The MAX127/MAX128 are multirange, 12-bit data acquisition systems (DAS) that require only a single +5V supply for operation, yet accept signals at their analog inputs that may span above the power-supply rail and below ground. These systems provide eight analog input channels that are independently software programmable for a variety of ranges: ±10V, ±5V, 0 to +10V, 0 to +5V for the MAX127; and ±V_REF, ±V_REF/2, 0 to +V_REF, 0 to +V_REF/2 for the MAX128. This range switching increases the effective dynamic range to 14 bits and provides the flexibility to interface 4–20mA, ±12V, and ±15V-powered sensors directly to a single +5V system. In addition, these converters are fault protected to ±16.5V; a fault condition on any channel will not affect the conversion result of the selected channel. Other features include a 5MHz bandwidth track/hold, an 8ksps throughput rate, and the option of an internal 4.096V or external reference.

The MAX127/MAX128 feature a 2-wire, I²C-compatible serial interface that allows communication among multiple devices using SDA and SCL lines.

A hardware shutdown input (SHDN) and two software-programmable power-down modes (standby and full power-down) are provided for low-current shutdown between conversions. In standby mode, the reference buffer remains active, eliminating startup delays.

The MAX127/MAX128 are available in 24-pin narrow PDIP or space-saving 28-pin SSOP packages.

MAX127、MAX127A、MAX127B、MAX128、MAX128A、MAX128B：標準動作回路

拡大表示+

主な特長

12-Bit Resolution, 1/2 LSB Linearity
+5V Single-Supply Operation
I²C-Compatible, 2-Wire Serial Interface
Four Software-Selectable Input Ranges
- MAX127: 0 to +10V, 0 to +5V, ±10V, ±5V
- MAX128: 0 to +V_REF, 0 to +V_REF/2, ±V_REF, ±V_REF/2
8 Analog Input Channels
8ksps Sampling Rate
±16.5V Overvoltage-Tolerant Input Multiplexer
Internal 4.096V or External Reference
Two Power-Down Modes
24-Pin Narrow PDIP or 28-Pin SSOP Packages

アプリケーション/用途

バッテリ駆動アプリケーション
データ収集
産業用制御システム
ロボット工学

スペックパラメータ

Part Number

Resolution
(bits)

Input Chan.

Conv. Rate
(ksps)

ADC Architecture

Data Bus

Diff/S.E. Input

Internal V_REF
(V)

External V_REF
(V)

Unipolar V_IN
(V)

Bipolar V_IN
(±V)

SNR
(dB)

THD
(dB)

INL
(±LSB)

Package/Pins

Budgetary
Price

ADC

max

nominal

min

max

See Notes

MAX127

SAR

I²C

S.E. Only

4.096

2.4

4.18

-87

PDIP/24

SSOP/28

$14.64 @1k

MAX128

4.096

2.048

PDIP/24

SSOP/28

$12.15 @1k

全Precision ADCs (< 5Msps) (443)

価格についての注：

このページに掲載された価格は、類似製品と比較するための参考価格です。価格は米国ドルで表記されており変更されることがあります。購入数によって価格は大幅に変わることがあり、米国以外での価格は各地域の関税、税金、手数料、および為替レートによって異なることがあります。購入数やバージョンが確定されている場合の価格および在庫状況については、購入に関するページを参照いただくか正規代理店までお問い合わせください。