW100dB
48-Pin
7mm × 7mm
LQFP and QFN
162.5mW96dB
18-Bit
16-Bit
2.5Msps SNR
2389-18
2389-16
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered
trademarks of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Page 2
General Purpose SAR ADCs
250ksps to 450ksps 500ksps to 800ksps 1Msps
1.25Msps to 1.6Msps 2Msps to 2.8Msps 3Msps to 3.5Msps
100ksps to 200ksps
12-Bit to 18-Bit Resolution, 100ksps Up to 3.5Msps
18-Bit
16-Bit
14-Bit
1-Ch2-Ch
1864L
1605-1 1605-2
1865L
1856
8-Ch8-Ch
1867L
2-Ch
6-Ch
2376-18
1864
1606
1865
2376-16
2381-16
2391-16
1609
1605
1859
1867
1418
1603
1417
2364-18
2364-16
1604
1416
2377-18
2377-16
2382-16
2392-16
1608
1419
1408-14
2367-18
2367-16
2378-18
2378-16
2383-16
2393-16
2368-18
2368-16
2379-18 2369-18
2351-14
2380-16
1403A
1414
2389-18
2389-16
2370-16
1403A-1
1411
2356-14
1407A
2355-14
1407A-1
12-Bit
1855
2360
1860L
2-Ch8-Ch 6-Ch 1-Ch1-Ch1-Ch
1861L
1854
1863L
Serial
16- and 18-Bit 250ksps to 2Msps
Pin-Compatible ADCs
5V SPI ADCs in Tiny
DFN/QFN
0V to 2.5V, ±1.25V Unipolar/Bipolar
Input ADCs in MSOP-10
3V Pin-Compatible ADCs
in TSOT-6/TSOT-8 Packages
0V to 4V, ±2V Unipolar/Bipolar
Inputs with 5V, ±5V Supply
1858
1401
1857
1863
2361
1860
1861
1853
1400
Simultaneous
Sampling ADCs
±10V Bipolar
Input ADCs
0V to 2.048V Input,
ADC in SO-8
3V/5V µPower ADCs
2362
1404
2302
2306
1408-12
2308
2365
1409
Pseudo- or Fully Differential
Pin-Compatible ADCs
Fully Differential
Pin-Compatible ADCs
0V to 4.096V, ±2.048V
Unipolar/Bipolar Inputs with
5V or ±5V Supply
1410
1415
2351-12
1851
ParallelSerial/Parallel
Bipolar ±10V
Input ADCs
3V/5V µPower ADCs
0V to 4V, ±4V Unipolar/Bipolar
Inputs with Single ±5V Supply
1402
1403
1403-1
2366
1412
2355-12
2356-12
1407
1407-1
±2.5V Bipolar Inputs
with Single ±5V Supply
±1.8V SoftSpan™ Input
with 5V Supply
www.linear.com/2389-18 n 1-800-4-LINEAR
0412B
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