The ADS1113, ADS1114, and ADS1115 (ADS111x) are precision, low-power, 16-bit, I2C-compatible, analog-to-digital converters (ADCs) offered in a leadless X2QFN-10, a SOT-10 package, and a VSSOP-10 package. The ADS111x devices incorporate a low-drift voltage reference and an oscillator. The ADS1114 and ADS1115 also incorporate a programmable gain amplifier (PGA) and a digital comparator. These features, along with a wide operating supply range, are useful for power- and space-constrained, sensor measurement applications.
The ADS111x devices perform conversions at data rates of up to 860 samples per second (SPS). The PGA offers input ranges from ±256mV to ±6.144V, allowing precise large- and small-signal measurements. The ADS1115 features an input multiplexer (MUX) that allows two differential or four single-ended input measurements. Use the digital comparator in the ADS1114 and ADS1115 for undervoltage and overvoltage detection.
PART NUMBER | PACKAGE(1) | PACKAGE SIZE(2) |
---|---|---|
ADS111x | RUG (X2QFN, 10) | 1.50mm × 2.00mm |
DYN (SOT, 10) | 2.90mm × 2.80mm | |
DGS (VSSOP, 10) | 3.00mm × 4.90mm |
PART NUMBER | INPUT CHANNELS | FEATURES(1) |
---|---|---|
ADS1113 | 1 DE (1 SE) | — |
ADS1114 | 1 DE (1 SE) | PGA, comparator |
ADS1115 | 2 DE (4 SE) | PGA, comparator |
DEVICE | RESOLUTION (Bits) |
MAXIMUM SAMPLE RATE (SPS) |
INPUT CHANNELS Differential (Single-Ended) |
PGA | INTERFACE | SPECIAL FEATURES |
---|---|---|---|---|---|---|
ADS1115 | 16 | 860 | 2 (4) | Yes | I2C | Comparator |
ADS1114 | 16 | 860 | 1 (1) | Yes | I2C | Comparator |
ADS1113 | 16 | 860 | 1(1) | No | I2C | None |
ADS1015 | 12 | 3300 | 2 (4) | Yes | I2C | Comparator |
ADS1014 | 12 | 3300 | 1 (1) | Yes | I2C | Comparator |
ADS1013 | 12 | 3300 | 1 (1) | No | I2C | None |
ADS1118 | 16 | 860 | 2 (4) | Yes | SPI | Temperature sensor |
ADS1018 | 12 | 3300 | 2 (4) | Yes | SPI | Temperature sensor |
PIN | TYPE | DESCRIPTION(1) | |||
---|---|---|---|---|---|
NAME | ADS1113 | ADS1114 | ADS1115 | ||
ADDR | 1 | 1 | 1 | Digital input | I2C target address select |
AIN0 | 4 | 4 | 4 | Analog input | Analog input 0 |
AIN1 | 5 | 5 | 5 | Analog input | Analog input 1 |
AIN2 | — | — | 6 | Analog input | Analog input 2 (ADS1115 only) |
AIN3 | — | — | 7 | Analog input | Analog input 3 (ADS1115 only) |
ALERT/RDY | — | 2 | 2 | Digital output | Comparator output or conversion ready (ADS1114 and ADS1115 only). Open-drain output. Connect to VDD using a pullup resistor. |
GND | 3 | 3 | 3 | Analog | Ground |
NC | 2, 6, 7 | 6, 7 | — | — | No connect. Leave the pin floating or connect to GND. |
SCL | 10 | 10 | 10 | Digital input | Serial clock input. Connect to VDD using a pullup resistor. |
SDA | 9 | 9 | 9 | Digital I/O | Serial data input and output. Connect to VDD using a pullup resistor. |
VDD | 8 | 8 | 8 | Analog | Power supply. Connect a 0.1μF, power-supply decoupling capacitor to GND. |