The ADS1120 is a precision, 16-bit, analog-to-digital converter (ADC) that offers many integrated features to reduce system cost and component count in applications measuring small sensor signals. The device features two differential or four single-ended inputs through a flexible input multiplexer (MUX), a low-noise, programmable gain amplifier (PGA), two programmable excitation current sources, a voltage reference, an oscillator, a low-side switch, and a precision temperature sensor.
The device can perform conversions at data rates up to 2000 samples-per-second (SPS) with single-cycle settling. At 20 SPS, the digital filter offers simultaneous 50-Hz and 60-Hz rejection for noisy industrial applications. The internal PGA offers gains up to 128 V/V. This PGA makes the ADS1120 ideally-suited for applications measuring small sensor signals, such as resistance temperature detectors (RTDs), thermocouples, thermistors, and bridge sensors. The device supports measurements of pseudo- or fully-differential signals when using the PGA. Alternatively, the device can be configured to bypass the internal PGA while still providing high input impedance and gains up to 4 V/V, allowing for single-ended measurements.
Power consumption is as low as 120 µA when operating in duty-cycle mode with the PGA disabled. The ADS1120 is offered in a leadless VQFN-16 or a TSSOP-16 package and is specified over a temperature range of –40°C to +125°C.
Resolution (Bits) |
Sample Rate (Max) (kSPS) |
Number of 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 |
ADS1120 | ADS112U04 | ADS1147 | ADS114S06 | ADS114S06B |
---|---|---|---|---|
16 | 16 | 16 | 16 | 16 |
2 | 2 | 2 | 4 | 4 |
4 | 4 | 4 | 6 | 6 |
SPI | UART | SPI | SPI | SPI |
-40 to 125 | -40 to 125 | -40 to 105 | -50 to 125 | -40 to 125 |
TSSOP | 16
VQFN | 16 |
TSSOP | 16
WQFN | 16 |
TSSOP | 20 |
TQFP | 32
VQFN | 32 |
TQFP | 32
VQFN | 32 |
3.15 | 1ku | 3.15 | 1ku | 3.45 | 1ku | 3.85 | 1ku | 3.55 | 1ku |
1.4 | 1.4 | 2.3 | 1.75 | 1.75 |
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)
16VQFN: 12 mm2: 3.5 x 3.5 (VQFN | 16) |
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)
16WQFN: 9 mm2: 3 x 3 (WQFN | 16) |
20TSSOP: 42 mm2: 6.4 x 6.5 (TSSOP | 20) |
32TQFP: 49 mm2: 7 x 7 (TQFP | 32)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32) |
32TQFP: 49 mm2: 7 x 7 (TQFP | 32)
32VQFN: 25 mm2: 5 x 5 (VQFN | 32) |
Delta-Sigma | Delta-Sigma | Delta-Sigma | Delta-Sigma | Delta-Sigma |
Differential Single-Ended |
Differential Single-Ended |
Differential Single-Ended |
Differential Single-Ended |
Differential Single-Ended |
Multiplexed | Multiplexed | Multiplexed | Multiplexed | Multiplexed |
Ext Int Supply |
Ext Int |
Ext Int |
Ext Int |
Ext Int |
50/60 Hz Rejection Excitation Current Sources (iDACs) Oscillator PGA Temp Sensor |
50/60 Hz Rejection Excitation Current Sources (iDACs) GPIO Oscillator PGA Temp Sensor Small Size |
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 |
2.85 5.6 |
2.85 5.6 |
2.125 4.25 |
2.625 5.25 |
2.625 5.25 |
-2.85 0 |
-2.85 0 |
-2.125 0 |
-2.625 0 |
-2.625 0 |
2.3 | 2.3 | 2.7 | 2.7 | 2.7 |
5.5 | 5.5 | 5.25 | 5.25 | 5.25 |
2.3 | 2.3 | 2.7 | 2.7 | 2.7 |
5.5 | 5.5 | 5.25 | 3.6 | 3.6 |
1.3 | 1 | 1 | 1 | |
Catalog | Catalog | Catalog | Catalog | Catalog |
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