ADS1148 16-Bit 2kSPS 8-Ch ADC With PGA, Reference, and IDAC for Precision Sensor Measurement | TI.com

ADS1148 (ACTIVE)

16-Bit 2kSPS 8-Ch ADC With PGA, Reference, and IDAC for Precision Sensor Measurement

16-Bit 2kSPS 8-Ch ADC With PGA, Reference, and IDAC for Precision Sensor Measurement - ADS1148
 

Recommended alternative parts

  • ADS114S08  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   ADS114S08 has more analog inputs (12), faster sample rate (4kSPS), lower power, smaller package + better VREF drift, OSC accuracy & IDAC matching

Description

The ADS1146, ADS1147, and ADS1148 devices are precision, 16-bit analog-to-digital converters (ADCs) that include many integrated features to reduce system cost and component count for sensor measurement applications. The devices feature a low-noise, programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) ADC with a single-cycle settling digital filter, and an internal oscillator. The ADS1147 and ADS1148 devices also provide a built-in, low-drift voltage reference, and two matched programmable excitation current sources (IDACs).

An input multiplexer supports four differential inputs for the ADS1148, two for the ADS1147, and one for the ADS1146. In addition, the multiplexer integrates sensor burn-out detection, voltage bias for thermocouples, system monitoring, and general purpose digital I/Os (ADS1147 and ADS1148). The PGA provides selectable gains up to 128 V/V. These features provide a complete front-end solution for temperature sensor measurement applications including thermocouples, thermistors, and resistance temperature detectors (RTDs) and other small signal measurements including resistive bridge sensors. The digital filter settles in a single cycle to support fast channel cycling when using the input multiplexer and provides data rates up to 2 kSPS. For data rates of 20 SPS or less, both 50-Hz and 60-Hz interference are rejected by the filter.

Features

  • Programmable Data Rates Up to 2 kSPS
  • Single-Cycle Settling for All Data Rates
  • Simultaneous 50-Hz and 60-Hz Rejection at
    20 SPS
  • Analog Multiplexer With 8 (ADS1148) and
    4 (ADS1147) Independently Selectable Inputs
  • Programmable Gain: 1 V/V to 128 V/V
  • Dual-Matched Programmable Excitation Current Sources
  • Low-Drift Internal 2.048-V Reference
  • Sensor Burnout Detection
  • 4 or 8 General-Purpose I/Os (ADS1147 and ADS1148)
  • Internal Temperature Sensor
  • Power Supply and VREF Monitoring (ADS1147 and ADS1148)
  • Self and System Calibration
  • SPI™-Compatible Serial Interface
  • Analog Supply: Unipolar (2.7 V to 5.25 V) or Bipolar (±2.5 V)
  • Digital Supply: 2.7 V to 5.25 V

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Parametrics Compare all products in Precision ADCs (<=10MSPS)

 
Resolution (Bits)
Sample Rate (Max) (kSPS)
# Input Channels
Interface
Operating Temperature Range (C)
Package Group
Approx. Price (US$)
Power Consumption (Typ) (mW)
Package Size: mm2:W x L (PKG)
Architecture
Input Type
Multi-Channel Configuration
Reference Mode
Features
Input Range (Max) (V)
Input Range (Min) (V)
Analog Voltage AVDD (Min) (V)
Analog Voltage AVDD (Max) (V)
Digital Supply (Min) (V)
Digital Supply (Max) (V)
INL (Max) (+/-LSB)
Rating
Sample Rate (Max) (MSPS)
ADS1148 ADS114S06 ADS114S08 ADS114S08B
16     16     16     16    
2     4     4     4    
8     6     12     12    
SPI     SPI     SPI     SPI    
-40 to 105     -50 to 125     -50 to 125     -40 to 125    
TSSOP
VQFN    
TQFP
VQFN    
TQFP
VQFN    
TQFP
VQFN    
3.95 | 1ku     3.85 | 1ku     4.30 | 1ku     3.95 | 1ku    
2.3     1.75     1.75     1.75    
28TSSOP: 62 mm2: 6.4 x 9.7(TSSOP)
32VQFN: 25 mm2: 5 x 5(VQFN)    
32TQFP: 49 mm2: 7 x 7(TQFP)
32VQFN: 25 mm2: 5 x 5(VQFN)    
32TQFP: 49 mm2: 7 x 7(TQFP)
32VQFN: 25 mm2: 5 x 5(VQFN)    
32TQFP: 49 mm2: 7 x 7(TQFP)
32VQFN: 25 mm2: 5 x 5(VQFN)    
Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma    
Differential
Single-Ended    
Differential
Single-Ended    
Differential
Single-Ended    
Differential
Single-Ended    
Multiplexed     Multiplexed     Multiplexed     Multiplexed    
Ext
Int    
Ext
Int    
Ext
Int    
Ext
Int    
50/60 Hz Rejection
Excitation Current Sources (iDACs)
GPIO
Oscillator
PGA
Temp Sensor    
50/60 Hz Rejection
Excitation Current Sources (iDACs)
GPIO
Oscillator
PGA
Temp Sensor    
50/60 Hz Rejection
Excitation Current Sources (iDACs)
GPIO
Oscillator
PGA
Temp Sensor    
50/60 Hz Rejection
Excitation Current Sources (iDACs)
GPIO
Oscillator
PGA
Temp Sensor    
2.125
4.25    
2.625
5.25    
2.625
5.25    
2.625
5.25    
-2.125
0    
-2.625
0    
-2.625
0    
-2.625
0    
2.7     2.7     2.7     2.7    
5.25     5.25     5.25     5.25    
2.7     2.7     2.7     2.7    
5.25     3.6     3.6     3.6    
1     1     1     1    
Catalog     Catalog     Catalog     Catalog    
0.002     0.004     0.004     0.004    

Other qualified versions of ADS1148

Version Part Number Definition
Automotive ADS1148-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

WEBENCH® Designer ADS1148

Sensor AFE Designer
 RTD
 Thermocouple
 Pressure
 Load
 Voltage Output