TLA2021 12-Bit 1-Ch Delta-Sigma ADC w/ Voltage Reference, Oscillator, and I2C for Low-Cost Applications |


12-Bit 1-Ch Delta-Sigma ADC w/ Voltage Reference, Oscillator, and I2C for Low-Cost Applications



The TLA2021, TLA2022, and TLA2024 devices (TLA202x) are easy-to-use, low-power, 12-bit delta-sigma (ΔΣ) analog-to-digital converters (ADCs) targeted for any type of system-monitoring applications (such as supply or battery voltage supervision, current sensing, or temperature measurements). Offered in an ultra-small, leadless, 10-pin X2QFN package, the TLA2021 and TLA2022 are single-channel ADCs while the TLA2024 features a flexible input multiplexer (MUX) with two differential or four single-ended input measurement options.

The TLA202x integrate a voltage reference and oscillator. Additionally, the TLA2022 and TLA2024 include a programmable gain amplifier (PGA) with selectable input ranges from ±256 mV to ±6.144 V, enabling both large- and small-signal measurements.

The TLA202x communicate via an I2C-compatible interface and operate in either continuous or single-shot conversion mode. The devices automatically power down after one conversion in single-shot conversion mode, significantly reducing power consumption during idle periods.

All of these features, along with a wide operating supply voltage range, make the TLA202x suitable for power- and space-constrained, system-monitoring applications.


  • Industry’s Lowest-Cost 12-Bit Delta-Sigma ADCs
  • Ultra-Small X2QFN Package: 2 mm × 1.5 mm
  • Highly Integrated:
    • 4 Single-Ended or 2 Differential Inputs Make the TLA2024 the Industry’s Highest Channel Density ADC (0.75 mm² per Channel)
    • PGA (TLA2022 and TLA2024 Only)
    • Voltage Reference
    • Oscillator
  • Low Current Consumption: 150 µA
  • Wide Supply Range: 2 V to 5.5 V
  • Programmable Data Rate: 128 SPS to 3.3 kSPS
  • I2C™ Compatible Interface:
    • Supports Standard-Mode and Fast-Mode
    • Three Pin-Selectable I2C Addresses
  • Operating Temperature Range: –40°C to +85°C

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

Resolution (Bits)
Sample Rate (Max) (kSPS)
Number of input channels
Operating temperature range (C)
Package Group
Approx. price (US$)
Power consumption (Typ) (mW)
Package size: mm2:W x L (PKG)
Input type
Multi-channel configuration
Reference mode
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)
TLA2021 TLA2022 TLA2024
12     12     12    
3.3     3.3     3.3    
1     1     4    
I2C     I2C     I2C    
-40 to 85     -40 to 85     -40 to 85    
X2QFN | 10     X2QFN | 10     X2QFN | 10    
0.55 | 1ku     0.60 | 1ku     0.65 | 1ku    
0.3     0.3     0.3    
10X2QFN: 3 mm2: 2 x 1.5 (X2QFN | 10)     10X2QFN: 3 mm2: 2 x 1.5 (X2QFN | 10)     10X2QFN: 3 mm2: 2 x 1.5 (X2QFN | 10)    
Delta-Sigma     Delta-Sigma     Delta-Sigma    
Int     Int     Int    
Small Size    
Small Size    
Small Size    
5.5     5.5     5.5    
0     0     0    
2     2     2    
5.5     5.5     5.5    
2     2     2    
5.5     5.5     5.5    
Catalog     Catalog     Catalog